diff options
Diffstat (limited to 'gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-1.c')
-rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-1.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-1.c b/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-1.c new file mode 100644 index 000000000..4ee05a94d --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-1.c @@ -0,0 +1,69 @@ +/* Test that __builtin_prefetch does no harm. + + Prefetch using all valid combinations of rw and locality values. + These must be compile-time constants. */ + +#define NO_TEMPORAL_LOCALITY 0 +#define LOW_TEMPORAL_LOCALITY 1 +#define MODERATE_TEMPORAL_LOCALITY 1 +#define HIGH_TEMPORAL_LOCALITY 3 + +#define WRITE_ACCESS 1 +#define READ_ACCESS 0 + +enum locality { none, low, moderate, high }; +enum rw { read, write }; + +int arr[10]; + +void +good_const (const int *p) +{ + __builtin_prefetch (p, 0, 0); + __builtin_prefetch (p, 0, 1); + __builtin_prefetch (p, 0, 2); + __builtin_prefetch (p, READ_ACCESS, 3); + __builtin_prefetch (p, 1, NO_TEMPORAL_LOCALITY); + __builtin_prefetch (p, 1, LOW_TEMPORAL_LOCALITY); + __builtin_prefetch (p, 1, MODERATE_TEMPORAL_LOCALITY); + __builtin_prefetch (p, WRITE_ACCESS, HIGH_TEMPORAL_LOCALITY); +} + +void +good_enum (const int *p) +{ + __builtin_prefetch (p, read, none); + __builtin_prefetch (p, read, low); + __builtin_prefetch (p, read, moderate); + __builtin_prefetch (p, read, high); + __builtin_prefetch (p, write, none); + __builtin_prefetch (p, write, low); + __builtin_prefetch (p, write, moderate); + __builtin_prefetch (p, write, high); +} + +void +good_expr (const int *p) +{ + __builtin_prefetch (p, 1 - 1, 6 - (2 * 3)); + __builtin_prefetch (p, 1 + 0, 1 + 2); +} + +void +good_vararg (const int *p) +{ + __builtin_prefetch (p, 0, 3); + __builtin_prefetch (p, 0); + __builtin_prefetch (p, 1); + __builtin_prefetch (p); +} + +int +main () +{ + good_const (arr); + good_enum (arr); + good_expr (arr); + good_vararg (arr); + exit (0); +} |