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Lett users of sparse propagation do their own thing with phi nodes if they want

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to. This can be combined with LCSSA or SSI form to store more information on a
PHINode than can be computed by looking at its incoming values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82317 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2009-09-19 18:33:36 +00:00
parent ad38936781
commit 875646f376
2 changed files with 13 additions and 0 deletions
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7
lib/Analysis/SparsePropagation.cpp
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@ -223,6 +223,13 @@ void SparseSolver::visitTerminatorInst(TerminatorInst &TI) {
}
void SparseSolver::visitPHINode(PHINode &PN) {
if (LatticeFunc->IsSpecialCasedPHI(&PN)) {
LatticeVal IV = LatticeFunc->ComputeInstructionState(PN, *this);
if (IV != LatticeFunc->getUntrackedVal())
UpdateState(PN, IV);
return;
}
LatticeVal PNIV = getOrInitValueState(&PN);
LatticeVal Overdefined = LatticeFunc->getOverdefinedVal();