[gcc r16-2861] gccrs: derive(Hash): Use new Builder API

[Arthur Cohen via Gcc-cvs]

https://gcc.gnu.org/g:54b7f68b45bf1945571dd1305c92167634783054

commit r16-2861-g54b7f68b45bf1945571dd1305c92167634783054
Author: Arthur Cohen <arthur.co...@embecosm.com>
Date:   Tue Apr 22 20:02:56 2025 +0200

    gccrs: derive(Hash): Use new Builder API
    
    gcc/rust/ChangeLog:
    
            * expand/rust-derive-hash.cc (DeriveHash::visit_enum): Use new APIs.

Diff:
---
 gcc/rust/expand/rust-derive-hash.cc | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/gcc/rust/expand/rust-derive-hash.cc 
b/gcc/rust/expand/rust-derive-hash.cc
index 0c9b0f7b1057..94aede2fe030 100644
--- a/gcc/rust/expand/rust-derive-hash.cc
+++ b/gcc/rust/expand/rust-derive-hash.cc
@@ -231,14 +231,7 @@ DeriveHash::visit_enum (Enum &item)
   auto cases = std::vector<MatchCase> ();
   auto type_name = item.get_identifier ().as_string ();
 
-  auto intrinsic = ptrify (
-    builder.path_in_expression ({"core", "intrinsics", "discriminant_value"},
-                               true));
-
-  auto let_discr
-    = builder.let (builder.identifier_pattern (DeriveHash::discr), nullptr,
-                  builder.call (std::move (intrinsic),
-                                builder.identifier ("self")));
+  auto let_discr = builder.discriminant_value (DeriveHash::discr);
 
   auto discr_hash = builder.statementify (
     hash_call (builder.ref (builder.identifier (DeriveHash::discr))));