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enhance switches (#5005)

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closes #5004
This commit is contained in:
Alex Lam S.L
2021-06-15 03:32:39 +01:00
committed by GitHub
parent 6fc7a2ab6a
commit 498ac83541
3 changed files with 321 additions and 89 deletions
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68
test/compress/reduce_vars.js
View File

@@ -2071,72 +2071,6 @@ issue_1670_2: {
}
issue_1670_3: {
options = {
comparisons: true,
conditionals: true,
dead_code: true,
evaluate: true,
reduce_funcs: true,
reduce_vars: true,
side_effects: true,
switches: true,
typeofs: true,
unused: true,
}
input: {
(function f() {
switch (1) {
case 0:
var a = true;
break;
case 1:
if (typeof a === "undefined") console.log("PASS");
else console.log("FAIL");
}
})();
}
expect: {
(function() {
var a;
void 0 === a ? console.log("PASS") : console.log("FAIL");
})();
}
expect_stdout: "PASS"
}
issue_1670_4: {
options = {
conditionals: true,
dead_code: true,
evaluate: true,
passes: 2,
reduce_funcs: true,
reduce_vars: true,
side_effects: true,
switches: true,
unused: true,
}
input: {
(function f() {
switch (1) {
case 0:
var a = true;
break;
case 1:
if (typeof a === "undefined") console.log("PASS");
else console.log("FAIL");
}
})();
}
expect: {
(function() {
console.log("PASS");
})();
}
expect_stdout: "PASS"
}
issue_1670_5: {
options = {
conditionals: true,
dead_code: true,
@@ -2168,7 +2102,7 @@ issue_1670_5: {
expect_stdout: "1"
}
issue_1670_6: {
issue_1670_4: {
options = {
conditionals: true,
dead_code: true,

266
test/compress/switch.js → test/compress/switches.js
View File

@@ -300,6 +300,37 @@ drop_default_2: {
}
}
drop_default_3: {
options = {
dead_code: true,
evaluate: true,
switches: true,
}
input: {
function f() {
console.log("PASS");
return 42;
}
switch (42) {
case f():
break;
case void console.log("FAIL"):
default:
}
}
expect: {
function f() {
console.log("PASS");
return 42;
}
switch (42) {
case f():
case void console.log("FAIL"):
}
}
expect_stdout: "PASS"
}
keep_default: {
options = {
dead_code: true,
@@ -423,7 +454,6 @@ drop_case_3: {
switch ({}.p) {
default:
case void 0:
break;
case c = "FAIL":
}
console.log(c);
@@ -454,7 +484,166 @@ drop_case_4: {
expect_stdout: "PASS"
}
keep_case: {
drop_case_5: {
options = {
dead_code: true,
evaluate: true,
switches: true,
}
input: {
switch (42) {
case void console.log("PASS 1"):
console.log("FAIL 1");
case 42:
case console.log("FAIL 2"):
console.log("PASS 2");
}
}
expect: {
switch (42) {
case (void console.log("PASS 1"), 42):
console.log("PASS 2");
}
}
expect_stdout: [
"PASS 1",
"PASS 2",
]
}
drop_case_6: {
options = {
dead_code: true,
evaluate: true,
switches: true,
}
input: {
switch (console.log("PASS 1"), 2) {
case 0:
console.log("FAIL 1");
case (console.log("PASS 2"), 1):
console.log("FAIL 2");
}
}
expect: {
switch (console.log("PASS 1"), 2) {
case (console.log("PASS 2"), 1):
}
}
expect_stdout: [
"PASS 1",
"PASS 2",
]
}
drop_case_7: {
options = {
dead_code: true,
evaluate: true,
switches: true,
}
input: {
switch (2) {
case 0:
console.log("FAIL 1");
case (console.log("PASS 1"), 1):
console.log("FAIL 2");
case 2:
console.log("PASS 2");
}
}
expect: {
switch (2) {
case (console.log("PASS 1"), 1, 2):
console.log("PASS 2");
}
}
expect_stdout: [
"PASS 1",
"PASS 2",
]
}
drop_case_8: {
options = {
dead_code: true,
switches: true,
}
input: {
function log(msg) {
console.log(msg);
return msg;
}
switch (log("foo")) {
case "bar":
log("moo");
break;
case log("baz"):
log("moo");
break;
default:
log("moo");
}
}
expect: {
function log(msg) {
console.log(msg);
return msg;
}
switch (log("foo")) {
case "bar":
case log("baz"):
default:
log("moo");
}
}
expect_stdout: [
"foo",
"baz",
"moo",
]
}
drop_case_9: {
options = {
dead_code: true,
switches: true,
}
input: {
function log(msg) {
console.log(msg);
return msg;
}
switch (log("foo")) {
case log("bar"):
log("moo");
break;
case "baz":
log("moo");
break;
default:
log("moo");
}
}
expect: {
function log(msg) {
console.log(msg);
return msg;
}
switch (log("foo")) {
default:
log("bar");
log("moo");
}
}
expect_stdout: [
"foo",
"bar",
"moo",
]
}
keep_case_1: {
options = {
dead_code: true,
switches: true,
@@ -474,6 +663,76 @@ keep_case: {
}
}
keep_case_2: {
options = {
dead_code: true,
evaluate: true,
switches: true,
}
input: {
switch ("foo") {
case console.log("bar"):
case console.log("baz"), "moo":
}
}
expect: {
switch ("foo") {
case console.log("bar"):
case console.log("baz"), "moo":
}
}
expect_stdout: [
"bar",
"baz",
]
}
keep_case_3: {
options = {
dead_code: true,
evaluate: true,
switches: true,
}
input: {
var a;
switch (void console.log("PASS")) {
case a:
case console.log("FAIL"), 42:
}
}
expect: {
var a;
switch (void console.log("PASS")) {
case a:
case console.log("FAIL"), 42:
}
}
expect_stdout: "PASS"
}
keep_case_4: {
options = {
dead_code: true,
evaluate: true,
switches: true,
}
input: {
var a;
switch (void console.log("PASS")) {
case a:
case void console.log("FAIL"):
}
}
expect: {
var a;
switch (void console.log("PASS")) {
case a:
case void console.log("FAIL"):
}
}
expect_stdout: "PASS"
}
issue_376: {
options = {
dead_code: true,
@@ -1088,7 +1347,8 @@ drop_switch_6: {
}
}
expect: {
A === B;
A;
B;
x();
C !== D;
y();