diff --git a/toolchain/check/import_cpp.cpp b/toolchain/check/import_cpp.cpp
index f9bb874230ab4..73835789ae7f4 100644
--- a/toolchain/check/import_cpp.cpp
+++ b/toolchain/check/import_cpp.cpp
@@ -310,13 +310,28 @@ static auto MakeIntType(Context& context, IntId size_id) -> TypeExpr {
   return ExprAsType(context, Parse::NodeId::None, type_inst_id);
 }
 
-// Maps a C++ type to a Carbon type. Currently only 32-bit `int` is supported.
+// Maps a C++ type to a Carbon type.
 // TODO: Support more types.
 static auto MapType(Context& context, clang::QualType type) -> TypeExpr {
   const auto* builtin_type = dyn_cast<clang::BuiltinType>(type);
-  if (builtin_type && builtin_type->getKind() == clang::BuiltinType::Int &&
-      context.ast_context().getTypeSize(type) == 32) {
-    return MakeIntType(context, context.ints().Add(32));
+  if (!builtin_type) {
+    return {.inst_id = SemIR::ErrorInst::TypeInstId,
+            .type_id = SemIR::ErrorInst::TypeId};
+  }
+  // TODO: Refactor to avoid duplication.
+  switch (builtin_type->getKind()) {
+    case clang::BuiltinType::Short:
+      if (context.ast_context().getTypeSize(type) == 16) {
+        return MakeIntType(context, context.ints().Add(16));
+      }
+      break;
+    case clang::BuiltinType::Int:
+      if (context.ast_context().getTypeSize(type) == 32) {
+        return MakeIntType(context, context.ints().Add(32));
+      }
+      break;
+    default:
+      break;
   }
   return {.inst_id = SemIR::ErrorInst::TypeInstId,
           .type_id = SemIR::ErrorInst::TypeId};
diff --git a/toolchain/check/testdata/interop/cpp/function_decl.carbon b/toolchain/check/testdata/interop/cpp/function_decl.carbon
index e10f115572913..a56d1b965e929 100644
--- a/toolchain/check/testdata/interop/cpp/function_decl.carbon
+++ b/toolchain/check/testdata/interop/cpp/function_decl.carbon
@@ -8,6 +8,20 @@
 // TIP: To dump output, run:
 // TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/function_decl.carbon
 
+// --- short_return_function_decl.h
+
+auto foo_short() -> short;
+
+// --- import_short_return_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "short_return_function_decl.h";
+
+fn F() {
+  let x: i16 = Cpp.foo_short();
+}
+
 // --- int_return_function_decl.h
 
 auto foo_int() -> int;
@@ -348,6 +362,271 @@ fn F() {
   Cpp.foo(&a);
 }
 
+// --- short_param_function_decl.h
+
+auto foo(short a) -> void;
+
+// --- import_short_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "short_param_function_decl.h";
+
+fn F() {
+  Cpp.foo(1 as i16);
+}
+
+// --- short_int_param_function_decl.h
+
+auto foo(short int a) -> void;
+
+// --- import_short_int_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "short_int_param_function_decl.h";
+
+fn F() {
+  Cpp.foo(1 as i16);
+}
+
+// --- signed_short_param_function_decl.h
+
+auto foo(signed short a) -> void;
+
+// --- import_signed_short_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "signed_short_param_function_decl.h";
+
+fn F() {
+  Cpp.foo(1 as i16);
+}
+
+// --- signed_short_int_param_function_decl.h
+
+auto foo(signed short int a) -> void;
+
+// --- import_signed_short_int_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "signed_short_int_param_function_decl.h";
+
+fn F() {
+  Cpp.foo(1 as i16);
+}
+
+// --- int16_t_param_function_decl.h
+
+namespace std {
+  // Mimicking glibc definition for int16_t: https://codebrowser.dev/glibc/glibc/posix/bits/types.h.html#__int16_t
+  typedef signed short int int16_t;
+} // namespace std
+
+auto foo(std::int16_t a) -> void;
+
+// --- import_int16_t_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "int16_t_param_function_decl.h";
+
+fn F() {
+  Cpp.foo(1 as i16);
+}
+
+// --- short_max_param_function_decl.h
+
+auto foo(short a) -> void;
+
+// --- import_short_max_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "short_max_param_function_decl.h";
+
+fn F() {
+  Cpp.foo(0x7FFF);
+}
+
+// --- overflow_short_max_param_function_decl.h
+
+auto foo(short a) -> void;
+
+// --- fail_overflow_short_max_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "overflow_short_max_param_function_decl.h";
+
+fn F() {
+  // CHECK:STDERR: fail_overflow_short_max_param_function_decl.carbon:[[@LINE+5]]:11: error: integer value 32768 too large for type `i16` [IntTooLargeForType]
+  // CHECK:STDERR:   Cpp.foo(0x8000);
+  // CHECK:STDERR:           ^~~~~~
+  // CHECK:STDERR: fail_overflow_short_max_param_function_decl.carbon: note: initializing function parameter [InCallToFunctionParam]
+  // CHECK:STDERR:
+  Cpp.foo(0x8000);
+}
+
+// --- short_min_param_function_decl.h
+
+auto foo(short a) -> void;
+
+// --- import_short_min_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "short_min_param_function_decl.h";
+
+fn F() {
+  Cpp.foo(-0x8000);
+}
+
+// --- overflow_short_min_param_function_decl.h
+
+auto foo(short a) -> void;
+
+// --- fail_overflow_short_min_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "overflow_short_min_param_function_decl.h";
+
+fn F() {
+  // CHECK:STDERR: fail_overflow_short_min_param_function_decl.carbon:[[@LINE+5]]:11: error: integer value -32769 too large for type `i16` [IntTooLargeForType]
+  // CHECK:STDERR:   Cpp.foo(-0x8001);
+  // CHECK:STDERR:           ^~~~~~~
+  // CHECK:STDERR: fail_overflow_short_min_param_function_decl.carbon: note: initializing function parameter [InCallToFunctionParam]
+  // CHECK:STDERR:
+  Cpp.foo(-0x8001);
+}
+
+// --- int32_arg_short_param_function_decl.h
+
+auto foo(short a) -> void;
+
+// --- fail_int32_arg_short_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "int32_arg_short_param_function_decl.h";
+
+fn F() {
+  // CHECK:STDERR: fail_int32_arg_short_param_function_decl.carbon:[[@LINE+8]]:11: error: cannot implicitly convert expression of type `i32` to `i16` [ConversionFailure]
+  // CHECK:STDERR:   Cpp.foo(1 as i32);
+  // CHECK:STDERR:           ^~~~~~~~
+  // CHECK:STDERR: fail_int32_arg_short_param_function_decl.carbon:[[@LINE+5]]:11: note: type `i32` does not implement interface `Core.ImplicitAs(i16)` [MissingImplInMemberAccessNote]
+  // CHECK:STDERR:   Cpp.foo(1 as i32);
+  // CHECK:STDERR:           ^~~~~~~~
+  // CHECK:STDERR: fail_int32_arg_short_param_function_decl.carbon: note: initializing function parameter [InCallToFunctionParam]
+  // CHECK:STDERR:
+  Cpp.foo(1 as i32);
+}
+
+// --- short_const_param_function_decl.h
+
+auto foo(const short a) -> void;
+
+// --- import_short_const_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "short_const_param_function_decl.h";
+
+fn F() {
+  Cpp.foo(1 as i16);
+}
+
+// --- short_ref_param_function_decl.h
+
+auto foo(short& a) -> void;
+
+// --- fail_todo_short_ref_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "short_ref_param_function_decl.h";
+
+fn F() {
+  var a: i16 = 1;
+  // CHECK:STDERR: fail_todo_short_ref_param_function_decl.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: parameter type: short &` [SemanticsTodo]
+  // CHECK:STDERR:   Cpp.foo(a);
+  // CHECK:STDERR:   ^~~~~~~
+  // CHECK:STDERR: fail_todo_short_ref_param_function_decl.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
+  // CHECK:STDERR:   Cpp.foo(a);
+  // CHECK:STDERR:   ^~~~~~~
+  // CHECK:STDERR:
+  Cpp.foo(a);
+}
+
+// --- short_const_ref_param_function_decl.h
+
+auto foo(const short& a) -> void;
+
+// --- fail_todo_short_const_ref_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "short_const_ref_param_function_decl.h";
+
+fn F() {
+  var a: i16 = 1;
+  // CHECK:STDERR: fail_todo_short_const_ref_param_function_decl.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: parameter type: const short &` [SemanticsTodo]
+  // CHECK:STDERR:   Cpp.foo(a);
+  // CHECK:STDERR:   ^~~~~~~
+  // CHECK:STDERR: fail_todo_short_const_ref_param_function_decl.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
+  // CHECK:STDERR:   Cpp.foo(a);
+  // CHECK:STDERR:   ^~~~~~~
+  // CHECK:STDERR:
+  Cpp.foo(a);
+}
+
+// --- short_pointer_param_function_decl.h
+
+auto foo(short* a) -> void;
+
+// --- fail_todo_short_pointer_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "short_pointer_param_function_decl.h";
+
+fn F() {
+  var a: i16 = 1;
+  // CHECK:STDERR: fail_todo_short_pointer_param_function_decl.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: parameter type: short *` [SemanticsTodo]
+  // CHECK:STDERR:   Cpp.foo(&a);
+  // CHECK:STDERR:   ^~~~~~~
+  // CHECK:STDERR: fail_todo_short_pointer_param_function_decl.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
+  // CHECK:STDERR:   Cpp.foo(&a);
+  // CHECK:STDERR:   ^~~~~~~
+  // CHECK:STDERR:
+  Cpp.foo(&a);
+}
+
+// --- short_const_pointer_param_function_decl.h
+
+auto foo(const short* a) -> void;
+
+// --- fail_todo_short_const_pointer_param_function_decl.carbon
+
+library "[[@TEST_NAME]]";
+
+import Cpp library "short_const_pointer_param_function_decl.h";
+
+fn F() {
+  var a: i16 = 1;
+  // CHECK:STDERR: fail_todo_short_const_pointer_param_function_decl.carbon:[[@LINE+7]]:3: error: semantics TODO: `Unsupported: parameter type: const short *` [SemanticsTodo]
+  // CHECK:STDERR:   Cpp.foo(&a);
+  // CHECK:STDERR:   ^~~~~~~
+  // CHECK:STDERR: fail_todo_short_const_pointer_param_function_decl.carbon:[[@LINE+4]]:3: note: in `Cpp` name lookup for `foo` [InCppNameLookup]
+  // CHECK:STDERR:   Cpp.foo(&a);
+  // CHECK:STDERR:   ^~~~~~~
+  // CHECK:STDERR:
+  Cpp.foo(&a);
+}
+
 // --- unsupported_primitive_type_param_function_decl.h
 
 auto foo(float a) -> void;
@@ -390,6 +669,69 @@ fn F() {
   Cpp.foo(1, 2.0);
 }
 
+// CHECK:STDOUT: --- import_short_return_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %pattern_type.2f8: type = pattern_type %i16 [concrete]
+// CHECK:STDOUT:   %foo_short.type: type = fn_type @foo_short [concrete]
+// CHECK:STDOUT:   %foo_short: %foo_short.type = struct_value () [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo_short = @F.%foo_short.decl
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "short_return_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   name_binding_decl {
+// CHECK:STDOUT:     %x.patt: %pattern_type.2f8 = binding_pattern x [concrete]
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %int_16.1: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.1: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %foo_short.decl: %foo_short.type = fn_decl @foo_short [concrete = constants.%foo_short] {} {}
+// CHECK:STDOUT:   %foo_short.ref: %foo_short.type = name_ref foo_short, %foo_short.decl [concrete = constants.%foo_short]
+// CHECK:STDOUT:   %foo_short.call: init %i16 = call %foo_short.ref()
+// CHECK:STDOUT:   %.loc7_10: type = splice_block %i16.loc7 [concrete = constants.%i16] {
+// CHECK:STDOUT:     %int_16.loc7: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:     %i16.loc7: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %.loc7_30.1: ref %i16 = temporary_storage
+// CHECK:STDOUT:   %.loc7_30.2: ref %i16 = temporary %.loc7_30.1, %foo_short.call
+// CHECK:STDOUT:   %x: ref %i16 = bind_name x, %.loc7_30.2
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @foo_short();
+// CHECK:STDOUT:
 // CHECK:STDOUT: --- import_int_return_function_decl.carbon
 // CHECK:STDOUT:
 // CHECK:STDOUT: constants {
@@ -2064,6 +2406,1309 @@ fn F() {
 // CHECK:STDOUT:   return
 // CHECK:STDOUT: }
 // CHECK:STDOUT:
+// CHECK:STDOUT: --- import_short_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %foo.type: type = fn_type @foo [concrete]
+// CHECK:STDOUT:   %foo: %foo.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
+// CHECK:STDOUT:   %As.type.90f: type = generic_interface_type @As [concrete]
+// CHECK:STDOUT:   %As.generic: %As.type.90f = struct_value () [concrete]
+// CHECK:STDOUT:   %As.type.a96: type = facet_type <@As, @As(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.be5: type = fn_type @Convert.1, @As(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.062: type = fn_type @Convert.5, @impl.686(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.527: %Convert.type.062 = struct_value () [symbolic]
+// CHECK:STDOUT:   %As.impl_witness.0ef: <witness> = impl_witness imports.%As.impl_witness_table.eb4, @impl.686(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.172: type = fn_type @Convert.5, @impl.686(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.489: %Convert.type.172 = struct_value () [concrete]
+// CHECK:STDOUT:   %As.facet: %As.type.a96 = facet_value Core.IntLiteral, (%As.impl_witness.0ef) [concrete]
+// CHECK:STDOUT:   %.91d: type = fn_type_with_self_type %Convert.type.be5, %As.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_1.5b8, %Convert.489 [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.489, @Convert.5(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_1.f90: %i16 = int_value 1 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .As = %Core.As
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = @F.%foo.decl
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.As: %As.type.90f = import_ref Core//prelude/operators/as, As, loaded [concrete = constants.%As.generic]
+// CHECK:STDOUT:   %Core.import_ref.78a: @impl.686.%Convert.type (%Convert.type.062) = import_ref Core//prelude/types/int, loc28_39, loaded [symbolic = @impl.686.%Convert (constants.%Convert.527)]
+// CHECK:STDOUT:   %As.impl_witness_table.eb4 = impl_witness_table (%Core.import_ref.78a), @impl.686 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "short_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %int_16.1: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.1: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %foo.decl: %foo.type = fn_decl @foo [concrete = constants.%foo] {} {}
+// CHECK:STDOUT:   %foo.ref: %foo.type = name_ref foo, %foo.decl [concrete = constants.%foo]
+// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
+// CHECK:STDOUT:   %int_16.loc7: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.loc7: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %impl.elem0: %.91d = impl_witness_access constants.%As.impl_witness.0ef, element0 [concrete = constants.%Convert.489]
+// CHECK:STDOUT:   %bound_method.loc7_13.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.5(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc7_13.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc7_13.2(%int_1) [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_13.1: %i16 = value_of_initializer %int.convert_checked [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_13.2: %i16 = converted %int_1, %.loc7_13.1 [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call %foo.ref(%.loc7_13.2)
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @foo();
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- import_short_int_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %foo.type: type = fn_type @foo [concrete]
+// CHECK:STDOUT:   %foo: %foo.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
+// CHECK:STDOUT:   %As.type.90f: type = generic_interface_type @As [concrete]
+// CHECK:STDOUT:   %As.generic: %As.type.90f = struct_value () [concrete]
+// CHECK:STDOUT:   %As.type.a96: type = facet_type <@As, @As(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.be5: type = fn_type @Convert.1, @As(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.062: type = fn_type @Convert.5, @impl.686(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.527: %Convert.type.062 = struct_value () [symbolic]
+// CHECK:STDOUT:   %As.impl_witness.0ef: <witness> = impl_witness imports.%As.impl_witness_table.eb4, @impl.686(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.172: type = fn_type @Convert.5, @impl.686(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.489: %Convert.type.172 = struct_value () [concrete]
+// CHECK:STDOUT:   %As.facet: %As.type.a96 = facet_value Core.IntLiteral, (%As.impl_witness.0ef) [concrete]
+// CHECK:STDOUT:   %.91d: type = fn_type_with_self_type %Convert.type.be5, %As.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_1.5b8, %Convert.489 [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.489, @Convert.5(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_1.f90: %i16 = int_value 1 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .As = %Core.As
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = @F.%foo.decl
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.As: %As.type.90f = import_ref Core//prelude/operators/as, As, loaded [concrete = constants.%As.generic]
+// CHECK:STDOUT:   %Core.import_ref.78a: @impl.686.%Convert.type (%Convert.type.062) = import_ref Core//prelude/types/int, loc28_39, loaded [symbolic = @impl.686.%Convert (constants.%Convert.527)]
+// CHECK:STDOUT:   %As.impl_witness_table.eb4 = impl_witness_table (%Core.import_ref.78a), @impl.686 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "short_int_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %int_16.1: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.1: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %foo.decl: %foo.type = fn_decl @foo [concrete = constants.%foo] {} {}
+// CHECK:STDOUT:   %foo.ref: %foo.type = name_ref foo, %foo.decl [concrete = constants.%foo]
+// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
+// CHECK:STDOUT:   %int_16.loc7: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.loc7: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %impl.elem0: %.91d = impl_witness_access constants.%As.impl_witness.0ef, element0 [concrete = constants.%Convert.489]
+// CHECK:STDOUT:   %bound_method.loc7_13.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.5(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc7_13.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc7_13.2(%int_1) [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_13.1: %i16 = value_of_initializer %int.convert_checked [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_13.2: %i16 = converted %int_1, %.loc7_13.1 [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call %foo.ref(%.loc7_13.2)
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @foo();
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- import_signed_short_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %foo.type: type = fn_type @foo [concrete]
+// CHECK:STDOUT:   %foo: %foo.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
+// CHECK:STDOUT:   %As.type.90f: type = generic_interface_type @As [concrete]
+// CHECK:STDOUT:   %As.generic: %As.type.90f = struct_value () [concrete]
+// CHECK:STDOUT:   %As.type.a96: type = facet_type <@As, @As(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.be5: type = fn_type @Convert.1, @As(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.062: type = fn_type @Convert.5, @impl.686(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.527: %Convert.type.062 = struct_value () [symbolic]
+// CHECK:STDOUT:   %As.impl_witness.0ef: <witness> = impl_witness imports.%As.impl_witness_table.eb4, @impl.686(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.172: type = fn_type @Convert.5, @impl.686(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.489: %Convert.type.172 = struct_value () [concrete]
+// CHECK:STDOUT:   %As.facet: %As.type.a96 = facet_value Core.IntLiteral, (%As.impl_witness.0ef) [concrete]
+// CHECK:STDOUT:   %.91d: type = fn_type_with_self_type %Convert.type.be5, %As.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_1.5b8, %Convert.489 [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.489, @Convert.5(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_1.f90: %i16 = int_value 1 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .As = %Core.As
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = @F.%foo.decl
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.As: %As.type.90f = import_ref Core//prelude/operators/as, As, loaded [concrete = constants.%As.generic]
+// CHECK:STDOUT:   %Core.import_ref.78a: @impl.686.%Convert.type (%Convert.type.062) = import_ref Core//prelude/types/int, loc28_39, loaded [symbolic = @impl.686.%Convert (constants.%Convert.527)]
+// CHECK:STDOUT:   %As.impl_witness_table.eb4 = impl_witness_table (%Core.import_ref.78a), @impl.686 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "signed_short_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %int_16.1: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.1: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %foo.decl: %foo.type = fn_decl @foo [concrete = constants.%foo] {} {}
+// CHECK:STDOUT:   %foo.ref: %foo.type = name_ref foo, %foo.decl [concrete = constants.%foo]
+// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
+// CHECK:STDOUT:   %int_16.loc7: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.loc7: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %impl.elem0: %.91d = impl_witness_access constants.%As.impl_witness.0ef, element0 [concrete = constants.%Convert.489]
+// CHECK:STDOUT:   %bound_method.loc7_13.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.5(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc7_13.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc7_13.2(%int_1) [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_13.1: %i16 = value_of_initializer %int.convert_checked [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_13.2: %i16 = converted %int_1, %.loc7_13.1 [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call %foo.ref(%.loc7_13.2)
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @foo();
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- import_signed_short_int_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %foo.type: type = fn_type @foo [concrete]
+// CHECK:STDOUT:   %foo: %foo.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
+// CHECK:STDOUT:   %As.type.90f: type = generic_interface_type @As [concrete]
+// CHECK:STDOUT:   %As.generic: %As.type.90f = struct_value () [concrete]
+// CHECK:STDOUT:   %As.type.a96: type = facet_type <@As, @As(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.be5: type = fn_type @Convert.1, @As(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.062: type = fn_type @Convert.5, @impl.686(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.527: %Convert.type.062 = struct_value () [symbolic]
+// CHECK:STDOUT:   %As.impl_witness.0ef: <witness> = impl_witness imports.%As.impl_witness_table.eb4, @impl.686(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.172: type = fn_type @Convert.5, @impl.686(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.489: %Convert.type.172 = struct_value () [concrete]
+// CHECK:STDOUT:   %As.facet: %As.type.a96 = facet_value Core.IntLiteral, (%As.impl_witness.0ef) [concrete]
+// CHECK:STDOUT:   %.91d: type = fn_type_with_self_type %Convert.type.be5, %As.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_1.5b8, %Convert.489 [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.489, @Convert.5(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_1.f90: %i16 = int_value 1 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .As = %Core.As
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = @F.%foo.decl
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.As: %As.type.90f = import_ref Core//prelude/operators/as, As, loaded [concrete = constants.%As.generic]
+// CHECK:STDOUT:   %Core.import_ref.78a: @impl.686.%Convert.type (%Convert.type.062) = import_ref Core//prelude/types/int, loc28_39, loaded [symbolic = @impl.686.%Convert (constants.%Convert.527)]
+// CHECK:STDOUT:   %As.impl_witness_table.eb4 = impl_witness_table (%Core.import_ref.78a), @impl.686 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "signed_short_int_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %int_16.1: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.1: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %foo.decl: %foo.type = fn_decl @foo [concrete = constants.%foo] {} {}
+// CHECK:STDOUT:   %foo.ref: %foo.type = name_ref foo, %foo.decl [concrete = constants.%foo]
+// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
+// CHECK:STDOUT:   %int_16.loc7: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.loc7: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %impl.elem0: %.91d = impl_witness_access constants.%As.impl_witness.0ef, element0 [concrete = constants.%Convert.489]
+// CHECK:STDOUT:   %bound_method.loc7_13.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.5(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc7_13.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc7_13.2(%int_1) [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_13.1: %i16 = value_of_initializer %int.convert_checked [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_13.2: %i16 = converted %int_1, %.loc7_13.1 [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call %foo.ref(%.loc7_13.2)
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @foo();
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- import_int16_t_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %foo.type: type = fn_type @foo [concrete]
+// CHECK:STDOUT:   %foo: %foo.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
+// CHECK:STDOUT:   %As.type.90f: type = generic_interface_type @As [concrete]
+// CHECK:STDOUT:   %As.generic: %As.type.90f = struct_value () [concrete]
+// CHECK:STDOUT:   %As.type.a96: type = facet_type <@As, @As(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.be5: type = fn_type @Convert.1, @As(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.062: type = fn_type @Convert.5, @impl.686(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.527: %Convert.type.062 = struct_value () [symbolic]
+// CHECK:STDOUT:   %As.impl_witness.0ef: <witness> = impl_witness imports.%As.impl_witness_table.eb4, @impl.686(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.172: type = fn_type @Convert.5, @impl.686(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.489: %Convert.type.172 = struct_value () [concrete]
+// CHECK:STDOUT:   %As.facet: %As.type.a96 = facet_value Core.IntLiteral, (%As.impl_witness.0ef) [concrete]
+// CHECK:STDOUT:   %.91d: type = fn_type_with_self_type %Convert.type.be5, %As.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_1.5b8, %Convert.489 [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.489, @Convert.5(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_1.f90: %i16 = int_value 1 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .As = %Core.As
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = @F.%foo.decl
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.As: %As.type.90f = import_ref Core//prelude/operators/as, As, loaded [concrete = constants.%As.generic]
+// CHECK:STDOUT:   %Core.import_ref.78a: @impl.686.%Convert.type (%Convert.type.062) = import_ref Core//prelude/types/int, loc28_39, loaded [symbolic = @impl.686.%Convert (constants.%Convert.527)]
+// CHECK:STDOUT:   %As.impl_witness_table.eb4 = impl_witness_table (%Core.import_ref.78a), @impl.686 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "int16_t_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %int_16.1: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.1: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %foo.decl: %foo.type = fn_decl @foo [concrete = constants.%foo] {} {}
+// CHECK:STDOUT:   %foo.ref: %foo.type = name_ref foo, %foo.decl [concrete = constants.%foo]
+// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
+// CHECK:STDOUT:   %int_16.loc7: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.loc7: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %impl.elem0: %.91d = impl_witness_access constants.%As.impl_witness.0ef, element0 [concrete = constants.%Convert.489]
+// CHECK:STDOUT:   %bound_method.loc7_13.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.5(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc7_13.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc7_13.2(%int_1) [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_13.1: %i16 = value_of_initializer %int.convert_checked [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_13.2: %i16 = converted %int_1, %.loc7_13.1 [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call %foo.ref(%.loc7_13.2)
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @foo();
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- import_short_max_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %foo.type: type = fn_type @foo [concrete]
+// CHECK:STDOUT:   %foo: %foo.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_32767.f4b: Core.IntLiteral = int_value 32767 [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
+// CHECK:STDOUT:   %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.adb: type = facet_type <@ImplicitAs, @ImplicitAs(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.fa6: type = fn_type @Convert.1, @ImplicitAs(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.0f9: type = fn_type @Convert.2, @impl.4f9(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.f06: %Convert.type.0f9 = struct_value () [symbolic]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness.97b: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.a2f, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.33c: type = fn_type @Convert.2, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.d0a: %Convert.type.33c = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.facet: %ImplicitAs.type.adb = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.97b) [concrete]
+// CHECK:STDOUT:   %.236: type = fn_type_with_self_type %Convert.type.fa6, %ImplicitAs.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_32767.f4b, %Convert.d0a [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.d0a, @Convert.2(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_32767.f4b, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_32767.faa: %i16 = int_value 32767 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .ImplicitAs = %Core.ImplicitAs
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = @F.%foo.decl
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/operators/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
+// CHECK:STDOUT:   %Core.import_ref.a5b: @impl.4f9.%Convert.type (%Convert.type.0f9) = import_ref Core//prelude/types/int, loc19_39, loaded [symbolic = @impl.4f9.%Convert (constants.%Convert.f06)]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.a2f = impl_witness_table (%Core.import_ref.a5b), @impl.4f9 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "short_max_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %foo.decl: %foo.type = fn_decl @foo [concrete = constants.%foo] {} {}
+// CHECK:STDOUT:   %foo.ref: %foo.type = name_ref foo, %foo.decl [concrete = constants.%foo]
+// CHECK:STDOUT:   %int_32767: Core.IntLiteral = int_value 32767 [concrete = constants.%int_32767.f4b]
+// CHECK:STDOUT:   %impl.elem0: %.236 = impl_witness_access constants.%ImplicitAs.impl_witness.97b, element0 [concrete = constants.%Convert.d0a]
+// CHECK:STDOUT:   %bound_method.loc7_11.1: <bound method> = bound_method %int_32767, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.2(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc7_11.2: <bound method> = bound_method %int_32767, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc7_11.2(%int_32767) [concrete = constants.%int_32767.faa]
+// CHECK:STDOUT:   %.loc7_11.1: %i16 = value_of_initializer %int.convert_checked [concrete = constants.%int_32767.faa]
+// CHECK:STDOUT:   %.loc7_11.2: %i16 = converted %int_32767, %.loc7_11.1 [concrete = constants.%int_32767.faa]
+// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call %foo.ref(%.loc7_11.2)
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @foo();
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- fail_overflow_short_max_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %foo.type: type = fn_type @foo [concrete]
+// CHECK:STDOUT:   %foo: %foo.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_32768.4d0: Core.IntLiteral = int_value 32768 [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
+// CHECK:STDOUT:   %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.adb: type = facet_type <@ImplicitAs, @ImplicitAs(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.fa6: type = fn_type @Convert.1, @ImplicitAs(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.0f9: type = fn_type @Convert.2, @impl.4f9(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.f06: %Convert.type.0f9 = struct_value () [symbolic]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness.97b: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.a2f, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.33c: type = fn_type @Convert.2, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.d0a: %Convert.type.33c = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.facet: %ImplicitAs.type.adb = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.97b) [concrete]
+// CHECK:STDOUT:   %.236: type = fn_type_with_self_type %Convert.type.fa6, %ImplicitAs.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_32768.4d0, %Convert.d0a [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.d0a, @Convert.2(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_32768.4d0, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_32768.e7f: %i16 = int_value 32768 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .ImplicitAs = %Core.ImplicitAs
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = @F.%foo.decl
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/operators/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
+// CHECK:STDOUT:   %Core.import_ref.a5b: @impl.4f9.%Convert.type (%Convert.type.0f9) = import_ref Core//prelude/types/int, loc19_39, loaded [symbolic = @impl.4f9.%Convert (constants.%Convert.f06)]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.a2f = impl_witness_table (%Core.import_ref.a5b), @impl.4f9 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "overflow_short_max_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %foo.decl: %foo.type = fn_decl @foo [concrete = constants.%foo] {} {}
+// CHECK:STDOUT:   %foo.ref: %foo.type = name_ref foo, %foo.decl [concrete = constants.%foo]
+// CHECK:STDOUT:   %int_32768: Core.IntLiteral = int_value 32768 [concrete = constants.%int_32768.4d0]
+// CHECK:STDOUT:   %impl.elem0: %.236 = impl_witness_access constants.%ImplicitAs.impl_witness.97b, element0 [concrete = constants.%Convert.d0a]
+// CHECK:STDOUT:   %bound_method.loc12_11.1: <bound method> = bound_method %int_32768, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.2(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc12_11.2: <bound method> = bound_method %int_32768, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc12_11.2(%int_32768) [concrete = constants.%int_32768.e7f]
+// CHECK:STDOUT:   %.loc12_11.1: %i16 = value_of_initializer %int.convert_checked [concrete = constants.%int_32768.e7f]
+// CHECK:STDOUT:   %.loc12_11.2: %i16 = converted %int_32768, %.loc12_11.1 [concrete = constants.%int_32768.e7f]
+// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call %foo.ref(%.loc12_11.2)
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @foo();
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- import_short_min_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %foo.type: type = fn_type @foo [concrete]
+// CHECK:STDOUT:   %foo: %foo.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_32768: Core.IntLiteral = int_value 32768 [concrete]
+// CHECK:STDOUT:   %Negate.type: type = facet_type <@Negate> [concrete]
+// CHECK:STDOUT:   %Op.type.e42: type = fn_type @Op.1 [concrete]
+// CHECK:STDOUT:   %Negate.impl_witness.561: <witness> = impl_witness imports.%Negate.impl_witness_table.e09 [concrete]
+// CHECK:STDOUT:   %Negate.facet: %Negate.type = facet_value Core.IntLiteral, (%Negate.impl_witness.561) [concrete]
+// CHECK:STDOUT:   %.63a: type = fn_type_with_self_type %Op.type.e42, %Negate.facet [concrete]
+// CHECK:STDOUT:   %Op.type.1be: type = fn_type @Op.2 [concrete]
+// CHECK:STDOUT:   %Op.bba: %Op.type.1be = struct_value () [concrete]
+// CHECK:STDOUT:   %Op.bound: <bound method> = bound_method %int_32768, %Op.bba [concrete]
+// CHECK:STDOUT:   %int_-32768.882: Core.IntLiteral = int_value -32768 [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
+// CHECK:STDOUT:   %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.adb: type = facet_type <@ImplicitAs, @ImplicitAs(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.fa6: type = fn_type @Convert.1, @ImplicitAs(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.0f9: type = fn_type @Convert.2, @impl.4f9(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.f06: %Convert.type.0f9 = struct_value () [symbolic]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness.97b: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.a2f, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.33c: type = fn_type @Convert.2, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.d0a: %Convert.type.33c = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.facet: %ImplicitAs.type.adb = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.97b) [concrete]
+// CHECK:STDOUT:   %.236: type = fn_type_with_self_type %Convert.type.fa6, %ImplicitAs.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_-32768.882, %Convert.d0a [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.d0a, @Convert.2(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_-32768.882, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_-32768.7e5: %i16 = int_value -32768 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .Negate = %Core.Negate
+// CHECK:STDOUT:     .ImplicitAs = %Core.ImplicitAs
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = @F.%foo.decl
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.Negate: type = import_ref Core//prelude/operators/arithmetic, Negate, loaded [concrete = constants.%Negate.type]
+// CHECK:STDOUT:   %Core.import_ref.c15: %Op.type.1be = import_ref Core//prelude/operators/arithmetic, loc94_31, loaded [concrete = constants.%Op.bba]
+// CHECK:STDOUT:   %Negate.impl_witness_table.e09 = impl_witness_table (%Core.import_ref.c15), @impl.8cb [concrete]
+// CHECK:STDOUT:   %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/operators/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
+// CHECK:STDOUT:   %Core.import_ref.a5b: @impl.4f9.%Convert.type (%Convert.type.0f9) = import_ref Core//prelude/types/int, loc19_39, loaded [symbolic = @impl.4f9.%Convert (constants.%Convert.f06)]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.a2f = impl_witness_table (%Core.import_ref.a5b), @impl.4f9 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "short_min_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %foo.decl: %foo.type = fn_decl @foo [concrete = constants.%foo] {} {}
+// CHECK:STDOUT:   %foo.ref: %foo.type = name_ref foo, %foo.decl [concrete = constants.%foo]
+// CHECK:STDOUT:   %int_32768: Core.IntLiteral = int_value 32768 [concrete = constants.%int_32768]
+// CHECK:STDOUT:   %impl.elem0.loc7_11.1: %.63a = impl_witness_access constants.%Negate.impl_witness.561, element0 [concrete = constants.%Op.bba]
+// CHECK:STDOUT:   %bound_method.loc7_11.1: <bound method> = bound_method %int_32768, %impl.elem0.loc7_11.1 [concrete = constants.%Op.bound]
+// CHECK:STDOUT:   %int.snegate: init Core.IntLiteral = call %bound_method.loc7_11.1(%int_32768) [concrete = constants.%int_-32768.882]
+// CHECK:STDOUT:   %impl.elem0.loc7_11.2: %.236 = impl_witness_access constants.%ImplicitAs.impl_witness.97b, element0 [concrete = constants.%Convert.d0a]
+// CHECK:STDOUT:   %bound_method.loc7_11.2: <bound method> = bound_method %int.snegate, %impl.elem0.loc7_11.2 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0.loc7_11.2, @Convert.2(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc7_11.3: <bound method> = bound_method %int.snegate, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %.loc7_11.1: Core.IntLiteral = value_of_initializer %int.snegate [concrete = constants.%int_-32768.882]
+// CHECK:STDOUT:   %.loc7_11.2: Core.IntLiteral = converted %int.snegate, %.loc7_11.1 [concrete = constants.%int_-32768.882]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc7_11.3(%.loc7_11.2) [concrete = constants.%int_-32768.7e5]
+// CHECK:STDOUT:   %.loc7_11.3: %i16 = value_of_initializer %int.convert_checked [concrete = constants.%int_-32768.7e5]
+// CHECK:STDOUT:   %.loc7_11.4: %i16 = converted %int.snegate, %.loc7_11.3 [concrete = constants.%int_-32768.7e5]
+// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call %foo.ref(%.loc7_11.4)
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @foo();
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- fail_overflow_short_min_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %foo.type: type = fn_type @foo [concrete]
+// CHECK:STDOUT:   %foo: %foo.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_32769: Core.IntLiteral = int_value 32769 [concrete]
+// CHECK:STDOUT:   %Negate.type: type = facet_type <@Negate> [concrete]
+// CHECK:STDOUT:   %Op.type.e42: type = fn_type @Op.1 [concrete]
+// CHECK:STDOUT:   %Negate.impl_witness.561: <witness> = impl_witness imports.%Negate.impl_witness_table.e09 [concrete]
+// CHECK:STDOUT:   %Negate.facet: %Negate.type = facet_value Core.IntLiteral, (%Negate.impl_witness.561) [concrete]
+// CHECK:STDOUT:   %.63a: type = fn_type_with_self_type %Op.type.e42, %Negate.facet [concrete]
+// CHECK:STDOUT:   %Op.type.1be: type = fn_type @Op.2 [concrete]
+// CHECK:STDOUT:   %Op.bba: %Op.type.1be = struct_value () [concrete]
+// CHECK:STDOUT:   %Op.bound: <bound method> = bound_method %int_32769, %Op.bba [concrete]
+// CHECK:STDOUT:   %int_-32769.5a5: Core.IntLiteral = int_value -32769 [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
+// CHECK:STDOUT:   %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.adb: type = facet_type <@ImplicitAs, @ImplicitAs(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.fa6: type = fn_type @Convert.1, @ImplicitAs(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.0f9: type = fn_type @Convert.2, @impl.4f9(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.f06: %Convert.type.0f9 = struct_value () [symbolic]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness.97b: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.a2f, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.33c: type = fn_type @Convert.2, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.d0a: %Convert.type.33c = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.facet: %ImplicitAs.type.adb = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.97b) [concrete]
+// CHECK:STDOUT:   %.236: type = fn_type_with_self_type %Convert.type.fa6, %ImplicitAs.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_-32769.5a5, %Convert.d0a [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.d0a, @Convert.2(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_-32769.5a5, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_-32769.883: %i16 = int_value -32769 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .Negate = %Core.Negate
+// CHECK:STDOUT:     .ImplicitAs = %Core.ImplicitAs
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = @F.%foo.decl
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.Negate: type = import_ref Core//prelude/operators/arithmetic, Negate, loaded [concrete = constants.%Negate.type]
+// CHECK:STDOUT:   %Core.import_ref.c15: %Op.type.1be = import_ref Core//prelude/operators/arithmetic, loc94_31, loaded [concrete = constants.%Op.bba]
+// CHECK:STDOUT:   %Negate.impl_witness_table.e09 = impl_witness_table (%Core.import_ref.c15), @impl.8cb [concrete]
+// CHECK:STDOUT:   %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/operators/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
+// CHECK:STDOUT:   %Core.import_ref.a5b: @impl.4f9.%Convert.type (%Convert.type.0f9) = import_ref Core//prelude/types/int, loc19_39, loaded [symbolic = @impl.4f9.%Convert (constants.%Convert.f06)]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.a2f = impl_witness_table (%Core.import_ref.a5b), @impl.4f9 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "overflow_short_min_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %foo.decl: %foo.type = fn_decl @foo [concrete = constants.%foo] {} {}
+// CHECK:STDOUT:   %foo.ref: %foo.type = name_ref foo, %foo.decl [concrete = constants.%foo]
+// CHECK:STDOUT:   %int_32769: Core.IntLiteral = int_value 32769 [concrete = constants.%int_32769]
+// CHECK:STDOUT:   %impl.elem0.loc12_11.1: %.63a = impl_witness_access constants.%Negate.impl_witness.561, element0 [concrete = constants.%Op.bba]
+// CHECK:STDOUT:   %bound_method.loc12_11.1: <bound method> = bound_method %int_32769, %impl.elem0.loc12_11.1 [concrete = constants.%Op.bound]
+// CHECK:STDOUT:   %int.snegate: init Core.IntLiteral = call %bound_method.loc12_11.1(%int_32769) [concrete = constants.%int_-32769.5a5]
+// CHECK:STDOUT:   %impl.elem0.loc12_11.2: %.236 = impl_witness_access constants.%ImplicitAs.impl_witness.97b, element0 [concrete = constants.%Convert.d0a]
+// CHECK:STDOUT:   %bound_method.loc12_11.2: <bound method> = bound_method %int.snegate, %impl.elem0.loc12_11.2 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0.loc12_11.2, @Convert.2(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc12_11.3: <bound method> = bound_method %int.snegate, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %.loc12_11.1: Core.IntLiteral = value_of_initializer %int.snegate [concrete = constants.%int_-32769.5a5]
+// CHECK:STDOUT:   %.loc12_11.2: Core.IntLiteral = converted %int.snegate, %.loc12_11.1 [concrete = constants.%int_-32769.5a5]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc12_11.3(%.loc12_11.2) [concrete = constants.%int_-32769.883]
+// CHECK:STDOUT:   %.loc12_11.3: %i16 = value_of_initializer %int.convert_checked [concrete = constants.%int_-32769.883]
+// CHECK:STDOUT:   %.loc12_11.4: %i16 = converted %int.snegate, %.loc12_11.3 [concrete = constants.%int_-32769.883]
+// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call %foo.ref(%.loc12_11.4)
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @foo();
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- fail_int32_arg_short_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %foo.type: type = fn_type @foo [concrete]
+// CHECK:STDOUT:   %foo: %foo.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
+// CHECK:STDOUT:   %int_32: Core.IntLiteral = int_value 32 [concrete]
+// CHECK:STDOUT:   %i32: type = class_type @Int, @Int(%int_32) [concrete]
+// CHECK:STDOUT:   %As.type.90f: type = generic_interface_type @As [concrete]
+// CHECK:STDOUT:   %As.generic: %As.type.90f = struct_value () [concrete]
+// CHECK:STDOUT:   %As.type.fd4: type = facet_type <@As, @As(%i32)> [concrete]
+// CHECK:STDOUT:   %Convert.type.99b: type = fn_type @Convert.1, @As(%i32) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
+// CHECK:STDOUT:   %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
+// CHECK:STDOUT:   %Convert.type.062: type = fn_type @Convert.5, @impl.686(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.527: %Convert.type.062 = struct_value () [symbolic]
+// CHECK:STDOUT:   %As.impl_witness.6b4: <witness> = impl_witness imports.%As.impl_witness_table.eb4, @impl.686(%int_32) [concrete]
+// CHECK:STDOUT:   %Convert.type.4fd: type = fn_type @Convert.5, @impl.686(%int_32) [concrete]
+// CHECK:STDOUT:   %Convert.197: %Convert.type.4fd = struct_value () [concrete]
+// CHECK:STDOUT:   %As.facet: %As.type.fd4 = facet_value Core.IntLiteral, (%As.impl_witness.6b4) [concrete]
+// CHECK:STDOUT:   %.982: type = fn_type_with_self_type %Convert.type.99b, %As.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_1.5b8, %Convert.197 [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.197, @Convert.5(%int_32) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_1.5d2: %i32 = int_value 1 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .As = %Core.As
+// CHECK:STDOUT:     .ImplicitAs = %Core.ImplicitAs
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = @F.%foo.decl
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.As: %As.type.90f = import_ref Core//prelude/operators/as, As, loaded [concrete = constants.%As.generic]
+// CHECK:STDOUT:   %Core.import_ref.78a: @impl.686.%Convert.type (%Convert.type.062) = import_ref Core//prelude/types/int, loc28_39, loaded [symbolic = @impl.686.%Convert (constants.%Convert.527)]
+// CHECK:STDOUT:   %As.impl_witness_table.eb4 = impl_witness_table (%Core.import_ref.78a), @impl.686 [concrete]
+// CHECK:STDOUT:   %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/operators/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "int32_arg_short_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %foo.decl: %foo.type = fn_decl @foo [concrete = constants.%foo] {} {}
+// CHECK:STDOUT:   %foo.ref: %foo.type = name_ref foo, %foo.decl [concrete = constants.%foo]
+// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
+// CHECK:STDOUT:   %int_32: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
+// CHECK:STDOUT:   %i32: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
+// CHECK:STDOUT:   %impl.elem0: %.982 = impl_witness_access constants.%As.impl_witness.6b4, element0 [concrete = constants.%Convert.197]
+// CHECK:STDOUT:   %bound_method.loc15_13.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.5(constants.%int_32) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc15_13.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i32 = call %bound_method.loc15_13.2(%int_1) [concrete = constants.%int_1.5d2]
+// CHECK:STDOUT:   %.loc15_13.1: %i32 = value_of_initializer %int.convert_checked [concrete = constants.%int_1.5d2]
+// CHECK:STDOUT:   %.loc15_13.2: %i32 = converted %int_1, %.loc15_13.1 [concrete = constants.%int_1.5d2]
+// CHECK:STDOUT:   %.loc15_13.3: %i16 = converted %.loc15_13.2, <error> [concrete = <error>]
+// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call %foo.ref(<error>)
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @foo();
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- import_short_const_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %foo.type: type = fn_type @foo [concrete]
+// CHECK:STDOUT:   %foo: %foo.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
+// CHECK:STDOUT:   %As.type.90f: type = generic_interface_type @As [concrete]
+// CHECK:STDOUT:   %As.generic: %As.type.90f = struct_value () [concrete]
+// CHECK:STDOUT:   %As.type.a96: type = facet_type <@As, @As(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.be5: type = fn_type @Convert.1, @As(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.062: type = fn_type @Convert.5, @impl.686(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.527: %Convert.type.062 = struct_value () [symbolic]
+// CHECK:STDOUT:   %As.impl_witness.0ef: <witness> = impl_witness imports.%As.impl_witness_table.eb4, @impl.686(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.172: type = fn_type @Convert.5, @impl.686(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.489: %Convert.type.172 = struct_value () [concrete]
+// CHECK:STDOUT:   %As.facet: %As.type.a96 = facet_value Core.IntLiteral, (%As.impl_witness.0ef) [concrete]
+// CHECK:STDOUT:   %.91d: type = fn_type_with_self_type %Convert.type.be5, %As.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_1.5b8, %Convert.489 [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.489, @Convert.5(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_1.f90: %i16 = int_value 1 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .As = %Core.As
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = @F.%foo.decl
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.As: %As.type.90f = import_ref Core//prelude/operators/as, As, loaded [concrete = constants.%As.generic]
+// CHECK:STDOUT:   %Core.import_ref.78a: @impl.686.%Convert.type (%Convert.type.062) = import_ref Core//prelude/types/int, loc28_39, loaded [symbolic = @impl.686.%Convert (constants.%Convert.527)]
+// CHECK:STDOUT:   %As.impl_witness_table.eb4 = impl_witness_table (%Core.import_ref.78a), @impl.686 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "short_const_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %int_16.1: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.1: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %foo.decl: %foo.type = fn_decl @foo [concrete = constants.%foo] {} {}
+// CHECK:STDOUT:   %foo.ref: %foo.type = name_ref foo, %foo.decl [concrete = constants.%foo]
+// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
+// CHECK:STDOUT:   %int_16.loc7: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:   %i16.loc7: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   %impl.elem0: %.91d = impl_witness_access constants.%As.impl_witness.0ef, element0 [concrete = constants.%Convert.489]
+// CHECK:STDOUT:   %bound_method.loc7_13.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.5(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc7_13.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc7_13.2(%int_1) [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_13.1: %i16 = value_of_initializer %int.convert_checked [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_13.2: %i16 = converted %int_1, %.loc7_13.1 [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %foo.call: init %empty_tuple.type = call %foo.ref(%.loc7_13.2)
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @foo();
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- fail_todo_short_ref_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %pattern_type.2f8: type = pattern_type %i16 [concrete]
+// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
+// CHECK:STDOUT:   %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.adb: type = facet_type <@ImplicitAs, @ImplicitAs(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.fa6: type = fn_type @Convert.1, @ImplicitAs(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.0f9: type = fn_type @Convert.2, @impl.4f9(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.f06: %Convert.type.0f9 = struct_value () [symbolic]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness.97b: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.a2f, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.33c: type = fn_type @Convert.2, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.d0a: %Convert.type.33c = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.facet: %ImplicitAs.type.adb = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.97b) [concrete]
+// CHECK:STDOUT:   %.236: type = fn_type_with_self_type %Convert.type.fa6, %ImplicitAs.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_1.5b8, %Convert.d0a [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.d0a, @Convert.2(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_1.f90: %i16 = int_value 1 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .ImplicitAs = %Core.ImplicitAs
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = <error>
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/operators/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
+// CHECK:STDOUT:   %Core.import_ref.a5b: @impl.4f9.%Convert.type (%Convert.type.0f9) = import_ref Core//prelude/types/int, loc19_39, loaded [symbolic = @impl.4f9.%Convert (constants.%Convert.f06)]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.a2f = impl_witness_table (%Core.import_ref.a5b), @impl.4f9 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "short_ref_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   name_binding_decl {
+// CHECK:STDOUT:     %a.patt: %pattern_type.2f8 = binding_pattern a [concrete]
+// CHECK:STDOUT:     %.loc7_3.1: %pattern_type.2f8 = var_pattern %a.patt [concrete]
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %a.var: ref %i16 = var a
+// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
+// CHECK:STDOUT:   %impl.elem0: %.236 = impl_witness_access constants.%ImplicitAs.impl_witness.97b, element0 [concrete = constants.%Convert.d0a]
+// CHECK:STDOUT:   %bound_method.loc7_3.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.2(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc7_3.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc7_3.2(%int_1) [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_3.2: init %i16 = converted %int_1, %int.convert_checked [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   assign %a.var, %.loc7_3.2
+// CHECK:STDOUT:   %.loc7_10: type = splice_block %i16 [concrete = constants.%i16] {
+// CHECK:STDOUT:     %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:     %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %a: ref %i16 = bind_name a, %a.var
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
+// CHECK:STDOUT:   %a.ref: ref %i16 = name_ref a, %a
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- fail_todo_short_const_ref_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %pattern_type.2f8: type = pattern_type %i16 [concrete]
+// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
+// CHECK:STDOUT:   %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.adb: type = facet_type <@ImplicitAs, @ImplicitAs(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.fa6: type = fn_type @Convert.1, @ImplicitAs(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.0f9: type = fn_type @Convert.2, @impl.4f9(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.f06: %Convert.type.0f9 = struct_value () [symbolic]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness.97b: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.a2f, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.33c: type = fn_type @Convert.2, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.d0a: %Convert.type.33c = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.facet: %ImplicitAs.type.adb = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.97b) [concrete]
+// CHECK:STDOUT:   %.236: type = fn_type_with_self_type %Convert.type.fa6, %ImplicitAs.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_1.5b8, %Convert.d0a [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.d0a, @Convert.2(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_1.f90: %i16 = int_value 1 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .ImplicitAs = %Core.ImplicitAs
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = <error>
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/operators/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
+// CHECK:STDOUT:   %Core.import_ref.a5b: @impl.4f9.%Convert.type (%Convert.type.0f9) = import_ref Core//prelude/types/int, loc19_39, loaded [symbolic = @impl.4f9.%Convert (constants.%Convert.f06)]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.a2f = impl_witness_table (%Core.import_ref.a5b), @impl.4f9 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "short_const_ref_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   name_binding_decl {
+// CHECK:STDOUT:     %a.patt: %pattern_type.2f8 = binding_pattern a [concrete]
+// CHECK:STDOUT:     %.loc7_3.1: %pattern_type.2f8 = var_pattern %a.patt [concrete]
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %a.var: ref %i16 = var a
+// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
+// CHECK:STDOUT:   %impl.elem0: %.236 = impl_witness_access constants.%ImplicitAs.impl_witness.97b, element0 [concrete = constants.%Convert.d0a]
+// CHECK:STDOUT:   %bound_method.loc7_3.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.2(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc7_3.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc7_3.2(%int_1) [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_3.2: init %i16 = converted %int_1, %int.convert_checked [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   assign %a.var, %.loc7_3.2
+// CHECK:STDOUT:   %.loc7_10: type = splice_block %i16 [concrete = constants.%i16] {
+// CHECK:STDOUT:     %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:     %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %a: ref %i16 = bind_name a, %a.var
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
+// CHECK:STDOUT:   %a.ref: ref %i16 = name_ref a, %a
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- fail_todo_short_pointer_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %pattern_type.2f8: type = pattern_type %i16 [concrete]
+// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
+// CHECK:STDOUT:   %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.adb: type = facet_type <@ImplicitAs, @ImplicitAs(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.fa6: type = fn_type @Convert.1, @ImplicitAs(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.0f9: type = fn_type @Convert.2, @impl.4f9(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.f06: %Convert.type.0f9 = struct_value () [symbolic]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness.97b: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.a2f, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.33c: type = fn_type @Convert.2, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.d0a: %Convert.type.33c = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.facet: %ImplicitAs.type.adb = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.97b) [concrete]
+// CHECK:STDOUT:   %.236: type = fn_type_with_self_type %Convert.type.fa6, %ImplicitAs.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_1.5b8, %Convert.d0a [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.d0a, @Convert.2(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_1.f90: %i16 = int_value 1 [concrete]
+// CHECK:STDOUT:   %ptr.251: type = ptr_type %i16 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .ImplicitAs = %Core.ImplicitAs
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = <error>
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/operators/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
+// CHECK:STDOUT:   %Core.import_ref.a5b: @impl.4f9.%Convert.type (%Convert.type.0f9) = import_ref Core//prelude/types/int, loc19_39, loaded [symbolic = @impl.4f9.%Convert (constants.%Convert.f06)]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.a2f = impl_witness_table (%Core.import_ref.a5b), @impl.4f9 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "short_pointer_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   name_binding_decl {
+// CHECK:STDOUT:     %a.patt: %pattern_type.2f8 = binding_pattern a [concrete]
+// CHECK:STDOUT:     %.loc7_3.1: %pattern_type.2f8 = var_pattern %a.patt [concrete]
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %a.var: ref %i16 = var a
+// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
+// CHECK:STDOUT:   %impl.elem0: %.236 = impl_witness_access constants.%ImplicitAs.impl_witness.97b, element0 [concrete = constants.%Convert.d0a]
+// CHECK:STDOUT:   %bound_method.loc7_3.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.2(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc7_3.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc7_3.2(%int_1) [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_3.2: init %i16 = converted %int_1, %int.convert_checked [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   assign %a.var, %.loc7_3.2
+// CHECK:STDOUT:   %.loc7_10: type = splice_block %i16 [concrete = constants.%i16] {
+// CHECK:STDOUT:     %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:     %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %a: ref %i16 = bind_name a, %a.var
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
+// CHECK:STDOUT:   %a.ref: ref %i16 = name_ref a, %a
+// CHECK:STDOUT:   %addr: %ptr.251 = addr_of %a.ref
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: --- fail_todo_short_const_pointer_param_function_decl.carbon
+// CHECK:STDOUT:
+// CHECK:STDOUT: constants {
+// CHECK:STDOUT:   %F.type: type = fn_type @F [concrete]
+// CHECK:STDOUT:   %F: %F.type = struct_value () [concrete]
+// CHECK:STDOUT:   %int_16: Core.IntLiteral = int_value 16 [concrete]
+// CHECK:STDOUT:   %Int.type: type = generic_class_type @Int [concrete]
+// CHECK:STDOUT:   %Int.generic: %Int.type = struct_value () [concrete]
+// CHECK:STDOUT:   %i16: type = class_type @Int, @Int(%int_16) [concrete]
+// CHECK:STDOUT:   %pattern_type.2f8: type = pattern_type %i16 [concrete]
+// CHECK:STDOUT:   %int_1.5b8: Core.IntLiteral = int_value 1 [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
+// CHECK:STDOUT:   %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.type.adb: type = facet_type <@ImplicitAs, @ImplicitAs(%i16)> [concrete]
+// CHECK:STDOUT:   %Convert.type.fa6: type = fn_type @Convert.1, @ImplicitAs(%i16) [concrete]
+// CHECK:STDOUT:   %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
+// CHECK:STDOUT:   %Convert.type.0f9: type = fn_type @Convert.2, @impl.4f9(%To.c80) [symbolic]
+// CHECK:STDOUT:   %Convert.f06: %Convert.type.0f9 = struct_value () [symbolic]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness.97b: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.a2f, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.type.33c: type = fn_type @Convert.2, @impl.4f9(%int_16) [concrete]
+// CHECK:STDOUT:   %Convert.d0a: %Convert.type.33c = struct_value () [concrete]
+// CHECK:STDOUT:   %ImplicitAs.facet: %ImplicitAs.type.adb = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.97b) [concrete]
+// CHECK:STDOUT:   %.236: type = fn_type_with_self_type %Convert.type.fa6, %ImplicitAs.facet [concrete]
+// CHECK:STDOUT:   %Convert.bound: <bound method> = bound_method %int_1.5b8, %Convert.d0a [concrete]
+// CHECK:STDOUT:   %Convert.specific_fn: <specific function> = specific_function %Convert.d0a, @Convert.2(%int_16) [concrete]
+// CHECK:STDOUT:   %bound_method: <bound method> = bound_method %int_1.5b8, %Convert.specific_fn [concrete]
+// CHECK:STDOUT:   %int_1.f90: %i16 = int_value 1 [concrete]
+// CHECK:STDOUT:   %ptr.251: type = ptr_type %i16 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: imports {
+// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
+// CHECK:STDOUT:     .Int = %Core.Int
+// CHECK:STDOUT:     .ImplicitAs = %Core.ImplicitAs
+// CHECK:STDOUT:     import Core//prelude
+// CHECK:STDOUT:     import Core//prelude/...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
+// CHECK:STDOUT:     .foo = <error>
+// CHECK:STDOUT:     import Cpp//...
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
+// CHECK:STDOUT:   %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/operators/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
+// CHECK:STDOUT:   %Core.import_ref.a5b: @impl.4f9.%Convert.type (%Convert.type.0f9) = import_ref Core//prelude/types/int, loc19_39, loaded [symbolic = @impl.4f9.%Convert (constants.%Convert.f06)]
+// CHECK:STDOUT:   %ImplicitAs.impl_witness_table.a2f = impl_witness_table (%Core.import_ref.a5b), @impl.4f9 [concrete]
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: file {
+// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
+// CHECK:STDOUT:     .Core = imports.%Core
+// CHECK:STDOUT:     .Cpp = imports.%Cpp
+// CHECK:STDOUT:     .F = %F.decl
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %Core.import = import Core
+// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
+// CHECK:STDOUT:     import Cpp "short_const_pointer_param_function_decl.h"
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {} {}
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
+// CHECK:STDOUT: fn @F() {
+// CHECK:STDOUT: !entry:
+// CHECK:STDOUT:   name_binding_decl {
+// CHECK:STDOUT:     %a.patt: %pattern_type.2f8 = binding_pattern a [concrete]
+// CHECK:STDOUT:     %.loc7_3.1: %pattern_type.2f8 = var_pattern %a.patt [concrete]
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %a.var: ref %i16 = var a
+// CHECK:STDOUT:   %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1.5b8]
+// CHECK:STDOUT:   %impl.elem0: %.236 = impl_witness_access constants.%ImplicitAs.impl_witness.97b, element0 [concrete = constants.%Convert.d0a]
+// CHECK:STDOUT:   %bound_method.loc7_3.1: <bound method> = bound_method %int_1, %impl.elem0 [concrete = constants.%Convert.bound]
+// CHECK:STDOUT:   %specific_fn: <specific function> = specific_function %impl.elem0, @Convert.2(constants.%int_16) [concrete = constants.%Convert.specific_fn]
+// CHECK:STDOUT:   %bound_method.loc7_3.2: <bound method> = bound_method %int_1, %specific_fn [concrete = constants.%bound_method]
+// CHECK:STDOUT:   %int.convert_checked: init %i16 = call %bound_method.loc7_3.2(%int_1) [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   %.loc7_3.2: init %i16 = converted %int_1, %int.convert_checked [concrete = constants.%int_1.f90]
+// CHECK:STDOUT:   assign %a.var, %.loc7_3.2
+// CHECK:STDOUT:   %.loc7_10: type = splice_block %i16 [concrete = constants.%i16] {
+// CHECK:STDOUT:     %int_16: Core.IntLiteral = int_value 16 [concrete = constants.%int_16]
+// CHECK:STDOUT:     %i16: type = class_type @Int, @Int(constants.%int_16) [concrete = constants.%i16]
+// CHECK:STDOUT:   }
+// CHECK:STDOUT:   %a: ref %i16 = bind_name a, %a.var
+// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
+// CHECK:STDOUT:   %foo.ref: <error> = name_ref foo, <error> [concrete = <error>]
+// CHECK:STDOUT:   %a.ref: ref %i16 = name_ref a, %a
+// CHECK:STDOUT:   %addr: %ptr.251 = addr_of %a.ref
+// CHECK:STDOUT:   return
+// CHECK:STDOUT: }
+// CHECK:STDOUT:
 // CHECK:STDOUT: --- fail_todo_import_unsupported_primitive_type_param_function_decl.carbon
 // CHECK:STDOUT:
 // CHECK:STDOUT: constants {