validation-test/Sema/type_checker_perf/fast/rdar60961087.swift.gyb

// RUN: %scale-test --begin 1 --end 10  --step 1 --select NumLeafScopes %s
// REQUIRES: asserts,no_asan

func test(_ array: [UInt8]) {
  var bytes = array.makeIterator()

  while let firstByte = bytes.next() {
    let secondByte = bytes.next() ?? 0

    let encoded = (
      (firstByte & 0xF8) >> 3,
      %for i in range(0, N):
      ((firstByte & 0x07) << 2) | ((secondByte & 0xC0) >> 6),
      %end
      (firstByte & 0xF8) >> 3
    )
  }
}