84 lines
1.8 KiB
Rust
84 lines
1.8 KiB
Rust
// ignore-s390x
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// ignore-emscripten
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// ignore-powerpc
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// ignore-powerpc64
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// ignore-powerpc64le
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// ignore-riscv64
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// ignore-sparc
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// ignore-sparc64
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// ignore-e2k64
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#![feature(llvm_asm)]
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#[cfg(any(target_arch = "x86",
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target_arch = "x86_64",
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target_arch = "arm",
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target_arch = "aarch64",
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target_arch = "mips",
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target_arch = "mips64"))]
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mod test_cases {
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fn is_move() {
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let y: &mut isize;
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let x = &mut 0isize;
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unsafe {
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llvm_asm!("nop" : : "r"(x));
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}
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let z = x; //~ ERROR use of moved value: `x`
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}
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fn in_is_read() {
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let mut x = 3;
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let y = &mut x;
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unsafe {
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llvm_asm!("nop" : : "r"(x)); //~ ERROR cannot use
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}
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let z = y;
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}
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fn out_is_assign() {
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let x = 3;
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unsafe {
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llvm_asm!("nop" : "=r"(x)); //~ ERROR cannot assign twice
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}
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let mut a = &mut 3;
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let b = &*a;
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unsafe {
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llvm_asm!("nop" : "=r"(a)); // OK, Shallow write to `a`
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}
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let c = b;
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let d = *a;
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}
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fn rw_is_assign() {
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let x = 3;
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unsafe {
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llvm_asm!("nop" : "+r"(x)); //~ ERROR cannot assign twice
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}
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}
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fn indirect_is_not_init() {
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let x: i32;
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unsafe {
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llvm_asm!("nop" : "=*r"(x)); //~ ERROR use of possibly-uninitialized variable
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}
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}
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fn rw_is_read() {
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let mut x = &mut 3;
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let y = &*x;
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unsafe {
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llvm_asm!("nop" : "+r"(x)); //~ ERROR cannot assign to `x` because it is borrowed
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}
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let z = y;
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}
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fn two_moves() {
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let x = &mut 2;
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unsafe {
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llvm_asm!("nop" : : "r"(x), "r"(x) ); //~ ERROR use of moved value
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}
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}
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}
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fn main() {}
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