Support: Add string => unsigned mapping for DW_TAG

Add `dwarf::getTag()` to translate from `StringRef` to `unsigned`.

llvm-svn: 228031

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/Support/Dwarf.cpp b/llvm/lib/Support/Dwarf.cpp
index 255d3572365..80dfd102317 100644
--- a/llvm/lib/Support/Dwarf.cpp
+++ b/llvm/lib/Support/Dwarf.cpp
@@ -12,6 +12,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/Dwarf.h"
+#include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/ErrorHandling.h"
 
 using namespace llvm;
@@ -27,6 +28,13 @@ const char *llvm::dwarf::TagString(unsigned Tag) {
   }
 }
 
+unsigned llvm::dwarf::getTag(StringRef TagString) {
+  return StringSwitch<unsigned>(TagString)
+#define HANDLE_DW_TAG(ID, NAME) .Case("DW_TAG_" #NAME, DW_TAG_##NAME)
+#include "llvm/Support/Dwarf.def"
+      .Default(DW_TAG_invalid);
+}
+
 const char *llvm::dwarf::ChildrenString(unsigned Children) {
   switch (Children) {
   case DW_CHILDREN_no:                   return "DW_CHILDREN_no";