[gcc r11-11383] Objective-C, Darwin: Fix a regression in handling bad receivers.

[gcc r11-11383] Objective-C, Darwin: Fix a regression in handling bad receivers.

[Iain D Sandoe]

https://gcc.gnu.org/g:c01efafd7fc6d3ff58db930fd785a8bcd991ac54

commit r11-11383-gc01efafd7fc6d3ff58db930fd785a8bcd991ac54
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Sat Jan 6 19:21:40 2024 +0000

    Objective-C, Darwin: Fix a regression in handling bad receivers.
    
    This is seen on 32b hosts with a 64b multilib, and is an ICE when
    the build has checking enabled.  The fix is to exit the routine
    early if the sender or receiver are already error_mark_node.
    
    gcc/objc/ChangeLog:
    
            * objc-next-runtime-abi-02.c
            (build_v2_objc_method_fixup_call): Early exit for cases
            where the sender or receiver are known to be in error.
    
    Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
    (cherry picked from commit 846794ead2982fc85a3b1a83bbb831fa096b2b7c)

Diff:
---
 gcc/objc/objc-next-runtime-abi-02.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gcc/objc/objc-next-runtime-abi-02.c b/gcc/objc/objc-next-runtime-abi-02.c
index 2a4f87cc726..0c59299db05 100644
--- a/gcc/objc/objc-next-runtime-abi-02.c
+++ b/gcc/objc/objc-next-runtime-abi-02.c
@@ -1663,6 +1663,8 @@ build_v2_objc_method_fixup_call (int super_flag, tree method_prototype,
   rcv_p = (super_flag ? objc_super_type : objc_object_type);
 
   lookup_object = build_c_cast (input_location, rcv_p, lookup_object);
+  if (sender == error_mark_node || lookup_object == error_mark_node)
+    return error_mark_node;
 
   /* Use SAVE_EXPR to avoid evaluating the receiver twice.  */
   lookup_object = save_expr (lookup_object);