From 5bc2d161c3700f4916bcdef05043a8420d8c0ebe Mon Sep 17 00:00:00 2001
From: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 6 Jun 2011 11:46:14 +0000
Subject: [PATCH] 2011-06-06  Mikael Pettersson  <mikpe@it.uu.se>

	PR tree-optimization/49243
	* calls.c (setjmp_call_p): Also check if fndecl has the
	returns_twice attribute.

	* gcc.dg/pr49243.c: New.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@174696 138bc75d-0d04-0410-961f-82ee72b054a4

index f539f66..1c161bf 100644
--- a/gcc/calls.c
+++ b/gcc/calls.c
@@ -548,6 +548,8 @@ special_function_p (const_tree fndecl, int flags)
 int
 setjmp_call_p (const_tree fndecl)
 {
+  if (DECL_IS_RETURNS_TWICE (fndecl))
+    return ECF_RETURNS_TWICE;
   return special_function_p (fndecl, 0) & ECF_RETURNS_TWICE;
 }
 
new file mode 100644
index 0000000..f896b05
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr49243.c
@@ -0,0 +1,25 @@
+/* PR tree-optimization/49243 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -Winline" } */
+
+extern unsigned long jb[];
+extern int my_setjmp(unsigned long jb[]) __attribute__((returns_twice));
+extern int decode(const char*);
+
+static inline int wrapper(const char **s_ptr) /* { dg-warning "(inlining failed|function 'wrapper' can never be inlined because it uses setjmp)" } */
+{
+    if (my_setjmp(jb) == 0) {
+	const char *s = *s_ptr;
+	while (decode(s) != 0)
+	    *s_ptr = ++s;
+	return 0;
+    } else
+	return -1;
+}
+
+void parse(const char *data)
+{
+    const char *s = data;
+    if (!(wrapper(&s) == -1 && (s - data) == 1)) /* { dg-warning "called from here" } */
+	__builtin_abort();
+}
-- 
1.7.0.4