6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-04-05 01:31:05 +00:00
Code Issues Projects Releases Wiki Activity

Use the integer compare when the value is small enough. Use the "move into a

Browse Source 
register and then compare against that" method when it's too large. We have to
move the value into the register in the "movw, movt" pair of instructions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142440 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-10-18 22:52:20 +00:00
parent 7e8ae57be9
commit 85f3a0a4c4
1 changed files with 17 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
lib/Target/ARM/ARMISelLowering.cpp
View File

@ -5672,9 +5672,7 @@ EmitSjLjDispatchBlock(MachineInstr *MI, MachineBasicBlock *MBB) const {
MachineRegisterInfo *MRI = &MF->getRegInfo();
ARMFunctionInfo *AFI = MF->getInfo<ARMFunctionInfo>();
MachineFrameInfo *MFI = MF->getFrameInfo();
MachineConstantPool *MCP = MF->getConstantPool();
int FI = MFI->getFunctionContextIndex();
const Function *F = MF->getFunction();
const TargetRegisterClass *TRC =
Subtarget->isThumb() ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
@ -5863,6 +5861,23 @@ EmitSjLjDispatchBlock(MachineInstr *MI, MachineBasicBlock *MBB) const {
.addImm(4)
.addMemOperand(FIMMOLd));
if (NumLPads < 256) {
AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPri))
.addReg(NewVReg1)
.addImm(NumLPads));
} else {
unsigned VReg1 = MRI->createVirtualRegister(TRC);
AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVi16), VReg1)
.addImm(NumLPads & 0xFF));
unsigned VReg2 = MRI->createVirtualRegister(TRC);
AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVTi16), VReg2)
.addReg(VReg1)
.addImm(NumLPads >> 16));
AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr))
.addReg(NewVReg1)
.addReg(VReg2));
}
unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVi16), NewVReg2)
.addImm(LPadList.size()));