[pushed] Objective-C, NeXT, v2: Correct a regression in code-gen.
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Commit Message
My testing of the GCC-14 release branch revealed an Objective-C
regression in code-gen, the fix has been tested on x86_64, i686
and powerpc darwin, pushed to trunk.
I will shortly apply this to the open branches, since they are
affected too. Given that this is completely local to Darwin and
Objective-C (and pretty trivial too) - would it be acceptable for
GCC-14.1?
thanks
Iain
--- 8< ---
There have been several changes in the ABI of Objective-C which
depend on the OS version targetted. In this case Protocols and
LabelProtocols should be made weak/hidden/extern from macOS 10.7
however there was a mistake in the code causing this to occur
from macOS 10.6. Fixed thus.
gcc/objc/ChangeLog:
* objc-next-runtime-abi-02.cc (WEAK_PROTOCOLS_AFTER): New.
(next_runtime_abi_02_protocol_decl): Use WEAK_PROTOCOLS_AFTER
to determine this ABI change.
(build_v2_protocol_list_address_table): Likewise.
Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
---
gcc/objc/objc-next-runtime-abi-02.cc | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
Comments
On Thu, May 02, 2024 at 01:53:21PM +0100, Iain Sandoe wrote:
> My testing of the GCC-14 release branch revealed an Objective-C
> regression in code-gen, the fix has been tested on x86_64, i686
> and powerpc darwin, pushed to trunk.
>
> I will shortly apply this to the open branches, since they are
> affected too. Given that this is completely local to Darwin and
> Objective-C (and pretty trivial too) - would it be acceptable for
> GCC-14.1?
Can't this just wait for GCC 14.2?
The code has been like that for years, no, and it is ObjC, not a release
critical language.
Jakub
@@ -72,6 +72,7 @@ along with GCC; see the file COPYING3. If not see
#define TAG_MSGSENDSUPER_STRET "objc_msgSendSuper2_stret"
#define USE_FIXUP_BEFORE 100600
+#define WEAK_PROTOCOLS_AFTER 100700
#define TAG_FIXUP "_fixup"
@@ -1025,7 +1026,7 @@ next_runtime_abi_02_protocol_decl (tree p)
/* static struct _objc_protocol _OBJC_Protocol_<mumble>; */
snprintf (buf, BUFSIZE, "_OBJC_Protocol_%s",
IDENTIFIER_POINTER (PROTOCOL_NAME (p)));
- if (flag_next_runtime >= USE_FIXUP_BEFORE)
+ if (flag_next_runtime >= WEAK_PROTOCOLS_AFTER)
{
decl = create_hidden_decl (objc_v2_protocol_template, buf);
DECL_WEAK (decl) = true;
@@ -2315,7 +2316,7 @@ build_v2_protocol_list_address_table (void)
gcc_assert (ref->id && TREE_CODE (ref->id) == PROTOCOL_INTERFACE_TYPE);
snprintf (buf, BUFSIZE, "_OBJC_LabelProtocol_%s",
IDENTIFIER_POINTER (PROTOCOL_NAME (ref->id)));
- if (flag_next_runtime >= USE_FIXUP_BEFORE)
+ if (flag_next_runtime >= WEAK_PROTOCOLS_AFTER)
{
decl = create_hidden_decl (objc_protocol_type, buf, /*is def=*/true);
DECL_WEAK (decl) = true;