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[FastISel] Fix a potential bug in FastEmitInst_ri 

FastEmitInst_ri was constraining the first operand without checking if it is
a virtual register. Use constrainOperandRegClass as all the other
FastEmitInst_* functions.

llvm-svn: 216613
This commit is contained in:
Juergen Ributzka 2014-08-27 20:47:33 +00:00
parent 0b9bab48bb
commit 833bc681e3
1 changed files with 1 additions and 2 deletions
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3
llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
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@ -1816,8 +1816,7 @@ unsigned FastISel::FastEmitInst_ri(unsigned MachineInstOpcode,
const MCInstrDesc &II = TII.get(MachineInstOpcode);
unsigned ResultReg = createResultReg(RC);
RC = TII.getRegClass(II, II.getNumDefs(), &TRI, *FuncInfo.MF);
MRI.constrainRegClass(Op0, RC);
Op0 = constrainOperandRegClass(II, Op0, II.getNumDefs());
if (II.getNumDefs() >= 1)
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc, II, ResultReg)