opt_strength_reduction_strict. NXP CodeWarrior Development Studio

Chapter 35 Pragmas for Optimization

Controls the use of strength reduction optimization.

Syntax

#pragma opt_strength_reduction on | off | reset

Remarks

If you enable this pragma, the compiler replaces array element arithmetic instructions with pointer arithmetic instructions to make loops faster.

This pragma does not correspond to any panel setting. By default, this settings is related to the

"global_optimizer" on page 471

level.

35.13 opt_strength_reduction_strict

Uses a safer variation of strength reduction optimization.

Syntax

#pragma opt_strength_reduction_strict on | off | reset

Remarks

Like the

opt_strength_reduction pragma, this setting replaces multiplication instructions

that are inside loops with addition instructions to speed up the loops. However, unlike the regular strength reduction optimization, this variation ensures that the optimization is only applied when the array element arithmetic is not of an unsigned type that is smaller than a pointer type.

This pragma does not correspond to any panel setting. The default varies according to the compiler.

35.14 opt_unroll_loops

Controls the use of loop unrolling optimization.

Syntax

#pragma opt_unroll_loops on | off | reset

Remarks

CodeWarrior Development Studio for Power Architecture Processors Build Tools Reference Manual, Rev.

10.6, 02/2014

Freescale Semiconductor, Inc.

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