(start_function): Warn if volatile fn returns non-void.

From-SVN: r5022

(start_function): Warn if volatile fn returns non-void.
From-SVN: r5022
6df4a7b9 · Richard Stallman · 43a92256 · 6df4a7b9
Commit 6df4a7b9 authored Jul 28, 1993 by Richard Stallman
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gcc/c-decl.c
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--- a/gcc/c-decl.c
+++ b/gcc/c-decl.c
@@ -5648,6 +5648,10 @@ start_function (declspecs, declarator, nested)

  announce_function (decl1);

+  if (TREE_THIS_VOLATILE (decl)
+      && TREE_TYPE (decl) != void_type_node)
+    warning ("volatile function returns non-void value");
+
  if (TYPE_SIZE (TREE_TYPE (TREE_TYPE (decl1))) == 0)
    {
      error ("return-type is an incomplete type");