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[Bug tree-optimization/79207] Special trigonometric simplification for solving cubics with -ffast-math
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 24 Jan 2017 09:28:44 +0000
- Subject: [Bug tree-optimization/79207] Special trigonometric simplification for solving cubics with -ffast-math
- Auto-submitted: auto-generated
- References: <bug-79207-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79207
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-01-24
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Basically fits the "dataflow" we do in the sincos pass, you'd have to pattern
match the add/mul sequence and relate the args to the cos calls of course.
Just in case anybody wants to work on this...