Add support for reverse induction variables. For example:
authorNadav Rotem <nrotem@apple.com>
Mon, 10 Dec 2012 19:25:06 +0000 (19:25 +0000)
committerNadav Rotem <nrotem@apple.com>
Mon, 10 Dec 2012 19:25:06 +0000 (19:25 +0000)
commitf0d19bd1291ee1d2ffee4bbe0aef12b814aff789
treeaae787dd66c027291499ab997c5f8f0d6bf987a8
parent0a2e27d96428e7dd0c834deb7a97033438b6dd8e
Add support for reverse induction variables. For example:

while (i--)
 sum+=A[i];

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169752 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Transforms/Vectorize/LoopVectorize.cpp
test/Transforms/LoopVectorize/gcc-examples.ll