diff options
author | Dan Gohman <gohman@apple.com> | 2009-12-18 01:24:09 +0000 |
---|---|---|
committer | Dan Gohman <gohman@apple.com> | 2009-12-18 01:24:09 +0000 |
commit | 92329c7fbe572892c17aa2d2542a10e3ea16132f (patch) | |
tree | ce133aeb6883b2cb097896877b881cbb1340287a /include/llvm/Analysis/LoopInfo.h | |
parent | 3ca735450db584068f07b728f0537c3e9208a699 (diff) | |
download | external_llvm-92329c7fbe572892c17aa2d2542a10e3ea16132f.zip external_llvm-92329c7fbe572892c17aa2d2542a10e3ea16132f.tar.gz external_llvm-92329c7fbe572892c17aa2d2542a10e3ea16132f.tar.bz2 |
Add Loop contains utility methods for testing whether a loop
contains another loop, or an instruction. The loop form is
substantially more efficient on large loops than the typical
code it replaces.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91654 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/Analysis/LoopInfo.h')
-rw-r--r-- | include/llvm/Analysis/LoopInfo.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/include/llvm/Analysis/LoopInfo.h b/include/llvm/Analysis/LoopInfo.h index 2294e53..d513f2c 100644 --- a/include/llvm/Analysis/LoopInfo.h +++ b/include/llvm/Analysis/LoopInfo.h @@ -93,12 +93,28 @@ public: BlockT *getHeader() const { return Blocks.front(); } LoopT *getParentLoop() const { return ParentLoop; } - /// contains - Return true if the specified basic block is in this loop + /// contains - Return true if the specified loop is contained within in + /// this loop. + /// + bool contains(const LoopT *L) const { + if (L == this) return true; + if (L == 0) return false; + return contains(L->getParentLoop()); + } + + /// contains - Return true if the specified basic block is in this loop. /// bool contains(const BlockT *BB) const { return std::find(block_begin(), block_end(), BB) != block_end(); } + /// contains - Return true if the specified instruction is in this loop. + /// + template<class InstT> + bool contains(const InstT *Inst) const { + return contains(Inst->getParent()); + } + /// iterator/begin/end - Return the loops contained entirely within this loop. /// const std::vector<LoopT *> &getSubLoops() const { return SubLoops; } |