Try to not lose variable's debug info during instcombine.

This is done by lowering dbg.declare intrinsic into dbg.value intrinsic.
Radar 9143931.

llvm-svn: 127834

1 files changed, 5 insertions, 0 deletions

diff --git a/llvm/include/llvm/Transforms/Utils/Local.h b/llvm/include/llvm/Transforms/Utils/Local.h
index 8f97428649b..16bcc545033 100644
--- a/llvm/include/llvm/Transforms/Utils/Local.h
+++ b/llvm/include/llvm/Transforms/Utils/Local.h
@@ -19,6 +19,7 @@ namespace llvm {
 
 class User;
 class BasicBlock;
+class Function;
 class BranchInst;
 class Instruction;
 class DbgDeclareInst;
@@ -169,6 +170,10 @@ static inline unsigned getKnownAlignment(Value *V, const TargetData *TD = 0) {
 bool ConvertDebugDeclareToDebugValue(DbgDeclareInst *DDI,
                                      StoreInst *SI, DIBuilder &Builder);
 
+/// LowerDbgDeclare - Lowers llvm.dbg.declare intrinsics into appropriate set
+/// of llvm.dbg.value intrinsics.
+bool LowerDbgDeclare(Function &F);
+
 } // End llvm namespace
 
 #endif