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[Bug tree-optimization/33928] [4.3 Regression] 22% performance slowdown from 4.2.2 to 4.3.0 in floating-point code
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 22 Jan 2008 13:06:15 -0000
- Subject: [Bug tree-optimization/33928] [4.3 Regression] 22% performance slowdown from 4.2.2 to 4.3.0 in floating-point code
- References: <bug-33928-271@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #31 from rguenth at gcc dot gnu dot org 2008-01-22 13:06 -------
Created an attachment (id=14997)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14997&action=view)
asm with alias-oracle enabled FRE
This is the asm produced from direct.i with -O2 --param
max-fields-for-field-sensitive=1 (SFTs disabled, which is the goal for 4.4)
with the (ok, a modified) alias-oracle patch for FRE applied.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33928