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//===- SystemZSubtarget.cpp - SystemZ Subtarget Information -------*- C++ -*-=//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the SystemZ specific subclass of TargetSubtargetInfo.
//
//===----------------------------------------------------------------------===//
#include "SystemZSubtarget.h"
#include "SystemZ.h"
#include "llvm/GlobalValue.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegistry.h"
#define GET_SUBTARGETINFO_TARGET_DESC
#define GET_SUBTARGETINFO_CTOR
#include "SystemZGenSubtargetInfo.inc"
using namespace llvm;
SystemZSubtarget::SystemZSubtarget(const std::string &TT,
const std::string &CPU,
const std::string &FS):
SystemZGenSubtargetInfo(TT, CPU, FS), HasZ10Insts(false) {
std::string CPUName = CPU;
if (CPUName.empty())
CPUName = "z9";
// Parse features string.
ParseSubtargetFeatures(CPUName, FS);
}
/// True if accessing the GV requires an extra load.
bool SystemZSubtarget::GVRequiresExtraLoad(const GlobalValue* GV,
const TargetMachine& TM,
bool isDirectCall) const {
if (TM.getRelocationModel() == Reloc::PIC_) {
// Extra load is needed for all externally visible.
if (isDirectCall)
return false;
if (GV->hasLocalLinkage() || GV->hasHiddenVisibility())
return false;
return true;
}
return false;
}
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