* c-common.c (shadow_warning): New function, moved from cp/decl.c.

	* c-common.h (shadow_warning): New.
	* c-decl.c: Include c-common.h.
	(warn_if_shadowing): New, broken out of pushdecl.
	(pushdecl): Use warn_if_shadowing.
	(store_parm_decls): Prevent duplicate -Wshadow warnings.
cp:
	* decl.c: Include c-common.h.
	(shadow_warning): Move to c-common.c.
testsuite:
	* gcc.dg/Wshadow-1.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@47701 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 32 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/Wshadow-1.c b/gcc/testsuite/gcc.dg/Wshadow-1.c
new file mode 100644
index 00000000000..63808aa9c89
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/Wshadow-1.c
@@ -0,0 +1,32 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.  */
+
+/* { dg-do compile } */
+/* { dg-options "-Wshadow -pedantic-errors" } */
+
+/* Source: Neil Booth, 5 Dec 2001.  */
+
+int decl1;			/* { dg-warning "shadowed declaration" } */
+void foo (double decl1)		/* { dg-warning "shadows a global decl" } */
+{				
+}
+
+void foo1 (int d)
+{
+  double d;	 /* { dg-bogus "warning" "warning in place of error" } */
+  /* { dg-error "shadows a parameter" "" { target *-*-* } 15 } */
+}
+
+void foo2 (int d)		/* { dg-warning "shadowed declaration" } */
+{
+  {
+    double d;			/* { dg-warning "shadows a parameter" } */
+  }
+}
+
+void foo3 ()
+{
+  int local;			/* { dg-warning "shadowed declaration" } */
+  {
+    int local;			/* { dg-warning "shadows a previous local" } */
+  }
+}