[Bug tree-optimization/46970] [4.3/4.4/4.5/4.6 Regression] wrong code with -Os -ftree-loop-linear

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46970

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-12-17 17:14:01 UTC ---
Created attachment 22801
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22801
gcc46-pr46970.patch

Untested patch that fixes this and keeps ltrans-3.c working.

I don't feel very good about the +-1 * stepint extra adjustments the code did
and still does though, I'm afraid there could be problems with that if there is
an overflow, but it would be much more work to adjust lambda-code.c so that it
deals with this properly.