Backing out Jim's LR spill changes. This was causing llvm-gcc bootstrapping

to infinite loop:
PPCMachineFunctionInfo.h updated: 1.2 -> 1.3
PPCRegisterInfo.cpp updated: 1.110 -> 1.111
PPCRegisterInfo.h updated: 1.28 -> 1.29


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34652 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 11 deletions

diff --git a/lib/Target/PowerPC/PPCRegisterInfo.cpp b/lib/Target/PowerPC/PPCRegisterInfo.cpp
index b600c17f3a..a765f33489 100644
--- a/lib/Target/PowerPC/PPCRegisterInfo.cpp
+++ b/lib/Target/PowerPC/PPCRegisterInfo.cpp
@@ -538,8 +538,8 @@ bool PPCRegisterInfo::hasFP(const MachineFunction &MF) const {
 /// usesLR - Returns if the link registers (LR) has been used in the function.
 ///
 bool PPCRegisterInfo::usesLR(MachineFunction &MF) const {
-  PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
-  return FI->usesLR();
+  const bool *PhysRegsUsed = MF.getUsedPhysregs();
+  return PhysRegsUsed[getRARegister()];
 }
 
 void PPCRegisterInfo::
@@ -874,15 +874,6 @@ void PPCRegisterInfo::determineFrameLayout(MachineFunction &MF) const {
   MFI->setStackSize(FrameSize);
 }
 
-void PPCRegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF)
-  const {
-  //  Save and clear the LR state.
-  PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
-  unsigned LR = getRARegister();
-  FI->setUsesLR(MF.isPhysRegUsed(LR));
-  MF.changePhyRegUsed(LR, false);
-}
-
 void PPCRegisterInfo::emitPrologue(MachineFunction &MF) const {
   MachineBasicBlock &MBB = MF.front();   // Prolog goes in entry BB
   MachineBasicBlock::iterator MBBI = MBB.begin();