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[block-freq] Add a method to loop info for returning all loop latches for a specific loop.
We already have a method for returning one loop latch but for some reason no one has committed one for returning loop latches in the case where there are multiple latches. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195410 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -228,6 +228,18 @@ public:
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/// A latch block is a block that contains a branch back to the header.
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/// A latch block is a block that contains a branch back to the header.
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BlockT *getLoopLatch() const;
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BlockT *getLoopLatch() const;
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/// getLoopLatches - Return all loop latch blocks of this loop. A latch block
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/// is a block that contains a branch back to the header.
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void getLoopLatches(SmallVectorImpl<BlockT *> &LoopLatches) const {
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BlockT *H = getHeader();
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typedef GraphTraits<Inverse<BlockT*> > InvBlockTraits;
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for (typename InvBlockTraits::ChildIteratorType I =
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InvBlockTraits::child_begin(H),
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E = InvBlockTraits::child_end(H); I != E; ++I)
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if (contains(*I))
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LoopLatches.push_back(*I);
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}
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//===--------------------------------------------------------------------===//
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//===--------------------------------------------------------------------===//
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// APIs for updating loop information after changing the CFG
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// APIs for updating loop information after changing the CFG
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//
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//
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