[PATCH] D140544: [DebugInfo] make DW_LANG_C11 respect -gstrict-dwarf

[ChenZheng via Phabricator via cfe-commits]

shchenz created this revision.
shchenz added reviewers: dblaikie, probinson, aprantl.
shchenz added a project: LLVM.
Herald added a project: All.
shchenz requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D140544

Files:
  clang/lib/CodeGen/CGDebugInfo.cpp
  clang/test/CodeGen/debug-info-programming-language.c


Index: clang/test/CodeGen/debug-info-programming-language.c
===================================================================
--- clang/test/CodeGen/debug-info-programming-language.c
+++ clang/test/CodeGen/debug-info-programming-language.c
@@ -4,7 +4,14 @@
 // RUN: %clang_cc1 -dwarf-version=3 -emit-llvm -triple %itanium_abi_triple %s -o - \
 // RUN:   -x c -std=c17 -O0 -disable-llvm-passes -debug-info-kind=limited \
 // RUN:   | FileCheck --check-prefix=CHECK-C17 %s
+// RUN: %clang_cc1 -dwarf-version=3 -emit-llvm -triple %itanium_abi_triple %s -o - \
+// RUN:   -x c -std=c11 -O0 -disable-llvm-passes -debug-info-kind=limited \
+// RUN:   -gstrict-dwarf | FileCheck --check-prefix=CHECK-STRICT %s
+// RUN: %clang_cc1 -dwarf-version=5 -emit-llvm -triple %itanium_abi_triple %s -o - \
+// RUN:   -x c -std=c11 -O0 -disable-llvm-passes -debug-info-kind=limited \
+// RUN:   -gstrict-dwarf | FileCheck --check-prefix=CHECK-C11 %s
 
+// CHECK-STRICT: !DICompileUnit(language: DW_LANG_C,
 // CHECK-C11: !DICompileUnit(language: DW_LANG_C11
 // Update this check once support for DW_LANG_C17 is broadly supported/known in
 // consumers. Maybe we'll skip this and go to the DWARFv6 language+version
Index: clang/lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- clang/lib/CodeGen/CGDebugInfo.cpp
+++ clang/lib/CodeGen/CGDebugInfo.cpp
@@ -579,7 +579,10 @@
   } else if (LO.RenderScript) {
     LangTag = llvm::dwarf::DW_LANG_GOOGLE_RenderScript;
   } else if (LO.C11) {
-    LangTag = llvm::dwarf::DW_LANG_C11;
+    if (CGO.DebugStrictDwarf && CGO.DwarfVersion < 5)
+      LangTag = llvm::dwarf::DW_LANG_C;
+    else
+      LangTag = llvm::dwarf::DW_LANG_C11;
   } else if (LO.C99) {
     LangTag = llvm::dwarf::DW_LANG_C99;
   } else {


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