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Put this expensive check below the less expensive ones.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155166 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2012-04-19 23:31:07 +00:00
parent f2ae3467ce
commit dc21604d4a
1 changed files with 9 additions and 9 deletions
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18
lib/Transforms/Scalar/LoopUnswitch.cpp
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@ -409,15 +409,6 @@ bool LoopUnswitch::processCurrentLoop() {
if (!currentLoop->isSafeToClone())
return false;
// Loops with invokes, whose unwind edge escapes the loop, cannot be
// unswitched because splitting their edges are non-trivial and don't preserve
// loop simplify information.
for (Loop::block_iterator I = currentLoop->block_begin(),
E = currentLoop->block_end(); I != E; ++I)
if (const InvokeInst *II = dyn_cast<InvokeInst>((*I)->getTerminator()))
if (!currentLoop->contains(II->getUnwindDest()))
return false;
// Without dedicated exits, splitting the exit edge may fail.
if (!currentLoop->hasDedicatedExits())
return false;
@ -429,6 +420,15 @@ bool LoopUnswitch::processCurrentLoop() {
if (!BranchesInfo.countLoop(currentLoop))
return false;
// Loops with invokes, whose unwind edge escapes the loop, cannot be
// unswitched because splitting their edges are non-trivial and don't preserve
// loop simplify information.
for (Loop::block_iterator I = currentLoop->block_begin(),
E = currentLoop->block_end(); I != E; ++I)
if (const InvokeInst *II = dyn_cast<InvokeInst>((*I)->getTerminator()))
if (!currentLoop->contains(II->getUnwindDest()))
return false;
// Loop over all of the basic blocks in the loop. If we find an interior
// block that is branching on a loop-invariant condition, we can unswitch this
// loop.