1 //===- SystemZSubtarget.cpp - SystemZ Subtarget Information -------*- C++ -*-=// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file implements the SystemZ specific subclass of TargetSubtargetInfo. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "SystemZSubtarget.h" 15 #include "SystemZ.h" 16 #include "llvm/GlobalValue.h" 17 #include "llvm/Target/TargetMachine.h" 18 #include "llvm/Support/TargetRegistry.h" 19 20 #define GET_SUBTARGETINFO_TARGET_DESC 21 #define GET_SUBTARGETINFO_CTOR 22 #include "SystemZGenSubtargetInfo.inc" 23 24 using namespace llvm; 25 26 SystemZSubtarget::SystemZSubtarget(const std::string &TT, 27 const std::string &CPU, 28 const std::string &FS): 29 SystemZGenSubtargetInfo(TT, CPU, FS), HasZ10Insts(false) { 30 std::string CPUName = CPU; 31 if (CPUName.empty()) 32 CPUName = "z9"; 33 34 // Parse features string. 35 ParseSubtargetFeatures(CPUName, FS); 36 } 37 38 /// True if accessing the GV requires an extra load. 39 bool SystemZSubtarget::GVRequiresExtraLoad(const GlobalValue* GV, 40 const TargetMachine& TM, 41 bool isDirectCall) const { 42 if (TM.getRelocationModel() == Reloc::PIC_) { 43 // Extra load is needed for all externally visible. 44 if (isDirectCall) 45 return false; 46 47 if (GV->hasLocalLinkage() || GV->hasHiddenVisibility()) 48 return false; 49 50 return true; 51 } 52 53 return false; 54 } 55
