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Loop Strength Reduction Pass Does Not Work for Some Varialbles Related to Induction Variables
2019 Apr 15
2
Loop Strength Reduction Pass Does Not Work for Some Varialbles Related to Induction Variables
...of multiplications, four and two (if unrolled once), respectively. https://gcc.godbolt.org/z/1ks4Pt -- Momchil Velikov, Senior Compiler Engineer Arm -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20190415/1bc260bd/attachment.html>
Loop Strength Reduction Pass Does Not Work for Some Varialbles Related to Induction Variables
2019 Apr 15
2
Loop Strength Reduction Pass Does Not Work for Some Varialbles Related to Induction Variables
Dear all, Hi! Recently, I try to combine the passes SeparateConstOffsetFromGEP and LoopStrengthReduction to transform the multiplication in the lowered GEP IRs into addition. However, it seems LoopStrengthReduction is unable to remove all the multiplications for the element offset calculation. My test code is shown below and thanks a lot in advance for your time and suggestion!