diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/vect/wrapv-vect-reduc-dot-s8.c')
-rw-r--r-- | gcc/testsuite/gcc.dg/vect/wrapv-vect-reduc-dot-s8.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/vect/wrapv-vect-reduc-dot-s8.c b/gcc/testsuite/gcc.dg/vect/wrapv-vect-reduc-dot-s8.c new file mode 100644 index 0000000..b11b9c7 --- /dev/null +++ b/gcc/testsuite/gcc.dg/vect/wrapv-vect-reduc-dot-s8.c @@ -0,0 +1,108 @@ +/* { dg-require-effective-target vect_int } */ + +#include <stdarg.h> +#include "tree-vect.h" + +#define N 64 + +#define DOT1 43680 +#define DOT2 -21856 +#define DOT3 43680 + +signed char X[N] __attribute__ ((__aligned__(16))); +signed char Y[N] __attribute__ ((__aligned__(16))); + +/* char->short->int dot product. + The dot-product pattern should be detected. + Vectorizable on vect_sdot_qi targets (targets that support dot-product of + signed chars). + + In the future could also be vectorized as widening-mult + widening-summation, + or with type-conversion support. + */ +int +foo1(int len) { + int i; + int result = 0; + short prod; + + for (i=0; i<len; i++) { + prod = X[i] * Y[i]; + result += prod; + } + return result; +} + +/* 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 when the accumulator is int. + + In the future could also be vectorized as widening-mult + summation, + or with type-conversion support. + */ +short +foo2(int len) { + int i; + short result = 0; + + for (i=0; i<len; i++) { + result += (X[i] * Y[i]); + } + return result; +} + +/* char->int->int dot product. + Not detected as a dot-product pattern. + Currently fails to be vectorized due to presence of type conversions. */ +int +foo3(int len) { + int i; + int result = 0; + + for (i=0; i<len; i++) { + result += (X[i] * Y[i]); + } + return result; +} + +int main (void) +{ + int i, dot1, dot3; + short dot2; + + check_vect (); + + for (i=0; i<N; i++) { + X[i] = i; + Y[i] = 64-i; + } + + dot1 = foo1 (N); + if (dot1 != DOT1) + abort (); + + dot2 = foo2 (N); + if (dot2 != DOT2) + abort (); + + dot3 = foo3 (N); + if (dot3 != DOT3) + abort (); + + return 0; +} + +/* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 2 "vect" } } */ + +/* When vectorizer is enhanced to vectorize foo2 (accumulation into short) for targets + that support accumulation into int (ia64) we'd have: +dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { target vect_sdot_qi } } +*/ +/* In the meantime expect: */ +/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { xfail *-*-* } } } */ +/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_sdot_qi } } } */ + +/* { dg-final { cleanup-tree-dump "vect" } } */ |