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Remove hack from r154987. The problem persists even with it, so it's not even a good hack.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155813 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2012-04-30 09:23:48 +00:00
parent 7d1e3dcf71
commit 6aa33274ed
1 changed files with 1 additions and 11 deletions
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12
lib/Transforms/Scalar/LoopUnswitch.cpp
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@ -420,15 +420,6 @@ 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.
@ -633,11 +624,10 @@ bool LoopUnswitch::IsTrivialUnswitchCondition(Value *Cond, Constant **Val,
/// LoopCond == Val to simplify the loop. If we decide that this is profitable,
/// unswitch the loop, reprocess the pieces, then return true.
bool LoopUnswitch::UnswitchIfProfitable(Value *LoopCond, Constant *Val) {
Function *F = loopHeader->getParent();
Constant *CondVal = 0;
BasicBlock *ExitBlock = 0;
if (IsTrivialUnswitchCondition(LoopCond, &CondVal, &ExitBlock)) {
// If the condition is trivial, always unswitch. There is no code growth
// for this case.