LLVM  12.0.0git
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 
13 #define DEBUG_TYPE "hexagon-sdata"
14 
16 #include "llvm/ADT/SmallString.h"
17 #include "llvm/ADT/StringRef.h"
18 #include "llvm/ADT/Twine.h"
19 #include "llvm/BinaryFormat/ELF.h"
20 #include "llvm/IR/DataLayout.h"
21 #include "llvm/IR/DerivedTypes.h"
22 #include "llvm/IR/GlobalObject.h"
23 #include "llvm/IR/GlobalValue.h"
24 #include "llvm/IR/GlobalVariable.h"
25 #include "llvm/IR/Module.h"
26 #include "llvm/IR/Type.h"
27 #include "llvm/MC/MCContext.h"
28 #include "llvm/MC/SectionKind.h"
29 #include "llvm/Support/Casting.h"
31 #include "llvm/Support/Debug.h"
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 {
274  return SmallDataThreshold > 0 && !TM.isPositionIndependent();
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::TokenTyID:
335  return 0;
336  }
337 
338  return 0;
339 }
340 
341 MCSection *HexagonTargetObjectFile::selectSmallSectionForGlobal(
342  const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const {
343  const Type *GTy = GO->getValueType();
344  unsigned Size = getSmallestAddressableSize(GTy, GO, TM);
345 
346  // If we have -ffunction-section or -fdata-section then we should emit the
347  // global value to a unique section specifically for it... even for sdata.
348  bool EmitUniquedSection = TM.getDataSections();
349 
350  TRACE("Small data. Size(" << Size << ")");
351  // Handle Small Section classification here.
352  if (Kind.isBSS() || Kind.isBSSLocal()) {
353  // If -mno-sort-sda is not set, find out smallest accessible entity in
354  // declaration and add it to the section name string.
355  // Note. It does not track the actual usage of the value, only its de-
356  // claration. Also, compiler adds explicit pad fields to some struct
357  // declarations - they are currently counted towards smallest addres-
358  // sable entity.
359  if (NoSmallDataSorting) {
360  TRACE(" default sbss\n");
361  return SmallBSSSection;
362  }
363 
364  StringRef Prefix(".sbss");
365  SmallString<128> Name(Prefix);
366  Name.append(getSectionSuffixForSize(Size));
367 
368  if (EmitUniquedSection) {
369  Name.append(".");
370  Name.append(GO->getName());
371  }
372  TRACE(" unique sbss(" << Name << ")\n");
373  return getContext().getELFSection(Name.str(), ELF::SHT_NOBITS,
375  }
376 
377  if (Kind.isCommon()) {
378  // This is purely for LTO+Linker Script because commons don't really have a
379  // section. However, the BitcodeSectionWriter pass will query for the
380  // sections of commons (and the linker expects us to know their section) so
381  // we'll return one here.
382  if (NoSmallDataSorting)
383  return BSSSection;
384 
385  Twine Name = Twine(".scommon") + getSectionSuffixForSize(Size);
386  TRACE(" small COMMON (" << Name << ")\n");
387 
388  return getContext().getELFSection(Name.str(), ELF::SHT_NOBITS,
391  }
392 
393  // We could have changed sdata object to a constant... in this
394  // case the Kind could be wrong for it.
395  if (Kind.isMergeableConst()) {
396  TRACE(" const_object_as_data ");
397  const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GO);
398  if (GVar->hasSection() && isSmallDataSection(GVar->getSection()))
399  Kind = SectionKind::getData();
400  }
401 
402  if (Kind.isData()) {
403  if (NoSmallDataSorting) {
404  TRACE(" default sdata\n");
405  return SmallDataSection;
406  }
407 
408  StringRef Prefix(".sdata");
409  SmallString<128> Name(Prefix);
410  Name.append(getSectionSuffixForSize(Size));
411 
412  if (EmitUniquedSection) {
413  Name.append(".");
414  Name.append(GO->getName());
415  }
416  TRACE(" unique sdata(" << Name << ")\n");
419  }
420 
421  TRACE("default ELF section\n");
422  // Otherwise, we work the same as ELF.
424 }
425 
426 // Return the function that uses the lookup table. If there are more
427 // than one live function that uses this look table, bail out and place
428 // the lookup table in default section.
429 const Function *
431  const Function *ReturnFn = nullptr;
432  for (auto U : GO->users()) {
433  // validate each instance of user to be a live function.
434  auto *I = dyn_cast<Instruction>(U);
435  if (!I)
436  continue;
437  auto *Bb = I->getParent();
438  if (!Bb)
439  continue;
440  auto *UserFn = Bb->getParent();
441  if (!ReturnFn)
442  ReturnFn = UserFn;
443  else if (ReturnFn != UserFn)
444  return nullptr;
445  }
446  return ReturnFn;
447 }
448 
449 MCSection *HexagonTargetObjectFile::selectSectionForLookupTable(
450  const GlobalObject *GO, const TargetMachine &TM, const Function *Fn) const {
451 
453  // If the function has explicit section, place the lookup table in this
454  // explicit section.
455  if (Fn->hasSection())
456  return getExplicitSectionGlobal(Fn, Kind, TM);
457 
458  const auto *FuncObj = dyn_cast<GlobalObject>(Fn);
459  return SelectSectionForGlobal(FuncObj, Kind, TM);
460 }
bool isGlobalInSmallSection(const GlobalObject *GO, const TargetMachine &TM) const
Return true if this global value should be placed into small data/bss section.
StringRef getSection() const
Get the custom section of this global if it has one.
Definition: GlobalObject.h:115
Instances of this class represent a uniqued identifier for a section in the current translation unit...
Definition: MCSection.h:39
Labels.
Definition: Type.h:65
A parsed version of the target data layout string in and methods for querying it. ...
Definition: DataLayout.h:111
static SectionKind getData()
Definition: SectionKind.h:201
LLVM_NODISCARD std::enable_if_t< !is_simple_type< Y >::value, typename cast_retty< X, const Y >::ret_type > dyn_cast(const Y &Val)
Definition: Casting.h:334
bool hasLocalLinkage() const
Definition: GlobalValue.h:445
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...
bool hasPrivateLinkage() const
Definition: GlobalValue.h:444
This class represents lattice values for constants.
Definition: AllocatorList.h:23
32-bit floating point type
Definition: Type.h:59
amdgpu Simplify well known AMD library false FunctionCallee Value const Twine & Name
ArrayRef< Type * > const elements() const
Definition: DerivedTypes.h:320
LLVM_NODISCARD bool startswith(StringRef Prefix) const
Check if this string starts with the given Prefix.
Definition: StringRef.h:289
unsigned getNumElements() const
Random access to the elements.
Definition: DerivedTypes.h:328
static const char * getSectionSuffixForSize(unsigned Size)
Structures.
Definition: Type.h:74
F(f)
80-bit floating point type (X87)
Definition: Type.h:61
16-bit floating point type
Definition: Type.h:57
Pointers.
Definition: Type.h:73
Functions.
Definition: Type.h:72
MCContext & getContext() const
#define TRACE(X)
static cl::opt< bool > EmitJtInText("hexagon-emit-jt-text", cl::Hidden, cl::init(false), cl::desc("Emit hexagon jump tables in function section"))
Scalable SIMD vector type.
Definition: Type.h:77
static cl::opt< bool > NoSmallDataSorting("mno-sort-sda", cl::init(false), cl::Hidden, cl::desc("Disable small data sections sorting"))
const DataLayout & getDataLayout() const
Get the data layout for the module&#39;s target platform.
Definition: Module.cpp:397
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:80
TypeID getTypeID() const
Return the type id for the type.
Definition: Type.h:135
16-bit floating point type (7-bit significand)
Definition: Type.h:58
Class to represent struct types.
Definition: DerivedTypes.h:218
Fixed width SIMD vector type.
Definition: Type.h:76
static constexpr size_t npos
Definition: StringRef.h:59
bool hasCommonLinkage() const
Definition: GlobalValue.h:449
MCSection * SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const override
StringRef str() const
Explicit conversion to StringRef.
Definition: SmallString.h:266
Context object for machine code objects.
Definition: MCContext.h:67
bool hasExternalLinkage() const
Definition: GlobalValue.h:431
Class to represent array types.
Definition: DerivedTypes.h:358
bool isBSSLocal() const
Definition: SectionKind.h:160
bool shouldPutJumpTableInFunctionSection(bool UsesLabelDifference, const Function &F) const override
bool getDataSections() const
Return true if data objects should be emitted into their own section, corresponds to -fdata-sections...
void append(in_iter S, in_iter E)
Append from an iterator pair.
Definition: SmallString.h:74
Arbitrary bit width integers.
Definition: Type.h:71
type with no size
Definition: Type.h:64
initializer< Ty > init(const Ty &Val)
Definition: CommandLine.h:434
const Function * getLutUsedFunction(const GlobalObject *GO) const
MCSection * SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const override
The instances of the Type class are immutable: once they are created, they are never changed...
Definition: Type.h:46
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
Tokens.
Definition: Type.h:68
TypeSize getTypeAllocSize(Type *Ty) const
Returns the offset in bytes between successive objects of the specified type, including alignment pad...
Definition: DataLayout.h:490
static bool isSmallDataSection(StringRef Sec)
Type * getElementType() const
Definition: DerivedTypes.h:442
LLVM_NODISCARD size_t find(char C, size_t From=0) const
Search for the first character C in the string.
Definition: StringRef.h:318
bool hasInternalLinkage() const
Definition: GlobalValue.h:443
SectionKind - This is a simple POD value that classifies the properties of a section.
Definition: SectionKind.h:22
128-bit floating point type (two 64-bits, PowerPC)
Definition: Type.h:63
bool isBSS() const
Definition: SectionKind.h:159
Arrays.
Definition: Type.h:75
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"))
void Initialize(MCContext &Ctx, const TargetMachine &TM) override
This method must be called before any actual lowering is done.
bool hasSection() const
Check if this global has a custom object file section.
Definition: GlobalObject.h:107
bool isCommon() const
Definition: SectionKind.h:163
Module.h This file contains the declarations for the Module class.
static cl::opt< bool > TraceGVPlacement("trace-gv-placement", cl::Hidden, cl::init(false), cl::desc("Trace global value placement"))
static cl::opt< bool > StaticsInSData("hexagon-statics-in-small-data", cl::init(false), cl::Hidden, cl::ZeroOrMore, cl::desc("Allow static variables in .sdata"))
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:132
Metadata.
Definition: Type.h:66
Base class of all SIMD vector types.
Definition: DerivedTypes.h:390
iterator_range< user_iterator > users()
Definition: Value.h:418
static cl::opt< bool > EmitLutInText("hexagon-emit-lut-text", cl::Hidden, cl::init(false), cl::desc("Emit hexagon lookup tables in function section"))
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:190
bool isMergeableConst() const
Definition: SectionKind.h:135
bool isPositionIndependent() const
StringRef getName() const
Return a constant reference to the value&#39;s name.
Definition: Value.cpp:270
#define I(x, y, z)
Definition: MD5.cpp:59
Type * getValueType() const
Definition: GlobalValue.h:273
uint32_t Size
Definition: Profile.cpp:46
std::string str() const
Return the twine contents as a std::string.
Definition: Twine.cpp:17
64-bit floating point type
Definition: Type.h:60
MCSectionELF * getELFSection(const Twine &Section, unsigned Type, unsigned Flags)
Definition: MCContext.h:469
Module * getParent()
Get the module that this global value is contained inside of...
Definition: GlobalValue.h:572
bool isData() const
Definition: SectionKind.h:165
Primary interface to the complete machine description for the target machine.
Definition: TargetMachine.h:65
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...
MCSection * BSSSection
Section that is default initialized to zero.
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:57
MMX vectors (64 bits, X86 specific)
Definition: Type.h:67
void Initialize(MCContext &Ctx, const TargetMachine &TM) override
This method must be called before any actual lowering is done.
#define LLVM_DEBUG(X)
Definition: Debug.h:122
Type * getElementType() const
Definition: DerivedTypes.h:371
128-bit floating point type (112-bit significand)
Definition: Type.h:62
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
static SectionKind getText()
Definition: SectionKind.h:179
bool isSmallDataEnabled(const TargetMachine &TM) const