[gcc r15-9295] gccrs: Update ast visitor with proper check for looplabel

[Arthur Cohen via Gcc-cvs]

https://gcc.gnu.org/g:3cf4d5cb996a062a22fe6fb496a622ec7519bd65

commit r15-9295-g3cf4d5cb996a062a22fe6fb496a622ec7519bd65
Author: Pierre-Emmanuel Patry <pierre-emmanuel.pa...@embecosm.com>
Date:   Tue Apr 1 16:10:38 2025 +0200

    gccrs: Update ast visitor with proper check for looplabel
    
    The visitor was visiting loop label even when they did not exist.
    
    gcc/rust/ChangeLog:
    
            * ast/rust-ast-visitor.cc (DefaultASTVisitor::visit): Add
            check for loop label before visiting it.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.pa...@embecosm.com>

Diff:
---
 gcc/rust/ast/rust-ast-visitor.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/rust/ast/rust-ast-visitor.cc b/gcc/rust/ast/rust-ast-visitor.cc
index 73c6b1ee31e1..38617bf4a99b 100644
--- a/gcc/rust/ast/rust-ast-visitor.cc
+++ b/gcc/rust/ast/rust-ast-visitor.cc
@@ -559,7 +559,8 @@ void
 DefaultASTVisitor::visit (AST::LoopExpr &expr)
 {
   visit_outer_attrs (expr);
-  visit (expr.get_loop_label ());
+  if (expr.has_loop_label ())
+    visit (expr.get_loop_label ());
   visit (expr.get_loop_block ());
 }