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Rollup merge of #40702 - mrhota:global_asm, r=nagisa

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Implement global_asm!() (RFC 1548)

This is a first attempt. ~~One (potential) problem I haven't solved is how to handle multiple usages of `global_asm!` in a module/crate. It looks like `LLVMSetModuleInlineAsm` overwrites module asm, and `LLVMAppendModuleInlineAsm` is not provided in LLVM C headers 😦~~

I can provide more detail as needed, but honestly, there's not a lot going on here.

r? @eddyb

CC @Amanieu @jackpot51

Tracking issue: #35119
This commit is contained in:
Corey Farwell 2017-04-14 17:41:03 -04:00 • committed by GitHub
commit e6f6b445aa
48 changed files with 648 additions and 24 deletions
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3
src/test/codegen/foo.s Normal file
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.global foo
foo:
jmp baz

73
src/test/codegen/global_asm.rs Normal file
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// 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() {}

68
src/test/codegen/global_asm_include.rs Normal file
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// 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() {}

90
src/test/codegen/global_asm_x2.rs Normal file
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@ -0,0 +1,90 @@
// 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() {}