Mercurial > hg > CbC > CbC_gcc
diff gcc/testsuite/gcc.dg/vect/vect-over-widen-5.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/testsuite/gcc.dg/vect/vect-over-widen-5.c Thu Oct 25 07:37:49 2018 +0900 @@ -0,0 +1,52 @@ +/* { dg-require-effective-target vect_int } */ +/* { dg-require-effective-target vect_shift } */ +/* { dg-require-effective-target vect_pack_trunc } */ +/* { dg-require-effective-target vect_unpack } */ + +#include "tree-vect.h" + +#ifndef SIGNEDNESS +#define SIGNEDNESS signed +#define BASE_B -128 +#define BASE_C -100 +#endif + +#define N 50 + +/* Both range analysis and backward propagation from the truncation show + that these calculations can be done in SIGNEDNESS short. */ +void __attribute__ ((noipa)) +f (SIGNEDNESS char *restrict a, SIGNEDNESS char *restrict b, + SIGNEDNESS char *restrict c) +{ + /* Deliberate use of signed >>. */ + for (int i = 0; i < N; ++i) + a[i] = (b[i] + c[i]) >> 1; +} + +int +main (void) +{ + check_vect (); + + SIGNEDNESS char a[N], b[N], c[N]; + for (int i = 0; i < N; ++i) + { + b[i] = BASE_B + i * 5; + c[i] = BASE_C + i * 4; + asm volatile ("" ::: "memory"); + } + f (a, b, c); + for (int i = 0; i < N; ++i) + if (a[i] != (BASE_B + BASE_C + i * 9) >> 1) + __builtin_abort (); + + return 0; +} + +/* { dg-final { scan-tree-dump {Splitting statement} "vect" } } */ +/* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* \+ } "vect" } } */ +/* { dg-final { scan-tree-dump {vect_recog_over_widening_pattern: detected:[^\n]* >> 1} "vect" } } */ +/* { dg-final { scan-tree-dump {vect_recog_cast_forwprop_pattern: detected:[^\n]* \(signed char\)} "vect" } } */ +/* { dg-final { scan-tree-dump-not {vector[^ ]* int} "vect" } } */ +/* { dg-final { scan-tree-dump-times "vectorized 1 loop" 1 "vect" } } */