Reapply r112623. Included additional check for unused byval argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112659 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/FunctionLoweringInfo.h b/include/llvm/CodeGen/FunctionLoweringInfo.h
index c49d1edb20..f17fe5a146 100644
--- a/include/llvm/CodeGen/FunctionLoweringInfo.h
+++ b/include/llvm/CodeGen/FunctionLoweringInfo.h
@@ -77,6 +77,9 @@ public:
   /// anywhere in the function.
   DenseMap<const AllocaInst*, int> StaticAllocaMap;
 
+  /// ByValArgFrameIndexMap - Keep track of frame indices for byval arguments.
+  DenseMap<const Argument*, int> ByValArgFrameIndexMap;
+
   /// ArgDbgValues - A list of DBG_VALUE instructions created during isel for
   /// function arguments that are inserted after scheduling is completed.
   SmallVector<MachineInstr*, 8> ArgDbgValues;
@@ -138,6 +141,13 @@ public:
     assert(R == 0 && "Already initialized this value register!");
     return R = CreateRegs(V->getType());
   }
+
+  /// setByValArgumentFrameIndex - Record frame index for the byval
+  /// argument.
+  void setByValArgumentFrameIndex(const Argument *A, int FI);
+  
+  /// getByValArgumentFrameIndex - Get frame index for the byval argument.
+  int getByValArgumentFrameIndex(const Argument *A);
 };
 
 /// AddCatchInfo - Extract the personality and type infos from an eh.selector