Fix profile corruption with -O1 (PR gcov-profile/79259)

2017-01-30  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/79259
	* opts.c (common_handle_option): Enable flag_ipa_bit_cp w/
	-fprofile-generate.
2017-01-30  Martin Liska  <mliska@suse.cz>

	PR gcov-profile/79259
	* g++.dg/tree-prof/pr79259.C: New test.

From-SVN: r245031

gcc/ChangeLog

 2017-01-30  Martin Liska  <mliska@suse.cz>
 
+	PR gcov-profile/79259
+	* opts.c (common_handle_option): Enable flag_ipa_bit_cp w/
+	-fprofile-generate.
+
+2017-01-30  Martin Liska  <mliska@suse.cz>
+
 	PR bootstrap/78985
 	* config/aarch64/cortex-a57-fma-steering.c (func_fma_steering::analyze):
 	Initialize variables with NULL value.

gcc/opts.c

@@ -2150,6 +2150,8 @@ common_handle_option (struct gcc_options *opts,
 	opts->x_flag_profile_values = value;
       if (!opts_set->x_flag_inline_functions)
 	opts->x_flag_inline_functions = value;
+      if (!opts_set->x_flag_ipa_bit_cp)
+	opts->x_flag_ipa_bit_cp = value;
       /* FIXME: Instrumentation we insert makes ipa-reference bitmaps
 	 quadratic.  Disable the pass until better memory representation
 	 is done.  */

gcc/testsuite/ChangeLog

+2017-01-30  Martin Liska  <mliska@suse.cz>
+
+	PR gcov-profile/79259
+	* g++.dg/tree-prof/pr79259.C: New test.
+
 2017-01-30  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/79276

gcc/testsuite/g++.dg/tree-prof/pr79259.C

+/* { dg-options "-O1" } */
+
+inline bool
+a (int b)
+{
+  return (b & 5) != b;
+}
+int c;
+int
+fn2 ()
+{
+  if (a (c == 0))
+    return 0;
+}
+
+int main()
+{
+  fn2();
+}
+