LLVM  13.0.0git
SystemZSubtarget.cpp
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1 //===-- SystemZSubtarget.cpp - SystemZ subtarget information --------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "SystemZSubtarget.h"
11 #include "llvm/IR/GlobalValue.h"
13 
14 using namespace llvm;
15 
16 #define DEBUG_TYPE "systemz-subtarget"
17 
18 #define GET_SUBTARGETINFO_TARGET_DESC
19 #define GET_SUBTARGETINFO_CTOR
20 #include "SystemZGenSubtargetInfo.inc"
21 
23  "systemz-subreg-liveness",
24  cl::desc("Enable subregister liveness tracking for SystemZ (experimental)"),
25  cl::Hidden);
26 
27 // Pin the vtable to this file.
28 void SystemZSubtarget::anchor() {}
29 
31 SystemZSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) {
32  StringRef CPUName = CPU;
33  if (CPUName.empty())
34  CPUName = "generic";
35  // Parse features string.
36  ParseSubtargetFeatures(CPUName, /*TuneCPU*/ CPUName, FS);
37 
38  // -msoft-float implies -mno-vx.
39  if (HasSoftFloat)
40  HasVector = false;
41 
42  // -mno-vx implicitly disables all vector-related features.
43  if (!HasVector) {
44  HasVectorEnhancements1 = false;
45  HasVectorEnhancements2 = false;
46  HasVectorPackedDecimal = false;
48  }
49 
50  return *this;
51 }
52 
54 SystemZSubtarget::initializeSpecialRegisters() {
55  if (isTargetXPLINK64())
56  return new SystemZXPLINK64Registers;
57  else if (isTargetELF())
58  return new SystemZELFRegisters;
59  else {
60  llvm_unreachable("Invalid Calling Convention. Cannot initialize Special "
61  "Call Registers!");
62  }
63 }
64 
65 SystemZSubtarget::SystemZSubtarget(const Triple &TT, const std::string &CPU,
66  const std::string &FS,
67  const TargetMachine &TM)
68  : SystemZGenSubtargetInfo(TT, CPU, /*TuneCPU*/ CPU, FS),
69  HasDistinctOps(false), HasLoadStoreOnCond(false), HasHighWord(false),
70  HasFPExtension(false), HasPopulationCount(false),
71  HasMessageSecurityAssist3(false), HasMessageSecurityAssist4(false),
72  HasResetReferenceBitsMultiple(false), HasFastSerialization(false),
73  HasInterlockedAccess1(false), HasMiscellaneousExtensions(false),
74  HasExecutionHint(false), HasLoadAndTrap(false),
75  HasTransactionalExecution(false), HasProcessorAssist(false),
76  HasDFPZonedConversion(false), HasEnhancedDAT2(false), HasVector(false),
77  HasLoadStoreOnCond2(false), HasLoadAndZeroRightmostByte(false),
78  HasMessageSecurityAssist5(false), HasDFPPackedConversion(false),
79  HasMiscellaneousExtensions2(false), HasGuardedStorage(false),
80  HasMessageSecurityAssist7(false), HasMessageSecurityAssist8(false),
81  HasVectorEnhancements1(false), HasVectorPackedDecimal(false),
82  HasInsertReferenceBitsMultiple(false), HasMiscellaneousExtensions3(false),
83  HasMessageSecurityAssist9(false), HasVectorEnhancements2(false),
84  HasVectorPackedDecimalEnhancement(false), HasEnhancedSort(false),
85  HasDeflateConversion(false), HasSoftFloat(false), TargetTriple(TT),
86  SpecialRegisters(initializeSpecialRegisters()),
87  InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
88  TSInfo(), FrameLowering() {}
89 
91 
93  return UseSubRegLiveness;
94 }
95 
97  CodeModel::Model CM) const {
98  // PC32DBL accesses require the low bit to be clear.
99  //
100  // FIXME: Explicitly check for functions: the datalayout is currently
101  // missing information about function pointers.
102  const DataLayout &DL = GV->getParent()->getDataLayout();
103  if (GV->getPointerAlignment(DL) == 1 && !GV->getValueType()->isFunctionTy())
104  return false;
105 
106  // For the small model, all locally-binding symbols are in range.
107  if (CM == CodeModel::Small)
108  return TLInfo.getTargetMachine().shouldAssumeDSOLocal(*GV->getParent(), GV);
109 
110  // For Medium and above, assume that the symbol is not within the 4GB range.
111  // Taking the address of locally-defined text would be OK, but that
112  // case isn't easy to detect.
113  return false;
114 }
llvm::SystemZSubtarget::isPC32DBLSymbol
bool isPC32DBLSymbol(const GlobalValue *GV, CodeModel::Model CM) const
Definition: SystemZSubtarget.cpp:96
llvm
Definition: AllocatorList.h:23
llvm::StringRef::empty
LLVM_NODISCARD bool empty() const
empty - Check if the string is empty.
Definition: StringRef.h:153
llvm::Value::getPointerAlignment
Align getPointerAlignment(const DataLayout &DL) const
Returns an alignment of the pointer value.
Definition: Value.cpp:892
llvm::SystemZSubtarget::ParseSubtargetFeatures
void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS)
llvm::DataLayout
A parsed version of the target data layout string in and methods for querying it.
Definition: DataLayout.h:112
llvm::Triple
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:45
llvm::cl::Hidden
@ Hidden
Definition: CommandLine.h:143
llvm::SystemZSubtarget::HasVectorEnhancements1
bool HasVectorEnhancements1
Definition: SystemZSubtarget.h:62
SystemZMCTargetDesc.h
llvm::SystemZSubtarget::isTargetXPLINK64
bool isTargetXPLINK64() const
Definition: SystemZSubtarget.h:266
llvm::SystemZXPLINK64Registers
XPLINK64 calling convention specific use registers Particular to z/OS when in 64 bit mode.
Definition: SystemZRegisterInfo.h:75
GlobalValue.h
TargetMachine.h
false
Definition: StackSlotColoring.cpp:142
llvm::CodeModel::Small
@ Small
Definition: CodeGen.h:28
llvm::SystemZSubtarget::HasVectorEnhancements2
bool HasVectorEnhancements2
Definition: SystemZSubtarget.h:67
llvm::Type::isFunctionTy
bool isFunctionTy() const
True if this is an instance of FunctionType.
Definition: Type.h:220
llvm::SystemZSubtarget::isTargetELF
bool isTargetELF() const
Definition: SystemZSubtarget.h:260
llvm::CodeModel::Model
Model
Definition: CodeGen.h:28
llvm::cl::opt< bool >
llvm::GlobalValue
Definition: GlobalValue.h:44
llvm::GlobalValue::getParent
Module * getParent()
Get the module that this global value is contained inside of...
Definition: GlobalValue.h:572
llvm::SystemZSubtarget::HasVector
bool HasVector
Definition: SystemZSubtarget.h:53
SystemZGenSubtargetInfo
llvm::TargetMachine
Primary interface to the complete machine description for the target machine.
Definition: TargetMachine.h:77
llvm::SystemZSubtarget
Definition: SystemZSubtarget.h:33
llvm::SystemZSubtarget::~SystemZSubtarget
~SystemZSubtarget()
Definition: SystemZSubtarget.cpp:90
SystemZSubtarget.h
llvm::StringRef
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:58
this
Analysis the ScalarEvolution expression for r is this
Definition: README.txt:8
llvm_unreachable
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:136
DL
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
Definition: AArch64SLSHardening.cpp:76
llvm::TargetMachine::shouldAssumeDSOLocal
bool shouldAssumeDSOLocal(const Module &M, const GlobalValue *GV) const
Definition: TargetMachine.cpp:94
UseSubRegLiveness
static cl::opt< bool > UseSubRegLiveness("systemz-subreg-liveness", cl::desc("Enable subregister liveness tracking for SystemZ (experimental)"), cl::Hidden)
llvm::SystemZCallingConventionRegisters
A SystemZ-specific class detailing special use registers particular for calling conventions.
Definition: SystemZRegisterInfo.h:46
llvm::TargetLoweringBase::getTargetMachine
const TargetMachine & getTargetMachine() const
Definition: TargetLowering.h:339
llvm::SystemZSubtarget::enableSubRegLiveness
bool enableSubRegLiveness() const override
Definition: SystemZSubtarget.cpp:92
llvm::SystemZSubtarget::HasSoftFloat
bool HasSoftFloat
Definition: SystemZSubtarget.h:71
llvm::X86AS::FS
@ FS
Definition: X86.h:188
llvm::SystemZELFRegisters
ELF calling convention specific use registers Particular when on zLinux in 64 bit mode.
Definition: SystemZRegisterInfo.h:97
llvm::Module::getDataLayout
const DataLayout & getDataLayout() const
Get the data layout for the module's target platform.
Definition: Module.cpp:397
llvm::GlobalValue::getValueType
Type * getValueType() const
Definition: GlobalValue.h:273
TM
const char LLVMTargetMachineRef TM
Definition: PassBuilderBindings.cpp:47
llvm::SystemZSubtarget::HasVectorPackedDecimal
bool HasVectorPackedDecimal
Definition: SystemZSubtarget.h:63
llvm::cl::desc
Definition: CommandLine.h:414
llvm::SystemZSubtarget::HasVectorPackedDecimalEnhancement
bool HasVectorPackedDecimalEnhancement
Definition: SystemZSubtarget.h:68
llvm::SystemZSubtarget::getSpecialRegisters
SystemZCallingConventionRegisters * getSpecialRegisters() const
Definition: SystemZSubtarget.h:91
llvm::SystemZSubtarget::SystemZSubtarget
SystemZSubtarget(const Triple &TT, const std::string &CPU, const std::string &FS, const TargetMachine &TM)
Definition: SystemZSubtarget.cpp:65