diff options
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp index 4ee0c0af83..7d973ea89d 100644 --- a/lib/Target/X86/X86InstrInfo.cpp +++ b/lib/Target/X86/X86InstrInfo.cpp @@ -2410,6 +2410,11 @@ MachineInstr* X86InstrInfo::foldMemoryOperandImpl(MachineFunction &MF, } else if (Ops.size() != 1) return NULL; + // Make sure the subregisters match. + // Otherwise we risk changing the size of the load. + if (LoadMI->getOperand(0).getSubReg() != MI->getOperand(Ops[0]).getSubReg()) + return NULL; + SmallVector<MachineOperand,X86::AddrNumOperands> MOs; switch (LoadMI->getOpcode()) { case X86::V_SET0PS: |