From: Ian Lance Taylor <iant@google.com>
Date: Thu, 12 Dec 2013 02:24:20 +0000 (+0000)
Subject: go-lang.c (go_langhook_post_options): Disable sibling calls by default.
X-Git-Tag: releases/gcc-4.9.0~2125
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0fdd268fbfecb7956d13bff1ce60ef29f4b9d931;p=thirdparty%2Fgcc.git

go-lang.c (go_langhook_post_options): Disable sibling calls by default.

	* go-lang.c (go_langhook_post_options): Disable sibling calls by
	default.

From-SVN: r205915
---

diff --git a/gcc/go/ChangeLog b/gcc/go/ChangeLog
index 0c03656f6b45..db0212cd37d0 100644
--- a/gcc/go/ChangeLog
+++ b/gcc/go/ChangeLog
@@ -1,3 +1,8 @@
+2013-12-11  Ian Lance Taylor  <iant@google.com>
+
+	* go-lang.c (go_langhook_post_options): Disable sibling calls by
+	default.
+
 2013-12-10  Ian Lance Taylor  <iant@google.com>
 
 	* Make-lang.in (check_go_parallelize): Test go-test.exp r* tests
diff --git a/gcc/go/go-lang.c b/gcc/go/go-lang.c
index d207a31f5379..ae133f7ed2e8 100644
--- a/gcc/go/go-lang.c
+++ b/gcc/go/go-lang.c
@@ -270,6 +270,10 @@ go_langhook_post_options (const char **pfilename ATTRIBUTE_UNUSED)
   if (flag_excess_precision_cmdline == EXCESS_PRECISION_DEFAULT)
     flag_excess_precision_cmdline = EXCESS_PRECISION_STANDARD;
 
+  /* Tail call optimizations can confuse uses of runtime.Callers.  */
+  if (!global_options_set.x_flag_optimize_sibling_calls)
+    global_options.x_flag_optimize_sibling_calls = 0;
+
   /* Returning false means that the backend should be used.  */
   return false;
 }