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| author | Bill Wendling <isanbard@gmail.com> | 2011-10-18 23:11:05 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2011-10-18 23:11:05 +0000 |
| commit | a5871dc1044ff31906f3a2cfc639c7fcd0a14c76 (patch) | |
| tree | a6e8f522429ba555d50fdb820a64b393b9f5e45a | |
| parent | bf79f919417f450245c284db19125e76c969a84e (diff) | |
| download | external_llvm-a5871dc1044ff31906f3a2cfc639c7fcd0a14c76.zip external_llvm-a5871dc1044ff31906f3a2cfc639c7fcd0a14c76.tar.gz external_llvm-a5871dc1044ff31906f3a2cfc639c7fcd0a14c76.tar.bz2 | |
For Thumb mode, we need to use a constant pool if the value is too large to be
used with the CMP instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142458 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index 236ea6f..9cc1d33 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -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) |