Function wasmBrOnCastImpl

deps/v8/test/mjsunit/wasm/wasm-module-builder.js:2531–2540

(labelIdx, sourceType, targetType, opcode)

      wasmBrOnCastImpl(labelIdx, sourceType, targetType, kExprBrOnCastDescEqFail),
  ];
  function wasmBrOnCastImpl(labelIdx, sourceType, targetType, opcode) {
    labelIdx = wasmUnsignedLeb(labelIdx, kMaxVarInt32Size);
    let srcIsNullable = sourceType.opcode == kWasmRefNull;
    let tgtIsNullable = targetType.opcode == kWasmRefNull;
    flags = (tgtIsNullable << 1) + srcIsNullable;
    return [
      kGCPrefix, opcode, flags, ...labelIdx, ...wasmEncodeHeapType(sourceType),
      ...wasmEncodeHeapType(targetType)
    ];
  }
})();

function getOpcodeName(opcode) {