diff options
Diffstat (limited to 'lib/Target')
| -rw-r--r-- | lib/Target/ARM/ARMBaseInstrInfo.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp index 56f911a..9991531 100644 --- a/lib/Target/ARM/ARMBaseInstrInfo.cpp +++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp @@ -1455,7 +1455,8 @@ OptimizeCompareInstr(MachineInstr *CmpInstr, unsigned SrcReg, int CmpMask, // Check that CPSR isn't set between the comparison instruction and the one we // want to change. - MachineBasicBlock::const_iterator I = CmpInstr, E = MI; + MachineBasicBlock::const_iterator I = CmpInstr, E = MI, + B = MI->getParent()->begin(); --I; for (; I != E; --I) { const MachineInstr &Instr = *I; @@ -1469,6 +1470,10 @@ OptimizeCompareInstr(MachineInstr *CmpInstr, unsigned SrcReg, int CmpMask, if (MO.getReg() == ARM::CPSR) return false; } + + if (I == B) + // The 'and' is below the comparison instruction. + return false; } // Set the "zero" bit in CPSR. |