diff options
Diffstat (limited to 'llvm/lib/CodeGen/RegAllocFast.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/RegAllocFast.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/RegAllocFast.cpp b/llvm/lib/CodeGen/RegAllocFast.cpp index 613e146..dd6f315 100644 --- a/llvm/lib/CodeGen/RegAllocFast.cpp +++ b/llvm/lib/CodeGen/RegAllocFast.cpp @@ -1321,9 +1321,11 @@ void RegAllocFast::allocateInstruction(MachineInstr &MI) { if (!MO.isReg() || !MO.isDef()) continue; + Register Reg = MO.getReg(); + // subreg defs don't free the full register. We left the subreg number // around as a marker in setPhysReg() to recognize this case here. - if (MO.getSubReg() != 0) { + if (Reg.isPhysical() && MO.getSubReg() != 0) { MO.setSubReg(0); continue; } @@ -1334,7 +1336,6 @@ void RegAllocFast::allocateInstruction(MachineInstr &MI) { // Do not free tied operands and early clobbers. if ((MO.isTied() && !TiedOpIsUndef(MO, I)) || MO.isEarlyClobber()) continue; - Register Reg = MO.getReg(); if (!Reg) continue; if (Reg.isVirtual()) { |