-//===- 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 TargetSubtargetInfo.
-//
-//===----------------------------------------------------------------------===//
#include "SystemZSubtarget.h"
-#include "SystemZ.h"
-#include "llvm/GlobalValue.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetRegistry.h"
+#include "llvm/IR/GlobalValue.h"
-#define GET_SUBTARGETINFO_ENUM
-#define GET_SUBTARGETINFO_MC_DESC
#define GET_SUBTARGETINFO_TARGET_DESC
#define GET_SUBTARGETINFO_CTOR
#include "SystemZGenSubtargetInfo.inc"
using namespace llvm;
-SystemZSubtarget::SystemZSubtarget(const std::string &TT,
+SystemZSubtarget::SystemZSubtarget(const std::string &TT,
const std::string &CPU,
- const std::string &FS):
- SystemZGenSubtargetInfo(TT, CPU, FS), HasZ10Insts(false) {
+ const std::string &FS)
+ : SystemZGenSubtargetInfo(TT, CPU, FS), TargetTriple(TT) {
std::string CPUName = CPU;
if (CPUName.empty())
- CPUName = "z9";
+ CPUName = "z10";
// 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 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 false;
-}
-
-MCSubtargetInfo *createSystemZMCSubtargetInfo(StringRef TT, StringRef CPU,
- StringRef FS) {
- MCSubtargetInfo *X = new MCSubtargetInfo();
- InitSystemZMCSubtargetInfo(X, TT, CPU, FS);
- return X;
+ return GV->hasLocalLinkage() || !GV->hasDefaultVisibility();
}
-extern "C" void LLVMInitializeSystemZMCSubtargetInfo() {
- TargetRegistry::RegisterMCSubtargetInfo(TheSystemZTarget,
- createSystemZMCSubtargetInfo);
+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;
}