117 lines
4.6 KiB
C++
117 lines
4.6 KiB
C++
//===-- 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"
|
|
#include "llvm/Target/TargetMachine.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) {
|
|
StringRef CPUName = CPU;
|
|
if (CPUName.empty())
|
|
CPUName = "generic";
|
|
// Parse features string.
|
|
ParseSubtargetFeatures(CPUName, /*TuneCPU*/ CPUName, FS);
|
|
|
|
// -msoft-float implies -mno-vx.
|
|
if (HasSoftFloat)
|
|
HasVector = false;
|
|
|
|
// -mno-vx implicitly disables all vector-related features.
|
|
if (!HasVector) {
|
|
HasVectorEnhancements1 = false;
|
|
HasVectorEnhancements2 = false;
|
|
HasVectorPackedDecimal = false;
|
|
HasVectorPackedDecimalEnhancement = false;
|
|
HasVectorPackedDecimalEnhancement2 = false;
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
SystemZCallingConventionRegisters *
|
|
SystemZSubtarget::initializeSpecialRegisters() {
|
|
if (isTargetXPLINK64())
|
|
return new SystemZXPLINK64Registers;
|
|
else if (isTargetELF())
|
|
return new SystemZELFRegisters;
|
|
else {
|
|
llvm_unreachable("Invalid Calling Convention. Cannot initialize Special "
|
|
"Call Registers!");
|
|
}
|
|
}
|
|
|
|
SystemZSubtarget::SystemZSubtarget(const Triple &TT, const std::string &CPU,
|
|
const std::string &FS,
|
|
const TargetMachine &TM)
|
|
: SystemZGenSubtargetInfo(TT, CPU, /*TuneCPU*/ 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), HasMiscellaneousExtensions3(false),
|
|
HasMessageSecurityAssist9(false), HasVectorEnhancements2(false),
|
|
HasVectorPackedDecimalEnhancement(false), HasEnhancedSort(false),
|
|
HasDeflateConversion(false), HasVectorPackedDecimalEnhancement2(false),
|
|
HasNNPAssist(false), HasBEAREnhancement(false),
|
|
HasResetDATProtection(false), HasProcessorActivityInstrumentation(false),
|
|
HasSoftFloat(false), TargetTriple(TT),
|
|
SpecialRegisters(initializeSpecialRegisters()),
|
|
InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
|
|
FrameLowering(SystemZFrameLowering::create(*this)) {}
|
|
|
|
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.
|
|
//
|
|
// FIXME: Explicitly check for functions: the datalayout is currently
|
|
// missing information about function pointers.
|
|
const DataLayout &DL = GV->getParent()->getDataLayout();
|
|
if (GV->getPointerAlignment(DL) == 1 && !GV->getValueType()->isFunctionTy())
|
|
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;
|
|
}
|