[PATCH] D69639: Add support for lowering 32-bit/64-bit pointers

[Amy Huang via Phabricator via llvm-commits]

akhuang created this revision.
akhuang added reviewers: rnk, craig.topper, RKSimon.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

This follows a previous patch that changes the X86 datalayout to represent
mixed size pointers (32-bit sext, 32-bit zext, and 64-bit) with address spaces
(https://reviews.llvm.org/D64931)

This patch implements the address space cast lowering to the corresponding
sign extension, zero extension, or truncate instructions.

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


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D69639

Files:
  llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
  llvm/lib/Target/X86/X86.h
  llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/mixed-ptr-sizes.ll

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