diff options
Diffstat (limited to 'lib/Target/X86')
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp index ffe2083322..8a5464567f 100644 --- a/lib/Target/X86/X86InstrInfo.cpp +++ b/lib/Target/X86/X86InstrInfo.cpp @@ -1825,7 +1825,15 @@ X86InstrInfo::foldMemoryOperand(MachineInstr *MI, unsigned i, MI->getOperand(0).getReg() == MI->getOperand(1).getReg()) { OpcodeTablePtr = &RegOp2MemOpTable2Addr; isTwoAddrFold = true; + // Can't write back to CPI or a GV stub. + if (MOs[3].isCPI() || + (MOs[3].isGlobal() && isGVStub(MOs[3].getGlobal(), TM))) + return NULL; } else if (i == 0) { // If operand 0 + // Can't write back to CPI or a GV stub. + if (MOs[3].isCPI() || + (MOs[3].isGlobal() && isGVStub(MOs[3].getGlobal(), TM))) + return NULL; if (MI->getOpcode() == X86::MOV16r0) NewMI = MakeM0Inst(*this, X86::MOV16mi, MOs, MI); else if (MI->getOpcode() == X86::MOV32r0) |