From: Philip Herron <herron.philip@googlemail.com>
Date: Fri, 5 May 2023 16:16:08 +0000 (+0100)
Subject: gccrs: Fix ICE in check for unused global variables
X-Git-Tag: basepoints/gcc-15~2579
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c6f1b887e8f52ba6252ad83e03cbea41af326f6e;p=thirdparty%2Fgcc.git

gccrs: Fix ICE in check for unused global variables

Calling get variable expression will return an expression but we are
checking for unused decls so lets actually pass the decl.

Addresses #2188

gcc/rust/ChangeLog:

	* checks/lints/rust-lint-unused-var.cc (UnusedVariables::Lint): use the decl not the expr

Signed-off-by: Philip Herron <herron.philip@googlemail.com>
---

diff --git a/gcc/rust/checks/lints/rust-lint-unused-var.cc b/gcc/rust/checks/lints/rust-lint-unused-var.cc
index f60cfacd1f0b..4928fb27aa8c 100644
--- a/gcc/rust/checks/lints/rust-lint-unused-var.cc
+++ b/gcc/rust/checks/lints/rust-lint-unused-var.cc
@@ -17,7 +17,7 @@
 // <http://www.gnu.org/licenses/>.
 
 #include "rust-lint-unused-var.h"
-#include "print-tree.h"
+#include "rust-gcc.h"
 
 namespace Rust {
 namespace Analysis {
@@ -84,8 +84,8 @@ UnusedVariables::Lint (Compile::Context &ctx)
 
   for (auto &var : ctx.get_var_decls ())
     {
-      tree t = ctx.get_backend ()->var_expression (var, Location ());
-      check_decl (&t);
+      tree decl = var->get_decl ();
+      check_decl (&decl);
     }
 
   for (auto &const_decl : ctx.get_const_decls ())