gccrs: Fix ICE on raw reference

This patch adds support for raw references which enforce the pointer
type away from a reference type.

Fixes Rust-GCC#3667

gcc/rust/ChangeLog:

	* backend/rust-compile-base.cc (HIRCompileBase::address_expression): allow optional type
	* backend/rust-compile-base.h: update prototype
	* backend/rust-compile-expr.cc (CompileExpr::visit): update borrow expr
	* backend/rust-compile-extern.h: remove unused debug
	* backend/rust-compile-resolve-path.cc (HIRCompileBase::query_compile): update usage
	* hir/rust-ast-lower-expr.cc (ASTLoweringExpr::visit): lower raw ref
	* hir/tree/rust-hir-expr.cc (BorrowExpr::BorrowExpr): add flag for raw ref
	* hir/tree/rust-hir-expr.h (class BorrowExpr): add new raw ref field
	* typecheck/rust-hir-type-check-expr.cc (TypeCheckExpr::visit): add handle for raw ref

gcc/testsuite/ChangeLog:

	* rust/compile/issue-3667.rs: New test.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/gcc/rust/backend/rust-compile-resolve-path.cc b/gcc/rust/backend/rust-compile-resolve-path.cc
index bba0498..81d2dbb 100644
--- a/gcc/rust/backend/rust-compile-resolve-path.cc
+++ b/gcc/rust/backend/rust-compile-resolve-path.cc
@@ -261,10 +261,10 @@ HIRCompileBase::query_compile (HirId ref, TyTy::BaseType *lookup,
       HIR::ExternalItem *resolved_extern_item = hir_extern_item->first;
       if (!lookup->has_substitutions_defined ())
 	return CompileExternItem::compile (resolved_extern_item, ctx, nullptr,
-					   true, expr_locus);
+					   expr_locus);
       else
 	return CompileExternItem::compile (resolved_extern_item, ctx, lookup,
-					   true, expr_locus);
+					   expr_locus);
     }
   else
     {