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For Thumb mode, we need to use a constant pool if the value is too large to be

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used with the CMP instruction.

llvm-svn: 142458
This commit is contained in:
Bill Wendling 2011-10-18 23:11:05 +00:00
parent 548842dbed
commit 72d4e0a695
1 changed files with 20 additions and 3 deletions
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23
lib/Target/ARM/ARMISelLowering.cpp
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@ -5809,9 +5809,26 @@ EmitSjLjDispatchBlock(MachineInstr *MI, MachineBasicBlock *MBB) const {
.addImm(1)
.addMemOperand(FIMMOLd));
AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPi8))
.addReg(NewVReg1)
.addImm(LPadList.size()));
if (NumLPads < 256) {
AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPi8))
.addReg(NewVReg1)
.addImm(NumLPads));
} else {
MachineConstantPool *ConstantPool = MF->getConstantPool();
const Constant *C =
ConstantInt::get(Type::getInt32Ty(MF->getFunction()->getContext()),
NumLPads);
unsigned Idx = ConstantPool->getConstantPoolIndex(C, 4);
unsigned VReg1 = MRI->createVirtualRegister(TRC);
AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tLDRpci))
.addReg(VReg1, RegState::Define)
.addConstantPoolIndex(Idx));
AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPr))
.addReg(NewVReg1)
.addReg(VReg1));
}
BuildMI(DispatchBB, dl, TII->get(ARM::tBcc))
.addMBB(TrapBB)
.addImm(ARMCC::HI)