js/src/jit-test/tests/arguments/access-formals.js@6474c204b198 (annotated)
js/src/jit-test/tests/arguments/access-formals.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | function g1(x, args) { |
| michael@0 | 2 | args[0] = 88; |
| michael@0 | 3 | } |
| michael@0 | 4 | |
| michael@0 | 5 | // We assume we can optimize arguments access in |f|. |
| michael@0 | 6 | // |
| michael@0 | 7 | // Then the apply-call invalidates the arguments optimization, |
| michael@0 | 8 | // and creates a real arguments object. |
| michael@0 | 9 | // |
| michael@0 | 10 | // Test that x and y fetch the values from the args object when |
| michael@0 | 11 | // that happens. |
| michael@0 | 12 | function f1(x, y, o) { |
| michael@0 | 13 | var res = 0; |
| michael@0 | 14 | for (var i=0; i<50; i++) { |
| michael@0 | 15 | res += x + y; |
| michael@0 | 16 | if (i > 10) |
| michael@0 | 17 | o.apply(null, arguments); |
| michael@0 | 18 | } |
| michael@0 | 19 | return res; |
| michael@0 | 20 | } |
| michael@0 | 21 | |
| michael@0 | 22 | var o1 = {apply: g1}; |
| michael@0 | 23 | assertEq(f1(3, 5, o1), 3630); |
| michael@0 | 24 | assertEq(f1(3, 5, o1), 3630); |
| michael@0 | 25 | |
| michael@0 | 26 | // In strict mode, the arguments object does not alias formals. |
| michael@0 | 27 | function g2(x, args) { |
| michael@0 | 28 | args[0] = 88; |
| michael@0 | 29 | } |
| michael@0 | 30 | |
| michael@0 | 31 | function f2(x, y, o) { |
| michael@0 | 32 | "use strict"; |
| michael@0 | 33 | var res = 0; |
| michael@0 | 34 | for (var i=0; i<50; i++) { |
| michael@0 | 35 | res += x + y; |
| michael@0 | 36 | if (i > 10) |
| michael@0 | 37 | o.apply(null, arguments); |
| michael@0 | 38 | } |
| michael@0 | 39 | return res; |
| michael@0 | 40 | } |
| michael@0 | 41 | |
| michael@0 | 42 | var o2 = {apply: g2}; |
| michael@0 | 43 | assertEq(f2(3, 5, o2), 400); |
| michael@0 | 44 | assertEq(f2(3, 5, o2), 400); |
