From 727961a1a3507a8f7e47ba80a1e37fc68bfc8199 Mon Sep 17 00:00:00 2001
From: Bob Wilson <bob.wilson@apple.com>
Date: Mon, 14 Feb 2011 23:40:38 +0000
Subject: [PATCH] Remove unused bitvectors that record ARM callee-saved
 registers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125534 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMFrameLowering.cpp     |  6 ------
 lib/Target/ARM/ARMMachineFunctionInfo.h | 17 -----------------
 2 files changed, 23 deletions(-)

diff --git a/lib/Target/ARM/ARMFrameLowering.cpp b/lib/Target/ARM/ARMFrameLowering.cpp
index 70838f5d11c..f42c6db84fd 100644
--- a/lib/Target/ARM/ARMFrameLowering.cpp
+++ b/lib/Target/ARM/ARMFrameLowering.cpp
@@ -833,7 +833,6 @@ ARMFrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
     unsigned Reg = CSRegs[i];
     bool Spilled = false;
     if (MF.getRegInfo().isPhysRegUsed(Reg)) {
-      AFI->setCSRegisterIsSpilled(Reg);
       Spilled = true;
       CanEliminateFrame = false;
     } else {
@@ -932,7 +931,6 @@ ARMFrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
     // Spill LR as well so we can fold BX_RET to the registers restore (LDM).
     if (!LRSpilled && CS1Spilled) {
       MF.getRegInfo().setPhysRegUsed(ARM::LR);
-      AFI->setCSRegisterIsSpilled(ARM::LR);
       NumGPRSpills++;
       UnspilledCS1GPRs.erase(std::find(UnspilledCS1GPRs.begin(),
                                     UnspilledCS1GPRs.end(), (unsigned)ARM::LR));
@@ -957,7 +955,6 @@ ARMFrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
           if (!AFI->isThumb1OnlyFunction() ||
               isARMLowRegister(Reg) || Reg == ARM::LR) {
             MF.getRegInfo().setPhysRegUsed(Reg);
-            AFI->setCSRegisterIsSpilled(Reg);
             if (!RegInfo->isReservedReg(MF, Reg))
               ExtraCSSpill = true;
             break;
@@ -966,7 +963,6 @@ ARMFrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
       } else if (!UnspilledCS2GPRs.empty() && !AFI->isThumb1OnlyFunction()) {
         unsigned Reg = UnspilledCS2GPRs.front();
         MF.getRegInfo().setPhysRegUsed(Reg);
-        AFI->setCSRegisterIsSpilled(Reg);
         if (!RegInfo->isReservedReg(MF, Reg))
           ExtraCSSpill = true;
       }
@@ -1006,7 +1002,6 @@ ARMFrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
       if (Extras.size() && NumExtras == 0) {
         for (unsigned i = 0, e = Extras.size(); i != e; ++i) {
           MF.getRegInfo().setPhysRegUsed(Extras[i]);
-          AFI->setCSRegisterIsSpilled(Extras[i]);
         }
       } else if (!AFI->isThumb1OnlyFunction()) {
         // note: Thumb1 functions spill to R12, not the stack.  Reserve a slot
@@ -1021,7 +1016,6 @@ ARMFrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
 
   if (ForceLRSpill) {
     MF.getRegInfo().setPhysRegUsed(ARM::LR);
-    AFI->setCSRegisterIsSpilled(ARM::LR);
     AFI->setLRIsSpilledForFarJump(true);
   }
 }
diff --git a/lib/Target/ARM/ARMMachineFunctionInfo.h b/lib/Target/ARM/ARMMachineFunctionInfo.h
index af8f812159e..138f0c26227 100644
--- a/lib/Target/ARM/ARMMachineFunctionInfo.h
+++ b/lib/Target/ARM/ARMMachineFunctionInfo.h
@@ -79,10 +79,6 @@ class ARMFunctionInfo : public MachineFunctionInfo {
   BitVector GPRCS2Frames;
   BitVector DPRCSFrames;
 
-  /// SpilledCSRegs - A BitVector mask of all spilled callee-saved registers.
-  ///
-  BitVector SpilledCSRegs;
-
   /// JumpTableUId - Unique id for jumptables.
   ///
   unsigned JumpTableUId;
@@ -119,7 +115,6 @@ public:
     FramePtrSpillOffset(0), GPRCS1Offset(0), GPRCS2Offset(0), DPRCSOffset(0),
     GPRCS1Size(0), GPRCS2Size(0), DPRCSSize(0),
     GPRCS1Frames(32), GPRCS2Frames(32), DPRCSFrames(32),
-    SpilledCSRegs(MF.getTarget().getRegisterInfo()->getNumRegs()),
     JumpTableUId(0), PICLabelUId(0),
     VarArgsFrameIndex(0), HasITBlocks(false) {}
 
@@ -211,18 +206,6 @@ public:
     }
   }
 
-  void setCSRegisterIsSpilled(unsigned Reg) {
-    SpilledCSRegs.set(Reg);
-  }
-
-  bool isCSRegisterSpilled(unsigned Reg) const {
-    return SpilledCSRegs[Reg];
-  }
-
-  const BitVector &getSpilledCSRegisters() const {
-    return SpilledCSRegs;
-  }
-
   unsigned createJumpTableUId() {
     return JumpTableUId++;
   }