[all-commits] [llvm/llvm-project] b606e2: [Evaluator] Bitcast result of pointer stripping

[aeubanks via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b606e2df4dd49c17c9f2733f2339b6dd0dd427de
      https://github.com/llvm/llvm-project/commit/b606e2df4dd49c17c9f2733f2339b6dd0dd427de
  Author: Arthur Eubanks <aeubanks at google.com>
  Date:   2021-04-21 (Wed, 21 Apr 2021)

  Changed paths:
    M llvm/lib/Transforms/Utils/Evaluator.cpp
    M llvm/test/Transforms/GlobalOpt/invariant.group.ll

  Log Message:
  -----------
  [Evaluator] Bitcast result of pointer stripping

Trying to evaluate a GEP would assert with
  "Ty == cast<PointerType>(C->getType()->getScalarType())->getElementType()"
because the type of the pointer we would evaluate the GEP argument to
would be a different type than the GEP was expecting. We should treat
pointer stripping as a bitcast.

The test adds a redundant GEP that would crash due to type mismatch.

Reviewed By: rnk

Differential Revision: https://reviews.llvm.org/D100970