[PATCH] D99250: [DebugInfo] Fix the mismatching of C++ language tags and Dwarf versions.

[EsmeYi via Phabricator via cfe-commits]

Esme updated this revision to Diff 334057.
Esme added a comment.

Addressed Zheng's comments.
Thank you all for your comments. 
Since no DWARF consumers has dialect-specific behavior, the patch will proceed.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D99250/new/

https://reviews.llvm.org/D99250

Files:
  clang/lib/CodeGen/CGDebugInfo.cpp
  clang/test/CodeGenCXX/debug-info-programming-language.cpp
  clang/test/Modules/ModuleDebugInfo.cpp


Index: clang/test/Modules/ModuleDebugInfo.cpp
===================================================================
--- clang/test/Modules/ModuleDebugInfo.cpp
+++ clang/test/Modules/ModuleDebugInfo.cpp
@@ -23,7 +23,7 @@
 // CHECK-MOD: distinct !DICompileUnit(language: DW_LANG_{{.*}}C_plus_plus,
 
 // CHECK: distinct !DICompileUnit(language: DW_LANG_{{.*}}C_plus_plus,
-// CHECK-CXX: distinct !DICompileUnit(language: DW_LANG_C_plus_plus_11,
+// CHECK-CXX: distinct !DICompileUnit(language: DW_LANG_C_plus_plus,
 // CHECK-SAME:                    isOptimized: false,
 // CHECK-NOT:                     splitDebugFilename:
 // CHECK-SAME:                    dwoId:
Index: clang/test/CodeGenCXX/debug-info-programming-language.cpp
===================================================================
--- clang/test/CodeGenCXX/debug-info-programming-language.cpp
+++ clang/test/CodeGenCXX/debug-info-programming-language.cpp
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -dwarf-version=5  -emit-llvm -triple %itanium_abi_triple %s -o - \
+// RUN:   -x c++ -std=c++14 -O0 -disable-llvm-passes -debug-info-kind=limited \
+// RUN: | FileCheck --check-prefix=CHECK-DWARF5 %s
+// RUN: %clang_cc1 -dwarf-version=3  -emit-llvm -triple %itanium_abi_triple %s -o - \
+// RUN:   -x c++ -std=c++14 -O0 -disable-llvm-passes -debug-info-kind=limited \
+// RUN: | FileCheck --check-prefix=CHECK-DWARF3 %s
+
+int main() {
+  return 0;
+}
+
+// CHECK-DWARF5: distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14,
+// CHECK-DWARF3: distinct !DICompileUnit(language: DW_LANG_C_plus_plus,
Index: clang/lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- clang/lib/CodeGen/CGDebugInfo.cpp
+++ clang/lib/CodeGen/CGDebugInfo.cpp
@@ -567,9 +567,9 @@
   if (LO.CPlusPlus) {
     if (LO.ObjC)
       LangTag = llvm::dwarf::DW_LANG_ObjC_plus_plus;
-    else if (LO.CPlusPlus14)
+    else if (LO.CPlusPlus14 && CGM.getCodeGenOpts().DwarfVersion >= 5)
       LangTag = llvm::dwarf::DW_LANG_C_plus_plus_14;
-    else if (LO.CPlusPlus11)
+    else if (LO.CPlusPlus11 && CGM.getCodeGenOpts().DwarfVersion >= 5)
       LangTag = llvm::dwarf::DW_LANG_C_plus_plus_11;
     else
       LangTag = llvm::dwarf::DW_LANG_C_plus_plus;


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