[all-commits] [llvm/llvm-project] f09b89: [SystemZ] Improve foldMemoryOperandImpl()

[Jonas Paulsson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: f09b891d4a3f1446f561f3287705fe29ddfe1432
      https://github.com/llvm/llvm-project/commit/f09b891d4a3f1446f561f3287705fe29ddfe1432
  Author: Jonas Paulsson <paulsson at linux.vnet.ibm.com>
  Date:   2020-03-25 (Wed, 25 Mar 2020)

  Changed paths:
    M llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
    A llvm/test/CodeGen/SystemZ/foldmemop-imm-01.ll
    A llvm/test/CodeGen/SystemZ/foldmemop-imm-02.mir

  Log Message:
  -----------
  [SystemZ] Improve foldMemoryOperandImpl()

A spilled load of an immediate can use MVHI/MVGHI instead.
A compare of a spilled register against an immediate can use CHSI/CGHSI.
A logical compare can use CLFHSI/CLGHSI.

Review: Ulrich Weigand

Differential Revision: https://reviews.llvm.org/D76055