diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrInfo.cpp | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp index 784a790eb00..393bd5c2ca0 100644 --- a/llvm/lib/Target/X86/X86InstrInfo.cpp +++ b/llvm/lib/Target/X86/X86InstrInfo.cpp @@ -1697,10 +1697,18 @@ bool X86InstrInfo::copyRegToReg(MachineBasicBlock &MBB, CommonRC = SrcRC; else if (!DestRC->hasSubClass(SrcRC)) { // Neither of GR64_NOREX or GR64_NOSP is a superclass of the other, - // but we want to copy then as GR64. - if ((SrcRC == &X86::GR64RegClass || SrcRC->hasSuperClass(&X86::GR64RegClass)) && - (DestRC == &X86::GR64RegClass || DestRC->hasSuperClass(&X86::GR64RegClass))) + // but we want to copy then as GR64. Similarly, for GR32_NOREX and + // GR32_NOSP, copy as GR32. + if ((SrcRC == &X86::GR64RegClass || + SrcRC->hasSuperClass(&X86::GR64RegClass)) && + (DestRC == &X86::GR64RegClass || + DestRC->hasSuperClass(&X86::GR64RegClass))) CommonRC = &X86::GR64RegClass; + else if ((SrcRC == &X86::GR32RegClass || + SrcRC->hasSuperClass(&X86::GR32RegClass)) && + (DestRC == &X86::GR32RegClass || + DestRC->hasSuperClass(&X86::GR32RegClass))) + CommonRC = &X86::GR32RegClass; else CommonRC = 0; } |
