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fix corner case in if_return (#5620)

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fixes #5619
This commit is contained in:
Alex Lam S.L
2022-08-17 02:10:33 +01:00
committed by GitHub
parent 8602d1ba17
commit 887e086890
2 changed files with 55 additions and 1 deletions
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3
lib/compress.js
View File

@@ -3620,7 +3620,7 @@ Compressor.prototype.compress = function(node) {
continue;
}
if (jump && jump === next) eliminate_returns(stat);
if (declare_only && jump && jump === next) eliminate_returns(stat);
}
return changed;
@@ -3787,6 +3787,7 @@ Compressor.prototype.compress = function(node) {
if (stat instanceof AST_Exit) {
var mode = match_return(stat, true);
if (mode) {
changed = true;
var value = trim_return(stat.value, mode);
if (value) return make_node(AST_SimpleStatement, value, { body: value });
return in_block ? null : make_node(AST_EmptyStatement, stat);

53
test/compress/if_return.js
View File

@@ -2305,3 +2305,56 @@ issue_5597: {
}
expect_stdout: "PASS"
}
issue_5619_1: {
options = {
if_return: true,
}
input: {
console.log(function() {
if (console)
if (console)
return "PASS";
var a = FAIL;
return "PASS";
}());
}
expect: {
console.log(function() {
if (console)
if (console)
return "PASS";
var a = FAIL;
return "PASS";
}());
}
expect_stdout: "PASS"
}
issue_5619_2: {
options = {
dead_code: true,
if_return: true,
loops: true,
}
input: {
console.log(function() {
if (console)
while (console)
return "PASS";
var a = FAIL;
return "PASS";
}());
}
expect: {
console.log(function() {
if (console) {
if (console)
return "PASS";
}
var a = FAIL;
return "PASS";
}());
}
expect_stdout: "PASS"
}