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enhance inline (#3832)

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This commit is contained in:
Alex Lam S.L
2020-04-30 21:33:46 +01:00
committed by GitHub
parent d900006973
commit f80d5b8c9e
3 changed files with 582 additions and 21 deletions
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36
lib/compress.js
View File

@@ -225,7 +225,7 @@ merge(Compressor.prototype, {
// output and performance.
descend(node, this);
var opt = node.optimize(this);
if (is_scope) {
if (is_scope && opt === node) {
opt.drop_unused(this);
descend(opt, this);
}
@@ -3981,6 +3981,38 @@ merge(Compressor.prototype, {
return self;
});
OPT(AST_Function, function(self, compressor) {
self.body = tighten_body(self.body, compressor);
if (compressor.option("inline")) for (var i = 0; i < self.body.length; i++) {
var stat = self.body[i];
if (stat instanceof AST_Directive) continue;
if (stat instanceof AST_Return) {
var call = stat.value;
if (!call || call.TYPE != "Call") break;
var fn = call.expression;
if (fn instanceof AST_SymbolRef) {
fn = fn.fixed_value();
}
if (!(fn instanceof AST_Lambda)) break;
if (fn.uses_arguments) break;
if (fn.contains_this()) break;
var j = fn.argnames.length;
if (j > 0 && compressor.option("inline") < 2) break;
if (j > self.argnames.length) break;
if (j < self.argnames.length && !compressor.drop_fargs(fn, call)) break;
while (--j >= 0) {
var arg = call.args[j];
if (!(arg instanceof AST_SymbolRef)) break;
if (arg.definition() !== self.argnames[j].definition()) break;
}
if (j >= 0) break;
return call.expression;
}
break;
}
return self;
});
AST_Scope.DEFMETHOD("drop_unused", function(compressor) {
if (!compressor.option("unused")) return;
if (compressor.has_directive("use asm")) return;
@@ -6133,7 +6165,7 @@ merge(Compressor.prototype, {
function can_substitute_directly() {
if (var_assigned) return;
if (compressor.option("inline") <= 1 && fn.argnames.length) return;
if (compressor.option("inline") < 2 && fn.argnames.length) return;
if (!fn.variables.all(function(def) {
return def.references.length < 2 && def.orig[0] instanceof AST_SymbolFunarg;
})) return;

518
test/compress/functions.js
View File

@@ -2877,7 +2877,7 @@ issue_2437: {
}
}
issue_2485: {
issue_2485_1: {
options = {
functions: true,
reduce_funcs: true,
@@ -2926,6 +2926,54 @@ issue_2485: {
expect_stdout: "6"
}
issue_2485_2: {
options = {
functions: true,
inline: true,
reduce_funcs: true,
reduce_vars: true,
unused: true,
}
input: {
var foo = function(bar) {
var n = function(a, b) {
return a + b;
};
var sumAll = function(arg) {
return arg.reduce(n, 0);
};
var runSumAll = function(arg) {
return sumAll(arg);
};
bar.baz = function(arg) {
var n = runSumAll(arg);
return (n.get = 1), n;
};
return bar;
};
var bar = foo({});
console.log(bar.baz([1, 2, 3]));
}
expect: {
var foo = function(bar) {
function n(a, b) {
return a + b;
}
function runSumAll(arg) {
return arg.reduce(n, 0);
}
bar.baz = function(arg) {
var n = runSumAll(arg);
return (n.get = 1), n;
};
return bar;
};
var bar = foo({});
console.log(bar.baz([1, 2, 3]));
}
expect_stdout: "6"
}
issue_3364: {
options = {
functions: true,
@@ -3113,9 +3161,7 @@ issue_3400_1: {
return console.log(o[g]), o;
}
function e() {
return [ 42 ].map(function(v) {
return h(v);
});
return [ 42 ].map(h);
}
return e();
}()[0].p);
@@ -3130,7 +3176,7 @@ issue_3400_2: {
options = {
collapse_vars: true,
inline: true,
passes: 2,
passes: 3,
reduce_funcs: true,
reduce_vars: true,
unused: true,
@@ -3158,11 +3204,11 @@ issue_3400_2: {
}
expect: {
void console.log(function g() {
return [ 42 ].map(function(v) {
return o = {
p: v
}, console.log(o[g]), o;
var o;
return [ 42 ].map(function(u) {
var o = {
p: u
};
return console.log(o[g]), o;
});
}()[0].p);
}
@@ -3568,8 +3614,8 @@ pr_3592_2: {
var g = [ "PASS" ];
console.log((z = "PASS", function(problem) {
return g[problem];
}((y = z, problem(y)))));
var z, y;
}(problem(z))));
var z;
}
expect_stdout: "PASS"
}
@@ -3635,9 +3681,7 @@ pr_3595_1: {
}
console.log((arg = "PASS", function(problem) {
return g[problem];
}(function(arg) {
return problem(arg);
}(arg))));
}(problem(arg))));
var arg;
}
expect_stdout: "PASS"
@@ -3678,9 +3722,7 @@ pr_3595_2: {
}
console.log(function(problem) {
return g[problem];
}(function(arg) {
return problem(arg);
}("PASS")));
}(problem("PASS")));
}
expect_stdout: "PASS"
}
@@ -4108,3 +4150,443 @@ issue_3821_2: {
}
expect_stdout: "PASS"
}
substitude: {
options = {
inline: true,
reduce_vars: true,
toplevel: true,
}
input: {
var o = {};
function f(a) {
return a === o ? "PASS" : "FAIL";
}
[
function() {
return f;
},
function() {
return function(b) {
return f(b);
};
},
function() {
"use strict";
return function(c) {
return f(c);
};
},
function() {
return function(c) {
"use strict";
return f(c);
};
},
function() {
return function(d, e) {
return f(d, e);
};
},
].forEach(function(g) {
console.log(g()(o));
console.log(g().call(o, o));
});
}
expect: {
var o = {};
function f(a) {
return a === o ? "PASS" : "FAIL";
}
[
function() {
return f;
},
function() {
return f;
},
function() {
"use strict";
return f;
},
function() {
return f;
},
function() {
return function(d, e) {
return f(d, e);
};
},
].forEach(function(g) {
console.log(g()(o));
console.log(g().call(o, o));
});
}
expect_stdout: [
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
]
}
substitude_arguments: {
options = {
inline: true,
reduce_vars: true,
toplevel: true,
}
input: {
var o = {};
function f() {
return arguments[0] === o ? "PASS" : "FAIL";
}
[
function() {
return f;
},
function() {
return function(b) {
return f(b);
};
},
function() {
"use strict";
return function(c) {
return f(c);
};
},
function() {
return function(c) {
"use strict";
return f(c);
};
},
function() {
return function(d, e) {
return f(d, e);
};
},
].forEach(function(g) {
console.log(g()(o));
console.log(g().call(o, o));
});
}
expect: {
var o = {};
function f() {
return arguments[0] === o ? "PASS" : "FAIL";
}
[
function() {
return f;
},
function() {
return function(b) {
return f(b);
};
},
function() {
"use strict";
return function(c) {
return f(c);
};
},
function() {
return function(c) {
"use strict";
return f(c);
};
},
function() {
return function(d, e) {
return f(d, e);
};
},
].forEach(function(g) {
console.log(g()(o));
console.log(g().call(o, o));
});
}
expect_stdout: [
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
]
}
substitude_drop_fargs: {
options = {
inline: true,
keep_fargs: false,
reduce_vars: true,
toplevel: true,
}
input: {
var o = {};
function f(a) {
return a === o ? "PASS" : "FAIL";
}
[
function() {
return f;
},
function() {
return function(b) {
return f(b);
};
},
function() {
"use strict";
return function(c) {
return f(c);
};
},
function() {
return function(c) {
"use strict";
return f(c);
};
},
function() {
return function(d, e) {
return f(d, e);
};
},
].forEach(function(g) {
console.log(g()(o));
console.log(g().call(o, o));
});
}
expect: {
var o = {};
function f(a) {
return a === o ? "PASS" : "FAIL";
}
[
function() {
return f;
},
function() {
return f;
},
function() {
"use strict";
return f;
},
function() {
return f;
},
function() {
return f;
},
].forEach(function(g) {
console.log(g()(o));
console.log(g().call(o, o));
});
}
expect_stdout: [
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
]
}
substitude_this: {
options = {
inline: true,
reduce_vars: true,
toplevel: true,
}
input: {
var o = {};
function f(a) {
return a === o ? this === o : "FAIL";
}
[
function() {
return f;
},
function() {
return function(b) {
return f(b);
};
},
function() {
"use strict";
return function(c) {
return f(c);
};
},
function() {
return function(c) {
"use strict";
return f(c);
};
},
function() {
return function(d, e) {
return f(d, e);
};
},
].forEach(function(g) {
console.log(g()(o));
console.log(g().call(o, o));
});
}
expect: {
var o = {};
function f(a) {
return a === o ? this === o : "FAIL";
}
[
function() {
return f;
},
function() {
return function(b) {
return f(b);
};
},
function() {
"use strict";
return function(c) {
return f(c);
};
},
function() {
return function(c) {
"use strict";
return f(c);
};
},
function() {
return function(d, e) {
return f(d, e);
};
},
].forEach(function(g) {
console.log(g()(o));
console.log(g().call(o, o));
});
}
expect_stdout: [
"false",
"true",
"false",
"false",
"false",
"false",
"false",
"false",
"false",
"false",
]
}
substitude_use_strict: {
options = {
inline: true,
reduce_vars: true,
toplevel: true,
}
input: {
var o = {};
function f(a) {
"use strict";
return a === o ? "PASS" : "FAIL";
}
[
function() {
return f;
},
function() {
return function(b) {
return f(b);
};
},
function() {
"use strict";
return function(c) {
return f(c);
};
},
function() {
return function(c) {
"use strict";
return f(c);
};
},
function() {
return function(d, e) {
return f(d, e);
};
},
].forEach(function(g) {
console.log(g()(o));
console.log(g().call(o, o));
});
}
expect: {
var o = {};
function f(a) {
"use strict";
return a === o ? "PASS" : "FAIL";
}
[
function() {
return f;
},
function() {
return f;
},
function() {
"use strict";
return f;
},
function() {
return f;
},
function() {
return function(d, e) {
return f(d, e);
};
},
].forEach(function(g) {
console.log(g()(o));
console.log(g().call(o, o));
});
}
expect_stdout: [
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
"PASS",
]
}

49
test/compress/reduce_vars.js
View File

@@ -4589,7 +4589,7 @@ perf_8: {
expect_stdout: "348150"
}
issue_2485: {
issue_2485_1: {
options = {
reduce_funcs: true,
reduce_vars: true,
@@ -4637,6 +4637,53 @@ issue_2485: {
expect_stdout: "6"
}
issue_2485_2: {
options = {
inline: true,
reduce_funcs: true,
reduce_vars: true,
unused: true,
}
input: {
var foo = function(bar) {
var n = function(a, b) {
return a + b;
};
var sumAll = function(arg) {
return arg.reduce(n, 0);
};
var runSumAll = function(arg) {
return sumAll(arg);
};
bar.baz = function(arg) {
var n = runSumAll(arg);
return (n.get = 1), n;
};
return bar;
};
var bar = foo({});
console.log(bar.baz([1, 2, 3]));
}
expect: {
var foo = function(bar) {
var n = function(a, b) {
return a + b;
};
var runSumAll = function(arg) {
return arg.reduce(n, 0);
};
bar.baz = function(arg) {
var n = runSumAll(arg);
return (n.get = 1), n;
};
return bar;
};
var bar = foo({});
console.log(bar.baz([1, 2, 3]));
}
expect_stdout: "6"
}
issue_2455: {
options = {
reduce_vars: true,