https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85891
Jakub Jelinek changed:
What|Removed |Added
Status|WAITING |RESOLVED
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85891
--- Comment #8 from rguenther at suse dot de ---
On Thu, 24 May 2018, jason.vas.dias at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85891
>
> --- Comment #7 from Jason Vas Dias ---
> Aha!
> Yes, I was experimenting
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85891
--- Comment #7 from Jason Vas Dias ---
Aha!
Yes, I was experimenting with the new '-march=haswell' and
'-mtune=intel' options
( which seem to me to be the wrong way round - shouldn't 'haswell' be an
'-mtune' option and 'intel' be an '-march'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85891
--- Comment #6 from Richard Biener ---
The log file shows the loop was already vectorized by loop vectorization. How
did you configure gcc? It might be you configured a default -march/tune that
doesn't match the testcase expectation (and the
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85891
--- Comment #5 from Jason Vas Dias ---
Could it be an issue to do with running on different hardware?
The CPU on the machine is a rather old 4-core (8 with HyperThreading)
Haswell :
processor : 0
vendor_id : GenuineIntel
cpu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85891
--- Comment #4 from Jason Vas Dias ---
Same commands run by GCC 5.5.0 or GCC 7.3.1 succeed:
$ g++5 slp-pr56812.cc -nostdinc++ -std=c++98 -O2 -ftree-vectorize
-fno-vect-cost-model -msse2 -fdump-tree-slp-details=gcc5.out -O3 -funroll-loops
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85891
--- Comment #3 from Jason Vas Dias ---
Created attachment 44174
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44174=edit
slp1 log file
Here is the slp1 log file produced by command:
$
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85891
--- Comment #2 from Jason Vas Dias ---
Created attachment 44173
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44173=edit
log file produced by 'make check-g++ 'RUNTESTFLAGS=vect.exp=slp-pr56812*'
Log file showing test failures as
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85891
Richard Biener changed:
What|Removed |Added
Target||x86_64-*-*
