diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/FastISel.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp index 0c1ac69..07687ef 100644 --- a/lib/CodeGen/SelectionDAG/FastISel.cpp +++ b/lib/CodeGen/SelectionDAG/FastISel.cpp @@ -1345,6 +1345,8 @@ unsigned FastISel::FastEmitInst_extractsubreg(MVT RetVT, unsigned ResultReg = createResultReg(TLI.getRegClassFor(RetVT)); assert(TargetRegisterInfo::isVirtualRegister(Op0) && "Cannot yet extract from physregs"); + const TargetRegisterClass *RC = MRI.getRegClass(Op0); + MRI.constrainRegClass(Op0, TRI.getSubClassWithSubReg(RC, Idx)); BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY), ResultReg) .addReg(Op0, getKillRegState(Op0IsKill), Idx); |