[clang] 6cf64b2 - [clang] [MinGW] Default to DWARF 4

[Martin Storsjö via cfe-commits]

Author: Martin Storsjö
Date: 2022-02-10T10:59:05+02:00
New Revision: 6cf64b2d2858dc93c3ec93438bdaca2807847e9b

URL: https://github.com/llvm/llvm-project/commit/6cf64b2d2858dc93c3ec93438bdaca2807847e9b
DIFF: https://github.com/llvm/llvm-project/commit/6cf64b2d2858dc93c3ec93438bdaca2807847e9b.diff

LOG: [clang] [MinGW] Default to DWARF 4

Neither LLDB nor GDB seem to work with DWARF 5 debug information on
Windows right now.

This applies the same change as in
9c6272861032f511a23784ce0c5cc8f6ac2f625b (Default to DWARFv4 on Windows)
to the MinGW driver too.

Differential Revision: https://reviews.llvm.org/D119326

Added: 
    

Modified: 
    clang/lib/Driver/ToolChains/MinGW.h
    clang/test/CodeGen/dwarf-version.c

Removed: 
    


################################################################################
diff  --git a/clang/lib/Driver/ToolChains/MinGW.h b/clang/lib/Driver/ToolChains/MinGW.h
index c3de19b977246..c9553b4f46520 100644
--- a/clang/lib/Driver/ToolChains/MinGW.h
+++ b/clang/lib/Driver/ToolChains/MinGW.h
@@ -90,6 +90,8 @@ class LLVM_LIBRARY_VISIBILITY MinGW : public ToolChain {
 
   void printVerboseInfo(raw_ostream &OS) const override;
 
+  unsigned GetDefaultDwarfVersion() const override { return 4; }
+
 protected:
   Tool *getTool(Action::ActionClass AC) const override;
   Tool *buildLinker() const override;

diff  --git a/clang/test/CodeGen/dwarf-version.c b/clang/test/CodeGen/dwarf-version.c
index 47025e241d13c..0a6fa4768026d 100644
--- a/clang/test/CodeGen/dwarf-version.c
+++ b/clang/test/CodeGen/dwarf-version.c
@@ -32,6 +32,11 @@
 //     Explicitly request both.
 // RUN: %clang -target i686-pc-windows-msvc -gdwarf -gcodeview -S -emit-llvm -o - %s \
 // RUN:     | FileCheck %s --check-prefixes=VER4,CODEVIEW
+
+// Check what version of dwarf is used for MinGW targets.
+// RUN: %clang -target i686-pc-windows-gnu -g -S -emit-llvm -o - %s | \
+// RUN:   FileCheck %s --check-prefixes=VER4
+
 // RUN: %clang -target powerpc-ibm-aix-xcoff -g -S -emit-llvm -o - %s | \
 // RUN:   FileCheck %s --check-prefix=VER3
 // RUN: %clang -target powerpc-ibm-aix-xcoff -gdwarf-2 -S -emit-llvm -o - %s | \