[gcc r15-8155] gccrs: Add a new regression test over struct expr field

[Arthur Cohen via Gcc-cvs]

https://gcc.gnu.org/g:949892cb959fa9c9d7f148aae746181cefd8b956

commit r15-8155-g949892cb959fa9c9d7f148aae746181cefd8b956
Author: Pierre-Emmanuel Patry <pierre-emmanuel.pa...@embecosm.com>
Date:   Mon May 20 17:57:52 2024 +0200

    gccrs: Add a new regression test over struct expr field
    
    We want to prevent regressions on struct expr field attribute parsing.
    
    gcc/testsuite/ChangeLog:
    
            * rust/compile/struct_expr_field_attributes.rs: New test.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.pa...@embecosm.com>

Diff:
---
 .../rust/compile/struct_expr_field_attributes.rs   | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/gcc/testsuite/rust/compile/struct_expr_field_attributes.rs 
b/gcc/testsuite/rust/compile/struct_expr_field_attributes.rs
new file mode 100644
index 000000000000..b5d65dc4bb65
--- /dev/null
+++ b/gcc/testsuite/rust/compile/struct_expr_field_attributes.rs
@@ -0,0 +1,22 @@
+pub struct Test {
+    #[cfg(not(any(
+        target_os = "solaris",
+        target_os = "illumos",
+        target_os = "fuchsia",
+        target_os = "redox",
+    )))]
+    value: bool,
+    // { dg-warning "field is never read" "" { target *-*-* } .-1 }
+}
+
+pub fn test() -> Test {
+    Test {
+        #[cfg(not(any(
+            target_os = "solaris",
+            target_os = "illumos",
+            target_os = "fuchsia",
+            target_os = "redox",
+        )))]
+        value: false,
+    }
+}