You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
1.2 KiB
63 lines
1.2 KiB
/*
|
|
* Copyright (c) 2018-present, Facebook, Inc.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
import java.util.ArrayList;
|
|
|
|
class HoistGlobal {
|
|
|
|
public static int svar = 0;
|
|
|
|
int read_global() {
|
|
return svar;
|
|
}
|
|
|
|
int return_one() {
|
|
return 1;
|
|
}
|
|
|
|
class Foo {
|
|
void set() {
|
|
svar = 5;
|
|
}
|
|
|
|
int read_global() {
|
|
return svar;
|
|
}
|
|
|
|
int return_zero() {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int global_modification_dont_hoist(int size) {
|
|
Foo f = new Foo();
|
|
int d = 0;
|
|
for (int i = 0; i < size; i++) {
|
|
d += read_global(); // don't hoist since set() changes a global var in the loop
|
|
f.set();
|
|
f.read_global(); // don't hoist
|
|
}
|
|
return d;
|
|
}
|
|
|
|
int global_modification_hoist_FN(ArrayList<?> list) {
|
|
Foo f = new Foo();
|
|
int d = 0;
|
|
for (int i = 0; i < list.size(); i++) {
|
|
d += return_one(); // ok to hoist
|
|
f.set(); // don't invalidate size()
|
|
f.return_zero(); // ok to hoist since doesn't read global
|
|
}
|
|
return d;
|
|
}
|
|
|
|
void call_global_modification_dont_hoist(int size) {
|
|
for (int i = 0; i < size; i++) {
|
|
global_modification_dont_hoist(size);
|
|
}
|
|
}
|
|
}
|