gcc -O2 -mmmx i386-mmx-5.c
GCC fails thus:
---------------------------------------------
i386-mmx-5.c: In function 'main':
i386-mmx-5.c:15: internal compiler error: in simplify_binary_operation, at
simplify-rtx.c:2151
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
---------------------------------------------
/* { dg-do run { target i?86-*-* x86_64-*-* } } */
/* { dg-options "-O2 -mmmx" } */
#include <mmintrin.h>
#include <stdlib.h>
__m64 global_mask;
main()
{
__m64 zero = _mm_setzero_si64();
__m64 mask = _mm_cmpeq_pi8( zero, zero );
mask = _mm_unpacklo_pi8( mask, zero );
global_mask = mask;
exit(0);
}
-----------------------------------------------------
--
Summary: -O2 ICE for MMX testcase
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: stuart at apple dot com
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i686-linux-gnu
GCC host triplet: i686-linux-gnu
GCC target triplet: i686-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17853
