[PATCH] Initialize split_branch_probability (PR target/82863).

[Martin Liška]

Hi.

Following patch initializes global profile_probability.

Ready for trunk after tests?
Thanks,
Martin

gcc/ChangeLog:

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

        PR target/82863
        * emit-rtl.c: Initialize split_branch_probability to
        uninitialized.

gcc/testsuite/ChangeLog:

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

        * gcc.dg/pr82863.c: New test.
---
 gcc/emit-rtl.c                 |  3 ++-
 gcc/testsuite/gcc.dg/pr82863.c | 12 ++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.dg/pr82863.c



diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index cfe0fcec8e2..4ec3723ef9d 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -191,7 +191,8 @@ static rtx gen_const_vector (machine_mode, int);
 static void copy_rtx_if_shared_1 (rtx *orig);
 
 /* Probability of the conditional branch currently proceeded by try_split.  */
-profile_probability split_branch_probability;
+profile_probability split_branch_probability
+  = profile_probability::uninitialized ();
 
 /* Returns a hash code for X (which is a really a CONST_INT).  */
 
diff --git a/gcc/testsuite/gcc.dg/pr82863.c b/gcc/testsuite/gcc.dg/pr82863.c
new file mode 100644
index 00000000000..b4028169a96
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr82863.c
@@ -0,0 +1,12 @@
+/* PR c/82167 */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+typedef long long a;
+a b;
+float
+c ()
+{
+  float d = b > 0;
+  return d;
+}