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[Bug rtl-optimization/42694] Compiler could optimize pow (x, 0.75) into sqrt (x) * sqrt (sqrt (x))
- From: "meissner at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 11 Jan 2010 21:42:04 -0000
- Subject: [Bug rtl-optimization/42694] Compiler could optimize pow (x, 0.75) into sqrt (x) * sqrt (sqrt (x))
- References: <bug-42694-15150@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from meissner at gcc dot gnu dot org 2010-01-11 21:42 -------
Created an attachment (id=19542)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19542&action=view)
Program to demonstrate the slowdown
This program calculates the speed of various pow arguments.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42694