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Add some more comments to the top of this file. 

llvm-svn: 72131
This commit is contained in:
Dan Gohman 2009-05-19 20:37:36 +00:00
parent adc70d6806
commit 97f70add3c
1 changed files with 8 additions and 1 deletions
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9
llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -7,8 +7,15 @@
//
//===----------------------------------------------------------------------===//
//
// This transformation analyzes and transforms the induction variables (and
// computations derived from them) into forms suitable for efficient execution
// on the target.
//
// This pass performs a strength reduction on array references inside loops that
// have as one or more of their components the loop induction variable.
// have as one or more of their components the loop induction variable, it
// rewrites expressions to take advantage of scaled-index addressing modes
// available on the target, and it performs a variety of other optimizations
// related to loop induction variables.
//
//===----------------------------------------------------------------------===//