DWARF type hashing: Handle multiple (including recursive) references to the same type

This uses a map, keeping the type DIE numbering separate from the DIEs
themselves - alternatively we could do things the way GCC does if we
want to add an integer to the DIE type to record the numbering there.

llvm-svn: 193105

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DIEHash.h b/llvm/lib/CodeGen/AsmPrinter/DIEHash.h
index ee753fea99c..f6650cc93e7 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DIEHash.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DIEHash.h
@@ -11,6 +11,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/ADT/DenseMap.h"
 #include "llvm/Support/MD5.h"
 
 namespace llvm {
@@ -125,5 +126,6 @@ private:
 
 private:
   MD5 Hash;
+  DenseMap<DIE*, unsigned> Numbering;
 };
 }