diff options
Diffstat (limited to 'lib/CodeGen/RegAllocFast.cpp')
| -rw-r--r-- | lib/CodeGen/RegAllocFast.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/RegAllocFast.cpp b/lib/CodeGen/RegAllocFast.cpp index 7eafbc8475..ab5e1032e1 100644 --- a/lib/CodeGen/RegAllocFast.cpp +++ b/lib/CodeGen/RegAllocFast.cpp @@ -583,7 +583,8 @@ void RAFast::AllocateBasicBlock(MachineBasicBlock &MBB) { unsigned SrcCopyPhysReg = 0U; bool isCopy = TII->isMoveInstr(*MI, SrcCopyReg, DstCopyReg, SrcCopySubReg, DstCopySubReg); - if (isCopy && TargetRegisterInfo::isVirtualRegister(SrcCopyReg)) + if (isCopy && SrcCopySubReg == 0 && DstCopySubReg == 0 && + TargetRegisterInfo::isVirtualRegister(SrcCopyReg)) SrcCopyPhysReg = getVirt2PhysRegMapSlot(SrcCopyReg); // Loop over the implicit uses, making sure they don't get reallocated. |