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fix PHI translation to take the PHI out of the instinputs set and add

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the translated value back to it if an instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90909 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-12-09 00:18:13 +00:00
parent af50315a29
commit e09e98c2de
1 changed files with 7 additions and 9 deletions
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16
lib/Analysis/PHITransAddr.cpp
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@ -164,22 +164,20 @@ Value *PHITransAddr::PHITranslateSubExpr(Value *V, BasicBlock *CurBB,
// input.
return Inst;
}
// If 'Inst' is defined in this block, it must be an input that needs to be
// phi translated or an intermediate expression that needs to be incorporated
// into the expression.
// If 'Inst' is defined in this block and is an input that needs to be phi
// translated, we need to incorporate the value into the expression or fail.
// If this is a PHI, go ahead and translate it.
if (PHINode *PN = dyn_cast<PHINode>(Inst))
return PN->getIncomingValueForBlock(PredBB);
return ReplaceInstWithValue(PN, PN->getIncomingValueForBlock(PredBB));
// If this is a non-phi value, and it is analyzable, we can incorporate it
// into the expression by making all instruction operands be inputs.
if (!CanPHITrans(Inst))
return 0;
// Okay, we can incorporate it, this instruction is no longer an input.
// The instruction itself isn't an input any longer.
InstInputs.erase(std::find(InstInputs.begin(), InstInputs.end(), Inst));
// All instruction operands are now inputs (and of course, they may also be