https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68633
Bug ID: 68633
Summary: [i386, AVX-512] Spec2006/434. miscompares when
executed on KNL
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: kyukhin at gcc dot gnu.org
Target Milestone: ---
Created attachment 36880
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36880&action=edit
Reproducer
Attached test case is reduced version of the problem.
To reproduce:
$ ./build-x86_64-linux/gcc/xgcc -B./build-x86_64-linux/gcc ~/test.c -O3
-march=knl
$ ~/sde/sde-internal-rs-7.31.0-2015-09-25-lin/sde64 -- ./a.out
libc: Fatal signal 6 (SIGABRT), code -6 in tid 34536^@
Aborted (core dumped)
This is most likely recent introduction of scalar masking. I suspect that order
of operands is
incorrect in the pattern
