re PR sanitizer/61095 (miscompile: tsan is broken in gcc trunk, works in 4.9)

gcc/testsuite/
	PR tree-optimization/61095
	* gcc.dg/torture/pr61095.c: New test.

From-SVN: r210203

gcc/testsuite/ChangeLog

+2014-05-08  Richard Sandiford  <rdsandiford@googlemail.com>
+
+	PR tree-optimization/61095
+	* gcc.dg/torture/pr61095.c: New test.
+
 2014-05-04  Thomas Preud'homme  <thomas.preudhomme@arm.com>
 
 	PR middle-end/39246

gcc/testsuite/gcc.dg/torture/pr61095.c

+/* { dg-do run } */
+/* { dg-require-effective-target lp64 } */
+
+extern void __attribute__ ((noreturn)) abort (void);
+
+int __attribute__ ((noinline, noclone))
+foo (unsigned long addr) {
+    unsigned long *p = (unsigned long*)((addr & 0xffff83fffffffff8UL) * 4);
+    unsigned long xxx = (unsigned long)(p + 1);
+    return xxx >= 0x3c000000000UL;
+}
+
+int
+main (void)
+{
+  if (foo (0))
+    abort ();
+  if (foo (0x7c0000000000UL))
+    abort ();
+  if (!foo (0xfc0000000000UL))
+    abort ();
+  return 0;
+}