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Florian Hahn 0429332422 [SCEV] Match 'zext (trunc A to iB) to iY' as URem.
URem operations with constant power-of-2 second operands are modeled as
such. This patch on its own has very little impact (e.g. no changes in
CodeGen for MultiSource/SPEC2000/SPEC2006 on X86 -O3 -flto), but I'll
soon post follow-up patches that make use of it to more accurately
determine the trip multiple.

Reviewed By: mkazantsev

Differential Revision: https://reviews.llvm.org/D89821
2020-10-29 10:46:52 +00:00
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