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// |jit-test| skip-if: !wasmGcEnabled()
function typingModule(types, from, to, brParams, branchResults, fallthroughResults) {
return `(module
${types}
(func
(param ${brParams.join(' ')})
(result ${branchResults.join(' ')})
(block (result ${fallthroughResults.join(' ')})
(; push params onto the stack in the same order as they appear, leaving
the last param at the top of the stack. ;)
${brParams.map((_, i) => `local.get ${i}`).join('\n')}
br_on_cast 1 ${from} ${to}
)
unreachable
)
)`;
}
function validTyping(types, from, to, brParams, branchResults, fallthroughResults) {
wasmValidateText(typingModule(types, from, to, brParams, branchResults, fallthroughResults));
}
function invalidTyping(types, from, to, brParams, branchResults, fallthroughResults, error) {
wasmFailValidateText(typingModule(types, from, to, brParams, branchResults, fallthroughResults), error);
}
// valid: eqref -> struct
validTyping('(type $a (struct))', 'eqref', '(ref $a)', ['eqref'], ['(ref $a)'], ['eqref']);
// valid: eqref -> struct (and looser types on results)
validTyping('(type $a (struct))', 'eqref', '(ref $a)', ['eqref'], ['(ref null $a)'], ['anyref']);
// valid: eqref -> nullable struct (note that fallthrough becomes non-nullable)
validTyping('(type $a (struct))', 'eqref', '(ref null $a)', ['eqref'], ['(ref null $a)'], ['(ref eq)']);
// valid: struct -> struct (from anyref)
validTyping('(type $a (struct))', 'anyref', '(ref $a)', ['(ref $a)'], ['(ref $a)'], ['anyref']);
// valid: struct -> struct (canonicalized)
validTyping('(type $a (struct)) (type $b (struct))', '(ref $a)', '(ref $b)', ['(ref $a)'], ['(ref $b)'], ['(ref $b)']);
// valid: nullable struct -> non-nullable struct (canonicalized)
validTyping('(type $a (struct)) (type $b (struct))', '(ref null $a)', '(ref $b)', ['(ref null $a)'], ['(ref $b)'], ['(ref null $a)']);
// valid: nullable struct -> nullable struct (canonicalized)
validTyping('(type $a (struct)) (type $b (struct))', '(ref null $a)', '(ref null $b)', ['(ref null $a)'], ['(ref null $a)'], ['(ref $a)']);
// valid: eqref -> struct with extra arg
validTyping('(type $a (struct))', 'eqref', '(ref $a)', ['i32', 'eqref'], ['i32', '(ref $a)'], ['i32', 'eqref']);
// valid: eqref -> struct with two extra args
validTyping('(type $a (struct))', 'eqref', '(ref $a)', ['i32', 'f32', 'eqref'], ['i32', 'f32', '(ref $a)'], ['i32', 'f32', 'eqref']);
// invalid: block result type must have slot for casted-to type
invalidTyping('(type $a (struct))', 'eqref', '(ref $a)', ['eqref'], [], ['eqref'], /type mismatch/);
// invalid: block result type must be supertype of casted-to type
invalidTyping('(type $a (struct)) (type $b (struct (field i32)))', 'eqref', '(ref $a)', ['eqref'], ['(ref $b)'], ['(ref $a)'], /type mismatch/);
// invalid: input is missing extra i32 from the branch target type
invalidTyping('(type $a (struct))', 'eqref', '(ref $a)', ['f32', 'eqref'], ['i32', 'f32', '(ref $a)'], ['i32', 'f32', 'eqref'], /popping value/);
// invalid: input has extra [i32, f32] swapped from the branch target type
invalidTyping('(type $a (struct))', 'eqref', '(ref $a)', ['i32', 'f32', 'eqref'], ['f32', 'i32', '(ref $a)'], ['i32', 'f32', 'eqref'], /type mismatch/);
// invalid: input has extra [i32, f32] swapped from the branch fallthrough type
invalidTyping('(type $a (struct))', 'eqref', '(ref $a)', ['i32', 'f32', 'eqref'], ['i32', 'f32', '(ref $a)'], ['f32', 'i32', 'eqref'], /type mismatch/);
// invalid: casting to non-nullable but fallthrough not nullable
invalidTyping('(type $a (struct))', 'eqref', '(ref $a)', ['eqref'], ['(ref $a)'], ['(ref eq)'], /type mismatch/);
// invalid: struct -> struct (same recursion group)
invalidTyping('(rec (type $a (struct)) (type $b (struct)))', '(ref $a)', '(ref $b)', ['(ref $a)'], ['(ref $b)'], ['(ref $a)'], /type mismatch/);
// Simple runtime test of casting
{
let { makeA, makeB, isA, isB } = wasmEvalText(`(module
(type $a (sub (struct)))
(type $b (sub $a (struct (field i32))))
(func (export "makeA") (result eqref)
struct.new_default $a
)
(func (export "makeB") (result eqref)
struct.new_default $b
)
(func (export "isA") (param eqref) (result i32)
(block (result (ref $a))
local.get 0
br_on_cast 0 anyref (ref $a)
i32.const 0
br 1
)
drop
i32.const 1
)
(func (export "isB") (param eqref) (result i32)
(block (result (ref $a))
local.get 0
br_on_cast 0 anyref (ref $b)
i32.const 0
br 1
)
drop
i32.const 1
)
)`).exports;
let a = makeA();
let b = makeB();
assertEq(isA(a), 1);
assertEq(isA(b), 1);
assertEq(isB(a), 0);
assertEq(isB(b), 1);
}
// Runtime test of casting with extra values
{
function assertEqResults(a, b) {
if (!(a instanceof Array)) {
a = [a];
}
if (!(b instanceof Array)) {
b = [b];
}
if (a.length !== b.length) {
assertEq(a.length, b.length);
}
for (let i = 0; i < a.length; i++) {
let x = a[i];
let y = b[i];
// intentionally use loose equality to allow bigint to compare equally
// to number, as can happen with how we use the JS-API here.
assertEq(x == y, true);
}
}
function testExtra(values) {
let { makeT, makeF, select } = wasmEvalText(`(module
(type $t (struct))
(type $f (struct (field i32)))
(func (export "makeT") (result eqref)
struct.new_default $t
)
(func (export "makeF") (result eqref)
struct.new_default $f
)
(func (export "select") (param eqref) (result ${values.map((type) => type).join(" ")})
(block (result (ref $t))
local.get 0
br_on_cast 0 anyref (ref $t)
${values.map((type, i) => `${type}.const ${values.length + i}`).join("\n")}
br 1
)
drop
${values.map((type, i) => `${type}.const ${i}`).join("\n")}
)
)`).exports;
let t = makeT();
let f = makeF();
let trueValues = values.map((type, i) => i);
let falseValues = values.map((type, i) => values.length + i);
assertEqResults(select(t), trueValues);
assertEqResults(select(f), falseValues);
}
// multiples of primitive valtypes
for (let valtype of ['i32', 'i64', 'f32', 'f64']) {
testExtra([valtype]);
testExtra([valtype, valtype]);
testExtra([valtype, valtype, valtype]);
testExtra([valtype, valtype, valtype, valtype, valtype, valtype, valtype, valtype]);
}
// random sundry of valtypes
testExtra(['i32', 'f32', 'i64', 'f64']);
testExtra(['i32', 'f32', 'i64', 'f64', 'i32', 'f32', 'i64', 'f64']);
}
// This test causes the `values` vector returned by
// `OpIter<Policy>::readBrOnCast` to contain three entries, the last of which
// is the argument, hence is reftyped. This is used to verify an assertion to
// that effect in FunctionCompiler::brOnCastCommon.
{
let tOnCast =
`(module
(type $a (struct))
(func (export "onCast") (param f32 i32 eqref) (result f32 i32 (ref $a))
local.get 0
local.get 1
local.get 2
br_on_cast 0 anyref (ref $a)
unreachable
)
)`;
let { onCast } = wasmEvalText(tOnCast).exports;
}