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28 lines
1.2 KiB
TeX
28 lines
1.2 KiB
TeX
\cchapter{Loop Transformations}{loop_transformations}
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\label{chap:loop_transformations}
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To obtain better performance on a platform, code may need to be restructured
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relative to the way it is written (which is often for best readability).
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User-directed loop transformations accomplish this goal by providing a means
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to separate code semantics and its optimization.
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A loop transformation construct states that a transformation operation is to be
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performed on set of nested loops. This directive approach can target specific loops
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for transformation, rather than applying more time-consuming general compiler
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heuristics methods with compiler options that may not be able to discover
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optimal transformations.
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Loop transformations can be augmented by preprocessor support or OpenMP \kcode{metadirective}
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directives, to select optimal dimension and size parameters for specific platforms,
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facilitating a single code base for multiple platforms.
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Moreover, directive-based transformations make experimenting easier:
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whereby specific hot spots can be affected by transformation directives.
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%===== Examples Sections =====
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\input{loop_transformations/tile}
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\input{loop_transformations/partial_tile}
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\input{loop_transformations/unroll}
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\input{loop_transformations/apply}
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