re PR bootstrap/57154 (Bootstrap broken for powerpc64-unknown-linux-gnu)

2013-05-03  Teresa Johnson  <tejohnson@google.com>

	PR bootstrap/57154
	* gcc.dg/pr57154.c: New test.

From-SVN: r198626

gcc/testsuite/ChangeLog

+2013-05-03  Teresa Johnson  <tejohnson@google.com>
+
+	PR bootstrap/57154
+	* gcc.dg/pr57154.c: New test.
+
 2013-05-06  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/57147

gcc/testsuite/gcc.dg/pr57154.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -fschedule-insns" } */
+
+#define PF_FROZEN 0x00010000
+#define likely(x)      __builtin_expect(!!(x), 1)
+
+struct cur
+{
+  unsigned long flags;
+};
+struct cur *cur;
+
+unsigned long freeze_cnt;
+
+extern int foo(void *);
+extern int slow_path(void *);
+
+static inline int freezing(void *p)
+{
+        if (likely(!foo(&freeze_cnt)))
+                return 0;
+        return slow_path(p);
+}
+
+extern int blah(void);
+
+int testcase(int check_kthr_stop)
+{
+  int was_frozen = 0;
+
+  for (;;) {
+    if (!freezing(cur) ||
+        (check_kthr_stop && blah()))
+      cur->flags &= ~PF_FROZEN;
+
+    if (!(cur->flags & PF_FROZEN))
+      break;
+
+    was_frozen = 1;
+  }
+
+  return was_frozen;
+}