-//===- SystemZSubtarget.cpp - SystemZ Subtarget Information -------*- C++ -*-=//
+//===-- SystemZSubtarget.cpp - SystemZ subtarget information --------------===//
//
// The LLVM Compiler Infrastructure
//
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
-//
-// This file implements the SystemZ specific subclass of TargetSubtarget.
-//
-//===----------------------------------------------------------------------===//
#include "SystemZSubtarget.h"
-#include "SystemZ.h"
-#include "llvm/GlobalValue.h"
-#include "llvm/Target/TargetMachine.h"
+#include "MCTargetDesc/SystemZMCTargetDesc.h"
+#include "llvm/IR/GlobalValue.h"
+#include "llvm/Support/Host.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "systemz-subtarget"
-#define GET_SUBTARGETINFO_CTOR
-#define GET_SUBTARGETINFO_MC_DESC
#define GET_SUBTARGETINFO_TARGET_DESC
-#include "SystemZGenSubtarget.inc"
+#define GET_SUBTARGETINFO_CTOR
+#include "SystemZGenSubtargetInfo.inc"
-using namespace llvm;
+// Pin the vtable to this file.
+void SystemZSubtarget::anchor() {}
-SystemZSubtarget::SystemZSubtarget(const std::string &TT,
- const std::string &CPU,
- const std::string &FS):
- SystemZGenSubtargetInfo(), HasZ10Insts(false) {
+SystemZSubtarget &
+SystemZSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) {
std::string CPUName = CPU;
if (CPUName.empty())
- CPUName = "z9";
-
+ CPUName = "generic";
+#if defined(__linux__) && defined(__s390x__)
+ if (CPUName == "generic")
+ CPUName = sys::getHostCPUName();
+#endif
// Parse features string.
- ParseSubtargetFeatures(FS, CPUName);
+ ParseSubtargetFeatures(CPUName, FS);
+ return *this;
}
-/// 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;
+SystemZSubtarget::SystemZSubtarget(const std::string &TT,
+ const std::string &CPU,
+ const std::string &FS,
+ const TargetMachine &TM)
+ : SystemZGenSubtargetInfo(TT, CPU, FS), HasDistinctOps(false),
+ HasLoadStoreOnCond(false), HasHighWord(false), HasFPExtension(false),
+ HasFastSerialization(false), HasInterlockedAccess1(false),
+ TargetTriple(TT), InstrInfo(initializeSubtargetDependencies(CPU, FS)),
+ TLInfo(TM, *this), TSInfo(*TM.getDataLayout()), FrameLowering() {}
+// 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;
}