diff options
Diffstat (limited to 'lib/CodeGen/TwoAddressInstructionPass.cpp')
| -rw-r--r-- | lib/CodeGen/TwoAddressInstructionPass.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp index 8164690e40..5218aa1f7a 100644 --- a/lib/CodeGen/TwoAddressInstructionPass.cpp +++ b/lib/CodeGen/TwoAddressInstructionPass.cpp @@ -1555,6 +1555,12 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) { MO.setIsKill(false); RemovedKillFlag = true; } + + // Make sure regA is a legal regclass for the SrcIdx operand. + if (TargetRegisterInfo::isVirtualRegister(regA) && + TargetRegisterInfo::isVirtualRegister(regB)) + MRI->constrainRegClass(regA, MRI->getRegClass(regB)); + MO.setReg(regA); if (isCopy) |