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2013 Jan 29
4
[LLVMdev] [Patch][Review Requested][Compilation Time] Avoid frequent copy of elements in LoopStrengthReduce
Hello,
This patch aims to improve compile time performance by increasing the SCEV vector size in LoopStrengthReduce. It is observed that the BaseRegs vector size is 4 in most cases, and elements are frequently copied when it is initialized as SmallVector<const SCEV *, 2> BaseRegs.
Our benchmark results show that the compilation time performance improved by ~0.5%.
Patch by Wan Xiaofei.