gdb uses DW_AT_prototyped to identify K&R style in C based languages.

This fixes objc.dg/dwarf-prototypes.m scan-assembler DW_AT_prototyped from llvmgcc42 test suite.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65357 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
index 6121d4bfa66428a4f5a76f044ce0ff4b296ed651..26973b1cb15d24798113fea0e7c11a7bca3d2b12 100644 (file)
--- a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
@@ -1942,6 +1942,11 @@ private:
         }
     }
 
+    unsigned Lang = SP.getCompileUnit().getLanguage();
+    if (Lang == DW_LANG_C99 || Lang == DW_LANG_C89 
+        || Lang == DW_LANG_ObjC)
+      AddUInt(SPDie, DW_AT_prototyped, DW_FORM_flag, 1);
+
     if (!SP.isLocalToUnit())
       AddUInt(SPDie, DW_AT_external, DW_FORM_flag, 1);
     return SPDie;