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[C++11] Add predecessors(BasicBlock *) / successors(BasicBlock *) iterator ranges.

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Summary: This patch introduces two new iterator ranges and updates existing code to use it.  No functional change intended.

Test Plan: All tests (make check-all) still pass.

Reviewers: dblaikie

Reviewed By: dblaikie

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D4481

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213474 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Manuel Jacob
2014-07-20 09:10:11 +00:00
parent 83a385a57b
commit a4697dad19
41 changed files with 166 additions and 226 deletions
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16
lib/Transforms/Utils/Local.cpp
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@ -1129,8 +1129,8 @@ static void changeToUnreachable(Instruction *I, bool UseLLVMTrap) {
BasicBlock *BB = I->getParent();
// Loop over all of the successors, removing BB's entry from any PHI
// nodes.
for (succ_iterator SI = succ_begin(BB), SE = succ_end(BB); SI != SE; ++SI)
(*SI)->removePredecessor(BB);
for (BasicBlock *Succ : successors(BB))
Succ->removePredecessor(BB);
// Insert a call to llvm.trap right before this. This turns the undefined
// behavior into a hard fail instead of falling through into random code.
@ -1236,9 +1236,9 @@ static bool markAliveBlocks(BasicBlock *BB,
}
Changed |= ConstantFoldTerminator(BB, true);
for (succ_iterator SI = succ_begin(BB), SE = succ_end(BB); SI != SE; ++SI)
if (Reachable.insert(*SI))
Worklist.push_back(*SI);
for (BasicBlock *Succ : successors(BB))
if (Reachable.insert(Succ))
Worklist.push_back(Succ);
} while (!Worklist.empty());
return Changed;
}
@ -1263,9 +1263,9 @@ bool llvm::removeUnreachableBlocks(Function &F) {
if (Reachable.count(BB))
continue;
for (succ_iterator SI = succ_begin(BB), SE = succ_end(BB); SI != SE; ++SI)
if (Reachable.count(*SI))
(*SI)->removePredecessor(BB);
for (BasicBlock *Succ : successors(BB))
if (Reachable.count(Succ))
Succ->removePredecessor(BB);
BB->dropAllReferences();
}