diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/RenameIndependentSubregs.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/RenameIndependentSubregs.cpp b/llvm/lib/CodeGen/RenameIndependentSubregs.cpp index a5abd500080..bd5ecbd28f2 100644 --- a/llvm/lib/CodeGen/RenameIndependentSubregs.cpp +++ b/llvm/lib/CodeGen/RenameIndependentSubregs.cpp @@ -243,7 +243,8 @@ void RenameIndependentSubregs::rewriteOperands(const IntEqClasses &Classes, unsigned VReg = Intervals[ID]->reg; MO.setReg(VReg); - if (MO.isTied()) { + + if (MO.isTied() && Reg != VReg) { /// Undef use operands are not tracked in the equivalence class but need /// to be update if they are tied. MO.getParent()->substituteRegister(Reg, VReg, 0, TRI); |
