diff options
Diffstat (limited to 'lib/Transforms/Scalar/LoopUnswitch.cpp')
-rw-r--r-- | lib/Transforms/Scalar/LoopUnswitch.cpp | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/lib/Transforms/Scalar/LoopUnswitch.cpp b/lib/Transforms/Scalar/LoopUnswitch.cpp index 61de996cff..5954f4af51 100644 --- a/lib/Transforms/Scalar/LoopUnswitch.cpp +++ b/lib/Transforms/Scalar/LoopUnswitch.cpp @@ -939,9 +939,8 @@ static void ReplaceUsesOfWith(Instruction *I, Value *V, Worklist.push_back(Use); // Add users to the worklist which may be simplified now. - for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); - UI != E; ++UI) - Worklist.push_back(cast<Instruction>(*UI)); + for (User *U : I->users()) + Worklist.push_back(cast<Instruction>(U)); LPM->deleteSimpleAnalysisValue(I, L); RemoveFromWorklist(I, Worklist); I->replaceAllUsesWith(V); @@ -991,12 +990,11 @@ void LoopUnswitch::RewriteLoopBodyWithConditionConstant(Loop *L, Value *LIC, Replacement = ConstantInt::get(Type::getInt1Ty(Val->getContext()), !cast<ConstantInt>(Val)->getZExtValue()); - for (Value::use_iterator UI = LIC->use_begin(), E = LIC->use_end(); - UI != E; ++UI) { - Instruction *U = dyn_cast<Instruction>(*UI); - if (!U || !L->contains(U)) + for (User *U : LIC->users()) { + Instruction *UI = dyn_cast<Instruction>(U); + if (!UI || !L->contains(UI)) continue; - Worklist.push_back(U); + Worklist.push_back(UI); } for (std::vector<Instruction*>::iterator UI = Worklist.begin(), @@ -1010,19 +1008,18 @@ void LoopUnswitch::RewriteLoopBodyWithConditionConstant(Loop *L, Value *LIC, // Otherwise, we don't know the precise value of LIC, but we do know that it // is certainly NOT "Val". As such, simplify any uses in the loop that we // can. This case occurs when we unswitch switch statements. - for (Value::use_iterator UI = LIC->use_begin(), E = LIC->use_end(); - UI != E; ++UI) { - Instruction *U = dyn_cast<Instruction>(*UI); - if (!U || !L->contains(U)) + for (User *U : LIC->users()) { + Instruction *UI = dyn_cast<Instruction>(U); + if (!UI || !L->contains(UI)) continue; - Worklist.push_back(U); + Worklist.push_back(UI); // TODO: We could do other simplifications, for example, turning // 'icmp eq LIC, Val' -> false. // If we know that LIC is not Val, use this info to simplify code. - SwitchInst *SI = dyn_cast<SwitchInst>(U); + SwitchInst *SI = dyn_cast<SwitchInst>(UI); if (SI == 0 || !isa<ConstantInt>(Val)) continue; SwitchInst::CaseIt DeadCase = SI->findCaseValue(cast<ConstantInt>(Val)); |