Removed incorrect special case for Rust bitwise operators (rust-lang#403)

Author: zhassan-aws

compiler/rustc_codegen_llvm/src/gotoc/rvalue.rs

@@ -48,30 +48,12 @@ impl<'tcx> GotocCtx<'tcx> {
         let ce1 = self.codegen_operand(e1);
         let ce2 = self.codegen_operand(e2);
         match op {
+            BinOp::BitAnd => ce1.bitand(ce2),
+            BinOp::BitOr => ce1.bitor(ce2),
+            BinOp::BitXor => ce1.bitxor(ce2),
             BinOp::Div => ce1.div(ce2),
             BinOp::Rem => ce1.rem(ce2),
-            BinOp::BitXor => {
-                if self.operand_ty(e1).is_bool() {
-                    ce1.xor(ce2)
-                } else {
-                    ce1.bitxor(ce2)
-                }
-            }
-            BinOp::BitAnd => {
-                if self.operand_ty(e1).is_bool() {
-                    ce1.and(ce2)
-                } else {
-                    ce1.bitand(ce2)
-                }
-            }
-            BinOp::BitOr => {
-                if self.operand_ty(e1).is_bool() {
-                    ce1.or(ce2)
-                } else {
-                    ce1.bitor(ce2)
-                }
-            }
-            _ => unreachable!(),
+            _ => unreachable!("Unexpected {:?}", op),
         }
     }
 

src/test/cbmc/BitwiseArithOperators/bool.rs

@@ -0,0 +1,10 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+include!("../../rmc-prelude.rs");
+
+fn main() {
+    let a: bool = __nondet();
+    let b: bool = __nondet();
+    let c = a ^ b;
+    assert!((a == b && !c) || (a != b && c));
+}