[all-commits] [llvm/llvm-project] d266fd: [IndVars] Remove exiting conditions that are trivi...

[max-azul via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: d266fd960e73e2ebdcc194564fc2554ff629d12a
      https://github.com/llvm/llvm-project/commit/d266fd960e73e2ebdcc194564fc2554ff629d12a
  Author: Max Kazantsev <mkazantsev at azul.com>
  Date:   2020-09-29 (Tue, 29 Sep 2020)

  Changed paths:
    M llvm/lib/Transforms/Scalar/IndVarSimplify.cpp
    M llvm/test/Transforms/IndVarSimplify/eliminate-comparison.ll

  Log Message:
  -----------
  [IndVars] Remove exiting conditions that are trivially true/false

When removing exiting loop conditions, we only consider checks for
which we know the exact exit count. We could also eliminate checks for
which the condition is always true/false.

Differential Revision: https://reviews.llvm.org/D87344
Reviewed By: lebedev.ri, reames