1 //===-- SystemZSubtarget.cpp - SystemZ subtarget information --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "SystemZSubtarget.h"
11 #include "MCTargetDesc/SystemZMCTargetDesc.h"
12 #include "llvm/IR/GlobalValue.h"
16 #define DEBUG_TYPE "systemz-subtarget"
18 #define GET_SUBTARGETINFO_TARGET_DESC
19 #define GET_SUBTARGETINFO_CTOR
20 #include "SystemZGenSubtargetInfo.inc"
22 // Pin the vtable to this file.
23 void SystemZSubtarget::anchor() {}
26 SystemZSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) {
27 std::string CPUName = CPU;
30 // Parse features string.
31 ParseSubtargetFeatures(CPUName, FS);
35 SystemZSubtarget::SystemZSubtarget(const std::string &TT,
36 const std::string &CPU,
37 const std::string &FS,
38 const TargetMachine &TM)
39 : SystemZGenSubtargetInfo(TT, CPU, FS), HasDistinctOps(false),
40 HasLoadStoreOnCond(false), HasHighWord(false), HasFPExtension(false),
41 HasFastSerialization(false), HasInterlockedAccess1(false),
42 TargetTriple(TT), InstrInfo(initializeSubtargetDependencies(CPU, FS)),
43 TLInfo(TM, *this), TSInfo(*TM.getDataLayout()), FrameLowering() {}
45 // Return true if GV binds locally under reloc model RM.
46 static bool bindsLocally(const GlobalValue *GV, Reloc::Model RM) {
47 // For non-PIC, all symbols bind locally.
48 if (RM == Reloc::Static)
51 return GV->hasLocalLinkage() || !GV->hasDefaultVisibility();
54 bool SystemZSubtarget::isPC32DBLSymbol(const GlobalValue *GV,
56 CodeModel::Model CM) const {
57 // PC32DBL accesses require the low bit to be clear. Note that a zero
58 // value selects the default alignment and is therefore OK.
59 if (GV->getAlignment() == 1)
62 // For the small model, all locally-binding symbols are in range.
63 if (CM == CodeModel::Small)
64 return bindsLocally(GV, RM);
66 // For Medium and above, assume that the symbol is not within the 4GB range.
67 // Taking the address of locally-defined text would be OK, but that
68 // case isn't easy to detect.