Do not replace operands of pseudo instructions with register $zero.

[oota-llvm.git] / lib / Target / MBlaze / MBlazeMachineFunction.h

diff --git a/lib/Target/MBlaze/MBlazeMachineFunction.h b/lib/Target/MBlaze/MBlazeMachineFunction.h
index 8340d921ba45dd6eac3b3862a55945ddc51990de..95cc5077cc162e2a9be156c5598257dd6d1e29f2 100644 (file)
--- a/lib/Target/MBlaze/MBlazeMachineFunction.h
+++ b/lib/Target/MBlaze/MBlazeMachineFunction.h
@@ -1,4 +1,4 @@
-//===-- MBlazeMachineFunctionInfo.h - Private data ----------------*- C++ -*-=//
+//===-- MBlazeMachineFunctionInfo.h - Private data --------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -14,8 +14,8 @@
 #ifndef MBLAZE_MACHINE_FUNCTION_INFO_H
 #define MBLAZE_MACHINE_FUNCTION_INFO_H
 
+#include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/VectorExtras.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 
@@ -24,8 +24,8 @@ namespace llvm {
 /// MBlazeFunctionInfo - This class is derived from MachineFunction private
 /// MBlaze target-specific information for each MachineFunction.
 class MBlazeFunctionInfo : public MachineFunctionInfo {
+  virtual void anchor();
 
-private:
   /// Holds for each function where on the stack the Frame Pointer must be
   /// saved. This is used on Prologue and Epilogue to emit FP save/restore
   int FPStackOffset;
@@ -63,6 +63,11 @@ private:
   SmallVector<MBlazeFIHolder, 4> FnStoreVarArgs;
   bool HasStoreVarArgs;
 
+  // When determining the final stack layout some of the frame indexes may
+  // be replaced by new frame indexes that reside in the caller's stack
+  // frame. The replacements are recorded in this structure.
+  DenseMap<int,int> FIReplacements;
+
   /// SRetReturnReg - Some subtargets require that sret lowering includes
   /// returning the value of the returned struct in a register. This field
   /// holds the virtual register into which the sret argument is passed.
@@ -115,6 +120,18 @@ public:
 
   const SmallVector<int, 16>& getLiveIn() const { return LiveInFI; }
 
+  void recordReplacement(int OFI, int NFI) {
+    FIReplacements.insert(std::make_pair(OFI,NFI));
+  }
+
+  bool hasReplacement(int OFI) const {
+    return FIReplacements.find(OFI) != FIReplacements.end();
+  }
+
+  int getReplacement(int OFI) const {
+    return FIReplacements.lookup(OFI);
+  }
+
   void recordLoadArgsFI(int FI, int SPOffset) {
     if (!HasLoadArgs) HasLoadArgs=true;
     FnLoadArgs.push_back(MBlazeFIHolder(FI, SPOffset));