gcc/testsuite/gcc.dg/vect/vect-widen-mult-u8-u32.c

   1 /* { dg-additional-options "--param vect-epilogues-nomask=0" } */
   2 /* { dg-require-effective-target vect_int } */
   3 /* { dg-additional-options "-mlasx" { target loongarch*-*-* } } */
   4
   5 #include <stdarg.h>
   6 #include "tree-vect.h"
   7
   8 #define N 64
   9
  10 unsigned char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  11 unsigned char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
  12 unsigned int result[N];
  13
  14 /* unsigned char-> unsigned int widening-mult.  */
  15 __attribute__ ((noinline)) int
  16 foo (int len) {
  17   int i;
  18
  19   for (i=0; i<len; i++) {
  20     result[i] = X[i] * Y[i];
  21   }
  22 }
  23
  24 int main (void)
  25 {
  26   int i;
  27
  28   check_vect ();
  29
  30   for (i=0; i<N; i++) {
  31     X[i] = i;
  32     Y[i] = 64-i;
  33     __asm__ volatile ("");
  34   }
  35
  36   foo (N);
  37
  38 #pragma GCC novector
  39   for (i=0; i<N; i++) {
  40     if (result[i] != X[i] * Y[i])
  41       abort ();
  42   }
  43
  44   return 0;
  45 }
  46
  47 /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_mult_qi_to_hi || vect_unpack } } } } */
  48 /* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 1 "vect" { target vect_widen_mult_qi_to_hi_pattern } } } */
  49 /* { dg-final { scan-tree-dump-times "widen_mult pattern recognized" 1 "vect" { target vect_widen_mult_qi_to_hi_pattern } } } */
  50