From: Ziemowit Laski <zlaski@apple.com>
Date: Fri, 10 Sep 2004 06:40:15 +0000 (+0000)
Subject: typeck.c (build_c_cast): Preserve the cast if casting to and from an Objective-C... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2e2da46727a4b1414d5f2f8d2a016a8609268abe;p=gcc.git

typeck.c (build_c_cast): Preserve the cast if casting to and from an Objective-C type.

[gcc/cp/ChangeLog]
2004-09-09  Ziemowit Laski  <zlaski@apple.com>

        * typeck.c (build_c_cast): Preserve the cast if casting
        to and from an Objective-C type.

From-SVN: r87277
---

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 43c58aa5ed0..08b32a26a65 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,8 @@
+2004-09-09  Ziemowit Laski  <zlaski@apple.com>
+
+	* typeck.c (build_c_cast): Preserve the cast if casting
+	to and from an Objective-C type.
+
 2004-09-09  Ziemowit Laski  <zlaski@apple.com>
 
 	* Make-lang.in (cp/typeck.o): Depend on c-common.h.
diff --git a/gcc/cp/typeck.c b/gcc/cp/typeck.c
index 94e903db1c8..f4d1679557a 100644
--- a/gcc/cp/typeck.c
+++ b/gcc/cp/typeck.c
@@ -4829,6 +4829,13 @@ build_c_cast (tree type, tree expr)
       return t;
     }
 
+  /* Casts to a (pointer to a) specific ObjC class (or 'id' or
+     'Class') should always be retained, because this information aids
+     in method lookup.  */
+  if (objc_is_object_ptr (type)
+      && objc_is_object_ptr (TREE_TYPE (expr)))
+    return build_nop (type, expr);
+
   /* build_c_cast puts on a NOP_EXPR to make the result not an lvalue.
      Strip such NOP_EXPRs if VALUE is being used in non-lvalue context.  */
   if (TREE_CODE (type) != REFERENCE_TYPE