[Bug tree-optimization/31849] [4.3 Regression] Code size regression caused by fix to PR 31360

[ebotcazou at gcc dot gnu dot org]

------- Comment #21 from ebotcazou at gcc dot gnu dot org  2007-11-24 19:19 -------
> Why?  If using dec and branch is profitable, doloop pass should do it; the
> transformation that ivopts do does not prevent that or make it any more
> difficult.

I'm not sure that blindly doing transformations in the hope that subsequent
ones will repair the potential damages is always the way to go.  Why not
avoid causing the damages in some cases?  Is that really too "old-style"?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31849