[all-commits] [llvm/llvm-project] e594b2: [IndVars] Check if WideInc available before trying...

[Nikita Popov via All-commits]

  Branch: refs/heads/release/19.x
  Home:   https://github.com/llvm/llvm-project
  Commit: e594b284810c73b09da9436fdc6f1cbbfb4a7924
      https://github.com/llvm/llvm-project/commit/e594b284810c73b09da9436fdc6f1cbbfb4a7924
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2024-09-03 (Tue, 03 Sep 2024)

  Changed paths:
    M llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
    A llvm/test/Transforms/IndVarSimplify/pr106239.ll

  Log Message:
  -----------
  [IndVars] Check if WideInc available before trying to use it

WideInc/WideIncExpr can be null. Previously this worked out
because the comparison with WideIncExpr would fail. Now we have
accesses to WideInc prior to that. Avoid the issue with an
explicit check.

Fixes https://github.com/llvm/llvm-project/issues/106239.

(cherry picked from commit c9a5e1b665dbba898e9981fd7d48881947e6560e)



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