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Lower CppOverloadSetValue (#6101)

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Following up on comments from
[#5891](https://github.com/carbon-language/carbon-lang/pull/5891) ([
1](https://github.com/carbon-language/carbon-lang/pull/5891#discussion_r2317244981),
[2](https://github.com/carbon-language/carbon-lang/pull/5891#discussion_r2317266756)).

Lowering `CppOverloadSetValue` as an empty struct value, using
`context.GetLiteralAsValue()`. Also changed its constant kind to
`InstConstantKind::Always`.

Part of https://github.com/carbon-language/carbon-lang/issues/5915
This commit is contained in:
Ivana Ivanovska
2025-10-01 16:25:05 +00:00
committed by GitHub
parent 4a6376cf59
commit a24598f069
40 changed files with 838 additions and 698 deletions
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toolchain/check/testdata/interop/cpp/cpp_namespace.carbon
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+3 -3
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@@ -144,7 +144,7 @@ fn F() {
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %.98d: type = cpp_overload_set_type @system_function [concrete]
// CHECK:STDOUT: %empty_struct: %.98d = struct_value () [concrete]
// CHECK:STDOUT: %.769: %.98d = cpp_overload_set_value @system_function [concrete]
// CHECK:STDOUT: %system_function.type: type = fn_type @system_function [concrete]
// CHECK:STDOUT: %system_function: %system_function.type = struct_value () [concrete]
// CHECK:STDOUT: }
@@ -154,7 +154,7 @@ fn F() {
// CHECK:STDOUT: .system_function = %.769
// CHECK:STDOUT: import Cpp//...
// CHECK:STDOUT: }
// CHECK:STDOUT: %.769: %.98d = cpp_overload_set_value @system_function [concrete = constants.%empty_struct]
// CHECK:STDOUT: %.769: %.98d = cpp_overload_set_value @system_function [concrete = constants.%.769]
// CHECK:STDOUT: %system_function.decl: %system_function.type = fn_decl @system_function [concrete = constants.%system_function] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
@@ -167,7 +167,7 @@ fn F() {
// CHECK:STDOUT: fn @F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: %system_function.ref: %.98d = name_ref system_function, imports.%.769 [concrete = constants.%empty_struct]
// CHECK:STDOUT: %system_function.ref: %.98d = name_ref system_function, imports.%.769 [concrete = constants.%.769]
// CHECK:STDOUT: %system_function.call: init %empty_tuple.type = call imports.%system_function.decl()
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }