PR target/61713
* gcc/optabs.c (expand_atomic_test_and_set): Do not try to emit
move to subtarget in serial version if result is ignored.
PR target/61713
* gcc.dg/pr61756.c: New test.
From-SVN: r213555
+2014-08-04 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
+
+ PR target/61713
+ * gcc/optabs.c (expand_atomic_test_and_set): Do not try to emit
+ move to subtarget in serial version if result is ignored.
+
2014-07-14 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
Kyrylo Tkachov <kyrylo.tkachov@arm.com>
perform the operation. */
if (!ret)
{
- emit_move_insn (subtarget, mem);
+ /* If the result is ignored skip the move to target. */
+ if (subtarget != const0_rtx)
+ emit_move_insn (subtarget, mem);
+
emit_move_insn (mem, trueval);
ret = subtarget;
}
+2014-08-04 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
+
+ PR target/61713
+ * gcc.dg/pr61756.c: New test.
+
2014-08-04 Tom de Vries <tom@codesourcery.com>
* gcc.dg/cproj-fails-with-broken-glibc.c: Use xfail for broken glibc
--- /dev/null
+/* PR target/61756 */
+
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+/* { dg-options "-O2 -march=armv5" { target arm*-*-* } } */
+
+#include <stdatomic.h>
+
+static volatile atomic_flag guard = ATOMIC_FLAG_INIT;
+
+void
+try_atomic_flag_test_and_set (void)
+{
+ atomic_flag_test_and_set (&guard);
+}