2.11.1  Canonical Loop Nest Form
  2.11.2  Consistent Loop Schedules
  2.11.3  order Clause
  2.11.4  Worksharing-Loop Construct
   2.11.4.1  Determining the Schedule of a Worksharing-Loop
  2.11.5  SIMD Directives
   2.11.5.1  simd Construct
   2.11.5.2  Worksharing-Loop SIMD Construct
   2.11.5.3  declare simd Directive
  2.11.6  distribute Loop Constructs
   2.11.6.1  distribute Construct
   2.11.6.2  distribute simd Construct
   2.11.6.3  Distribute Parallel Worksharing-Loop Construct
   2.11.6.4  Distribute Parallel Worksharing-Loop SIMD Construct
  2.11.7  loop Construct
  2.11.8  scan Directive
  2.11.9  Loop Transformation Constructs
   2.11.9.1  tile Construct
   2.11.9.2  unroll Construct