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add a method
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31249 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -107,6 +107,12 @@ public:
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// induction variable canonicalization pass should be used to normalize loops
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// for easy analysis. These methods assume canonical loops.
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/// getExitingBlocks - Return all blocks inside the loop that have successors
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/// outside of the loop. These are the blocks _inside of the current loop_
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/// which branch out. The returned list is always unique.
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///
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void getExitingBlocks(std::vector<BasicBlock*> &Blocks) const;
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/// getExitBlocks - Return all of the successor blocks of this loop. These
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/// are the blocks _outside of the current loop_ which are branched to.
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///
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@ -332,6 +332,26 @@ void LoopInfo::removeBlock(BasicBlock *BB) {
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// APIs for simple analysis of the loop.
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//
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/// getExitingBlocks - Return all blocks inside the loop that have successors
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/// outside of the loop. These are the blocks _inside of the current loop_
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/// which branch out. The returned list is always unique.
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///
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void Loop::getExitingBlocks(std::vector<BasicBlock*> &ExitingBlocks) const {
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// Sort the blocks vector so that we can use binary search to do quick
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// lookups.
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std::vector<BasicBlock*> LoopBBs(block_begin(), block_end());
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std::sort(LoopBBs.begin(), LoopBBs.end());
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for (std::vector<BasicBlock*>::const_iterator BI = Blocks.begin(),
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BE = Blocks.end(); BI != BE; ++BI)
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for (succ_iterator I = succ_begin(*BI), E = succ_end(*BI); I != E; ++I)
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if (!std::binary_search(LoopBBs.begin(), LoopBBs.end(), *I)) {
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// Not in current loop? It must be an exit block.
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ExitingBlocks.push_back(*BI);
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break;
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}
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}
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/// getExitBlocks - Return all of the successor blocks of this loop. These
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/// are the blocks _outside of the current loop_ which are branched to.
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///
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