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simplify some code.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44295 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-11-23 22:36:49 +00:00
parent 5e557123ad
commit 8314a0cd0f
1 changed files with 1 additions and 5 deletions
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6
lib/Analysis/ScalarEvolution.cpp
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@ -1416,11 +1416,7 @@ SCEVHandle ScalarEvolutionsImpl::createNodeForPHI(PHINode *PN) {
/// it returns 2. If S is guaranteed to be 0, it returns the bitwidth of S.
static uint32_t GetMinTrailingZeros(SCEVHandle S) {
if (SCEVConstant *C = dyn_cast<SCEVConstant>(S))
// APInt::countTrailingZeros() returns the number of trailing zeros in its
// internal representation, which length may be greater than the represented
// value bitwidth. This is why we use a min operation here.
return std::min(C->getValue()->getValue().countTrailingZeros(),
C->getBitWidth());
return C->getValue()->getValue().countTrailingZeros();
if (SCEVTruncateExpr *T = dyn_cast<SCEVTruncateExpr>(S))
return std::min(GetMinTrailingZeros(T->getOperand()), T->getBitWidth());