From: bje <bje@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 30 Nov 2009 10:19:20 +0000 (+0000)
Subject: 	* mark_rts.c (GC_approx_sp): Use __builtin_frame_address when
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=8a2d350d6a666c0d11b6289cce593f9c25c1cb42;p=gc

	* mark_rts.c (GC_approx_sp): Use __builtin_frame_address when
	compiling with GCC rather than taking the address of a local
	variable.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@154771 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/ChangeLog b/ChangeLog
index 5b615d95..03e51589 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2009-11-30  Ben Elliston  <bje@au.ibm.com>
+
+	* mark_rts.c (GC_approx_sp): Use __builtin_frame_address when
+	compiling with GCC rather than taking the address of a local
+	variable.
+
 2009-11-30  Ben Elliston  <bje@au.ibm.com>
 
 	* os_dep.c: Use the POSIX signal API in preference to the BSD API.
diff --git a/mark_rts.c b/mark_rts.c
index 4074879a..7a9fb8f2 100644
--- a/mark_rts.c
+++ b/mark_rts.c
@@ -376,7 +376,13 @@ ptr_t GC_approx_sp()
 #   ifdef _MSC_VER
 #     pragma warning(disable:4172)
 #   endif
-    return((ptr_t)(&dummy));
+#ifdef __GNUC__
+    /* Eliminate a warning from GCC about taking the address of a
+       local variable.  */
+    return __builtin_frame_address (0);
+#else
+    return ((ptr_t)(&dummy));
+#endif /* __GNUC__ */
 #   ifdef _MSC_VER
 #     pragma warning(default:4172)
 #   endif