forked from OSchip/llvm-project
68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
//===-- SystemZSubtarget.cpp - SystemZ subtarget information --------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "SystemZSubtarget.h"
|
|
#include "llvm/IR/GlobalValue.h"
|
|
#include "llvm/Support/Host.h"
|
|
#include "MCTargetDesc/SystemZMCTargetDesc.h"
|
|
|
|
#define GET_SUBTARGETINFO_TARGET_DESC
|
|
#define GET_SUBTARGETINFO_CTOR
|
|
#include "SystemZGenSubtargetInfo.inc"
|
|
|
|
using namespace llvm;
|
|
|
|
// Pin the vtabel to this file.
|
|
void SystemZSubtarget::anchor() {}
|
|
|
|
SystemZSubtarget::SystemZSubtarget(const std::string &TT,
|
|
const std::string &CPU,
|
|
const std::string &FS)
|
|
: SystemZGenSubtargetInfo(TT, CPU, FS), HasDistinctOps(false),
|
|
HasLoadStoreOnCond(false), HasHighWord(false), HasFPExtension(false),
|
|
TargetTriple(TT) {
|
|
std::string CPUName = CPU;
|
|
if (CPUName.empty())
|
|
CPUName = "generic";
|
|
#if defined(__linux__) && defined(__s390x__)
|
|
if (CPUName == "generic")
|
|
CPUName = sys::getHostCPUName();
|
|
#endif
|
|
|
|
// Parse features string.
|
|
ParseSubtargetFeatures(CPUName, FS);
|
|
}
|
|
|
|
// Return true if GV binds locally under reloc model RM.
|
|
static bool bindsLocally(const GlobalValue *GV, Reloc::Model RM) {
|
|
// For non-PIC, all symbols bind locally.
|
|
if (RM == Reloc::Static)
|
|
return true;
|
|
|
|
return GV->hasLocalLinkage() || !GV->hasDefaultVisibility();
|
|
}
|
|
|
|
bool SystemZSubtarget::isPC32DBLSymbol(const GlobalValue *GV,
|
|
Reloc::Model RM,
|
|
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 bindsLocally(GV, RM);
|
|
|
|
// 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;
|
|
}
|