[all-commits] [llvm/llvm-project] e47977: Revert "[ScalarEvolution] Fix overflow in computeB...

[Martin Storsjö via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e479777d3c8e27f7e236edc9e18d0d7118d0fcfd
      https://github.com/llvm/llvm-project/commit/e479777d3c8e27f7e236edc9e18d0d7118d0fcfd
  Author: Martin Storsjö <martin at martin.st>
  Date:   2021-07-09 (Fri, 09 Jul 2021)

  Changed paths:
    M llvm/include/llvm/Analysis/ScalarEvolution.h
    M llvm/lib/Analysis/ScalarEvolution.cpp
    M llvm/test/Analysis/ScalarEvolution/2008-11-18-Stride1.ll
    M llvm/test/Analysis/ScalarEvolution/2008-11-18-Stride2.ll
    M llvm/test/Analysis/ScalarEvolution/lt-overflow.ll
    M llvm/test/Analysis/ScalarEvolution/max-trip-count.ll
    M llvm/test/Analysis/ScalarEvolution/trip-count-unknown-stride.ll
    M llvm/test/Analysis/ScalarEvolution/trip-count13.ll

  Log Message:
  -----------
  Revert "[ScalarEvolution] Fix overflow in computeBECount."

This reverts commit 5b350183cdabd83573bc760ddf513f3e1d991bcb (and
also "[NFC][ScalarEvolution] Cleanup howManyLessThans.",
009436e9c1fee1290d62bc0faafe0c0295542f56, to make it apply).

See https://reviews.llvm.org/D105216 for discussion on various
miscompilations caused by that commit.