2 files changed, 13 insertions, 6 deletions
diff --git a/gcc/rust/parse/rust-parse-impl.h b/gcc/rust/parse/rust-parse-impl.h
index 227564c..d925aca 100644
--- a/gcc/rust/parse/rust-parse-impl.h
+++ b/gcc/rust/parse/rust-parse-impl.h
@@ -7276,12 +7276,6 @@ Parser<ManagedTokenSource>::parse_expr_without_block (
     case LEFT_SQUARE:
       // array expr (creation, not index)
       return parse_array_expr (std::move (outer_attrs));
-    case LEFT_PAREN:
-      /* either grouped expr or tuple expr - depends on whether there is a
-       * comma
-       * inside the parentheses - if so, tuple expr, otherwise, grouped expr.
-       */
-      return parse_grouped_or_tuple_expr (std::move (outer_attrs));
       default: {
 	/* HACK: piggyback on pratt parsed expr and abuse polymorphism to
 	 * essentially downcast */
diff --git a/gcc/testsuite/rust/compile/issue-1393.rs b/gcc/testsuite/rust/compile/issue-1393.rs
new file mode 100644
index 0000000..e09f01b
--- /dev/null
+++ b/gcc/testsuite/rust/compile/issue-1393.rs
@@ -0,0 +1,13 @@
+fn tst() {
+    let a = 123;
+    let b = 0;
+    let _c = if b == 0 {
+        (a & 0x7fffff) << 1
+    } else {
+        (a & 0x7fffff) | 0x800000
+    };
+}
+
+fn main() {
+    tst()
+}