From af4bd9204179f9820bc4b17099fc75a4f603abf8 Mon Sep 17 00:00:00 2001 From: Hans-Peter Nilsson Date: Thu, 16 Aug 2012 22:05:32 +0000 Subject: [PATCH] re PR middle-end/54261 (reverse sync/atomic operators when only sync_compare_and_swap_optab libfuncs implemented) PR middle-end/54261 * gcc.dg/torture/pr54261-1.c: New test. From-SVN: r190455 --- gcc/testsuite/ChangeLog | 5 +++ gcc/testsuite/gcc.dg/torture/pr54261-1.c | 42 ++++++++++++++++++++++++ 2 files changed, 47 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/torture/pr54261-1.c diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 9c454bf82904..6e4d352d424c 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2012-08-17 Hans-Peter Nilsson + + PR middle-end/54261 + * gcc.dg/torture/pr54261-1.c: New test. + 2012-08-15 Janus Weil PR fortran/54243 diff --git a/gcc/testsuite/gcc.dg/torture/pr54261-1.c b/gcc/testsuite/gcc.dg/torture/pr54261-1.c new file mode 100644 index 000000000000..571727b0c952 --- /dev/null +++ b/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); +} -- 2.47.2