diff options
Diffstat (limited to 'llvm/lib/Target/SystemZ/SystemZElimCompare.cpp')
| -rw-r--r-- | llvm/lib/Target/SystemZ/SystemZElimCompare.cpp | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/llvm/lib/Target/SystemZ/SystemZElimCompare.cpp b/llvm/lib/Target/SystemZ/SystemZElimCompare.cpp index d26e40b4791..ada17fc6308 100644 --- a/llvm/lib/Target/SystemZ/SystemZElimCompare.cpp +++ b/llvm/lib/Target/SystemZ/SystemZElimCompare.cpp @@ -104,14 +104,12 @@ static bool isCCLiveOut(MachineBasicBlock &MBB) { return false; } -// Return true if any CC result of MI would reflect the value of subreg -// SubReg of Reg. -static bool resultTests(MachineInstr *MI, unsigned Reg, unsigned SubReg) { +// Return true if any CC result of MI would reflect the value of Reg. +static bool resultTests(MachineInstr *MI, unsigned Reg) { if (MI->getNumOperands() > 0 && MI->getOperand(0).isReg() && MI->getOperand(0).isDef() && - MI->getOperand(0).getReg() == Reg && - MI->getOperand(0).getSubReg() == SubReg) + MI->getOperand(0).getReg() == Reg) return true; switch (MI->getOpcode()) { @@ -127,8 +125,7 @@ static bool resultTests(MachineInstr *MI, unsigned Reg, unsigned SubReg) { case SystemZ::LTEBR: case SystemZ::LTDBR: case SystemZ::LTXBR: - if (MI->getOperand(1).getReg() == Reg && - MI->getOperand(1).getSubReg() == SubReg) + if (MI->getOperand(1).getReg() == Reg) return true; } @@ -326,7 +323,6 @@ optimizeCompareZero(MachineInstr *Compare, // Search back for CC results that are based on the first operand. unsigned SrcReg = Compare->getOperand(0).getReg(); - unsigned SrcSubReg = Compare->getOperand(0).getSubReg(); MachineBasicBlock &MBB = *Compare->getParent(); MachineBasicBlock::iterator MBBI = Compare, MBBE = MBB.begin(); Reference CCRefs; @@ -334,7 +330,7 @@ optimizeCompareZero(MachineInstr *Compare, while (MBBI != MBBE) { --MBBI; MachineInstr *MI = MBBI; - if (resultTests(MI, SrcReg, SrcSubReg)) { + if (resultTests(MI, SrcReg)) { // Try to remove both MI and Compare by converting a branch to BRCT(G). // We don't care in this case whether CC is modified between MI and // Compare. |
