[PATCH 16/27] gccrs: intrinsics: Fix invalid error check after improvements to builtin lookup

[Marc Poulhiès]

From: Arthur Cohen <arthur.co...@opensrcsec.com>

Since types are apparently just for fun, don't compare a tl::optional<tree> and 
a tree and
first check if the returned value is a valid option.

gcc/rust/ChangeLog:

        * backend/rust-intrinsic-handlers.cc (ctlz_handler): Fix assertion 
after builtin lookup.

Tested on x86_64-pc-linux-gnu.

---
 gcc/rust/backend/rust-intrinsic-handlers.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/rust/backend/rust-intrinsic-handlers.cc 
b/gcc/rust/backend/rust-intrinsic-handlers.cc
index 3daef61859b..2495de0a5d3 100644
--- a/gcc/rust/backend/rust-intrinsic-handlers.cc
+++ b/gcc/rust/backend/rust-intrinsic-handlers.cc
@@ -700,7 +700,7 @@ ctlz_handler (IntrinsicCtx &ctx, bool nonzero)
 
   auto builtin_decl
     = BuiltinsContext::get ().lookup_simple_builtin (builtin_name);
-  rust_assert (builtin_decl != error_mark_node);
+  rust_assert (builtin_decl);
 
   tree builtin_fn = build_fold_addr_expr_loc (locus, *builtin_decl);
   tree clz_expr
-- 
2.55.0