Implement function prefix data as an IR feature.

[oota-llvm.git] / lib / IR / LLVMContextImpl.h

diff --git a/lib/IR/LLVMContextImpl.h b/lib/IR/LLVMContextImpl.h
index 0c659b81b706dbb717cef741f47eefdfe8ee51f5..407b9856892ade3d8e8246a82f0a7d5524016ef0 100644 (file)
--- a/lib/IR/LLVMContextImpl.h
+++ b/lib/IR/LLVMContextImpl.h
@@ -355,6 +355,11 @@ public:
   typedef DenseMap<const Function*, unsigned> IntrinsicIDCacheTy;
   IntrinsicIDCacheTy IntrinsicIDCache;
 
+  /// \brief Mapping from a function to its prefix data, which is stored as the
+  /// operand of an unparented ReturnInst so that the prefix data has a Use.
+  typedef DenseMap<const Function *, ReturnInst *> PrefixDataMapTy;
+  PrefixDataMapTy PrefixDataMap;
+
   int getOrAddScopeRecordIdxEntry(MDNode *N, int ExistingIdx);
   int getOrAddScopeInlinedAtIdxEntry(MDNode *Scope, MDNode *IA,int ExistingIdx);