[llvm-commits] [llvm] r101248 - /llvm/trunk/lib/Analysis/ScalarEvolution.cpp

[Dan Gohman]

Author: djg
Date: Wed Apr 14 11:08:56 2010
New Revision: 101248

URL: http://llvm.org/viewvc/llvm-project?rev=101248&view=rev
Log:
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Modified:
    llvm/trunk/lib/Analysis/ScalarEvolution.cpp

Modified: llvm/trunk/lib/Analysis/ScalarEvolution.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/ScalarEvolution.cpp?rev=101248&r1=101247&r2=101248&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/ScalarEvolution.cpp (original)
+++ llvm/trunk/lib/Analysis/ScalarEvolution.cpp Wed Apr 14 11:08:56 2010
@@ -4634,6 +4634,8 @@
 
 /// getLoopPredecessor - If the given loop's header has exactly one unique
 /// predecessor outside the loop, return it. Otherwise return null.
+/// This is less strict that the loop "preheader" concept, which requires
+/// the predecessor to have only one single successor.
 ///
 BasicBlock *ScalarEvolution::getLoopPredecessor(const Loop *L) {
   BasicBlock *Header = L->getHeader();