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Handle the case where target-specific fastisel code doesn't have

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a desired opcode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55005 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-08-19 20:43:22 +00:00
parent 379cad44ec
commit 32155acb8a
1 changed files with 5 additions and 0 deletions
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5
lib/CodeGen/SelectionDAG/FastISel.cpp
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@ -33,6 +33,11 @@ FastISel::SelectInstructions(BasicBlock::iterator Begin, BasicBlock::iterator En
return I;
}
unsigned ResultReg = FastEmit_rr(VT.getSimpleVT(), ISD::ADD, Op0, Op1);
if (ResultReg == 0) {
// Target-specific code wasn't able to find a machine opcode for
// the given ISD opcode and type. Halt "fast" selection and bail.
return I;
}
ValueMap[I] = ResultReg;
break;
}