[DEBUGINFO] Disable emission of the dwarf sections, but allow directives.

Summary:
Added an option that allows to emit only '.loc' and '.file' kind debug
directives, but disables emission of the DWARF sections. Required for
NVPTX target to support profiling. It requires '.loc' and '.file'
directives, but does not require any DWARF sections for the profiler.

Reviewers: probinson, echristo, dblaikie

Subscribers: aprantl, JDevlieghere, llvm-commits

Differential Revision: https://reviews.llvm.org/D46021

llvm-svn: 338616

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/lib/IR/DebugInfoMetadata.cpp b/llvm/lib/IR/DebugInfoMetadata.cpp
index 910e8c2fb74..7908b254446 100644
--- a/llvm/lib/IR/DebugInfoMetadata.cpp
+++ b/llvm/lib/IR/DebugInfoMetadata.cpp
@@ -472,6 +472,7 @@ DICompileUnit::getEmissionKind(StringRef Str) {
       .Case("NoDebug", NoDebug)
       .Case("FullDebug", FullDebug)
       .Case("LineTablesOnly", LineTablesOnly)
+      .Case("DebugDirectivesOnly", DebugDirectivesOnly)
       .Default(None);
 }
 
@@ -480,6 +481,7 @@ const char *DICompileUnit::emissionKindString(DebugEmissionKind EK) {
   case NoDebug:        return "NoDebug";
   case FullDebug:      return "FullDebug";
   case LineTablesOnly: return "LineTablesOnly";
+  case DebugDirectivesOnly: return "DebugDirectviesOnly";
   }
   return nullptr;
 }