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llvm-svn: 80452
This commit is contained in:
Dan Gohman 2009-08-29 23:36:57 +00:00
parent e0697de4c6
commit c9dbe1610e
1 changed files with 5 additions and 0 deletions
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5
lib/Analysis/ScalarEvolutionAliasAnalysis.cpp
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@ -69,9 +69,14 @@ ScalarEvolutionAliasAnalysis::runOnFunction(Function &F) {
return false;
}
/// GetUnderlyingIdentifiedObject - Given an expression, try to find an
/// "identified object" (see AliasAnalysis::isIdentifiedObject) base
/// value. Return null is none was found.
Value *
ScalarEvolutionAliasAnalysis::GetUnderlyingIdentifiedObject(const SCEV *S) {
if (const SCEVAddRecExpr *AR = dyn_cast<SCEVAddRecExpr>(S)) {
// In an addrec, assume that the base will be in the start, rather
// than the step.
return GetUnderlyingIdentifiedObject(AR->getStart());
} else if (const SCEVAddExpr *A = dyn_cast<SCEVAddExpr>(S)) {
// If there's a pointer operand, it'll be sorted at the end of the list.