[gcc r15-9299] gccrs: Adapt testcase to name resolution 2.0

[Arthur Cohen via Gcc-cvs]

https://gcc.gnu.org/g:7ae95869c83ae3ff23c97292a43bedbfe3387364

commit r15-9299-g7ae95869c83ae3ff23c97292a43bedbfe3387364
Author: Pierre-Emmanuel Patry <pierre-emmanuel.pa...@embecosm.com>
Date:   Wed Apr 2 18:20:54 2025 +0200

    gccrs: Adapt testcase to name resolution 2.0
    
    Name resolution 2.0 behavior matches more closely rustc's behavior
    and trying to prevent undeclared label error emission would break some
    other test.
    
    gcc/testsuite/ChangeLog:
    
            * rust/compile/invalid_label_name.rs: Adapt test to nr2.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.pa...@embecosm.com>

Diff:
---
 gcc/testsuite/rust/compile/invalid_label_name.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gcc/testsuite/rust/compile/invalid_label_name.rs 
b/gcc/testsuite/rust/compile/invalid_label_name.rs
index 5c850da636cb..66e40a620e09 100644
--- a/gcc/testsuite/rust/compile/invalid_label_name.rs
+++ b/gcc/testsuite/rust/compile/invalid_label_name.rs
@@ -1,20 +1,24 @@
+// { dg-additional-options "-frust-name-resolution-2.0" }
 pub fn function() {
     'continue: loop {
         // { dg-error "invalid label name .'continue." "" { target *-*-* } .-1 
}
         break 'extern;
         // { dg-error "invalid label name .'extern." "" { target *-*-* } .-1 }
+        // { dg-error "use of undeclared label .'extern." "" { target *-*-* } 
.-2 }
     }
 
     'break: loop {
         // { dg-error "invalid label name .'break." "" { target *-*-* } .-1 }
         break 'for;
         // { dg-error "invalid label name .'for." "" { target *-*-* } .-1 }
+        // { dg-error "use of undeclared label .'for." "" { target *-*-* } .-2 
}
     }
 
     'crate: loop {
         // { dg-error "invalid label name .'crate." "" { target *-*-* } .-1 }
         break 'loop;
         // { dg-error "invalid label name .'loop." "" { target *-*-* } .-1 }
+        // { dg-error "use of undeclared label .'loop." "" { target *-*-* } 
.-2 }
     }
 
     'a: loop {