diff options
Diffstat (limited to 'llvm/lib/CodeGen/MachineCopyPropagation.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineCopyPropagation.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/MachineCopyPropagation.cpp b/llvm/lib/CodeGen/MachineCopyPropagation.cpp index 4c1717e1ec3..8b6777f06db 100644 --- a/llvm/lib/CodeGen/MachineCopyPropagation.cpp +++ b/llvm/lib/CodeGen/MachineCopyPropagation.cpp @@ -399,7 +399,9 @@ void MachineCopyPropagation::CopyPropagateBlock(MachineBasicBlock &MBB) { MachineInstr *MI = &*I; ++I; - if (MI->isCopy()) { + // Analyze copies (which don't overlap themselves). + if (MI->isCopy() && !TRI->regsOverlap(MI->getOperand(0).getReg(), + MI->getOperand(1).getReg())) { unsigned Def = MI->getOperand(0).getReg(); unsigned Src = MI->getOperand(1).getReg(); |
