[all-commits] [llvm/llvm-project] 4f5af9: [ValueTracking] Fix usage of DataLayout::getTypeSt...

[huihzhang via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 4f5af9d70dcca15bb639042cdf054b57a7e4836f
      https://github.com/llvm/llvm-project/commit/4f5af9d70dcca15bb639042cdf054b57a7e4836f
  Author: Huihui Zhang <huihuiz at quicinc.com>
  Date:   2020-03-20 (Fri, 20 Mar 2020)

  Changed paths:
    M llvm/include/llvm/Support/TypeSize.h
    M llvm/lib/Analysis/ValueTracking.cpp
    A llvm/test/Transforms/MemCpyOpt/store-to-memset-is-nonzero-type.ll

  Log Message:
  -----------
  [ValueTracking] Fix usage of DataLayout::getTypeStoreSize()

Summary:
DataLayout::getTypeStoreSize() returns TypeSize.

For cases where it can not be scalable vector (e.g., GlobalVariable),
explicitly call TypeSize::getFixedSize().

For cases where scalable property doesn't matter, (e.g., check for
zero-sized type), use TypeSize::isNonZero().

Reviewers: sdesmalen, efriedma, apazos, reames

Reviewed By: efriedma

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D76454