[all-commits] [llvm/llvm-project] 8b59c2: Extend or truncate __ptr32/__ptr64 pointers when d...

[Amy Huang via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 8b59c26bf347be5d96487c89849c0c1108bb3c42
      https://github.com/llvm/llvm-project/commit/8b59c26bf347be5d96487c89849c0c1108bb3c42
  Author: Amy Huang <akhuang at google.com>
  Date:   2020-06-26 (Fri, 26 Jun 2020)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/mixed-ptr-sizes-i686.ll
    M llvm/test/CodeGen/X86/mixed-ptr-sizes.ll

  Log Message:
  -----------
  Extend or truncate __ptr32/__ptr64 pointers when dereferenced.

Summary:
A while ago I implemented the functionality to lower Microsoft __ptr32
and __ptr64 pointers, which are stored as 32-bit and 64-bit pointer
and are extended/truncated to the appropriate pointer size when
dereferenced.
This patch adds an addrspacecast to cast from the __ptr32/__ptr64
pointer to a default address space when dereferencing.

Bug: https://bugs.llvm.org/show_bug.cgi?id=42359

Reviewers: hans, arsenm, RKSimon

Subscribers: wdng, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D81517