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[Bug tree-optimization/68238] Vector cost model overestimates prologue cost for SLPed code
- From: "jgreenhalgh at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 10 Nov 2015 10:08:35 +0000
- Subject: [Bug tree-optimization/68238] Vector cost model overestimates prologue cost for SLPed code
- Auto-submitted: auto-generated
- References: <bug-68238-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68238
--- Comment #2 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
Author: jgreenhalgh
Date: Tue Nov 10 10:08:03 2015
New Revision: 230092
URL: https://gcc.gnu.org/viewcvs?rev=230092&root=gcc&view=rev
Log:
[Patch GCC 5/Vect] Partial backport of r228751 (pr68238)
gcc/
Partial backport from trunk r228751.
PR tree-optimization/68238
2015-10-13 Richard Biener <rguenther@suse.de>
* tree-vect-loop.c (vect_estimate_min_profitable_iters): Use
LOOP_VINFO_COMP_ALIAS_DDRS to estimate alias versioning cost.
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/tree-vect-loop.c