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Minor cleanup. Use dyn_cast, not isa/cast pairs. No functionality change. 

llvm-svn: 60623
This commit is contained in:
Nick Lewycky 2008-12-06 17:57:05 +00:00
parent 69d78b9d98
commit 1f6a7b5002
1 changed files with 5 additions and 5 deletions
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10
llvm/lib/Analysis/ScalarEvolution.cpp
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@ -2911,18 +2911,18 @@ bool ScalarEvolutionsImpl::potentialInfiniteLoop(SCEV *Stride, SCEV *RHS,
bool isSigned, bool trueWhenEqual) { bool isSigned, bool trueWhenEqual) {
// Return true when the distance from RHS to maxint > Stride. // Return true when the distance from RHS to maxint > Stride.
if (!isa<SCEVConstant>(Stride)) SCEVConstant *SC = dyn_cast<SCEVConstant>(Stride);
if (!SC)
return true; return true;
SCEVConstant *SC = cast<SCEVConstant>(Stride);
if (SC->getValue()->isZero()) if (SC->getValue()->isZero())
return true; return true;
if (!trueWhenEqual && SC->getValue()->isOne()) if (!trueWhenEqual && SC->getValue()->isOne())
return false; return false;
if (!isa<SCEVConstant>(RHS)) SCEVConstant *R = dyn_cast<SCEVConstant>(RHS);
if (!R)
return true; return true;
SCEVConstant *R = cast<SCEVConstant>(RHS);
if (isSigned) if (isSigned)
return true; // XXX: because we don't have an sdiv scev. return true; // XXX: because we don't have an sdiv scev.
@ -2983,7 +2983,7 @@ HowManyLessThans(SCEV *LHS, SCEV *RHS, const Loop *L,
// loop by one iteration. // loop by one iteration.
// //
// The loop won't actually run (m-n)/s times because the loop iterations // The loop won't actually run (m-n)/s times because the loop iterations
// won't divide evenly. For example, if you have {2,+,5} u< 10 the // might not divide cleanly. For example, if you have {2,+,5} u< 10 the
// division would equal one, but the loop runs twice putting the // division would equal one, but the loop runs twice putting the
// induction variable at 12. // induction variable at 12.