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r259822 - in /trunk/gcc: ChangeLog testsuite/Ch...
- From: rsandifo at gcc dot gnu dot org
- To: gcc-cvs at gcc dot gnu dot org
- Date: Wed, 02 May 2018 07:40:23 -0000
- Subject: r259822 - in /trunk/gcc: ChangeLog testsuite/Ch...
Author: rsandifo
Date: Wed May 2 07:40:22 2018
New Revision: 259822
URL: https://gcc.gnu.org/viewcvs?rev=259822&root=gcc&view=rev
Log:
Tighten early exit in vect_analyze_data_ref_dependence (PR85586)
The problem in this PR was that we didn't consider aliases between
writes in the same strided group. After tightening the early exit
we get the expected abs(step) >= 2 versioning check.
2018-05-02 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
PR tree-optimization/85586
* tree-vect-data-refs.c (vect_analyze_data_ref_dependence): Only
exit early for statements in the same group if the accesses are
not strided.
gcc/testsuite/
PR tree-optimization/85586
* gcc.dg/vect/pr85586.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr85586.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c