42 lines
927 B
Rust
42 lines
927 B
Rust
//@ unit-test: GVN
|
|
// Check that we do not propagate past an indirect mutation.
|
|
#![feature(raw_ref_op)]
|
|
|
|
// EMIT_MIR indirect_mutation.foo.GVN.diff
|
|
fn foo() {
|
|
// CHECK-LABEL: fn foo(
|
|
// CHECK: debug u => _1;
|
|
// CHECK: debug y => _3;
|
|
// CHECK: _1 = const (1_i32,);
|
|
// CHECK: _2 = &mut (_1.0: i32);
|
|
// CHECK: (*_2) = const 5_i32;
|
|
// CHECK: _4 = (_1.0: i32);
|
|
// CHECK: _3 = Eq(move _4, const 5_i32);
|
|
|
|
let mut u = (1,);
|
|
*&mut u.0 = 5;
|
|
let y = { u.0 } == 5;
|
|
}
|
|
|
|
// EMIT_MIR indirect_mutation.bar.GVN.diff
|
|
fn bar() {
|
|
// CHECK-LABEL: fn bar(
|
|
// CHECK: debug v => _1;
|
|
// CHECK: debug y => _4;
|
|
// CHECK: _3 = &raw mut (_1.0: i32);
|
|
// CHECK: (*_3) = const 5_i32;
|
|
// CHECK: _5 = (_1.0: i32);
|
|
// CHECK: _4 = Eq(move _5, const 5_i32);
|
|
|
|
let mut v = (1,);
|
|
unsafe {
|
|
*&raw mut v.0 = 5;
|
|
}
|
|
let y = { v.0 } == 5;
|
|
}
|
|
|
|
fn main() {
|
|
foo();
|
|
bar();
|
|
}
|