| //@ 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) |
| } |
