diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/llvm/Analysis/LoopInfo.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/llvm/Analysis/LoopInfo.h b/include/llvm/Analysis/LoopInfo.h index 0be3ddb..402897c 100644 --- a/include/llvm/Analysis/LoopInfo.h +++ b/include/llvm/Analysis/LoopInfo.h @@ -175,6 +175,21 @@ public: Blocks.push_back(BB); } + /// moveToHeader - This method is used to move BB (which must be part of this + /// loop) to be the loop header of the loop (the block that dominates all + /// others). + void moveToHeader(BasicBlock *BB) { + if (Blocks[0] == BB) return; + for (unsigned i = 0; ; ++i) { + assert(i != Blocks.size() && "Loop does not contain BB!"); + if (Blocks[i] == BB) { + Blocks[i] = Blocks[0]; + Blocks[0] = BB; + return; + } + } + } + /// removeBlockFromLoop - This removes the specified basic block from the /// current loop, updating the Blocks as appropriate. This does not update /// the mapping in the LoopInfo class. |