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Auto merge of #78684 - devsnek:inline-asm-wasm, r=Amanieu

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Add wasm32 support to inline asm

There is some contention around inline asm and wasm, and I really only made this to figure out the process of hacking on rustc, but I figured as long as the code existed, it was worth uploading.

cc `@Amanieu`
This commit is contained in:
bors 2020-12-01 20:23:06 +00:00
commit 6645da366e
8 changed files with 231 additions and 4 deletions
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150
src/test/assembly/asm/wasm-types.rs Normal file
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@ -0,0 +1,150 @@
// no-system-llvm
// assembly-output: emit-asm
// compile-flags: --target wasm32-unknown-unknown
// compile-flags: --crate-type cdylib
// needs-llvm-components: webassembly
#![feature(no_core, lang_items, rustc_attrs)]
#![no_core]
#[rustc_builtin_macro]
macro_rules! asm {
() => {};
}
#[rustc_builtin_macro]
macro_rules! concat {
() => {};
}
#[lang = "sized"]
trait Sized {}
#[lang = "copy"]
trait Copy {}
type ptr = *mut u8;
impl Copy for i8 {}
impl Copy for i16 {}
impl Copy for i32 {}
impl Copy for f32 {}
impl Copy for i64 {}
impl Copy for f64 {}
impl Copy for ptr {}
extern "C" {
fn extern_func();
static extern_static: u8;
}
// CHECK-LABEL: sym_fn:
// CHECK: #APP
// CHECK: call extern_func
// CHECK: #NO_APP
#[no_mangle]
pub unsafe fn sym_fn() {
asm!("call {}", sym extern_func);
}
// CHECK-LABEL: sym_static
// CHECK: #APP
// CHECK: i32.const 42
// CHECK: i32.store extern_static
// CHECK: #NO_APP
#[no_mangle]
pub unsafe fn sym_static() {
asm!("
i32.const 42
i32.store {}
", sym extern_static);
}
macro_rules! check {
($func:ident $ty:ident $instr:literal) => {
#[no_mangle]
pub unsafe fn $func(x: $ty) -> $ty {
let y;
asm!(concat!("local.get {}\n", $instr, "\nlocal.set {}"), in(local) x, out(local) y);
y
}
};
}
// CHECK-LABEL: i8_i32:
// CHECK: #APP
// CHECK: local.get {{[0-9]}}
// CHECK: i32.clz
// CHECK: local.set {{[0-9]}}
// CHECK: #NO_APP
check!(i8_i32 i8 "i32.clz");
// CHECK-LABEL: i16_i32:
// CHECK: #APP
// CHECK: local.get {{[0-9]}}
// CHECK: i32.clz
// CHECK: local.set {{[0-9]}}
// CHECK: #NO_APP
check!(i16_i32 i16 "i32.clz");
// CHECK-LABEL: i32_i32:
// CHECK: #APP
// CHECK: local.get {{[0-9]}}
// CHECK: i32.clz
// CHECK: local.set {{[0-9]}}
// CHECK: #NO_APP
check!(i32_i32 i32 "i32.clz");
// CHECK-LABEL: i8_i64
// CHECK: #APP
// CHECK: local.get {{[0-9]}}
// CHECK: i64.clz
// CHECK: local.set {{[0-9]}}
// CHECK: #NO_APP
check!(i8_i64 i8 "i64.clz");
// CHECK-LABEL: i16_i64
// CHECK: #APP
// CHECK: local.get {{[0-9]}}
// CHECK: i64.clz
// CHECK: local.set {{[0-9]}}
// CHECK: #NO_APP
check!(i16_i64 i16 "i64.clz");
// CHECK-LABEL: i32_i64
// CHECK: #APP
// CHECK: local.get {{[0-9]}}
// CHECK: i64.clz
// CHECK: local.set {{[0-9]}}
// CHECK: #NO_APP
check!(i32_i64 i32 "i64.clz");
// CHECK-LABEL: i64_i64
// CHECK: #APP
// CHECK: local.get {{[0-9]}}
// CHECK: i64.clz
// CHECK: local.set {{[0-9]}}
// CHECK: #NO_APP
check!(i64_i64 i64 "i64.clz");
// CHECK-LABEL: f32_f32
// CHECK: #APP
// CHECK: local.get {{[0-9]}}
// CHECK: f32.abs
// CHECK: local.set {{[0-9]}}
// CHECK: #NO_APP
check!(f32_f32 f32 "f32.abs");
// CHECK-LABEL: f64_f64
// CHECK: #APP
// CHECK: local.get {{[0-9]}}
// CHECK: f64.abs
// CHECK: local.set {{[0-9]}}
// CHECK: #NO_APP
check!(f64_f64 f64 "f64.abs");
// CHECK-LABEL: i32_ptr
// CHECK: #APP
// CHECK: local.get {{[0-9]}}
// CHECK: i32.eqz
// CHECK: local.set {{[0-9]}}
// CHECK: #NO_APP
check!(i32_ptr ptr "i32.eqz");

4
src/test/ui/asm/bad-arch.rs
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@ -1,5 +1,5 @@
// compile-flags: --target wasm32-unknown-unknown
// needs-llvm-components: webassembly
// compile-flags: --target sparc-unknown-linux-gnu
// needs-llvm-components: sparc
#![feature(no_core, lang_items, rustc_attrs)]
#![no_core]