Initialize split_branch_probability (PR target/82863).

2017-11-09  Martin Liska  <mliska@suse.cz>

	PR target/82863
	* emit-rtl.c (init_emit_regs): Initialize split_branch_probability to
	uninitialized.
2017-11-09  Martin Liska  <mliska@suse.cz>

	PR target/82863
	* gcc.dg/pr82863.c: New test.

From-SVN: r254574

gcc/ChangeLog

 2017-11-09  Martin Liska  <mliska@suse.cz>
 
+	PR target/82863
+	* emit-rtl.c (init_emit_regs): Initialize split_branch_probability to
+	uninitialized.
+
+2017-11-09  Martin Liska  <mliska@suse.cz>
+
 	PR tree-optimization/82669
 	* sbitmap.h (bmp_iter_set_init): Remove non needed check.
 

gcc/emit-rtl.c

@@ -5952,6 +5952,8 @@ init_emit_regs (void)
 	}
       mode_mem_attrs[i] = attrs;
     }
+
+  split_branch_probability = profile_probability::uninitialized ();
 }
 
 /* Initialize global machine_mode variables.  */

gcc/testsuite/ChangeLog

+2017-11-09  Martin Liska  <mliska@suse.cz>
+
+	PR target/82863
+	* gcc.dg/pr82863.c: New test.
+
 2017-11-09  Hristian Kirtchev  <kirtchev@adacore.com>
 
 	* gnat.dg/unreferenced.adb: New testcase.

gcc/testsuite/gcc.dg/pr82863.c

+/* PR c/82167 */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+typedef long long a;
+a b;
+float
+c ()
+{
+  float d = b > 0;
+  return d;
+}