[Bug target/51955] _mm_setzero_si128 intrinsic causes segfault without -O

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51955

--- Comment #5 from Richard Guenther  2012-01-23 
10:50:52 UTC ---
void _start() {
main();
}

isn't properly aligning the stack for the ABI GCC assumes.  Simply drop it.

[Bug target/51955] _mm_setzero_si128 intrinsic causes segfault without -O

[graphitem at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51955

--- Comment #4 from Dale Weiler  2012-01-23 
03:59:58 UTC ---
(In reply to comment #3)
> This is a bug in how your _start does not realign the stack to 16 byte 
> aligned.
> movdqa%xmm0, -32(%rbp)
> movdqa-32(%rbp), %xmm0
> movdqa%xmm0, -16(%rbp)
> 
> rbp0x7fffe3880x7fffe388
> rsp0x7fffe3880x7fffe388

Interesting, even with alignment it crashes however:
while intptr_t)data)&15))
  data++;

What exactly should be aligned the const char * for kill()?
I'm unsure to what you mean in regards to realigning the stack
for _just _start.

[Bug target/51955] _mm_setzero_si128 intrinsic causes segfault without -O

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51955

Andrew Pinski  changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 Resolution||INVALID

--- Comment #3 from Andrew Pinski  2012-01-23 
02:38:46 UTC ---
This is a bug in how your _start does not realign the stack to 16 byte aligned.
movdqa%xmm0, -32(%rbp)
movdqa-32(%rbp), %xmm0
movdqa%xmm0, -16(%rbp)

rbp0x7fffe3880x7fffe388
rsp0x7fffe3880x7fffe388