[LLVMbugs] [Bug 19568] slp-vectorizer on at -O0

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon Apr 28 14:53:57 PDT 2014


http://llvm.org/bugs/show_bug.cgi?id=19568

Chad Rosier <mcrosier at codeaurora.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #8 from Chad Rosier <mcrosier at codeaurora.org> ---
Reopening to discuss -Oz and -O1.  The slp vectorizer should reduce code-size,
so it seems it would be good to have it enabled at -Oz.  Chandler also points
out that a case for enabling it at -O1 can be made if the compile-time impact
is relatively low.

Personally, I can get on board with -Oz.  I don't know the compile-time impact,
so I won't comment on -O1.

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