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[Bug tree-optimization/79920] Incorrect floating point results when compiling with -O3
- 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: Wed, 08 Mar 2017 08:50:33 +0000
- Subject: [Bug tree-optimization/79920] Incorrect floating point results when compiling with -O3
- Auto-submitted: auto-generated
- References: <bug-79920-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79920
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Mar 8 08:50:01 2017
New Revision: 245968
URL: https://gcc.gnu.org/viewcvs?rev=245968&root=gcc&view=rev
Log:
2017-03-08 Richard Biener <rguenther@suse.de>
PR tree-optimization/79920
* tree-vect-slp.c (vect_create_mask_and_perm): Remove and inline
with ncopies == 1 to ...
(vect_transform_slp_perm_load): ... here. Properly compute
all element loads by iterating VF times over the group. Do
not handle ncopies (computed in a broken way) in
vect_create_mask_and_perm.
* gcc.dg/vect/pr79920.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr79920.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-slp.c