[all-commits] [llvm/llvm-project] 9d43f6: [LowerConstantIntrinsics] avoid crashing on alloca...

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  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9d43f6d7cee8887cb2a7a2442dffa4ef21ef4446
      https://github.com/llvm/llvm-project/commit/9d43f6d7cee8887cb2a7a2442dffa4ef21ef4446
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2021-04-19 (Mon, 19 Apr 2021)

  Changed paths:
    M llvm/lib/Analysis/MemoryBuiltins.cpp
    M llvm/test/Transforms/LowerConstantIntrinsics/objectsize_basic.ll

  Log Message:
  -----------
  [LowerConstantIntrinsics] avoid crashing on alloca with unexpected operand type

The test here is reduced from the fuzzer-generated crasher in:
https://llvm.org/PR50023
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33395

I don't know if this is the best or complete solution, but the
zext of the i42 type appears to match the behavior if we run a
weird type example like this through the IR optimizer with -O1.

Differential Revision: https://reviews.llvm.org/D100766