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remove use of Instruction::getNext

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36199 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2007-04-17 17:47:54 +00:00
parent b8e237bb86
commit decb0ca18b
1 changed files with 5 additions and 3 deletions
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8
lib/Transforms/Utils/SimplifyCFG.cpp
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@@ -1447,10 +1447,11 @@ bool llvm::SimplifyCFG(BasicBlock *BB) {
// predecessor and use logical operations to pick the right destination. // predecessor and use logical operations to pick the right destination.
BasicBlock *TrueDest = BI->getSuccessor(0); BasicBlock *TrueDest = BI->getSuccessor(0);
BasicBlock *FalseDest = BI->getSuccessor(1); BasicBlock *FalseDest = BI->getSuccessor(1);
if (Instruction *Cond = dyn_cast<Instruction>(BI->getCondition())) if (Instruction *Cond = dyn_cast<Instruction>(BI->getCondition())) {
BasicBlock::iterator CondIt = Cond;
if ((isa<CmpInst>(Cond) || isa<BinaryOperator>(Cond)) && if ((isa<CmpInst>(Cond) || isa<BinaryOperator>(Cond)) &&
Cond->getParent() == BB && &BB->front() == Cond && Cond->getParent() == BB && &BB->front() == Cond &&
Cond->getNext() == BI && Cond->hasOneUse() && &*++CondIt == BI && Cond->hasOneUse() &&
TrueDest != BB && FalseDest != BB) TrueDest != BB && FalseDest != BB)
for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI!=E; ++PI) for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI!=E; ++PI)
if (BranchInst *PBI = dyn_cast<BranchInst>((*PI)->getTerminator())) if (BranchInst *PBI = dyn_cast<BranchInst>((*PI)->getTerminator()))
@@ -1496,8 +1497,9 @@ bool llvm::SimplifyCFG(BasicBlock *BB) {
return SimplifyCFG(BB) | 1; return SimplifyCFG(BB) | 1;
} }
} }
}
// Scan predessor blocks for conditional branchs. // Scan predessor blocks for conditional branches.
for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI) for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
if (BranchInst *PBI = dyn_cast<BranchInst>((*PI)->getTerminator())) if (BranchInst *PBI = dyn_cast<BranchInst>((*PI)->getTerminator()))
if (PBI != BI && PBI->isConditional()) { if (PBI != BI && PBI->isConditional()) {