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Diffstat (limited to 'js/src/jit-test/tests/cacheir/typedarray-megamorphic-has.js')
-rw-r--r-- | js/src/jit-test/tests/cacheir/typedarray-megamorphic-has.js | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/typedarray-megamorphic-has.js b/js/src/jit-test/tests/cacheir/typedarray-megamorphic-has.js new file mode 100644 index 0000000000..e2348caca9 --- /dev/null +++ b/js/src/jit-test/tests/cacheir/typedarray-megamorphic-has.js @@ -0,0 +1,53 @@ +function has(k) { + var p = {}; + p[k] = 1; + + // TypedArrays intercept any TypedArray indices (canonical numeric indices in the spec), + // so when reading |k| from |ta| we shouldn't return the inherited property |p[k]|. + var ta = new Int32Array(10); + Object.setPrototypeOf(ta, p); + + // Assume sixteen different objects trigger a transition to a megamorphic IC. + var xs = [ + ta, + + {a:0}, {b:0}, {c:0}, {d:0}, {e:0}, {f:0}, {g:0}, {h:0}, + {j:0}, {k:0}, {l:0}, {m:0}, {n:0}, {o:0}, {p:0}, + ]; + + for (var i = 0; i < 100; ++i) { + var x = xs[i & 15]; + assertEq(k in x, false); + } +} + +// Make sure we use a distinct function for each test. +function test(fn) { + return Function(`return ${fn};`)(); +} + +// TypedArray index representable as an Int32. +test(has)(100); +test(has)("100"); + +// TypedArray index not representable as an Int32. +test(has)(4294967296); +test(has)("4294967296"); + +// Non-finite TypedArray indices. +test(has)(Infinity); +test(has)("Infinity"); + +test(has)(-Infinity); +test(has)("-Infinity"); + +test(has)(NaN); +test(has)("NaN"); + +// TypedArray index with fractional parts. +test(has)(1.1); +test(has)("1.1"); + +// TypedArray index with exponent parts. +test(has)(1e+25); +test(has)("1e+25"); |