[Bug rtl-optimization/16104] [3.4/3.5 regression] ICE in reload_cse_simplify_operands, at postreload.c:378 with SSE2 code on -O2

[reichelt at gcc dot gnu dot org]

------- Additional Comments From reichelt at gcc dot gnu dot org  2004-06-25 09:30 -------
Here's an even shorter testcase which crashes with the 3.4 branch
and mainline:

===========================================================
typedef int __m64 __attribute__ ((__mode__ (__V2SI__)));

int foo()
{
    return (long long)(__m64)(0ll);
}
===========================================================

PR16104B.c: In function `foo':
PR16104B.c:5: internal compiler error: in convert_move, at expr.c:585
Please submit a full bug report, [etc.]

Before 3.4 the code was rejected (errorneously IMHO):

PR16104B.c: In function `foo':
PR16104B.c:5: error: can't convert between vector values of different size


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16104