[all-commits] [llvm/llvm-project] 6ffb3a: [SCEV] Use constant ranges when determining reacha...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6ffb3ad631c5071ce82c8b6c73dd1c88e0452944
      https://github.com/llvm/llvm-project/commit/6ffb3ad631c5071ce82c8b6c73dd1c88e0452944
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2022-03-18 (Fri, 18 Mar 2022)

  Changed paths:
    M llvm/include/llvm/Analysis/ScalarEvolution.h
    M llvm/lib/Analysis/ScalarEvolution.cpp
    A llvm/test/Transforms/IndVarSimplify/pr54434.ll

  Log Message:
  -----------
  [SCEV] Use constant ranges when determining reachable blocks (PR54434)

This avoids false positive verification failures if the condition
is not literally true/false, but SCEV still makes use of the fact
that a loop is not reachable through more complex reasoning.

Fixes https://github.com/llvm/llvm-project/issues/54434.