gcc/testsuite/gcc.dg/vect/pr88497-5.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target vect_int } */
   3 /* { dg-require-effective-target powerpc_altivec_ok { target { powerpc*-*-* } } } */
   4 /* { dg-require-effective-target sse2 { target { i?86-*-* x86_64-*-* } } } */
   5 /* { dg-additional-options "-O2 -ffast-math -fdump-tree-reassoc1" } */
   6 /* { dg-additional-options "-maltivec" { target { powerpc*-*-* } } } */
   7 /* { dg-additional-options "-msse2" { target { i?86-*-* x86_64-*-* } } } */
   8
   9 /* To test reassoc can undistribute vector bit_field_ref on bitwise XOR.
  10
  11    v1, v2, v3, v4 of type vector int.
  12
  13    reassoc transforms
  14
  15      accumulator ^= v1[0] ^ v1[1] ^ v1[2] ^ v1[3] ^
  16                     v2[0] ^ v2[1] ^ v2[2] ^ v2[3] ^
  17                     v3[0] ^ v3[1] ^ v3[2] ^ v3[3] ^
  18                     v4[0] ^ v4[1] ^ v4[2] ^ v4[3] ;
  19
  20    into:
  21
  22      T = v1 ^ v2 ^ v3 ^ v4;
  23      accumulator ^= T[0] ^ T[1] ^ T[2] ^ T[3];
  24
  25    Fewer bit_field_refs, only four for 128 or more bits vector.  */
  26
  27 typedef int v4si __attribute__ ((vector_size (16)));
  28 int
  29 test (int accumulator, v4si v1, v4si v2, v4si v3, v4si v4)
  30 {
  31   accumulator ^= v1[0] ^ v1[1] ^ v1[2] ^ v1[3];
  32   accumulator ^= v2[0] ^ v2[1] ^ v2[2] ^ v2[3];
  33   accumulator ^= v3[0] ^ v3[1] ^ v3[2] ^ v3[3];
  34   accumulator ^= v4[0] ^ v4[1] ^ v4[2] ^ v4[3];
  35   return accumulator;
  36 }
  37 /* { dg-final { scan-tree-dump-times "BIT_FIELD_REF" 4 "reassoc1" { target { powerpc*-*-* i?86-*-* x86_64-*-* } } } } */