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optimized global variable access

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This commit is contained in:
Fabrice Bellard
2025-11-03 16:57:20 +01:00
parent eb2c89087d
commit a6816be23a
3 changed files with 796 additions and 532 deletions
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11
quickjs-opcode.h
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@@ -123,17 +123,14 @@ DEF( regexp, 1, 2, 1, none) /* create a RegExp object from the pattern a
DEF( get_super, 1, 1, 1, none) DEF( get_super, 1, 1, 1, none)
DEF( import, 1, 2, 1, none) /* dynamic module import */ DEF( import, 1, 2, 1, none) /* dynamic module import */
DEF( get_var_undef, 5, 0, 1, atom) /* push undefined if the variable does not exist */ DEF( get_var_undef, 3, 0, 1, var_ref) /* push undefined if the variable does not exist */
DEF( get_var, 5, 0, 1, atom) /* throw an exception if the variable does not exist */ DEF( get_var, 3, 0, 1, var_ref) /* throw an exception if the variable does not exist */
DEF( put_var, 5, 1, 0, atom) /* must come after get_var */ DEF( put_var, 3, 1, 0, var_ref) /* must come after get_var */
DEF( put_var_init, 5, 1, 0, atom) /* must come after put_var. Used to initialize a global lexical variable */ DEF( put_var_init, 3, 1, 0, var_ref) /* must come after put_var. Used to initialize a global lexical variable */
DEF( get_ref_value, 1, 2, 3, none) DEF( get_ref_value, 1, 2, 3, none)
DEF( put_ref_value, 1, 3, 0, none) DEF( put_ref_value, 1, 3, 0, none)
DEF( define_var, 6, 0, 0, atom_u8)
DEF(check_define_var, 6, 0, 0, atom_u8)
DEF( define_func, 6, 1, 0, atom_u8)
DEF( get_field, 5, 1, 1, atom) DEF( get_field, 5, 1, 1, atom)
DEF( get_field2, 5, 1, 2, atom) DEF( get_field2, 5, 1, 2, atom)
DEF( put_field, 5, 2, 0, atom) DEF( put_field, 5, 2, 0, atom)

1287
quickjs.c
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File diff suppressed because it is too large Load Diff

30
tests/test_language.js
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@@ -368,7 +368,7 @@ function test_template_skip()
function test_object_literal() function test_object_literal()
{ {
var x = 0, get = 1, set = 2; async = 3; var x = 0, get = 1, set = 2, async = 3;
a = { get: 2, set: 3, async: 4, get a(){ return this.get} }; a = { get: 2, set: 3, async: 4, get a(){ return this.get} };
assert(JSON.stringify(a), '{"get":2,"set":3,"async":4,"a":2}'); assert(JSON.stringify(a), '{"get":2,"set":3,"async":4,"a":2}');
assert(a.a === 2); assert(a.a === 2);
@@ -628,6 +628,33 @@ function test_unicode_ident()
assert(typeof õ, "undefined"); assert(typeof õ, "undefined");
} }
/* check global variable optimization */
function test_global_var_opt()
{
var v2;
(1, eval)('var gvar1'); /* create configurable global variables */
gvar1 = 1;
Object.defineProperty(globalThis, "gvar1", { writable: false });
gvar1 = 2;
assert(gvar1, 1);
Object.defineProperty(globalThis, "gvar1", { get: function() { return "hello" },
set: function(v) { v2 = v; } });
assert(gvar1, "hello");
gvar1 = 3;
assert(v2, 3);
Object.defineProperty(globalThis, "gvar1", { value: 4, writable: true, configurable: true });
assert(gvar1, 4);
gvar1 = 6;
delete gvar1;
assert_throws(ReferenceError, function() { return gvar1 });
gvar1 = 5;
assert(gvar1, 5);
}
test_op1(); test_op1();
test_cvt(); test_cvt();
test_eq(); test_eq();
@@ -652,3 +679,4 @@ test_parse_semicolon();
test_optional_chaining(); test_optional_chaining();
test_parse_arrow_function(); test_parse_arrow_function();
test_unicode_ident(); test_unicode_ident();
test_global_var_opt();