1 //===-- SystemZSubtarget.cpp - SystemZ subtarget information --------------===//
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 #include "SystemZSubtarget.h"
11 #include "MCTargetDesc/SystemZMCTargetDesc.h"
12 #include "llvm/IR/GlobalValue.h"
13
14 using namespace llvm;
15
16 #define DEBUG_TYPE "systemz-subtarget"
17
18 #define GET_SUBTARGETINFO_TARGET_DESC
19 #define GET_SUBTARGETINFO_CTOR
20 #include "SystemZGenSubtargetInfo.inc"
21
22 // Pin the vtable to this file.
anchor()23 void SystemZSubtarget::anchor() {}
24
25 SystemZSubtarget &
initializeSubtargetDependencies(StringRef CPU,StringRef FS)26 SystemZSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) {
27 std::string CPUName = CPU;
28 if (CPUName.empty())
29 CPUName = "generic";
30 // Parse features string.
31 ParseSubtargetFeatures(CPUName, FS);
32 return *this;
33 }
34
SystemZSubtarget(const Triple & TT,const std::string & CPU,const std::string & FS,const TargetMachine & TM)35 SystemZSubtarget::SystemZSubtarget(const Triple &TT, const std::string &CPU,
36 const std::string &FS,
37 const TargetMachine &TM)
38 : SystemZGenSubtargetInfo(TT, CPU, FS), HasDistinctOps(false),
39 HasLoadStoreOnCond(false), HasHighWord(false), HasFPExtension(false),
40 HasPopulationCount(false), HasFastSerialization(false),
41 HasInterlockedAccess1(false), HasMiscellaneousExtensions(false),
42 HasTransactionalExecution(false), HasProcessorAssist(false),
43 HasVector(false), HasLoadStoreOnCond2(false), TargetTriple(TT),
44 InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
45 TSInfo(), FrameLowering() {}
46
isPC32DBLSymbol(const GlobalValue * GV,CodeModel::Model CM) const47 bool SystemZSubtarget::isPC32DBLSymbol(const GlobalValue *GV,
48 CodeModel::Model CM) const {
49 // PC32DBL accesses require the low bit to be clear. Note that a zero
50 // value selects the default alignment and is therefore OK.
51 if (GV->getAlignment() == 1)
52 return false;
53
54 // For the small model, all locally-binding symbols are in range.
55 if (CM == CodeModel::Small)
56 return TLInfo.getTargetMachine().shouldAssumeDSOLocal(*GV->getParent(), GV);
57
58 // For Medium and above, assume that the symbol is not within the 4GB range.
59 // Taking the address of locally-defined text would be OK, but that
60 // case isn't easy to detect.
61 return false;
62 }
63