PR middle-end/42674

	* c-decl.c (finish_function): Don't emit -Wreturn-type warnings in
	functions with noreturn attribute.

	* decl.c (finish_function): Don't emit -Wreturn-type warnings in
	functions with noreturn attribute.

	* c-c++-common/pr42674.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@155920 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 29f71b1..ce96cca 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
 2010-01-14  Jakub Jelinek  <jakub@redhat.com>
 
+       PR middle-end/42674
+       * c-decl.c (finish_function): Don't emit -Wreturn-type warnings in
+       functions with noreturn attribute.
+
        PR c++/42608
        * varasm.c (declare_weak): Add weak attribute to decl if it
        doesn't have one already.

diff --git a/gcc/c-decl.c b/gcc/c-decl.c
index a244a83..91d5884 100644 (file)
--- a/gcc/c-decl.c
+++ b/gcc/c-decl.c
@@ -8032,6 +8032,8 @@ finish_function (void)
       && !current_function_returns_value && !current_function_returns_null
       /* Don't complain if we are no-return.  */
       && !current_function_returns_abnormally
+      /* Don't complain if we are declared noreturn.  */
+      && !TREE_THIS_VOLATILE (fndecl)
       /* Don't warn for main().  */
       && !MAIN_NAME_P (DECL_NAME (fndecl))
       /* Or if they didn't actually specify a return type.  */

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index c6e309f..1d13261 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2010-01-14  Jakub Jelinek  <jakub@redhat.com>
+
+       PR middle-end/42674
+       * decl.c (finish_function): Don't emit -Wreturn-type warnings in
+       functions with noreturn attribute.
+
 2010-01-14  Jason Merrill  <jason@redhat.com>
 
        PR c++/42701

diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index e89113a..2409aa3 100644 (file)
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -12541,6 +12541,8 @@ finish_function (int flags)
       && !current_function_returns_value && !current_function_returns_null
       /* Don't complain if we abort or throw.  */
       && !current_function_returns_abnormally
+      /* Don't complain if we are declared noreturn.  */
+      && !TREE_THIS_VOLATILE (fndecl)
       && !DECL_NAME (DECL_RESULT (fndecl))
       && !TREE_NO_WARNING (fndecl)
       /* Structor return values (if any) are set by the compiler.  */

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 5b28449..f4d13be 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2010-01-14  Jakub Jelinek  <jakub@redhat.com>
 
+       PR middle-end/42674
+       * c-c++-common/pr42674.c: New test.
+
        PR c++/42608
        * g++.dg/template/instantiate11.C: New test.
 

diff --git a/gcc/testsuite/c-c++-common/pr42674.c b/gcc/testsuite/c-c++-common/pr42674.c
new file mode 100644 (file)
index 0000000..ae6730c
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/pr42674.c
@@ -0,0 +1,13 @@
+/* PR middle-end/42674 */
+/* { dg-do compile } */
+/* { dg-options "-Wreturn-type" } */
+
+extern void bar (void);
+static int foo (void) __attribute__ ((__noreturn__, __used__));
+
+static int
+foo (void)
+{
+  while (1)
+    bar ();
+}