obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 52 insertions, 0 deletions

diff --git a/gcc/testsuite/obj-c++.dg/proto-lossage-4.mm b/gcc/testsuite/obj-c++.dg/proto-lossage-4.mm
new file mode 100644
index 000000000..9f94754ca
--- /dev/null
+++ b/gcc/testsuite/obj-c++.dg/proto-lossage-4.mm
@@ -0,0 +1,52 @@
+/* Test for situations in which protocol conformance information
+   may be lost while casting.  */
+/* Author: Ziemowit Laski <zlaski@apple.com>.  */
+/* { dg-do compile } */
+
+/* One-line substitute for objc/objc.h */
+typedef struct objc_object { struct objc_class *class_pointer; } *id;
+
+@protocol Proto
+- (long)someValue;
+@end
+
+@interface Obj
+- (long)anotherValue;
+@end
+
+long foo(void) {
+  long receiver = 2;
+  Obj *objrcvr;
+  Obj <Proto> *objrcvr2;
+
+  /* NB: Since 'receiver' is an invalid ObjC message receiver, the compiler
+     should warn but then search for methods as if we were messaging 'id'.  */
+
+  receiver += [receiver someValue]; /* { dg-warning "invalid receiver type .long int." } */
+  receiver += [receiver anotherValue]; /* { dg-warning "invalid receiver type .long int." } */
+
+  receiver += [(Obj *)receiver someValue]; /* { dg-warning ".Obj. may not respond to .\\-someValue." } */
+/* { dg-error "invalid conversion" "" { target *-*-* } 28 } */
+
+  receiver += [(Obj *)receiver anotherValue];
+  receiver += [(Obj <Proto> *)receiver someValue];
+  receiver += [(Obj <Proto> *)receiver anotherValue];
+  receiver += [objrcvr someValue]; /* { dg-warning ".Obj. may not respond to .\\-someValue." } */
+/* { dg-error "invalid conversion" "" { target *-*-* } 34 } */
+
+  receiver += [objrcvr anotherValue];
+  receiver += [(Obj <Proto> *)objrcvr someValue];
+  receiver += [(Obj <Proto> *)objrcvr anotherValue];
+  receiver += [objrcvr2 someValue];
+  receiver += [objrcvr2 anotherValue];
+  receiver += [(Obj *)objrcvr2 someValue]; /* { dg-warning ".Obj. may not respond to .\\-someValue." } */
+/* { dg-error "invalid conversion" "" { target *-*-* } 42 } */
+
+  receiver += [(Obj *)objrcvr2 anotherValue];
+
+  return receiver;
+}
+
+/* { dg-warning "Messages without a matching method signature" "" { target *-*-* } 0 } */
+/* { dg-warning "will be assumed to return .id. and accept" "" { target *-*-* } 0 } */
+/* { dg-warning ".\.\.\.. as arguments" "" { target *-*-* } 0 } */