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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-6.c | |
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Diffstat (limited to 'gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-6.c')
-rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-6.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-6.c b/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-6.c new file mode 100644 index 000000000..f643c5c72 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/builtin-prefetch-6.c @@ -0,0 +1,46 @@ +/* Test that __builtin_prefetch does no harm. + + Data prefetch should not fault if used with an invalid address. */ + +#include <limits.h> + +#define ARRSIZE 65 +int *bad_addr[ARRSIZE]; +int arr_used; + +/* Fill bad_addr with a range of values in the hopes that on any target + some will be invalid addresses. */ +void +init_addrs (void) +{ + int i; + int bits_per_ptr = sizeof (void *) * 8; + for (i = 0; i < bits_per_ptr; i++) + bad_addr[i] = (void *)(1UL << i); + arr_used = bits_per_ptr + 1; /* The last element used is zero. */ +} + +void +prefetch_for_read (void) +{ + int i; + for (i = 0; i < ARRSIZE; i++) + __builtin_prefetch (bad_addr[i], 0, 0); +} + +void +prefetch_for_write (void) +{ + int i; + for (i = 0; i < ARRSIZE; i++) + __builtin_prefetch (bad_addr[i], 1, 0); +} + +int +main () +{ + init_addrs (); + prefetch_for_read (); + prefetch_for_write (); + exit (0); +} |