gcc/testsuite/gcc.target/i386/pr81481.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target ssse3 } */
   3 /* { dg-options "-O2 -fpic -mssse3" } */
   4 /* { dg-final { scan-assembler-not "pshufb\[ \t\]\\(%esp\\)" } } */
   5 #include <immintrin.h>
   6
   7 extern const signed char c[31] __attribute__((visibility("hidden")));
   8
   9 __m128i f(__m128i *x, void *v)
  10 {
  11   int i;
  12   asm("# %0" : "=r"(i));
  13   __m128i t = _mm_loadu_si128((void*)&c[i]);
  14   __m128i xx = *x;
  15   xx =  _mm_shuffle_epi8(xx, t);
  16   asm("# %0 %1 %2" : "+x"(xx) : "r"(c), "r"(i));
  17   return xx;
  18 }