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