contrib/llvm/lib/Target/Mips/MipsLegalizerInfo.cpp

   1 //===- MipsLegalizerInfo.cpp ------------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 /// \file
  10 /// This file implements the targeting of the Machinelegalizer class for Mips.
  11 /// \todo This should be generated by TableGen.
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "MipsLegalizerInfo.h"
  15 #include "MipsTargetMachine.h"
  16 #include "llvm/CodeGen/GlobalISel/LegalizerHelper.h"
  17
  18 using namespace llvm;
  19
  20 MipsLegalizerInfo::MipsLegalizerInfo(const MipsSubtarget &ST) {
  21   using namespace TargetOpcode;
  22
  23   const LLT s1 = LLT::scalar(1);
  24   const LLT s32 = LLT::scalar(32);
  25   const LLT s64 = LLT::scalar(64);
  26   const LLT p0 = LLT::pointer(0, 32);
  27
  28   getActionDefinitionsBuilder(G_ADD)
  29       .legalFor({s32})
  30       .clampScalar(0, s32, s32);
  31
  32   getActionDefinitionsBuilder(G_UADDE)
  33       .lowerFor({{s32, s1}});
  34
  35   getActionDefinitionsBuilder({G_LOAD, G_STORE})
  36       .legalForCartesianProduct({p0, s32}, {p0});
  37
  38   getActionDefinitionsBuilder(G_SELECT)
  39       .legalForCartesianProduct({p0, s32}, {s32})
  40       .minScalar(0, s32)
  41       .minScalar(1, s32);
  42
  43   getActionDefinitionsBuilder({G_AND, G_OR, G_XOR})
  44       .legalFor({s32})
  45       .clampScalar(0, s32, s32);
  46
  47   getActionDefinitionsBuilder({G_SHL, G_ASHR, G_LSHR})
  48       .legalFor({s32});
  49
  50   getActionDefinitionsBuilder({G_SDIV, G_SREM, G_UREM, G_UDIV})
  51       .legalFor({s32})
  52       .minScalar(0, s32)
  53       .libcallFor({s64});
  54
  55   getActionDefinitionsBuilder(G_ICMP)
  56       .legalFor({{s32, s32}})
  57       .minScalar(0, s32);
  58
  59   getActionDefinitionsBuilder(G_CONSTANT)
  60       .legalFor({s32})
  61       .clampScalar(0, s32, s32);
  62
  63   getActionDefinitionsBuilder(G_GEP)
  64       .legalFor({{p0, s32}});
  65
  66   getActionDefinitionsBuilder(G_FRAME_INDEX)
  67       .legalFor({p0});
  68
  69   getActionDefinitionsBuilder(G_GLOBAL_VALUE)
  70       .legalFor({p0});
  71
  72   computeTables();
  73   verify(*ST.getInstrInfo());
  74 }
  75
  76 bool MipsLegalizerInfo::legalizeCustom(MachineInstr &MI,
  77                                        MachineRegisterInfo &MRI,
  78                                        MachineIRBuilder &MIRBuilder,
  79                                        GISelChangeObserver &Observer) const {
  80
  81   using namespace TargetOpcode;
  82
  83   MIRBuilder.setInstr(MI);
  84
  85   return false;
  86 }