https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78084
Bug ID: 78084
Summary: gcc miscompiles vec_vsx_ld on -O3
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
Assignee: unassigned at gcc dot gnu.org
Reporter: lu_zero at gentoo dot org
Target Milestone: ---
Host: powerpc64le-linux-gnu
Target: powerpc64le-linux-gnu
Created attachment 39872
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39872&action=edit
testcase
The value is the same as vec_ld even for unaligned pointers.
To reproduce:
gcc -std=c99 -mvsx -maltivec testcase.c && ./a.out
gcc -std=c99 -O3 -mvsx -maltivec testcase.c && ./a.out
Tested with gcc (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.2) 5.4.0 20160609
I'll try to gcc-6 on Gentoo later.
