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fix corner cases in assignments, reduce_vars & unused (#3950)

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fixes #3949
fixes #3951
This commit is contained in:
Alex Lam S.L
2020-06-04 21:06:43 +01:00
committed by GitHub
parent a489f8cb5e
commit 04fd3d90f8
9 changed files with 317 additions and 75 deletions
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463
test/compress/assignments.js Normal file
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@@ -0,0 +1,463 @@
op_equals_left_local_var: {
options = {
assignments: true,
evaluate: true,
}
input: {
var x;
x = x + 3;
x = x - 3;
x = x / 3;
x = x * 3;
x = x >> 3;
x = x << 3;
x = x >>> 3;
x = x | 3;
x = x ^ 3;
x = x % 3;
x = x & 3;
x = x + g();
x = x - g();
x = x / g();
x = x * g();
x = x >> g();
x = x << g();
x = x >>> g();
x = x | g();
x = x ^ g();
x = x % g();
x = x & g();
}
expect: {
var x;
x += 3;
x -= 3;
x /= 3;
x *= 3;
x >>= 3;
x <<= 3;
x >>>= 3;
x |= 3;
x ^= 3;
x %= 3;
x &= 3;
x += g();
x -= g();
x /= g();
x *= g();
x >>= g();
x <<= g();
x >>>= g();
x |= g();
x ^= g();
x %= g();
x &= g();
}
}
op_equals_right_local_var: {
options = {
assignments: true,
evaluate: true,
}
input: {
var x;
x = (x -= 2) ^ x;
x = 3 + x;
x = 3 - x;
x = 3 / x;
x = 3 * x;
x = 3 >> x;
x = 3 << x;
x = 3 >>> x;
x = 3 | x;
x = 3 ^ x;
x = 3 % x;
x = 3 & x;
x = g() + x;
x = g() - x;
x = g() / x;
x = g() * x;
x = g() >> x;
x = g() << x;
x = g() >>> x;
x = g() | x;
x = g() ^ x;
x = g() % x;
x = g() & x;
}
expect: {
var x;
x = (x -= 2) ^ x;
x = 3 + x;
x = 3 - x;
x = 3 / x;
x *= 3;
x = 3 >> x;
x = 3 << x;
x = 3 >>> x;
x |= 3;
x ^= 3;
x = 3 % x;
x &= 3;
x = g() + x;
x = g() - x;
x = g() / x;
x = g() * x;
x = g() >> x;
x = g() << x;
x = g() >>> x;
x = g() | x;
x = g() ^ x;
x = g() % x;
x = g() & x;
}
}
op_equals_left_global_var: {
options = {
assignments: true,
evaluate: true,
}
input: {
x = x + 3;
x = x - 3;
x = x / 3;
x = x * 3;
x = x >> 3;
x = x << 3;
x = x >>> 3;
x = x | 3;
x = x ^ 3;
x = x % 3;
x = x & 3;
x = x + g();
x = x - g();
x = x / g();
x = x * g();
x = x >> g();
x = x << g();
x = x >>> g();
x = x | g();
x = x ^ g();
x = x % g();
x = x & g();
}
expect: {
x += 3;
x -= 3;
x /= 3;
x *= 3;
x >>= 3;
x <<= 3;
x >>>= 3;
x |= 3;
x ^= 3;
x %= 3;
x &= 3;
x += g();
x -= g();
x /= g();
x *= g();
x >>= g();
x <<= g();
x >>>= g();
x |= g();
x ^= g();
x %= g();
x &= g();
}
}
op_equals_right_global_var: {
options = {
assignments: true,
evaluate: true,
}
input: {
x = (x -= 2) ^ x;
x = 3 + x;
x = 3 - x;
x = 3 / x;
x = 3 * x;
x = 3 >> x;
x = 3 << x;
x = 3 >>> x;
x = 3 | x;
x = 3 ^ x;
x = 3 % x;
x = 3 & x;
x = g() + x;
x = g() - x;
x = g() / x;
x = g() * x;
x = g() >> x;
x = g() << x;
x = g() >>> x;
x = g() | x;
x = g() ^ x;
x = g() % x;
x = g() & x;
}
expect: {
x = (x -= 2) ^ x;
x = 3 + x;
x = 3 - x;
x = 3 / x;
x *= 3;
x = 3 >> x;
x = 3 << x;
x = 3 >>> x;
x |= 3;
x ^= 3;
x = 3 % x;
x &= 3;
x = g() + x;
x = g() - x;
x = g() / x;
x = g() * x;
x = g() >> x;
x = g() << x;
x = g() >>> x;
x = g() | x;
x = g() ^ x;
x = g() % x;
x = g() & x;
}
}
increment_decrement_1: {
options = {
assignments: true,
reduce_vars: true,
}
input: {
console.log(function(a) {
a += 1;
a -= 1;
return a;
}(42));
}
expect: {
console.log(function(a){
++a;
--a;
return a;
}(42));
}
expect_stdout: "42"
}
increment_decrement_2: {
options = {
assignments: true,
passes: 2,
reduce_vars: true,
}
input: {
console.log(function(a) {
a = a + 1;
a = a - 1;
a += 1;
a -= 1;
return a;
}(42));
}
expect: {
console.log(function(a){
++a;
--a;
++a;
--a;
return a;
}(42));
}
expect_stdout: "42"
}
issue_3375_1: {
options = {
assignments: true,
reduce_vars: true,
}
input: {
function p(o) {
console.log(typeof o, o);
}
p(function(b) {
var a = b += 1;
--b;
return a;
}("object"));
}
expect: {
function p(o) {
console.log(typeof o, o);
}
p(function(b) {
var a = b += 1;
--b;
return a;
}("object"));
}
expect_stdout: "string object1"
}
issue_3375_2: {
options = {
assignments: true,
reduce_vars: true,
}
input: {
function p(o) {
console.log(typeof o, o);
}
p(function(b) {
var a = b -= 1;
--b;
return a;
}("object"));
}
expect: {
function p(o) {
console.log(typeof o, o);
}
p(function(b) {
var a = --b;
--b;
return a;
}("object"));
}
expect_stdout: "number NaN"
}
issue_3427: {
options = {
assignments: true,
sequences: true,
side_effects: true,
unused: true,
}
input: {
(function() {
var a;
a || (a = {});
})();
}
expect: {}
}
issue_3429_1: {
options = {
assignments: true,
side_effects: true,
unused: true,
}
input: {
var a = "PASS";
(function(b) {
b && (b = a = "FAIL");
})();
console.log(a);
}
expect: {
var a = "PASS";
(function(b) {
b = b && (a = "FAIL");
})();
console.log(a);
}
expect_stdout: "PASS"
}
issue_3429_2: {
options = {
assignments: true,
side_effects: true,
unused: true,
}
input: {
var a;
(function(b) {
b || (b = a = "FAIL");
})(42);
console.log(a);
}
expect: {
var a;
(function(b) {
b = b || (a = "FAIL");
})(42);
console.log(a);
}
expect_stdout: "undefined"
}
issue_3949_1: {
options = {
assignments: true,
evaluate: true,
reduce_vars: true,
}
input: {
var a = 42;
function f() {
var b = a;
b = b >> 2;
return 100 + b;
}
console.log(f());
}
expect: {
var a = 42;
function f() {
var b = a;
b >>= 2;
return 100 + b;
}
console.log(f());
}
expect_stdout: "110"
}
issue_3949_2: {
options = {
assignments: true,
evaluate: true,
reduce_vars: true,
}
input: {
var a = 42;
function f() {
var b = a;
b = 5 & b;
return 100 + b;
}
console.log(f());
}
expect: {
var a = 42;
function f() {
var b = a;
b &= 5;
return 100 + b;
}
console.log(f());
}
expect_stdout: "100"
}