| /* { dg-require-effective-target vect_int } */ |
| |
| #include <stdarg.h> |
| #include "tree-vect.h" |
| |
| #define N 64 |
| |
| #define DOT -21856 |
| |
| signed 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}; |
| signed 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}; |
| |
| /* char->short->short dot product. |
| The dot-product pattern should be detected. |
| Should be vectorized on vect_sdot_qi targets (targets that support |
| dot-product of signed char). |
| This test currently fails to vectorize on targets that support |
| dot-product of chars into and int accumulator. |
| Can also be vectorized as widening-mult + summation, |
| or with type-conversion support. |
| */ |
| __attribute__ ((noinline)) short |
| foo(int len) { |
| int i; |
| short result = 0; |
| |
| for (i=0; i<len; i++) { |
| result += (X[i] * Y[i]); |
| } |
| return result; |
| } |
| |
| int main (void) |
| { |
| int i; |
| short dot; |
| |
| check_vect (); |
| |
| dot = foo (N); |
| if (dot != DOT) |
| abort (); |
| |
| return 0; |
| } |
| |
| /* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" } } */ |
| /* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 1 "vect" } } */ |
| |
| /* When vectorizer is enhanced to vectorize accumulation into short for targets |
| that support accumulation into int (e.g. ia64) we'd have: |
| dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_sdot_qi } } |
| */ |
| /* In the meantime expect: */ |
| /* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_widen_mult_qi_to_hi || vect_unpack } } } } */ |
| |