Add global_asm tests

src/doc/unstable-book/src/global_asm.md

@@ -27,7 +27,7 @@ A simple usage looks like this:
 ```rust,ignore
 # #![feature(global_asm)]
 # you also need relevant target_arch cfgs
-global_asm!(include_str("something_neato.s"));
+global_asm!(include_str!("something_neato.s"));
 ```
 
 And a more complicated usage looks like this:

src/librustc_driver/test.rs

@@ -233,6 +233,7 @@ fn search(this: &Env, it: &hir::Item, idx: usize, names: &[String]) -> Option<as
                 hir::ItemStatic(..) |
                 hir::ItemFn(..) |
                 hir::ItemForeignMod(..) |
+                hir::ItemGlobalAsm(..) |
                 hir::ItemTy(..) => None,
 
                 hir::ItemEnum(..) |

src/libsyntax/feature_gate.rs

@@ -986,7 +986,7 @@ pub fn feature_err<'a>(sess: &'a ParseSess, feature: &str, span: Span, issue: Ga
     "inline assembly is not stable enough for use and is subject to change";
 
 pub const EXPLAIN_GLOBAL_ASM: &'static str =
-    "module-level inline assembly is experimental and subject to change";
+    "`global_asm!` is not stable enough for use and is subject to change";
 
 pub const EXPLAIN_LOG_SYNTAX: &'static str =
     "`log_syntax!` is not stable enough for use and is subject to change";

src/test/codegen/foo.s

+.global foo
+foo:
+    jmp baz

src/test/codegen/global_asm.rs

+// Copyright 2017 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.
+
+// ignore-aarch64
+// ignore-aarch64_be
+// ignore-arm
+// ignore-armeb
+// ignore-avr
+// ignore-bpfel
+// ignore-bpfeb
+// ignore-hexagon
+// ignore-mips
+// ignore-mipsel
+// ignore-mips64
+// ignore-mips64el
+// ignore-msp430
+// ignore-powerpc64
+// ignore-powerpc64le
+// ignore-powerpc
+// ignore-r600
+// ignore-amdgcn
+// ignore-sparc
+// ignore-sparcv9
+// ignore-sparcel
+// ignore-s390x
+// ignore-tce
+// ignore-thumb
+// ignore-thumbeb
+// ignore-xcore
+// ignore-nvptx
+// ignore-nvptx64
+// ignore-le32
+// ignore-le64
+// ignore-amdil
+// ignore-amdil64
+// ignore-hsail
+// ignore-hsail64
+// ignore-spir
+// ignore-spir64
+// ignore-kalimba
+// ignore-shave
+// ignore-wasm32
+// ignore-wasm64
+// ignore-emscripten
+// compile-flags: -C no-prepopulate-passes
+
+#![feature(global_asm)]
+#![crate_type = "lib"]
+
+// CHECK-LABEL: foo
+// CHECK: module asm
+// this regex will capture the correct unconditional branch inst.
+// CHECK: module asm "{{[[:space:]]+}}jmp baz"
+global_asm!(r#"
+    .global foo
+foo:
+    jmp baz
+"#);
+
+extern "C" {
+    fn foo();
+}
+
+// CHECK-LABEL: @baz
+#[no_mangle]
+pub unsafe extern "C" fn baz() {}

src/test/codegen/global_asm_include.rs

+// Copyright 2017 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.
+
+// ignore-aarch64
+// ignore-aarch64_be
+// ignore-arm
+// ignore-armeb
+// ignore-avr
+// ignore-bpfel
+// ignore-bpfeb
+// ignore-hexagon
+// ignore-mips
+// ignore-mipsel
+// ignore-mips64
+// ignore-mips64el
+// ignore-msp430
+// ignore-powerpc64
+// ignore-powerpc64le
+// ignore-powerpc
+// ignore-r600
+// ignore-amdgcn
+// ignore-sparc
+// ignore-sparcv9
+// ignore-sparcel
+// ignore-s390x
+// ignore-tce
+// ignore-thumb
+// ignore-thumbeb
+// ignore-xcore
+// ignore-nvptx
+// ignore-nvptx64
+// ignore-le32
+// ignore-le64
+// ignore-amdil
+// ignore-amdil64
+// ignore-hsail
+// ignore-hsail64
+// ignore-spir
+// ignore-spir64
+// ignore-kalimba
+// ignore-shave
+// ignore-wasm32
+// ignore-wasm64
+// ignore-emscripten
+// compile-flags: -C no-prepopulate-passes
+
+#![feature(global_asm)]
+#![crate_type = "lib"]
+
+// CHECK-LABEL: foo
+// CHECK: module asm
+// CHECK: module asm "{{[[:space:]]+}}jmp baz"
+global_asm!(include_str!("foo.s"));
+
+extern "C" {
+    fn foo();
+}
+
+// CHECK-LABEL: @baz
+#[no_mangle]
+pub unsafe extern "C" fn baz() {}

src/test/codegen/global_asm_x2.rs

+// Copyright 2017 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.
+
+// ignore-aarch64
+// ignore-aarch64_be
+// ignore-arm
+// ignore-armeb
+// ignore-avr
+// ignore-bpfel
+// ignore-bpfeb
+// ignore-hexagon
+// ignore-mips
+// ignore-mipsel
+// ignore-mips64
+// ignore-mips64el
+// ignore-msp430
+// ignore-powerpc64
+// ignore-powerpc64le
+// ignore-powerpc
+// ignore-r600
+// ignore-amdgcn
+// ignore-sparc
+// ignore-sparcv9
+// ignore-sparcel
+// ignore-s390x
+// ignore-tce
+// ignore-thumb
+// ignore-thumbeb
+// ignore-xcore
+// ignore-nvptx
+// ignore-nvptx64
+// ignore-le32
+// ignore-le64
+// ignore-amdil
+// ignore-amdil64
+// ignore-hsail
+// ignore-hsail64
+// ignore-spir
+// ignore-spir64
+// ignore-kalimba
+// ignore-shave
+// ignore-wasm32
+// ignore-wasm64
+// ignore-emscripten
+// compile-flags: -C no-prepopulate-passes
+
+#![feature(global_asm)]
+#![crate_type = "lib"]
+#[no_std]
+
+// CHECK-LABEL: foo
+// CHECK: module asm
+// CHECK: module asm "{{[[:space:]]+}}jmp baz"
+// any other global_asm will be appended to this first block, so:
+// CHECK-LABEL: bar
+// CHECK: module asm "{{[[:space:]]+}}jmp quux"
+global_asm!(r#"
+    .global foo
+foo:
+    jmp baz
+"#);
+
+extern "C" {
+    fn foo();
+}
+
+// CHECK-LABEL: @baz
+#[no_mangle]
+pub unsafe extern "C" fn baz() {}
+
+// no checks here; this has been appended to the first occurrence
+global_asm!(r#"
+    .global bar
+bar:
+    jmp quux
+"#);
+
+extern "C" {
+    fn bar();
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn quux() {}

src/test/compile-fail/feature-gate-global_asm.rs

+// 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.
+
+// gate-test-global_asm
+
+global_asm!(""); //~ ERROR `global_asm!` is not stable
+
+fn main() {}

src/test/run-pass/empty_global_asm.rs

+// Copyright 2017 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(global_asm)]
+
+#[cfg(target_arch = "x86")]
+global_asm!("");
+
+#[cfg(target_arch = "x86_64")]
+global_asm!("");
+
+#[cfg(target_arch = "arm")]
+global_asm!("");
+
+#[cfg(target_arch = "aarch64")]
+global_asm!("");
+
+#[cfg(target_arch = "mips")]
+global_asm!("");
+
+fn main() {}

src/test/run-pass/simple_global_asm.rs

+// Copyright 2017 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(global_asm)]
+
+#[cfg(any(target_arch = "x86_64", target_arch = "x86"))]
+global_asm!(r#"
+    .global foo
+foo:
+    jmp baz
+"#);
+
+extern {
+    fn foo();
+}
+
+#[no_mangle]
+pub extern fn baz() {}
+
+fn main() {}