From 85f3a0a4c4c1953a06ea463c6b5d6b88d62b58b4 Mon Sep 17 00:00:00 2001 From: Bill Wendling Date: Tue, 18 Oct 2011 22:52:20 +0000 Subject: Use the integer compare when the value is small enough. Use the "move into a 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 --- lib/Target/ARM/ARMISelLowering.cpp | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) (limited to 'lib/Target/ARM/ARMISelLowering.cpp') diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index 759d3b6e0d..236ea6f90a 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -5672,9 +5672,7 @@ EmitSjLjDispatchBlock(MachineInstr *MI, MachineBasicBlock *MBB) const { MachineRegisterInfo *MRI = &MF->getRegInfo(); ARMFunctionInfo *AFI = MF->getInfo(); 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())); -- cgit v1.2.3