[llvm-commits] [llvm] r73355 - /llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp

[Dan Gohman]

Author: djg
Date: Sun Jun 14 17:38:41 2009
New Revision: 73355

URL: http://llvm.org/viewvc/llvm-project?rev=73355&view=rev
Log:
Add another item to the list of things that indvars does.

Modified:
    llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp

Modified: llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp?rev=73355&r1=73354&r2=73355&view=diff

==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/IndVarSimplify.cpp Sun Jun 14 17:38:41 2009
@@ -17,7 +17,10 @@
 //      which starts at zero and steps by one.
 //   2. The canonical induction variable is guaranteed to be the first PHI node
 //      in the loop header block.
-//   3. Any pointer arithmetic recurrences are raised to use array subscripts.
+//   3. The canonical induction variable is guaranteed to be in a wide enough
+//      type so that IV expressions need not be (directly) zero-extended or
+//      sign-extended.
+//   4. Any pointer arithmetic recurrences are raised to use array subscripts.
 //
 // If the trip count of a loop is computable, this pass also makes the following
 // changes: