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* [Bug c/23963] New: MMX intrinsics cause ICE in trunc_int_for_mode
@ 2005-09-19 11:07 sam at zoy dot org
  2005-09-19 14:48 ` [Bug target/23963] [4.0 Regression] " pinskia at gcc dot gnu dot org
                   ` (2 more replies)
  0 siblings, 3 replies; 8+ messages in thread
From: sam at zoy dot org @ 2005-09-19 11:07 UTC (permalink / raw)
  To: gcc-bugs

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The following code causes an ICE with any -O flag except -O0:

#include <mmintrin.h>
#include <stdint.h>
int main(int argc, char *argv[]) {
    __m64 a, b, c;
    a = b = c = (__m64)(uint64_t)argc; /* Load with arbitrary values */
    a = _mm_slli_pi16(a, 3);
    a = _mm_adds_pi16(a, b);
    c = _mm_srli_pi16(c, 8);
    c = _mm_slli_pi16(c, 3);
    b = _mm_adds_pi16(b, c);
    a = _mm_unpacklo_pi8(a, b);
    return (int)(uint64_t)a;
}

Resulting error is:

crashmmx.c: In function ‘main’:
crashmmx.c:16: internal compiler error: in trunc_int_for_mode, at explow.c:53

-- 
           Summary: MMX intrinsics cause ICE in trunc_int_for_mode
           Product: gcc
           Version: 4.0.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: sam at zoy dot org
                CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: i486-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23963


^ permalink raw reply	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2007-02-03 15:43 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <bug-23963-6339@http.gcc.gnu.org/bugzilla/>
2006-03-11  3:20 ` [Bug target/23963] [4.0 Regression] MMX intrinsics cause ICE in trunc_int_for_mode mmitchel at gcc dot gnu dot org
2006-06-05  6:18 ` [Bug target/23963] [4.0/4.1 " pinskia at gcc dot gnu dot org
2006-09-13  3:34 ` bangerth at dealii dot org
2006-10-17 13:39 ` [Bug target/23963] [4.0 " rguenth at gcc dot gnu dot org
2007-02-03 15:43 ` gdr at gcc dot gnu dot org
2005-09-19 11:07 [Bug c/23963] New: " sam at zoy dot org
2005-09-19 14:48 ` [Bug target/23963] [4.0 Regression] " pinskia at gcc dot gnu dot org
2005-09-20 22:28 ` sam at zoy dot org
2005-09-27 16:23 ` mmitchel at gcc dot gnu dot org

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