1/* { dg-require-effective-target vect_int } */ 2 3#include <stdarg.h> 4#include "tree-vect.h" 5 6#define N 64 7 8#define DOT -21856 9 10signed char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63}; 11signed char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__))) = {64,63,62,61,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1}; 12 13/* char->short->short dot product. 14 The dot-product pattern should be detected. 15 Should be vectorized on vect_sdot_qi targets (targets that support 16 dot-product of signed char). 17 This test currently fails to vectorize on targets that support 18 dot-product of chars into and int accumulator. 19 Can also be vectorized as widening-mult + summation, 20 or with type-conversion support. 21 */ 22__attribute__ ((noinline)) short 23foo(int len) { 24 int i; 25 short result = 0; 26 27 for (i=0; i<len; i++) { 28 result += (X[i] * Y[i]); 29 } 30 return result; 31} 32 33int main (void) 34{ 35 int i; 36 short dot; 37 38 check_vect (); 39 40 dot = foo (N); 41 if (dot != DOT) 42 abort (); 43 44 return 0; 45} 46 47/* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */ 48/* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 1 "vect" } } */ 49 50/* When vectorizer is enhanced to vectorize accumulation into short for targets 51 that support accumulation into int (e.g. ia64) we'd have: 52dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_sdot_qi } } 53*/ 54/* In the meantime expect: */ 55/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_mult_qi_to_hi || vect_unpack } } } } */ 56 57/* { dg-final { cleanup-tree-dump "vect" } } */ 58