rollup merge of #20124: klutzy/pprust-asm

Author: alexcrichton

src/libsyntax/print/pprust.rs

@@ -1787,11 +1787,7 @@ impl<'a> State<'a> {
                 }
             }
             ast::ExprInlineAsm(ref a) => {
-                if a.volatile {
-                    try!(word(&mut self.s, "__volatile__ asm!"));
-                } else {
-                    try!(word(&mut self.s, "asm!"));
-                }
+                try!(word(&mut self.s, "asm!"));
                 try!(self.popen());
                 try!(self.print_string(a.asm.get(), a.asm_str_style));
                 try!(self.word_space(":"));
@@ -1829,6 +1825,28 @@ impl<'a> State<'a> {
                     try!(s.print_string(co.get(), ast::CookedStr));
                     Ok(())
                 }));
+
+                let mut options = vec!();
+                if a.volatile {
+                    options.push("volatile");
+                }
+                if a.alignstack {
+                    options.push("alignstack");
+                }
+                if a.dialect == ast::AsmDialect::AsmIntel {
+                    options.push("intel");
+                }
+
+                if options.len() > 0 {
+                    try!(space(&mut self.s));
+                    try!(self.word_space(":"));
+                    try!(self.commasep(Inconsistent, &*options,
+                                       |s, &co| {
+                        try!(s.print_string(co, ast::CookedStr));
+                        Ok(())
+                    }));
+                }
+
                 try!(self.pclose());
             }
             ast::ExprMac(ref m) => try!(self.print_mac(m, token::Paren)),

src/test/pretty/asm-options.rs

@@ -0,0 +1,21 @@
+// Copyright 2014 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.
+
+#![feature(asm)]
+
+// pp-exact
+
+pub fn main() {
+    unsafe {
+        asm!("" : : : : "volatile");
+        asm!("" : : : : "alignstack");
+        asm!("" : : : : "intel");
+    }
+}