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When unswitching a trivial loop, do admit we are doing it! :) 

llvm-svn: 26102
This commit is contained in:
Chris Lattner 2006-02-10 01:36:35 +00:00
parent ed7a67b0de
commit 3fc3148b85
1 changed files with 7 additions and 0 deletions
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7
llvm/lib/Transforms/Scalar/LoopUnswitch.cpp
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@ -346,6 +346,11 @@ static Loop *CloneLoop(Loop *L, Loop *PL, std::map<const Value*, Value*> &VM,
/// moving the conditional branch outside of the loop and updating loop info. /// moving the conditional branch outside of the loop and updating loop info.
void LoopUnswitch::UnswitchTrivialCondition(Loop *L, Value *Cond, void LoopUnswitch::UnswitchTrivialCondition(Loop *L, Value *Cond,
ConstantBool *LoopCond) { ConstantBool *LoopCond) {
DEBUG(std::cerr << "loop-unswitch: Trivial-Unswitch loop %"
<< L->getHeader()->getName() << " [" << L->getBlocks().size()
<< " blocks] in Function " << L->getHeader()->getParent()->getName()
<< " on cond:" << *Cond << "\n");
// First step, split the preahder, so that we know that there is a safe place // First step, split the preahder, so that we know that there is a safe place
// to insert the conditional branch. We will change 'OrigPH' to have a // to insert the conditional branch. We will change 'OrigPH' to have a
// conditional branch on Cond. // conditional branch on Cond.
@ -373,6 +378,8 @@ void LoopUnswitch::UnswitchTrivialCondition(Loop *L, Value *Cond,
// particular value, rewrite the loop with this info. We know that this will // particular value, rewrite the loop with this info. We know that this will
// at least eliminate the old branch. // at least eliminate the old branch.
RewriteLoopBodyWithConditionConstant(L, Cond, EnterOnTrue); RewriteLoopBodyWithConditionConstant(L, Cond, EnterOnTrue);
++NumUnswitched;
} }