mirror of
https://github.com/rust-lang/rust.git
synced 2024-10-30 14:01:51 +00:00
36 lines
1.1 KiB
Rust
36 lines
1.1 KiB
Rust
//@ compile-flags: -O
|
|
//@ ignore-debug
|
|
// (with debug assertions turned on, `assert_unchecked` generates a real assertion)
|
|
|
|
#![crate_type = "lib"]
|
|
#![feature(try_with_capacity)]
|
|
|
|
// CHECK-LABEL: @with_capacity_does_not_grow1
|
|
#[no_mangle]
|
|
pub fn with_capacity_does_not_grow1() -> Vec<u32> {
|
|
let v = Vec::with_capacity(1234);
|
|
// CHECK: call {{.*}}__rust_alloc(
|
|
// CHECK-NOT: call {{.*}}__rust_realloc
|
|
// CHECK-NOT: call {{.*}}capacity_overflow
|
|
// CHECK-NOT: call {{.*}}finish_grow
|
|
// CHECK-NOT: call {{.*}}reserve
|
|
// CHECK-NOT: memcpy
|
|
// CHECK-NOT: memset
|
|
v
|
|
}
|
|
|
|
// CHECK-LABEL: @try_with_capacity_does_not_grow2
|
|
#[no_mangle]
|
|
pub fn try_with_capacity_does_not_grow2() -> Option<Vec<Vec<u8>>> {
|
|
let v = Vec::try_with_capacity(1234).ok()?;
|
|
// CHECK: call {{.*}}__rust_alloc(
|
|
// CHECK-NOT: call {{.*}}__rust_realloc
|
|
// CHECK-NOT: call {{.*}}capacity_overflow
|
|
// CHECK-NOT: call {{.*}}finish_grow
|
|
// CHECK-NOT: call {{.*}}handle_alloc_error
|
|
// CHECK-NOT: call {{.*}}reserve
|
|
// CHECK-NOT: memcpy
|
|
// CHECK-NOT: memset
|
|
Some(v)
|
|
}
|