[all-commits] [llvm/llvm-project] 7d3b47: Revert "[SCEV] Use nw flag and symbolic iteration ...

[Nikita Popov via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 7d3b475810baa26eb862bb555a0335eec6b988fc
      https://github.com/llvm/llvm-project/commit/7d3b475810baa26eb862bb555a0335eec6b988fc
  Author: Nikita Popov <nikita.ppv at gmail.com>
  Date:   2020-10-16 (Fri, 16 Oct 2020)

  Changed paths:
    M llvm/include/llvm/Analysis/ScalarEvolution.h
    M llvm/lib/Analysis/ScalarEvolution.cpp
    M llvm/test/Analysis/ScalarEvolution/no-wrap-symbolic-becount.ll
    M llvm/test/Transforms/IndVarSimplify/X86/eliminate-trunc.ll
    M llvm/test/Transforms/IndVarSimplify/promote-iv-to-eliminate-casts.ll

  Log Message:
  -----------
  Revert "[SCEV] Use nw flag and symbolic iteration count to sharpen ranges of AddRecs"

This reverts commit 905101c36025fe1c8ecdf9a20cd59db036676073.

This causes a large compile-time regression:
https://llvm-compile-time-tracker.com/compare.php?from=cc175c2cc8e638462bab74e0781e06f9b6eb5017&to=905101c36025fe1c8ecdf9a20cd59db036676073&stat=instructions