[Bug tree-optimization/14341] Missed comparison optimization (jump threading related)

[kazu at cs dot umass dot edu]

------- Additional Comments From kazu at cs dot umass dot edu  2005-01-31 15:25 -------
Subject: Re:  Missed comparision optimization
 (jump threading related)

Hi Andrew,

> No, the first one is not even optimizated on the mainline on ppc:
>         cmpw cr7,r30,r28
>         crnot 30,29
>         mfcr r3
>         rlwinm r3,r3,31,1
>         bl L_f$stub

Could you post your tree dump?  This PR is supposed to be about tree
optimization.  If that is not true on PPC, you might want to change
this to rtl-optimization or something more appropriate.

As far as I can tell, tree dumps look OK for all test cases (with the
third one repaired).

Kazu Hirata


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14341