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Fix a recent fast-isel coverage regression - don't bail out before

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giving the target a chance to materialize constants.

llvm-svn: 56605
This commit is contained in:
Dan Gohman 2008-09-25 01:28:51 +00:00
parent ed3216739e
commit 1776533304
1 changed files with 4 additions and 3 deletions
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7
lib/CodeGen/SelectionDAG/FastISel.cpp
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@ -75,16 +75,17 @@ unsigned FastISel::getRegForValue(Value *V) {
} else if (isa<UndefValue>(V)) {
Reg = createResultReg(TLI.getRegClassFor(VT));
BuildMI(MBB, TII.get(TargetInstrInfo::IMPLICIT_DEF), Reg);
} else {
return 0;
}
// If target-independent code couldn't handle the value, give target-specific
// code a try.
if (!Reg && isa<Constant>(V))
Reg = TargetMaterializeConstant(cast<Constant>(V));
// Don't cache constant materializations in the general ValueMap.
// To do so would require tracking what uses they dominate.
LocalValueMap[V] = Reg;
if (Reg != 0)
LocalValueMap[V] = Reg;
return Reg;
}