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function assert(x) {
if (!x) throw 'error!';
}
var wast = `
(module
(type $i (func (param i32) (result i32)))
(memory $0 0)
(export "test" (func $test))
(func $test (; 0 ;) (type $i) (param $0 i32) (result i32)
(block (result i32)
(if (result i32)
(local.get $0)
(local.get $0)
(i32.const 0)
)
)
)
)
`;
function test() {
console.log("=== input wast ===" + wast);
function printOptions() {
console.log("optimizeLevel=" + Binaryen.getOptimizeLevel());
console.log("shrinkLevel=" + Binaryen.getShrinkLevel());
}
// Use defaults (should be equal to -Os below)
var module = Binaryen.parseText(wast);
console.log("=== unoptimized ===");
assert(module.validate());
console.log(module.emitText());
module.optimize();
console.log("=== optimized using defaults ===");
printOptions();
assert(module.validate());
console.log(module.emitText());
module.dispose();
// Use -O0 (should remove the block)
module = Binaryen.parseText(wast);
Binaryen.setOptimizeLevel(0);
Binaryen.setShrinkLevel(0);
module.optimize();
console.log("=== optimized with -O0 ===");
printOptions();
assert(module.validate());
console.log(module.emitText());
module.dispose();
// Use -Os (should remove the block and convert to a select)
module = Binaryen.parseText(wast);
Binaryen.setOptimizeLevel(2);
Binaryen.setShrinkLevel(1);
module.optimize();
console.log("=== optimized with -Os ===");
printOptions();
assert(module.validate());
console.log(module.emitText());
module.dispose();
}
Binaryen.ready.then(test);
|
