| //===-- SystemZSubtarget.cpp - SystemZ subtarget information --------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "SystemZSubtarget.h" |
| #include "MCTargetDesc/SystemZMCTargetDesc.h" |
| #include "llvm/IR/GlobalValue.h" |
| |
| using namespace llvm; |
| |
| #define DEBUG_TYPE "systemz-subtarget" |
| |
| #define GET_SUBTARGETINFO_TARGET_DESC |
| #define GET_SUBTARGETINFO_CTOR |
| #include "SystemZGenSubtargetInfo.inc" |
| |
| static cl::opt<bool> UseSubRegLiveness( |
| "systemz-subreg-liveness", |
| cl::desc("Enable subregister liveness tracking for SystemZ (experimental)"), |
| cl::Hidden); |
| |
| // Pin the vtable to this file. |
| void SystemZSubtarget::anchor() {} |
| |
| SystemZSubtarget & |
| SystemZSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) { |
| std::string CPUName = CPU; |
| if (CPUName.empty()) |
| CPUName = "generic"; |
| // Parse features string. |
| ParseSubtargetFeatures(CPUName, FS); |
| return *this; |
| } |
| |
| SystemZSubtarget::SystemZSubtarget(const Triple &TT, const std::string &CPU, |
| const std::string &FS, |
| const TargetMachine &TM) |
| : SystemZGenSubtargetInfo(TT, CPU, FS), HasDistinctOps(false), |
| HasLoadStoreOnCond(false), HasHighWord(false), HasFPExtension(false), |
| HasPopulationCount(false), HasMessageSecurityAssist3(false), |
| HasMessageSecurityAssist4(false), HasResetReferenceBitsMultiple(false), |
| HasFastSerialization(false), HasInterlockedAccess1(false), |
| HasMiscellaneousExtensions(false), |
| HasExecutionHint(false), HasLoadAndTrap(false), |
| HasTransactionalExecution(false), HasProcessorAssist(false), |
| HasDFPZonedConversion(false), HasEnhancedDAT2(false), |
| HasVector(false), HasLoadStoreOnCond2(false), |
| HasLoadAndZeroRightmostByte(false), HasMessageSecurityAssist5(false), |
| HasDFPPackedConversion(false), |
| HasMiscellaneousExtensions2(false), HasGuardedStorage(false), |
| HasMessageSecurityAssist7(false), HasMessageSecurityAssist8(false), |
| HasVectorEnhancements1(false), HasVectorPackedDecimal(false), |
| HasInsertReferenceBitsMultiple(false), |
| TargetTriple(TT), InstrInfo(initializeSubtargetDependencies(CPU, FS)), |
| TLInfo(TM, *this), TSInfo(), FrameLowering() {} |
| |
| |
| bool SystemZSubtarget::enableSubRegLiveness() const { |
| return UseSubRegLiveness; |
| } |
| |
| bool SystemZSubtarget::isPC32DBLSymbol(const GlobalValue *GV, |
| CodeModel::Model CM) const { |
| // PC32DBL accesses require the low bit to be clear. Note that a zero |
| // value selects the default alignment and is therefore OK. |
| if (GV->getAlignment() == 1) |
| return false; |
| |
| // For the small model, all locally-binding symbols are in range. |
| if (CM == CodeModel::Small) |
| return TLInfo.getTargetMachine().shouldAssumeDSOLocal(*GV->getParent(), GV); |
| |
| // For Medium and above, assume that the symbol is not within the 4GB range. |
| // Taking the address of locally-defined text would be OK, but that |
| // case isn't easy to detect. |
| return false; |
| } |