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Simplify check that optional def is there and is CPSR. 

llvm-svn: 141602
This commit is contained in:
Bill Wendling 2011-10-11 00:10:41 +00:00
parent 60b2b2ee0d
commit 98703350d0
1 changed files with 4 additions and 5 deletions
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9
llvm/lib/Target/ARM/Thumb2ITBlockPass.cpp
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@ -140,11 +140,10 @@ Thumb2ITBlockPass::MoveCopyOutOfITBlock(MachineInstr *MI,
// rsb r1, 0
// rsb r2, 0
//
//
for (unsigned I = 0, E = MI->getNumOperands(); I != E; ++I)
if (MI->getOperand(I).isReg() && MI->getOperand(I).getReg() == ARM::CPSR &&
MI->getOperand(I).isDef())
return false;
const MCInstrDesc &MCID = MI->getDesc();
if (MCID.hasOptionalDef() &&
MI->getOperand(MCID.getNumOperands() - 1).getReg() == ARM::CPSR)
return false;
// Then peek at the next instruction to see if it's predicated on CC or OCC.
// If not, then there is nothing to be gained by moving the copy.