------- Comment #19 from hjl dot tools at gmail dot com 2010-07-14 15:52
-------
(In reply to comment #15)
> I found the similar case with gcc 4.4.4 of MacPorts and gcc 4.4.0 of MinGW.
>
> -- begin testcase --
> // g++ -O -msse2 test.cpp
> typedef long long __m128i __attribute__ ((__vector_size__ (16),
> __may_alias__));
>
> struct vec
> {
> __m128i v;
>
> static vec load(const int * p)
> { return (__m128i) __builtin_ia32_loaddqu((char const *)p); }
>
> const int & operator [](int i) const
> {
> union u {
> __m128i v;
> int e[4];
> };
>
> return ((const u &)v).e[i];
> }
>
> vec() {}
> vec(const __m128i & a) : v(a) {}
> };
>
> extern "C" {
> int printf (const char*, ...);
> }
>
> int main( int argc, char * argv[] )
> {
> __attribute__((aligned(16))) int data[] =
> { 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5 };
>
> vec a = vec::load(data);
>
> printf("v: %d, %d, %d, %d\n", a[0], a[1], a[2], a[3]);
>
> return 0;
> }
> -- end testcase --
>
> -- begin output --
> v: 16, 16, 14, 14
> -- end output --
>
This is caused by revision 134947:
http://gcc.gnu.org/ml/gcc-cvs/2008-05/msg00107.html
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44900
