[Bug tree-optimization/33928] [4.3/4.4/4.5 Regression] 30% performance slowdown in floating-point code caused by r118475

[bonzini at gnu dot org]

------- Comment #56 from bonzini at gnu dot org  2009-05-06 09:31 -------
Created an attachment (id=17808)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17808&action=view)
usable testcase

Ok, I managed to make a reasonably readable source code (uninclude stdlib
files, remove unused gambit stuff and ___ prefixes, simplify some expressions),
find the heavy loops, annotate them with asm statements (see comment #18,
2007-11-30) and find the length of the loops.

                   4.2      4.5     4.5 + patch
LOOP 1            ~190     ~230    ~190
INNER LOOP 1.1    ~120     ~130    ~120
LOOP 2             33       36      31

I am thus obsoleting (almost) everything that was posted and is not relevant
anymore.  Let's start from scratch with the new testcase.


-- 

bonzini at gnu dot org changed:

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33928