Auto merge of #47147 - projektir:to_ptr_cast, r=eddyb

Force appropriate extension when converting from int to ptr #43291

Fixes #43291.

Looking for feedback if I've missed something and/or need to add more tests.

@eddyb @retep998 @nagisa @oli-obk

1 files changed, 18 insertions, 0 deletions

diff --git a/src/test/run-pass/issue-43291.rs b/src/test/run-pass/issue-43291.rs
new file mode 100644
index 00000000000..98de8f78859
--- /dev/null
+++ b/src/test/run-pass/issue-43291.rs
@@ -0,0 +1,18 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+pub fn main() {
+    assert_eq!(!0usize as *const (), foo(0, 1));
+    assert_eq!(!0usize as *const (), (0i8 - 1) as *const ());
+}
+
+pub fn foo(a: i8, b: i8) -> *const () {
+    (a - b) as *const ()
+}