diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/RenameIndependentSubregs.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/RenameIndependentSubregs.cpp b/llvm/lib/CodeGen/RenameIndependentSubregs.cpp index cc32e43968b..6923716e10c 100644 --- a/llvm/lib/CodeGen/RenameIndependentSubregs.cpp +++ b/llvm/lib/CodeGen/RenameIndependentSubregs.cpp @@ -243,6 +243,11 @@ void RenameIndependentSubregs::rewriteOperands(const IntEqClasses &Classes, unsigned VReg = Intervals[ID]->reg; MO.setReg(VReg); + if (MO.isTied()) { + /// 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); + } } // TODO: We could attempt to recompute new register classes while visiting // the operands: Some of the split register may be fine with less constraint |
