[llvm-commits] CVS: llvm/include/llvm/Analysis/LoopInfo.h

[Chris Lattner]

Changes in directory llvm/include/llvm/Analysis:

LoopInfo.h updated: 1.43 -> 1.44
---
Log message:

new helper method


---
Diffs of the changes:  (+15 -0)

 LoopInfo.h |   15 +++++++++++++++
 1 files changed, 15 insertions(+)


Index: llvm/include/llvm/Analysis/LoopInfo.h
diff -u llvm/include/llvm/Analysis/LoopInfo.h:1.43 llvm/include/llvm/Analysis/LoopInfo.h:1.44
--- llvm/include/llvm/Analysis/LoopInfo.h:1.43	Mon Dec  6 22:03:45 2004
+++ llvm/include/llvm/Analysis/LoopInfo.h	Sun Mar  6 14:55:34 2005
@@ -175,6 +175,21 @@
     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.