diff options
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.dg/torture/pr54261-1.c')
-rw-r--r-- | gcc-4.9/gcc/testsuite/gcc.dg/torture/pr54261-1.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/torture/pr54261-1.c b/gcc-4.9/gcc/testsuite/gcc.dg/torture/pr54261-1.c new file mode 100644 index 000000000..571727b0c --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gcc.dg/torture/pr54261-1.c @@ -0,0 +1,42 @@ +/* { dg-do run } */ +/* { dg-additional-options "-DSYNC_FALLBACK" { target { ! cas_int } } } */ + +#ifdef SYNC_FALLBACK +/* The SYNC_FALLBACK code is just so we don't have to restrict this test + to any subset of targets. For targets with no atomics support at + all, the cas_int effective-target is false and the fallback provides + a PASS. Where the bug trigs (at the time this test-case was added), + cas_int is also false but the fallback isn't used. */ +__attribute__((__noinline__, __noclone__)) +int +# if __INT_MAX__ == 0x7fff + __sync_fetch_and_add_2 +# else + __sync_fetch_and_add_4 +# endif + (int *at, int val) +{ + int tmp = *at; + asm (""); + *at = tmp + val; + return tmp; +} +#endif + +__attribute__((__noinline__, __noclone__)) +void g (int *at, int val) +{ + asm (""); + __sync_fetch_and_add (at, val); +} + +int main(void) +{ + int x = 41; + int a = 1; + g (&x, a); + + if (x != 42) + __builtin_abort (); + __builtin_exit (0); +} |