Recommendations for C++

The following topics provide a list of known compilation issues that prevent automatic vectorization, as well as provide recommendations that help you to overcome the issues and generate vector code.

• Issue: Ineffective peeled/remainder loop(s) present
  
• Issue: Data type conversions present
  
• Issue: User function call(s) present
  
• Issue: Serialized user function call(s) present
  
• Issue: Scalar math function call(s) present
  
• Issue: System function call(s) present
  
• Issue: OpenMP function call(s) present
  
• Issue: Indirect function call(s) present
  
• Issue: Assumed dependency present
  
• Issue: Vector register spilling possible
  
• Issue: Possible inefficient memory access patterns present
  
• Issue: Inefficient memory access patterns present
  
• Issue: Potential underutilization of FMA instructions
  
• Issue: Inefficient processing of SIMD-enabled functions possible