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), HasMessageSecurityAssist3(false),
41 HasMessageSecurityAssist4(false), HasResetReferenceBitsMultiple(false),
42 HasFastSerialization(false), HasInterlockedAccess1(false),
43 HasMiscellaneousExtensions(false),
44 HasExecutionHint(false), HasLoadAndTrap(false),
45 HasTransactionalExecution(false), HasProcessorAssist(false),
46 HasDFPZonedConversion(false), HasEnhancedDAT2(false),
47 HasVector(false), HasLoadStoreOnCond2(false),
48 HasLoadAndZeroRightmostByte(false), HasMessageSecurityAssist5(false),
49 HasDFPPackedConversion(false),
50 HasMiscellaneousExtensions2(false), HasGuardedStorage(false),
51 HasMessageSecurityAssist7(false), HasMessageSecurityAssist8(false),
52 HasVectorEnhancements1(false), HasVectorPackedDecimal(false),
53 HasInsertReferenceBitsMultiple(false),
54 TargetTriple(TT), InstrInfo(initializeSubtargetDependencies(CPU, FS)),
55 TLInfo(TM, *this), TSInfo(), FrameLowering() {}
56
isPC32DBLSymbol(const GlobalValue * GV,CodeModel::Model CM) const57 bool SystemZSubtarget::isPC32DBLSymbol(const GlobalValue *GV,
58 CodeModel::Model CM) const {
59 // PC32DBL accesses require the low bit to be clear. Note that a zero
60 // value selects the default alignment and is therefore OK.
61 if (GV->getAlignment() == 1)
62 return false;
63
64 // For the small model, all locally-binding symbols are in range.
65 if (CM == CodeModel::Small)
66 return TLInfo.getTargetMachine().shouldAssumeDSOLocal(*GV->getParent(), GV);
67
68 // For Medium and above, assume that the symbol is not within the 4GB range.
69 // Taking the address of locally-defined text would be OK, but that
70 // case isn't easy to detect.
71 return false;
72 }
73