LLVM  14.0.0git
HexagonTargetObjectFile.cpp
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1 //===-- HexagonTargetObjectFile.cpp ---------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file contains the declarations of the HexagonTargetAsmInfo properties.
10 //
11 //===----------------------------------------------------------------------===//
12 
14 #include "llvm/ADT/SmallString.h"
15 #include "llvm/ADT/StringRef.h"
16 #include "llvm/ADT/Twine.h"
17 #include "llvm/BinaryFormat/ELF.h"
18 #include "llvm/IR/DataLayout.h"
19 #include "llvm/IR/DerivedTypes.h"
20 #include "llvm/IR/GlobalObject.h"
21 #include "llvm/IR/GlobalValue.h"
22 #include "llvm/IR/GlobalVariable.h"
23 #include "llvm/IR/Module.h"
24 #include "llvm/IR/Type.h"
25 #include "llvm/MC/MCContext.h"
26 #include "llvm/MC/SectionKind.h"
27 #include "llvm/Support/Casting.h"
29 #include "llvm/Support/Debug.h"
32 
33 #define DEBUG_TYPE "hexagon-sdata"
34 
35 using namespace llvm;
36 
37 static cl::opt<unsigned> SmallDataThreshold("hexagon-small-data-threshold",
38  cl::init(8), cl::Hidden,
39  cl::desc("The maximum size of an object in the sdata section"));
40 
41 static cl::opt<bool> NoSmallDataSorting("mno-sort-sda", cl::init(false),
42  cl::Hidden, cl::desc("Disable small data sections sorting"));
43 
44 static cl::opt<bool> StaticsInSData("hexagon-statics-in-small-data",
46  cl::desc("Allow static variables in .sdata"));
47 
48 static cl::opt<bool> TraceGVPlacement("trace-gv-placement",
49  cl::Hidden, cl::init(false),
50  cl::desc("Trace global value placement"));
51 
52 static cl::opt<bool>
53  EmitJtInText("hexagon-emit-jt-text", cl::Hidden, cl::init(false),
54  cl::desc("Emit hexagon jump tables in function section"));
55 
56 static cl::opt<bool>
57  EmitLutInText("hexagon-emit-lut-text", cl::Hidden, cl::init(false),
58  cl::desc("Emit hexagon lookup tables in function section"));
59 
60 // TraceGVPlacement controls messages for all builds. For builds with assertions
61 // (debug or release), messages are also controlled by the usual debug flags
62 // (e.g. -debug and -debug-only=globallayout)
63 #define TRACE_TO(s, X) s << X
64 #ifdef NDEBUG
65 #define TRACE(X) \
66  do { \
67  if (TraceGVPlacement) { \
68  TRACE_TO(errs(), X); \
69  } \
70  } while (false)
71 #else
72 #define TRACE(X) \
73  do { \
74  if (TraceGVPlacement) { \
75  TRACE_TO(errs(), X); \
76  } else { \
77  LLVM_DEBUG(TRACE_TO(dbgs(), X)); \
78  } \
79  } while (false)
80 #endif
81 
82 // Returns true if the section name is such that the symbol will be put
83 // in a small data section.
84 // For instance, global variables with section attributes such as ".sdata"
85 // ".sdata.*", ".sbss", and ".sbss.*" will go into small data.
86 static bool isSmallDataSection(StringRef Sec) {
87  // sectionName is either ".sdata" or ".sbss". Looking for an exact match
88  // obviates the need for checks for section names such as ".sdatafoo".
89  if (Sec.equals(".sdata") || Sec.equals(".sbss") || Sec.equals(".scommon"))
90  return true;
91  // If either ".sdata." or ".sbss." is a substring of the section name
92  // then put the symbol in small data.
93  return Sec.find(".sdata.") != StringRef::npos ||
94  Sec.find(".sbss.") != StringRef::npos ||
95  Sec.find(".scommon.") != StringRef::npos;
96 }
97 
98 static const char *getSectionSuffixForSize(unsigned Size) {
99  switch (Size) {
100  default:
101  return "";
102  case 1:
103  return ".1";
104  case 2:
105  return ".2";
106  case 4:
107  return ".4";
108  case 8:
109  return ".8";
110  }
111 }
112 
114  const TargetMachine &TM) {
116 
117  SmallDataSection =
121  SmallBSSSection =
125 }
126 
128  const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const {
129  TRACE("[SelectSectionForGlobal] GO(" << GO->getName() << ") ");
130  TRACE("input section(" << GO->getSection() << ") ");
131 
132  TRACE((GO->hasPrivateLinkage() ? "private_linkage " : "")
133  << (GO->hasLocalLinkage() ? "local_linkage " : "")
134  << (GO->hasInternalLinkage() ? "internal " : "")
135  << (GO->hasExternalLinkage() ? "external " : "")
136  << (GO->hasCommonLinkage() ? "common_linkage " : "")
137  << (GO->hasCommonLinkage() ? "common " : "" )
138  << (Kind.isCommon() ? "kind_common " : "" )
139  << (Kind.isBSS() ? "kind_bss " : "" )
140  << (Kind.isBSSLocal() ? "kind_bss_local " : "" ));
141 
142  // If the lookup table is used by more than one function, do not place
143  // it in text section.
144  if (EmitLutInText && GO->getName().startswith("switch.table")) {
145  if (const Function *Fn = getLutUsedFunction(GO))
146  return selectSectionForLookupTable(GO, TM, Fn);
147  }
148 
149  if (isGlobalInSmallSection(GO, TM))
150  return selectSmallSectionForGlobal(GO, Kind, TM);
151 
152  if (Kind.isCommon()) {
153  // This is purely for LTO+Linker Script because commons don't really have a
154  // section. However, the BitcodeSectionWriter pass will query for the
155  // sections of commons (and the linker expects us to know their section) so
156  // we'll return one here.
157  return BSSSection;
158  }
159 
160  TRACE("default_ELF_section\n");
161  // Otherwise, we work the same as ELF.
163 }
164 
166  const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const {
167  TRACE("[getExplicitSectionGlobal] GO(" << GO->getName() << ") from("
168  << GO->getSection() << ") ");
169  TRACE((GO->hasPrivateLinkage() ? "private_linkage " : "")
170  << (GO->hasLocalLinkage() ? "local_linkage " : "")
171  << (GO->hasInternalLinkage() ? "internal " : "")
172  << (GO->hasExternalLinkage() ? "external " : "")
173  << (GO->hasCommonLinkage() ? "common_linkage " : "")
174  << (GO->hasCommonLinkage() ? "common " : "" )
175  << (Kind.isCommon() ? "kind_common " : "" )
176  << (Kind.isBSS() ? "kind_bss " : "" )
177  << (Kind.isBSSLocal() ? "kind_bss_local " : "" ));
178 
179  if (GO->hasSection()) {
180  StringRef Section = GO->getSection();
181  if (Section.find(".access.text.group") != StringRef::npos)
184  if (Section.find(".access.data.group") != StringRef::npos)
187  }
188 
189  if (isGlobalInSmallSection(GO, TM))
190  return selectSmallSectionForGlobal(GO, Kind, TM);
191 
192  // Otherwise, we work the same as ELF.
193  TRACE("default_ELF_section\n");
195 }
196 
197 /// Return true if this global value should be placed into small data/bss
198 /// section.
200  const TargetMachine &TM) const {
201  bool HaveSData = isSmallDataEnabled(TM);
202  if (!HaveSData)
203  LLVM_DEBUG(dbgs() << "Small-data allocation is disabled, but symbols "
204  "may have explicit section assignments...\n");
205  // Only global variables, not functions.
206  LLVM_DEBUG(dbgs() << "Checking if value is in small-data, -G"
207  << SmallDataThreshold << ": \"" << GO->getName() << "\": ");
208  const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GO);
209  if (!GVar) {
210  LLVM_DEBUG(dbgs() << "no, not a global variable\n");
211  return false;
212  }
213 
214  // Globals with external linkage that have an original section set must be
215  // emitted to that section, regardless of whether we would put them into
216  // small data or not. This is how we can support mixing -G0/-G8 in LTO.
217  if (GVar->hasSection()) {
218  bool IsSmall = isSmallDataSection(GVar->getSection());
219  LLVM_DEBUG(dbgs() << (IsSmall ? "yes" : "no")
220  << ", has section: " << GVar->getSection() << '\n');
221  return IsSmall;
222  }
223 
224  // If sdata is disabled, stop the checks here.
225  if (!HaveSData) {
226  LLVM_DEBUG(dbgs() << "no, small-data allocation is disabled\n");
227  return false;
228  }
229 
230  if (GVar->isConstant()) {
231  LLVM_DEBUG(dbgs() << "no, is a constant\n");
232  return false;
233  }
234 
235  bool IsLocal = GVar->hasLocalLinkage();
236  if (!StaticsInSData && IsLocal) {
237  LLVM_DEBUG(dbgs() << "no, is static\n");
238  return false;
239  }
240 
241  Type *GType = GVar->getValueType();
242  if (isa<ArrayType>(GType)) {
243  LLVM_DEBUG(dbgs() << "no, is an array\n");
244  return false;
245  }
246 
247  // If the type is a struct with no body provided, treat is conservatively.
248  // There cannot be actual definitions of object of such a type in this CU
249  // (only references), so assuming that they are not in sdata is safe. If
250  // these objects end up in the sdata, the references will still be valid.
251  if (StructType *ST = dyn_cast<StructType>(GType)) {
252  if (ST->isOpaque()) {
253  LLVM_DEBUG(dbgs() << "no, has opaque type\n");
254  return false;
255  }
256  }
257 
258  unsigned Size = GVar->getParent()->getDataLayout().getTypeAllocSize(GType);
259  if (Size == 0) {
260  LLVM_DEBUG(dbgs() << "no, has size 0\n");
261  return false;
262  }
263  if (Size > SmallDataThreshold) {
264  LLVM_DEBUG(dbgs() << "no, size exceeds sdata threshold: " << Size << '\n');
265  return false;
266  }
267 
268  LLVM_DEBUG(dbgs() << "yes\n");
269  return true;
270 }
271 
273  const {
275 }
276 
278  return SmallDataThreshold;
279 }
280 
282  bool UsesLabelDifference, const Function &F) const {
283  return EmitJtInText;
284 }
285 
286 /// Descends any type down to "elementary" components,
287 /// discovering the smallest addressable one.
288 /// If zero is returned, declaration will not be modified.
289 unsigned HexagonTargetObjectFile::getSmallestAddressableSize(const Type *Ty,
290  const GlobalValue *GV, const TargetMachine &TM) const {
291  // Assign the smallest element access size to the highest
292  // value which assembler can handle.
293  unsigned SmallestElement = 8;
294 
295  if (!Ty)
296  return 0;
297  switch (Ty->getTypeID()) {
298  case Type::StructTyID: {
299  const StructType *STy = cast<const StructType>(Ty);
300  for (auto &E : STy->elements()) {
301  unsigned AtomicSize = getSmallestAddressableSize(E, GV, TM);
302  if (AtomicSize < SmallestElement)
303  SmallestElement = AtomicSize;
304  }
305  return (STy->getNumElements() == 0) ? 0 : SmallestElement;
306  }
307  case Type::ArrayTyID: {
308  const ArrayType *ATy = cast<const ArrayType>(Ty);
309  return getSmallestAddressableSize(ATy->getElementType(), GV, TM);
310  }
313  const VectorType *PTy = cast<const VectorType>(Ty);
314  return getSmallestAddressableSize(PTy->getElementType(), GV, TM);
315  }
316  case Type::PointerTyID:
317  case Type::HalfTyID:
318  case Type::FloatTyID:
319  case Type::DoubleTyID:
320  case Type::IntegerTyID: {
321  const DataLayout &DL = GV->getParent()->getDataLayout();
322  // It is unfortunate that DL's function take non-const Type*.
323  return DL.getTypeAllocSize(const_cast<Type*>(Ty));
324  }
325  case Type::FunctionTyID:
326  case Type::VoidTyID:
327  case Type::BFloatTyID:
328  case Type::X86_FP80TyID:
329  case Type::FP128TyID:
330  case Type::PPC_FP128TyID:
331  case Type::LabelTyID:
332  case Type::MetadataTyID:
333  case Type::X86_MMXTyID:
334  case Type::X86_AMXTyID:
335  case Type::TokenTyID:
336  return 0;
337  }
338 
339  return 0;
340 }
341 
342 MCSection *HexagonTargetObjectFile::selectSmallSectionForGlobal(
343  const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const {
344  const Type *GTy = GO->getValueType();
345  unsigned Size = getSmallestAddressableSize(GTy, GO, TM);
346 
347  // If we have -ffunction-section or -fdata-section then we should emit the
348  // global value to a unique section specifically for it... even for sdata.
349  bool EmitUniquedSection = TM.getDataSections();
350 
351  TRACE("Small data. Size(" << Size << ")");
352  // Handle Small Section classification here.
353  if (Kind.isBSS() || Kind.isBSSLocal()) {
354  // If -mno-sort-sda is not set, find out smallest accessible entity in
355  // declaration and add it to the section name string.
356  // Note. It does not track the actual usage of the value, only its de-
357  // claration. Also, compiler adds explicit pad fields to some struct
358  // declarations - they are currently counted towards smallest addres-
359  // sable entity.
360  if (NoSmallDataSorting) {
361  TRACE(" default sbss\n");
362  return SmallBSSSection;
363  }
364 
365  StringRef Prefix(".sbss");
368 
369  if (EmitUniquedSection) {
370  Name.append(".");
371  Name.append(GO->getName());
372  }
373  TRACE(" unique sbss(" << Name << ")\n");
376  }
377 
378  if (Kind.isCommon()) {
379  // This is purely for LTO+Linker Script because commons don't really have a
380  // section. However, the BitcodeSectionWriter pass will query for the
381  // sections of commons (and the linker expects us to know their section) so
382  // we'll return one here.
383  if (NoSmallDataSorting)
384  return BSSSection;
385 
386  Twine Name = Twine(".scommon") + getSectionSuffixForSize(Size);
387  TRACE(" small COMMON (" << Name << ")\n");
388 
392  }
393 
394  // We could have changed sdata object to a constant... in this
395  // case the Kind could be wrong for it.
396  if (Kind.isMergeableConst()) {
397  TRACE(" const_object_as_data ");
398  const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GO);
399  if (GVar->hasSection() && isSmallDataSection(GVar->getSection()))
401  }
402 
403  if (Kind.isData()) {
404  if (NoSmallDataSorting) {
405  TRACE(" default sdata\n");
406  return SmallDataSection;
407  }
408 
409  StringRef Prefix(".sdata");
412 
413  if (EmitUniquedSection) {
414  Name.append(".");
415  Name.append(GO->getName());
416  }
417  TRACE(" unique sdata(" << Name << ")\n");
420  }
421 
422  TRACE("default ELF section\n");
423  // Otherwise, we work the same as ELF.
425 }
426 
427 // Return the function that uses the lookup table. If there are more
428 // than one live function that uses this look table, bail out and place
429 // the lookup table in default section.
430 const Function *
432  const Function *ReturnFn = nullptr;
433  for (auto U : GO->users()) {
434  // validate each instance of user to be a live function.
435  auto *I = dyn_cast<Instruction>(U);
436  if (!I)
437  continue;
438  auto *Bb = I->getParent();
439  if (!Bb)
440  continue;
441  auto *UserFn = Bb->getParent();
442  if (!ReturnFn)
443  ReturnFn = UserFn;
444  else if (ReturnFn != UserFn)
445  return nullptr;
446  }
447  return ReturnFn;
448 }
449 
450 MCSection *HexagonTargetObjectFile::selectSectionForLookupTable(
451  const GlobalObject *GO, const TargetMachine &TM, const Function *Fn) const {
452 
454  // If the function has explicit section, place the lookup table in this
455  // explicit section.
456  if (Fn->hasSection())
457  return getExplicitSectionGlobal(Fn, Kind, TM);
458 
459  const auto *FuncObj = dyn_cast<GlobalObject>(Fn);
460  return SelectSectionForGlobal(FuncObj, Kind, TM);
461 }
llvm::Check::Size
@ Size
Definition: FileCheck.h:73
llvm::Type::ArrayTyID
@ ArrayTyID
Arrays.
Definition: Type.h:75
llvm::StringRef::startswith
LLVM_NODISCARD bool startswith(StringRef Prefix) const
Check if this string starts with the given Prefix.
Definition: StringRef.h:286
llvm::Type::FloatTyID
@ FloatTyID
32-bit floating point type
Definition: Type.h:58
llvm::Type::DoubleTyID
@ DoubleTyID
64-bit floating point type
Definition: Type.h:59
llvm
---------------------— PointerInfo ------------------------------------—
Definition: AllocatorList.h:23
llvm::GlobalValue::hasCommonLinkage
bool hasCommonLinkage() const
Definition: GlobalValue.h:449
llvm::DataLayout
A parsed version of the target data layout string in and methods for querying it.
Definition: DataLayout.h:112
llvm::TargetLoweringObjectFileELF::SelectSectionForGlobal
MCSection * SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const override
Definition: TargetLoweringObjectFileImpl.cpp:874
llvm::GlobalValue::hasExternalLinkage
bool hasExternalLinkage() const
Definition: GlobalValue.h:431
llvm::cl::Prefix
@ Prefix
Definition: CommandLine.h:164
getSectionSuffixForSize
static const char * getSectionSuffixForSize(unsigned Size)
Definition: HexagonTargetObjectFile.cpp:98
llvm::MCContext
Context object for machine code objects.
Definition: MCContext.h:72
llvm::Function
Definition: Function.h:61
llvm::Type::VoidTyID
@ VoidTyID
type with no size
Definition: Type.h:63
StringRef.h
llvm::GlobalObject::getSection
StringRef getSection() const
Get the custom section of this global if it has one.
Definition: GlobalObject.h:112
llvm::TargetLoweringObjectFileELF::getExplicitSectionGlobal
MCSection * getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const override
Targets should implement this method to assign a section to globals with an explicit section specfied...
Definition: TargetLoweringObjectFileImpl.cpp:806
llvm::StringRef::npos
static constexpr size_t npos
Definition: StringRef.h:60
llvm::StringRef::find
LLVM_NODISCARD size_t find(char C, size_t From=0) const
Search for the first character C in the string.
Definition: StringRef.h:315
llvm::GlobalVariable
Definition: GlobalVariable.h:40
llvm::Type::X86_AMXTyID
@ X86_AMXTyID
AMX vectors (8192 bits, X86 specific)
Definition: Type.h:67
llvm::Type::getTypeID
TypeID getTypeID() const
Return the type id for the type.
Definition: Type.h:135
llvm::cl::Hidden
@ Hidden
Definition: CommandLine.h:143
llvm::Type
The instances of the Type class are immutable: once they are created, they are never changed.
Definition: Type.h:45
llvm::ELF::SHF_EXECINSTR
@ SHF_EXECINSTR
Definition: ELF.h:991
Module.h
llvm::HexagonTargetObjectFile::isGlobalInSmallSection
bool isGlobalInSmallSection(const GlobalObject *GO, const TargetMachine &TM) const
Return true if this global value should be placed into small data/bss section.
Definition: HexagonTargetObjectFile.cpp:199
EmitJtInText
static cl::opt< bool > EmitJtInText("hexagon-emit-jt-text", cl::Hidden, cl::init(false), cl::desc("Emit hexagon jump tables in function section"))
GlobalObject.h
llvm::VectorType::getElementType
Type * getElementType() const
Definition: DerivedTypes.h:422
llvm::ArrayType
Class to represent array types.
Definition: DerivedTypes.h:357
llvm::MCObjectFileInfo::getContext
MCContext & getContext() const
Definition: MCObjectFileInfo.h:235
LLVM_DEBUG
#define LLVM_DEBUG(X)
Definition: Debug.h:101
F
#define F(x, y, z)
Definition: MD5.cpp:56
TRACE
#define TRACE(X)
Definition: HexagonTargetObjectFile.cpp:72
llvm::ELF::SHT_PROGBITS
@ SHT_PROGBITS
Definition: ELF.h:910
llvm::dbgs
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:163
llvm::ARMBuildAttrs::Section
@ Section
Legacy Tags.
Definition: ARMBuildAttributes.h:78
CommandLine.h
llvm::Type::MetadataTyID
@ MetadataTyID
Metadata.
Definition: Type.h:65
NoSmallDataSorting
static cl::opt< bool > NoSmallDataSorting("mno-sort-sda", cl::init(false), cl::Hidden, cl::desc("Disable small data sections sorting"))
GlobalValue.h
ELF.h
llvm::Type::FunctionTyID
@ FunctionTyID
Functions.
Definition: Type.h:72
TargetMachine.h
SmallString.h
E
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
Twine.h
llvm::GlobalObject
Definition: GlobalObject.h:28
MCContext.h
llvm::GlobalValue::hasPrivateLinkage
bool hasPrivateLinkage() const
Definition: GlobalValue.h:444
llvm::MCContext::getELFSection
MCSectionELF * getELFSection(const Twine &Section, unsigned Type, unsigned Flags)
Definition: MCContext.h:540
llvm::HexagonTargetObjectFile::Initialize
void Initialize(MCContext &Ctx, const TargetMachine &TM) override
This method must be called before any actual lowering is done.
Definition: HexagonTargetObjectFile.cpp:113
llvm::HexagonTargetObjectFile::getSmallDataSize
unsigned getSmallDataSize() const
Definition: HexagonTargetObjectFile.cpp:277
llvm::GlobalValue::hasInternalLinkage
bool hasInternalLinkage() const
Definition: GlobalValue.h:443
llvm::Type::PointerTyID
@ PointerTyID
Pointers.
Definition: Type.h:73
llvm::SectionKind::getText
static SectionKind getText()
Definition: SectionKind.h:183
llvm::Type::BFloatTyID
@ BFloatTyID
16-bit floating point type (7-bit significand)
Definition: Type.h:57
llvm::lltok::Kind
Kind
Definition: LLToken.h:18
Type.h
isSmallDataSection
static bool isSmallDataSection(StringRef Sec)
Definition: HexagonTargetObjectFile.cpp:86
llvm::StringRef::equals
LLVM_NODISCARD bool equals(StringRef RHS) const
equals - Check for string equality, this is more efficient than compare() when the relative ordering ...
Definition: StringRef.h:187
llvm::SmallString< 128 >
llvm::TargetMachine::isPositionIndependent
bool isPositionIndependent() const
Definition: TargetMachine.cpp:44
llvm::HexagonTargetObjectFile::shouldPutJumpTableInFunctionSection
bool shouldPutJumpTableInFunctionSection(bool UsesLabelDifference, const Function &F) const override
Definition: HexagonTargetObjectFile.cpp:281
llvm::TargetLoweringObjectFile::TM
const TargetMachine * TM
Definition: TargetLoweringObjectFile.h:66
llvm::cl::ZeroOrMore
@ ZeroOrMore
Definition: CommandLine.h:120
llvm::VectorType
Base class of all SIMD vector types.
Definition: DerivedTypes.h:389
llvm::cl::opt
Definition: CommandLine.h:1434
llvm::GlobalObject::hasSection
bool hasSection() const
Check if this global has a custom object file section.
Definition: GlobalObject.h:104
llvm::GlobalValue
Definition: GlobalValue.h:44
llvm::GlobalValue::getParent
Module * getParent()
Get the module that this global value is contained inside of...
Definition: GlobalValue.h:572
llvm::Type::X86_MMXTyID
@ X86_MMXTyID
MMX vectors (64 bits, X86 specific)
Definition: Type.h:66
llvm::ARM_MB::ST
@ ST
Definition: ARMBaseInfo.h:73
llvm::ELF::SHF_WRITE
@ SHF_WRITE
Definition: ELF.h:985
I
#define I(x, y, z)
Definition: MD5.cpp:59
llvm::cl::init
initializer< Ty > init(const Ty &Val)
Definition: CommandLine.h:443
llvm::TargetMachine
Primary interface to the complete machine description for the target machine.
Definition: TargetMachine.h:79
llvm::GlobalValue::hasLocalLinkage
bool hasLocalLinkage() const
Definition: GlobalValue.h:445
llvm::ELF::SHF_HEX_GPREL
@ SHF_HEX_GPREL
Definition: ELF.h:1052
llvm::Type::FP128TyID
@ FP128TyID
128-bit floating point type (112-bit significand)
Definition: Type.h:61
TraceGVPlacement
static cl::opt< bool > TraceGVPlacement("trace-gv-placement", cl::Hidden, cl::init(false), cl::desc("Trace global value placement"))
llvm::ELF::SHF_ALLOC
@ SHF_ALLOC
Definition: ELF.h:988
DataLayout.h
llvm::StructType
Class to represent struct types.
Definition: DerivedTypes.h:213
llvm::Type::PPC_FP128TyID
@ PPC_FP128TyID
128-bit floating point type (two 64-bits, PowerPC)
Definition: Type.h:62
llvm::StringRef
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:58
DL
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
Definition: AArch64SLSHardening.cpp:76
EmitLutInText
static cl::opt< bool > EmitLutInText("hexagon-emit-lut-text", cl::Hidden, cl::init(false), cl::desc("Emit hexagon lookup tables in function section"))
llvm::MCSection
Instances of this class represent a uniqued identifier for a section in the current translation unit.
Definition: MCSection.h:39
HexagonTargetObjectFile.h
llvm::Value::getName
StringRef getName() const
Return a constant reference to the value's name.
Definition: Value.cpp:297
SmallDataThreshold
static cl::opt< unsigned > SmallDataThreshold("hexagon-small-data-threshold", cl::init(8), cl::Hidden, cl::desc("The maximum size of an object in the sdata section"))
llvm::StructType::getNumElements
unsigned getNumElements() const
Random access to the elements.
Definition: DerivedTypes.h:327
llvm::HexagonTargetObjectFile::getExplicitSectionGlobal
MCSection * getExplicitSectionGlobal(const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const override
Targets should implement this method to assign a section to globals with an explicit section specfied...
Definition: HexagonTargetObjectFile.cpp:165
llvm::Type::IntegerTyID
@ IntegerTyID
Arbitrary bit width integers.
Definition: Type.h:71
llvm::SectionKind::getData
static SectionKind getData()
Definition: SectionKind.h:206
llvm::Twine
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:83
llvm::HexagonTargetObjectFile::isSmallDataEnabled
bool isSmallDataEnabled(const TargetMachine &TM) const
Definition: HexagonTargetObjectFile.cpp:272
llvm::SectionKind
SectionKind - This is a simple POD value that classifies the properties of a section.
Definition: SectionKind.h:22
llvm::GraphProgram::Name
Name
Definition: GraphWriter.h:52
StaticsInSData
static cl::opt< bool > StaticsInSData("hexagon-statics-in-small-data", cl::init(false), cl::Hidden, cl::ZeroOrMore, cl::desc("Allow static variables in .sdata"))
llvm::StructType::elements
ArrayRef< Type * > elements() const
Definition: DerivedTypes.h:319
llvm::Type::FixedVectorTyID
@ FixedVectorTyID
Fixed width SIMD vector type.
Definition: Type.h:76
GlobalVariable.h
Casting.h
llvm::Type::TokenTyID
@ TokenTyID
Tokens.
Definition: Type.h:68
llvm::TargetLoweringObjectFileELF::Initialize
void Initialize(MCContext &Ctx, const TargetMachine &TM) override
This method must be called before any actual lowering is done.
Definition: TargetLoweringObjectFileImpl.cpp:116
SectionKind.h
llvm::Type::LabelTyID
@ LabelTyID
Labels.
Definition: Type.h:64
llvm::Type::StructTyID
@ StructTyID
Structures.
Definition: Type.h:74
llvm::HexagonTargetObjectFile::getLutUsedFunction
const Function * getLutUsedFunction(const GlobalObject *GO) const
Definition: HexagonTargetObjectFile.cpp:431
llvm::GlobalVariable::isConstant
bool isConstant() const
If the value is a global constant, its value is immutable throughout the runtime execution of the pro...
Definition: GlobalVariable.h:153
llvm::MCObjectFileInfo::BSSSection
MCSection * BSSSection
Section that is default initialized to zero.
Definition: MCObjectFileInfo.h:61
llvm::Type::ScalableVectorTyID
@ ScalableVectorTyID
Scalable SIMD vector type.
Definition: Type.h:77
llvm::Module::getDataLayout
const DataLayout & getDataLayout() const
Get the data layout for the module's target platform.
Definition: Module.cpp:401
DerivedTypes.h
llvm::GlobalValue::getValueType
Type * getValueType() const
Definition: GlobalValue.h:273
TM
const char LLVMTargetMachineRef TM
Definition: PassBuilderBindings.cpp:47
llvm::HexagonTargetObjectFile::SelectSectionForGlobal
MCSection * SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const override
Definition: HexagonTargetObjectFile.cpp:127
llvm::cl::desc
Definition: CommandLine.h:414
raw_ostream.h
llvm::ELF::SHT_NOBITS
@ SHT_NOBITS
Definition: ELF.h:917
Debug.h
llvm::Type::HalfTyID
@ HalfTyID
16-bit floating point type
Definition: Type.h:56
llvm::Value::users
iterator_range< user_iterator > users()
Definition: Value.h:422
llvm::Type::X86_FP80TyID
@ X86_FP80TyID
80-bit floating point type (X87)
Definition: Type.h:60
llvm::ArrayType::getElementType
Type * getElementType() const
Definition: DerivedTypes.h:370
llvm::TargetMachine::getDataSections
bool getDataSections() const
Return true if data objects should be emitted into their own section, corresponds to -fdata-sections.
Definition: TargetMachine.h:275
llvm::DataLayout::getTypeAllocSize
TypeSize getTypeAllocSize(Type *Ty) const
Returns the offset in bytes between successive objects of the specified type, including alignment pad...
Definition: DataLayout.h:498