diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86FastISel.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/Target/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp index 59500ad..3d57590 100644 --- a/lib/Target/X86/X86FastISel.cpp +++ b/lib/Target/X86/X86FastISel.cpp @@ -741,7 +741,11 @@ bool X86FastISel::X86SelectShift(Instruction *I) { if (Op1Reg == 0) return false; TII.copyRegToReg(*MBB, MBB->end(), CReg, Op1Reg, RC, RC); unsigned ResultReg = createResultReg(RC); - BuildMI(MBB, TII.get(OpReg), ResultReg).addReg(Op0Reg); + BuildMI(MBB, TII.get(OpReg), ResultReg).addReg(Op0Reg) + // FIXME: The "Local" register allocator's physreg liveness doesn't + // recognize subregs. Adding the superreg of CL that's actually defined + // prevents it from being re-allocated for this instruction. + .addReg(CReg, false, true); UpdateValueMap(I, ResultReg); return true; } |