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Dereference loopHeader after checking for null rather than before.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90990 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-12-09 22:55:01 +00:00
parent ce72f3fbdf
commit f68d0c1bbe
1 changed files with 2 additions and 1 deletions
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3
lib/Transforms/Scalar/LoopUnswitch.cpp
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@ -404,12 +404,13 @@ bool LoopUnswitch::IsTrivialUnswitchCondition(Value *Cond, Constant **Val,
bool LoopUnswitch::UnswitchIfProfitable(Value *LoopCond, Constant *Val){
initLoopData();
Function *F = loopHeader->getParent();
// If LoopSimplify was unable to form a preheader, don't do any unswitching.
if (!loopPreheader)
return false;
Function *F = loopHeader->getParent();
// If the condition is trivial, always unswitch. There is no code growth for
// this case.
if (!IsTrivialUnswitchCondition(LoopCond)) {