[all-commits] [llvm/llvm-project] 62ff99: [SystemZ] Improve foldMemoryOperandImpl().

[Jonas Paulsson via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 62ff9960d337cd24d633d7dd38b49baaee05cf26
      https://github.com/llvm/llvm-project/commit/62ff9960d337cd24d633d7dd38b49baaee05cf26
  Author: Jonas Paulsson <paulsson at linux.vnet.ibm.com>
  Date:   2020-03-10 (Tue, 10 Mar 2020)

  Changed paths:
    M llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
    M llvm/lib/Target/SystemZ/SystemZInstrFormats.td
    M llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
    M llvm/lib/Target/SystemZ/SystemZInstrInfo.h
    M llvm/lib/Target/SystemZ/SystemZInstrInfo.td
    A llvm/test/CodeGen/SystemZ/cond-move-10.ll
    A llvm/test/CodeGen/SystemZ/int-cmp-56.mir

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

Swap the compare operands if LHS is spilled while updating the CCMask:s of
the CC users. This is relatively straight forward since the live-in lists for
the CC register can be assumed to be correct during register allocation
(thanks to 659efa2).

Also fold a spilled operand of an LOCR/SELR into an LOC(G).

Review: Ulrich Weigand

Differential Revision: https://reviews.llvm.org/D67437