[all-commits] [llvm/llvm-project] cebd63: [ConstantFolding] check applicability of AllOnes c...

[Jameson Nash via All-commits]

  Branch: refs/heads/release/11.x
  Home:   https://github.com/llvm/llvm-project
  Commit: cebd637c88624dfd44520848cb1f43dc8a02ba80
      https://github.com/llvm/llvm-project/commit/cebd637c88624dfd44520848cb1f43dc8a02ba80
  Author: Jameson Nash <vtjnash at gmail.com>
  Date:   2020-07-21 (Tue, 21 Jul 2020)

  Changed paths:
    M llvm/lib/Analysis/ConstantFolding.cpp
    A llvm/test/Analysis/ConstantFolding/allones.ll

  Log Message:
  -----------
  [ConstantFolding] check applicability of AllOnes constant creation first

The getAllOnesValue can only handle things that are bitcast from a
ConstantInt, while here we bitcast through a pointer, so we may see more
complex objects (like Array or Struct).

Differential Revision: https://reviews.llvm.org/D83870

(cherry picked from commit 8b354cc8db413f596c95b4f3240fabaa3e2c931e)