[Myriad]: default the Dwarf version to 2

llvm-svn: 249692

clang/lib/Driver/ToolChains.h

@@ -981,6 +981,7 @@ public:
   Tool *SelectTool(const JobAction &JA) const override;
   void getCompilerSupportDir(std::string &Dir) const;
   void getBuiltinLibDir(std::string &Dir) const;
+  unsigned GetDefaultDwarfVersion() const override { return 2; }
 
 protected:
   Tool *buildLinker() const override;

clang/test/Driver/myriad-toolchain.c

@@ -57,3 +57,6 @@
 // RUN: %clang -target sparc-myriad -### -nostdlib %s 2>&1 | FileCheck %s --check-prefix=NOSTDLIB
 //
 // NOSTDLIB-NOT: "-lc"
+
+// RUN: %clang -### -c -g %s -target sparc-myriad 2>&1 | FileCheck -check-prefix=G_SPARC %s
+// G_SPARC: "-debug-info-kind=limited" "-dwarf-version=2"