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warn & drop #__PURE__ iff IIFE is dropped (#1511)

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- consolidate `side-effects` optimisations
- improve string `+` optimisation
- enhance literal & `conditionals` optimisations
This commit is contained in:
Alex Lam S.L
2017-02-28 02:25:44 +08:00
committed by GitHub
parent 0b0296eb2a
commit 858e6c78a4
8 changed files with 216 additions and 99 deletions
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58
test/compress/issue-1261.js
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@@ -116,3 +116,61 @@ pure_function_calls_toplevel: {
"WARN: Dropping unused variable iife1 [test/compress/issue-1261.js:84,12]",
]
}
should_warn: {
options = {
booleans: true,
conditionals: true,
evaluate: true,
side_effects: true,
}
input: {
/* @__PURE__ */(function(){x})(), void/* @__PURE__ */(function(){y})();
/* @__PURE__ */(function(){x})() || true ? foo() : bar();
true || /* @__PURE__ */(function(){y})() ? foo() : bar();
/* @__PURE__ */(function(){x})() && false ? foo() : bar();
false && /* @__PURE__ */(function(){y})() ? foo() : bar();
/* @__PURE__ */(function(){x})() + "foo" ? bar() : baz();
"foo" + /* @__PURE__ */(function(){y})() ? bar() : baz();
/* @__PURE__ */(function(){x})() ? foo() : foo();
[/* @__PURE__ */(function(){x})()] ? foo() : bar();
!{ foo: /* @__PURE__ */(function(){x})() } ? bar() : baz();
}
expect: {
foo();
foo();
bar();
bar();
bar();
bar();
foo();
foo();
baz();
}
expect_warnings: [
"WARN: Dropping __PURE__ call [test/compress/issue-1261.js:128,61]",
"WARN: Dropping __PURE__ call [test/compress/issue-1261.js:128,23]",
"WARN: Dropping side-effect-free statement [test/compress/issue-1261.js:128,23]",
"WARN: Boolean || always true [test/compress/issue-1261.js:129,23]",
"WARN: Dropping __PURE__ call [test/compress/issue-1261.js:129,23]",
"WARN: Condition always true [test/compress/issue-1261.js:129,23]",
"WARN: Boolean || always true [test/compress/issue-1261.js:130,8]",
"WARN: Condition always true [test/compress/issue-1261.js:130,8]",
"WARN: Boolean && always false [test/compress/issue-1261.js:131,23]",
"WARN: Dropping __PURE__ call [test/compress/issue-1261.js:131,23]",
"WARN: Condition always false [test/compress/issue-1261.js:131,23]",
"WARN: Boolean && always false [test/compress/issue-1261.js:132,8]",
"WARN: Condition always false [test/compress/issue-1261.js:132,8]",
"WARN: + in boolean context always true [test/compress/issue-1261.js:133,23]",
"WARN: Dropping __PURE__ call [test/compress/issue-1261.js:133,23]",
"WARN: Condition always true [test/compress/issue-1261.js:133,23]",
"WARN: + in boolean context always true [test/compress/issue-1261.js:134,8]",
"WARN: Dropping __PURE__ call [test/compress/issue-1261.js:134,31]",
"WARN: Condition always true [test/compress/issue-1261.js:134,8]",
"WARN: Dropping __PURE__ call [test/compress/issue-1261.js:135,23]",
"WARN: Dropping __PURE__ call [test/compress/issue-1261.js:136,24]",
"WARN: Condition always true [test/compress/issue-1261.js:136,8]",
"WARN: Dropping __PURE__ call [test/compress/issue-1261.js:137,31]",
"WARN: Condition always false [test/compress/issue-1261.js:137,8]",
]
}