https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81389
Bug ID: 81389
Summary: _mm_cmpestri segfault on -O0
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rockeet at gmail dot com
Target Milestone: ---
With option -O0, intrinsic _mm_cmpestri generate a mmload and a _mm_cmpestri,
in which mmload raise a CPU hardware exception.
The reason is: mmload require memory align to 16, but _mm_cmpestri directly on
memory does not require memory align.
It is OK with option -O3, because the compiler does not generate mmload, it
generate an mm_cmpestri directly on memory.
I had noticed this bug in gcc-4.7, serveral years later, the bug is still
there(gcc-6.3)...
