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In MipsISelDAGToDAG.cpp, store the global base register to a stack frame object.

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Long-branches need access to the global base register to get the destination
address.

llvm-svn: 158428
This commit is contained in:
Akira Hatanaka 2012-06-14 01:16:15 +00:00
parent 2784db9e87
commit afa4622baf
1 changed files with 10 additions and 3 deletions
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13
lib/Target/Mips/MipsISelDAGToDAG.cpp
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@ -117,15 +117,15 @@ private:
void MipsDAGToDAGISel::InitGlobalBaseReg(MachineFunction &MF) {
MipsFunctionInfo *MipsFI = MF.getInfo<MipsFunctionInfo>();
if (!MipsFI->globalBaseRegSet())
return;
MachineBasicBlock &MBB = MF.front();
MachineBasicBlock::iterator I = MBB.begin();
MachineRegisterInfo &RegInfo = MF.getRegInfo();
const MipsRegisterInfo *TargetRegInfo = TM.getRegisterInfo();
const MipsInstrInfo *MII = TM.getInstrInfo();
const TargetInstrInfo &TII = *MF.getTarget().getInstrInfo();
DebugLoc DL = I != MBB.end() ? I->getDebugLoc() : DebugLoc();
unsigned V0, V1, GlobalBaseReg = MipsFI->getGlobalBaseReg();
int FI = MipsFI->initGlobalRegFI();
const TargetRegisterClass *RC = Subtarget.isABI_N64() ?
(const TargetRegisterClass*)&Mips::CPU64RegsRegClass :
@ -147,6 +147,8 @@ void MipsDAGToDAGISel::InitGlobalBaseReg(MachineFunction &MF) {
BuildMI(MBB, I, DL, TII.get(Mips::DADDu), V1).addReg(V0).addReg(Mips::T9_64);
BuildMI(MBB, I, DL, TII.get(Mips::DADDiu), GlobalBaseReg).addReg(V1)
.addGlobalAddress(FName, 0, MipsII::MO_GPOFF_LO);
MII->storeRegToStackSlot(MBB, I, GlobalBaseReg, false, FI, RC,
TargetRegInfo);
return;
}
@ -159,6 +161,8 @@ void MipsDAGToDAGISel::InitGlobalBaseReg(MachineFunction &MF) {
.addExternalSymbol("__gnu_local_gp", MipsII::MO_ABS_HI);
BuildMI(MBB, I, DL, TII.get(Mips::ADDiu), GlobalBaseReg).addReg(V0)
.addExternalSymbol("__gnu_local_gp", MipsII::MO_ABS_LO);
MII->storeRegToStackSlot(MBB, I, GlobalBaseReg, false, FI, RC,
TargetRegInfo);
return;
}
@ -175,6 +179,8 @@ void MipsDAGToDAGISel::InitGlobalBaseReg(MachineFunction &MF) {
BuildMI(MBB, I, DL, TII.get(Mips::ADDu), V1).addReg(V0).addReg(Mips::T9);
BuildMI(MBB, I, DL, TII.get(Mips::ADDiu), GlobalBaseReg).addReg(V1)
.addGlobalAddress(FName, 0, MipsII::MO_GPOFF_LO);
MII->storeRegToStackSlot(MBB, I, GlobalBaseReg, false, FI, RC,
TargetRegInfo);
return;
}
@ -201,6 +207,7 @@ void MipsDAGToDAGISel::InitGlobalBaseReg(MachineFunction &MF) {
MBB.addLiveIn(Mips::V0);
BuildMI(MBB, I, DL, TII.get(Mips::ADDu), GlobalBaseReg)
.addReg(Mips::V0).addReg(Mips::T9);
MII->storeRegToStackSlot(MBB, I, GlobalBaseReg, false, FI, RC, TargetRegInfo);
}
bool MipsDAGToDAGISel::ReplaceUsesWithZeroReg(MachineRegisterInfo *MRI,