IRIS Power C User's Guide

Table of Contents

Introduction

About This Guide

What Is IRIS Power C?

What Is the IRIS Power C Analyzer?

Document Overview

Related Documentation

Reference Material

Style Conventions

1. Compiling with IRIS Power C

Compiler Command-Line Syntax

Generating a Listing File

Generating mp Source and Listing Files

Passing Options to PCA

Summary

2. How to Use IRIS Power C

Compiling Programs with PCA

Using PCA to Run Programs in Parallel

Examples

Summary

3. PCA Command-Line Options

pca Command-Line Syntax

Concurrentization Options

Optimization Options

Input-Output Options

Listing Options

Memory Management Options

Invariant IF Floating Options

Command Line Options for Portability

Summary

4. Power C Analyzer Directives

#pragma serial

#pragma concurrent

#pragma concurrent call

#pragma set chunksize, #pragma set numthreads, and #pragma set schedtype

#pragma no side effects

#pragma arl

#pragma distinct

#pragma inline and #pragma ipa

Memory Management pragmas

Parallelizing Loops that Deal with Linked Lists

5. Multiprocessing C Compiler Directives

Why Use Parallel Regions?

Parallel Regions

Synchronization

The lock Clause

6. PCA Transformations

Loop Concurrentization

Loop Reordering

Scalar Optimizations

Loop Rerolling

Loop Unrolling

Loop Fusion

Memory Management for Data Locality

7. In-lining and Interprocedural Analysis

In-lining and IPA Command-Line Options

In-lining Pragmas

Listing File Additions

In-lining/IPA Examples

Conditions That Inhibit In-lining

8. The PCA Listing

listoptions

Syntax Error/Warning Messages

A. Improving PCA Performance

B. Data-Dependence Analysis

Varieties of Data Dependence

Input and Output Sets

Data-Dependence Relations

Data-Dependence Direction Vectors

Loop-Carried Dependence

Data-Dependence Example

C. Run Time Environment Variables

Index