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[Clang][Driver] Expose -fno-eliminate-unused-debug-types to clang-cl #95259

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Merged
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Jun 15, 2024
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[Clang][Driver] Expose -fno-eliminate-unused-debug-types to clang-cl #95259

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3 changes: 3 additions & 0 deletions clang/docs/UsersManual.rst
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Expand Up @@ -3338,6 +3338,9 @@ below. If multiple flags are present, the last one is used.
By default, Clang does not emit type information for types that are defined
but not used in a program. To retain the debug info for these unused types,
the negation **-fno-eliminate-unused-debug-types** can be used.
This can be particulary useful on Windows, when using NATVIS files that
can reference const symbols that would otherwise be stripped, even in full
debug or standalone debug modes.

Controlling Macro Debug Info Generation
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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2 changes: 1 addition & 1 deletion clang/include/clang/Driver/Options.td
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Expand Up @@ -2120,7 +2120,7 @@ def fno_elide_type : Flag<["-"], "fno-elide-type">, Group<f_Group>,
MarshallingInfoNegativeFlag<DiagnosticOpts<"ElideType">>;
def feliminate_unused_debug_symbols : Flag<["-"], "feliminate-unused-debug-symbols">, Group<f_Group>;
defm eliminate_unused_debug_types : OptOutCC1FFlag<"eliminate-unused-debug-types",
"Do not emit ", "Emit ", " debug info for defined but unused types">;
"Do not emit ", "Emit ", " debug info for defined but unused types", [ClangOption, CLOption]>;
def femit_all_decls : Flag<["-"], "femit-all-decls">, Group<f_Group>,
Visibility<[ClangOption, CC1Option]>,
HelpText<"Emit all declarations, even if unused">,
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2 changes: 2 additions & 0 deletions clang/test/Driver/cl-options.c
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Expand Up @@ -696,6 +696,8 @@
// RUN: -Wunused-variable \
// RUN: -fmacro-backtrace-limit=0 \
// RUN: -fstandalone-debug \
// RUN: -feliminate-unused-debug-types \
// RUN: -fno-eliminate-unused-debug-types \
// RUN: -flimit-debug-info \
// RUN: -flto \
// RUN: -fmerge-all-constants \
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