LLVM  9.0.0svn
WebAssemblyTargetMachine.cpp
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1 //===- WebAssemblyTargetMachine.cpp - Define TargetMachine for WebAssembly -==//
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 /// \file
10 /// This file defines the WebAssembly-specific subclass of TargetMachine.
11 ///
12 //===----------------------------------------------------------------------===//
13 
16 #include "WebAssembly.h"
22 #include "llvm/CodeGen/Passes.h"
25 #include "llvm/IR/Function.h"
28 #include "llvm/Transforms/Scalar.h"
30 #include "llvm/Transforms/Utils.h"
31 using namespace llvm;
32 
33 #define DEBUG_TYPE "wasm"
34 
35 // Emscripten's asm.js-style exception handling
37  "enable-emscripten-cxx-exceptions",
38  cl::desc("WebAssembly Emscripten-style exception handling"),
39  cl::init(false));
40 
41 // Emscripten's asm.js-style setjmp/longjmp handling
43  "enable-emscripten-sjlj",
44  cl::desc("WebAssembly Emscripten-style setjmp/longjmp handling"),
45  cl::init(false));
46 
48  // Register the target.
53 
54  // Register backend passes
55  auto &PR = *PassRegistry::getPassRegistry();
79 }
80 
81 //===----------------------------------------------------------------------===//
82 // WebAssembly Lowering public interface.
83 //===----------------------------------------------------------------------===//
84 
86  if (!RM.hasValue()) {
87  // Default to static relocation model. This should always be more optimial
88  // than PIC since the static linker can determine all global addresses and
89  // assume direct function calls.
90  return Reloc::Static;
91  }
92  return *RM;
93 }
94 
95 /// Create an WebAssembly architecture model.
96 ///
98  const Target &T, const Triple &TT, StringRef CPU, StringRef FS,
99  const TargetOptions &Options, Optional<Reloc::Model> RM,
101  : LLVMTargetMachine(T,
102  TT.isArch64Bit() ? "e-m:e-p:64:64-i64:64-n32:64-S128"
103  : "e-m:e-p:32:32-i64:64-n32:64-S128",
104  TT, CPU, FS, Options, getEffectiveRelocModel(RM),
105  getEffectiveCodeModel(CM, CodeModel::Large), OL),
106  TLOF(new WebAssemblyTargetObjectFile()) {
107  // WebAssembly type-checks instructions, but a noreturn function with a return
108  // type that doesn't match the context will cause a check failure. So we lower
109  // LLVM 'unreachable' to ISD::TRAP and then lower that to WebAssembly's
110  // 'unreachable' instructions which is meant for that case.
111  this->Options.TrapUnreachable = true;
112 
113  // WebAssembly treats each function as an independent unit. Force
114  // -ffunction-sections, effectively, so that we can emit them independently.
115  this->Options.FunctionSections = true;
116  this->Options.DataSections = true;
117  this->Options.UniqueSectionNames = true;
118 
119  initAsmInfo();
120 
121  // Note that we don't use setRequiresStructuredCFG(true). It disables
122  // optimizations than we're ok with, and want, such as critical edge
123  // splitting and tail merging.
124 }
125 
127 
128 const WebAssemblySubtarget *
130  std::string FS) const {
131  auto &I = SubtargetMap[CPU + FS];
132  if (!I) {
133  I = llvm::make_unique<WebAssemblySubtarget>(TargetTriple, CPU, FS, *this);
134  }
135  return I.get();
136 }
137 
138 const WebAssemblySubtarget *
140  Attribute CPUAttr = F.getFnAttribute("target-cpu");
141  Attribute FSAttr = F.getFnAttribute("target-features");
142 
143  std::string CPU = !CPUAttr.hasAttribute(Attribute::None)
144  ? CPUAttr.getValueAsString().str()
145  : TargetCPU;
146  std::string FS = !FSAttr.hasAttribute(Attribute::None)
147  ? FSAttr.getValueAsString().str()
148  : TargetFS;
149 
150  // This needs to be done before we create a new subtarget since any
151  // creation will depend on the TM and the code generation flags on the
152  // function that reside in TargetOptions.
154 
155  return getSubtargetImpl(CPU, FS);
156 }
157 
158 namespace {
159 
160 class CoalesceFeaturesAndStripAtomics final : public ModulePass {
161  // Take the union of all features used in the module and use it for each
162  // function individually, since having multiple feature sets in one module
163  // currently does not make sense for WebAssembly. If atomics are not enabled,
164  // also strip atomic operations and thread local storage.
165  static char ID;
166  WebAssemblyTargetMachine *WasmTM;
167 
168 public:
169  CoalesceFeaturesAndStripAtomics(WebAssemblyTargetMachine *WasmTM)
170  : ModulePass(ID), WasmTM(WasmTM) {}
171 
172  bool runOnModule(Module &M) override {
173  FeatureBitset Features = coalesceFeatures(M);
174 
175  std::string FeatureStr = getFeatureString(Features);
176  for (auto &F : M)
177  replaceFeatures(F, FeatureStr);
178 
179  bool Stripped = false;
180  if (!Features[WebAssembly::FeatureAtomics]) {
181  Stripped |= stripAtomics(M);
182  Stripped |= stripThreadLocals(M);
183  }
184 
185  recordFeatures(M, Features, Stripped);
186 
187  // Conservatively assume we have made some change
188  return true;
189  }
190 
191 private:
192  FeatureBitset coalesceFeatures(const Module &M) {
193  FeatureBitset Features =
194  WasmTM
195  ->getSubtargetImpl(WasmTM->getTargetCPU(),
196  WasmTM->getTargetFeatureString())
197  ->getFeatureBits();
198  for (auto &F : M)
199  Features |= WasmTM->getSubtargetImpl(F)->getFeatureBits();
200  return Features;
201  }
202 
203  std::string getFeatureString(const FeatureBitset &Features) {
204  std::string Ret;
205  for (const SubtargetFeatureKV &KV : WebAssemblyFeatureKV) {
206  if (Features[KV.Value])
207  Ret += (StringRef("+") + KV.Key + ",").str();
208  }
209  return Ret;
210  }
211 
212  void replaceFeatures(Function &F, const std::string &Features) {
213  F.removeFnAttr("target-features");
214  F.removeFnAttr("target-cpu");
215  F.addFnAttr("target-features", Features);
216  }
217 
218  bool stripAtomics(Module &M) {
219  // Detect whether any atomics will be lowered, since there is no way to tell
220  // whether the LowerAtomic pass lowers e.g. stores.
221  bool Stripped = false;
222  for (auto &F : M) {
223  for (auto &B : F) {
224  for (auto &I : B) {
225  if (I.isAtomic()) {
226  Stripped = true;
227  goto done;
228  }
229  }
230  }
231  }
232 
233  done:
234  if (!Stripped)
235  return false;
236 
237  LowerAtomicPass Lowerer;
239  for (auto &F : M)
240  Lowerer.run(F, FAM);
241 
242  return true;
243  }
244 
245  bool stripThreadLocals(Module &M) {
246  bool Stripped = false;
247  for (auto &GV : M.globals()) {
248  if (GV.getThreadLocalMode() !=
249  GlobalValue::ThreadLocalMode::NotThreadLocal) {
250  Stripped = true;
251  GV.setThreadLocalMode(GlobalValue::ThreadLocalMode::NotThreadLocal);
252  }
253  }
254  return Stripped;
255  }
256 
257  void recordFeatures(Module &M, const FeatureBitset &Features, bool Stripped) {
258  for (const SubtargetFeatureKV &KV : WebAssemblyFeatureKV) {
259  std::string MDKey = (StringRef("wasm-feature-") + KV.Key).str();
260  if (KV.Value == WebAssembly::FeatureAtomics && Stripped) {
261  // "atomics" is special: code compiled without atomics may have had its
262  // atomics lowered to nonatomic operations. In that case, atomics is
263  // disallowed to prevent unsafe linking with atomics-enabled objects.
264  assert(!Features[WebAssembly::FeatureAtomics]);
267  } else if (Features[KV.Value]) {
268  // Otherwise features are marked Used or not mentioned
271  }
272  }
273  }
274 };
276 
277 /// WebAssembly Code Generator Pass Configuration Options.
278 class WebAssemblyPassConfig final : public TargetPassConfig {
279 public:
280  WebAssemblyPassConfig(WebAssemblyTargetMachine &TM, PassManagerBase &PM)
281  : TargetPassConfig(TM, PM) {}
282 
283  WebAssemblyTargetMachine &getWebAssemblyTargetMachine() const {
284  return getTM<WebAssemblyTargetMachine>();
285  }
286 
287  FunctionPass *createTargetRegisterAllocator(bool) override;
288 
289  void addIRPasses() override;
290  bool addInstSelector() override;
291  void addPostRegAlloc() override;
292  bool addGCPasses() override { return false; }
293  void addPreEmitPass() override;
294 
295  // No reg alloc
296  bool addRegAssignmentFast() override { return false; }
297 
298  // No reg alloc
299  bool addRegAssignmentOptimized() override { return false; }
300 };
301 } // end anonymous namespace
302 
305  return TargetTransformInfo(WebAssemblyTTIImpl(this, F));
306 }
307 
310  return new WebAssemblyPassConfig(*this, PM);
311 }
312 
313 FunctionPass *WebAssemblyPassConfig::createTargetRegisterAllocator(bool) {
314  return nullptr; // No reg alloc
315 }
316 
317 //===----------------------------------------------------------------------===//
318 // The following functions are called from lib/CodeGen/Passes.cpp to modify
319 // the CodeGen pass sequence.
320 //===----------------------------------------------------------------------===//
321 
322 void WebAssemblyPassConfig::addIRPasses() {
323  // Runs LowerAtomicPass if necessary
324  addPass(new CoalesceFeaturesAndStripAtomics(&getWebAssemblyTargetMachine()));
325 
326  // This is a no-op if atomics are not used in the module
327  addPass(createAtomicExpandPass());
328 
329  // Add signatures to prototype-less function declarations
331 
332  // Lower .llvm.global_dtors into .llvm_global_ctors with __cxa_atexit calls.
334 
335  // Fix function bitcasts, as WebAssembly requires caller and callee signatures
336  // to match.
338 
339  // Optimize "returned" function attributes.
340  if (getOptLevel() != CodeGenOpt::None)
342 
343  // If exception handling is not enabled and setjmp/longjmp handling is
344  // enabled, we lower invokes into calls and delete unreachable landingpad
345  // blocks. Lowering invokes when there is no EH support is done in
346  // TargetPassConfig::addPassesToHandleExceptions, but this runs after this
347  // function and SjLj handling expects all invokes to be lowered before.
348  if (!EnableEmException &&
349  TM->Options.ExceptionModel == ExceptionHandling::None) {
350  addPass(createLowerInvokePass());
351  // The lower invoke pass may create unreachable code. Remove it in order not
352  // to process dead blocks in setjmp/longjmp handling.
354  }
355 
356  // Handle exceptions and setjmp/longjmp if enabled.
359  EnableEmSjLj));
360 
362 }
363 
364 bool WebAssemblyPassConfig::addInstSelector() {
366  addPass(
367  createWebAssemblyISelDag(getWebAssemblyTargetMachine(), getOptLevel()));
368  // Run the argument-move pass immediately after the ScheduleDAG scheduler
369  // so that we can fix up the ARGUMENT instructions before anything else
370  // sees them in the wrong place.
372  // Set the p2align operands. This information is present during ISel, however
373  // it's inconvenient to collect. Collect it now, and update the immediate
374  // operands.
376  return false;
377 }
378 
379 void WebAssemblyPassConfig::addPostRegAlloc() {
380  // TODO: The following CodeGen passes don't currently support code containing
381  // virtual registers. Consider removing their restrictions and re-enabling
382  // them.
383 
384  // These functions all require the NoVRegs property.
385  disablePass(&MachineCopyPropagationID);
386  disablePass(&PostRAMachineSinkingID);
387  disablePass(&PostRASchedulerID);
388  disablePass(&FuncletLayoutID);
389  disablePass(&StackMapLivenessID);
390  disablePass(&LiveDebugValuesID);
391  disablePass(&PatchableFunctionID);
392  disablePass(&ShrinkWrapID);
393 
394  // This pass hurts code size for wasm because it can generate irreducible
395  // control flow.
396  disablePass(&MachineBlockPlacementID);
397 
399 }
400 
401 void WebAssemblyPassConfig::addPreEmitPass() {
403 
404  // Rewrite pseudo call_indirect instructions as real instructions.
405  // This needs to run before register stackification, because we change the
406  // order of the arguments.
408 
409  // Eliminate multiple-entry loops.
411 
412  // Do various transformations for exception handling.
413  // Every CFG-changing optimizations should come before this.
415 
416  // Now that we have a prologue and epilogue and all frame indices are
417  // rewritten, eliminate SP and FP. This allows them to be stackified,
418  // colored, and numbered with the rest of the registers.
420 
421  // Preparations and optimizations related to register stackification.
422  if (getOptLevel() != CodeGenOpt::None) {
423  // LiveIntervals isn't commonly run this late. Re-establish preconditions.
425 
426  // Depend on LiveIntervals and perform some optimizations on it.
428 
429  // Prepare memory intrinsic calls for register stackifying.
431 
432  // Mark registers as representing wasm's value stack. This is a key
433  // code-compression technique in WebAssembly. We run this pass (and
434  // MemIntrinsicResults above) very late, so that it sees as much code as
435  // possible, including code emitted by PEI and expanded by late tail
436  // duplication.
437  addPass(createWebAssemblyRegStackify());
438 
439  // Run the register coloring pass to reduce the total number of registers.
440  // This runs after stackification so that it doesn't consider registers
441  // that become stackified.
442  addPass(createWebAssemblyRegColoring());
443  }
444 
445  // Sort the blocks of the CFG into topological order, a prerequisite for
446  // BLOCK and LOOP markers.
447  addPass(createWebAssemblyCFGSort());
448 
449  // Insert BLOCK and LOOP markers.
450  addPass(createWebAssemblyCFGStackify());
451 
452  // Insert explicit local.get and local.set operators.
454 
455  // Lower br_unless into br_if.
457 
458  // Perform the very last peephole optimizations on the code.
459  if (getOptLevel() != CodeGenOpt::None)
460  addPass(createWebAssemblyPeephole());
461 
462  // Create a mapping from LLVM CodeGen virtual registers to wasm registers.
464 }
465 
468  return new yaml::WebAssemblyFunctionInfo();
469 }
470 
472  const MachineFunction &MF) const {
473  const auto *MFI = MF.getInfo<WebAssemblyFunctionInfo>();
474  return new yaml::WebAssemblyFunctionInfo(*MFI);
475 }
476 
479  SMDiagnostic &Error, SMRange &SourceRange) const {
480  const auto &YamlMFI =
481  reinterpret_cast<const yaml::WebAssemblyFunctionInfo &>(MFI);
482  MachineFunction &MF = PFS.MF;
483  MF.getInfo<WebAssemblyFunctionInfo>()->initializeBaseYamlFields(YamlMFI);
484  return false;
485 }
PreservedAnalyses run(Function &F, FunctionAnalysisManager &)
Represents a range in source code.
Definition: SMLoc.h:48
StringRef getTargetFeatureString() const
static GCMetadataPrinterRegistry::Add< ErlangGCPrinter > X("erlang", "erlang-compatible garbage collector")
FunctionPass * createWebAssemblyLowerBrUnless()
CodeModel::Model getEffectiveCodeModel(Optional< CodeModel::Model > CM, CodeModel::Model Default)
Helper method for getting the code model, returning Default if CM does not have a value...
ModulePass * createWebAssemblyLowerEmscriptenEHSjLj(bool DoEH, bool DoSjLj)
static PassRegistry * getPassRegistry()
getPassRegistry - Access the global registry object, which is automatically initialized at applicatio...
LLVM_NODISCARD std::string str() const
str - Get the contents as an std::string.
Definition: StringRef.h:218
static cl::opt< bool > EnableEmSjLj("enable-emscripten-sjlj", cl::desc("WebAssembly Emscripten-style setjmp/longjmp handling"), cl::init(false))
This class represents lattice values for constants.
Definition: AllocatorList.h:23
FunctionPass * createWebAssemblyCFGSort()
void initializeWebAssemblyOptimizeLiveIntervalsPass(PassRegistry &)
virtual void addIRPasses()
Add common target configurable passes that perform LLVM IR to IR transforms following machine indepen...
FunctionPass * createWebAssemblyArgumentMove()
A Module instance is used to store all the information related to an LLVM module. ...
Definition: Module.h:65
Triple TargetTriple
Triple string, CPU name, and target feature strings the TargetMachine instance is created with...
Definition: TargetMachine.h:84
This file a TargetTransformInfo::Concept conforming object specific to the WebAssembly target machine...
unsigned DataSections
Emit data into separate sections.
void initializeWebAssemblyMemIntrinsicResultsPass(PassRegistry &)
char & FuncletLayoutID
This pass lays out funclets contiguously.
FunctionPass * createWebAssemblyPeephole()
void initializeWebAssemblyRegStackifyPass(PassRegistry &)
void initializeWebAssemblyArgumentMovePass(PassRegistry &)
yaml::MachineFunctionInfo * createDefaultFuncInfoYAML() const override
Allocate and return a default initialized instance of the YAML representation for the MachineFunction...
F(f)
void initializeWebAssemblyFixIrreducibleControlFlowPass(PassRegistry &)
A pass that lowers atomic intrinsic into non-atomic intrinsics.
Definition: LowerAtomic.h:22
This file contains the entry points for global functions defined in the LLVM WebAssembly back-end...
virtual void addPreEmitPass()
This pass may be implemented by targets that want to run passes immediately before machine code is em...
static GCMetadataPrinterRegistry::Add< OcamlGCMetadataPrinter > Y("ocaml", "ocaml 3.10-compatible collector")
FunctionPass * createWebAssemblyRegStackify()
FunctionPass * createWebAssemblyOptimizeReturned()
This file declares the WebAssembly-specific subclass of TargetLoweringObjectFile. ...
void resetTargetOptions(const Function &F) const
Reset the target options based on the function&#39;s attributes.
FunctionPass * createWebAssemblyRegNumbering()
FunctionPass * createLowerInvokePass()
Definition: LowerInvoke.cpp:86
void initializeWebAssemblyRegNumberingPass(PassRegistry &)
No attributes have been set.
Definition: Attributes.h:71
void initializeWebAssemblyExceptionInfoPass(PassRegistry &)
void initializeOptimizeReturnedPass(PassRegistry &)
FunctionPass * createWebAssemblyRegColoring()
Target-Independent Code Generator Pass Configuration Options.
bool parseMachineFunctionInfo(const yaml::MachineFunctionInfo &, PerFunctionMIParsingState &PFS, SMDiagnostic &Error, SMRange &SourceRange) const override
Parse out the target&#39;s MachineFunctionInfo from the YAML reprsentation.
This file declares the WebAssembly-specific subclass of TargetMachine.
RegisterTargetMachine - Helper template for registering a target machine implementation, for use in the target machine initialization function.
const SubtargetFeatureKV WebAssemblyFeatureKV[WebAssembly::NumSubtargetFeatures]
unsigned FunctionSections
Emit functions into separate sections.
Used to provide key value pairs for feature and CPU bit flags.
FunctionPass * createUnreachableBlockEliminationPass()
createUnreachableBlockEliminationPass - The LLVM code generator does not work well with unreachable b...
StringRef getTargetCPU() const
unsigned UniqueSectionNames
ModulePass * createWebAssemblyAddMissingPrototypes()
void initializeWebAssemblyExplicitLocalsPass(PassRegistry &)
initializer< Ty > init(const Ty &Val)
Definition: CommandLine.h:427
bool hasAttribute(AttrKind Val) const
Return true if the attribute is present.
Definition: Attributes.cpp:201
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
CodeGenOpt::Level getOptLevel() const
Returns the optimization level: None, Less, Default, or Aggressive.
void initializeWebAssemblyPeepholePass(PassRegistry &)
Container class for subtarget features.
FunctionPass * createWebAssemblyISelDag(WebAssemblyTargetMachine &TM, CodeGenOpt::Level OptLevel)
This pass converts a legalized DAG into a WebAssembly-specific DAG, ready for instruction scheduling...
static Reloc::Model getEffectiveRelocModel(Optional< Reloc::Model > RM)
FunctionPass * createWebAssemblyCallIndirectFixup()
ModulePass * createWebAssemblyLowerGlobalDtors()
char & PostRAMachineSinkingID
This pass perform post-ra machine sink for COPY instructions.
This file provides WebAssembly-specific target descriptions.
void initializeWebAssemblyCallIndirectFixupPass(PassRegistry &)
virtual bool addInstSelector()
addInstSelector - This method should install an instruction selector pass, which converts from LLVM c...
void addModuleFlag(ModFlagBehavior Behavior, StringRef Key, Metadata *Val)
Add a module-level flag to the module-level flags metadata.
Definition: Module.cpp:337
char & LiveDebugValuesID
LiveDebugValues pass.
This class describes a target machine that is implemented with the LLVM target-independent code gener...
Ty * getInfo()
getInfo - Keep track of various per-function pieces of information for backends that would like to do...
void initializeWebAssemblyReplacePhysRegsPass(PassRegistry &)
FunctionPass class - This class is used to implement most global optimizations.
Definition: Pass.h:284
FunctionPass * createWebAssemblySetP2AlignOperands()
void initializeWebAssemblyLowerEmscriptenEHSjLjPass(PassRegistry &)
char & MachineCopyPropagationID
MachineCopyPropagation - This pass performs copy propagation on machine instructions.
static cl::opt< bool > EnableEmException("enable-emscripten-cxx-exceptions", cl::desc("WebAssembly Emscripten-style exception handling"), cl::init(false))
void initializeWebAssemblyLateEHPreparePass(PassRegistry &)
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:43
char & PostRASchedulerID
createPostRAScheduler - This pass performs post register allocation scheduling.
ModulePass * createWebAssemblyFixFunctionBitcasts()
This pass provides access to the codegen interfaces that are needed for IR-level transformations.
PassManagerBase - An abstract interface to allow code to add passes to a pass manager without having ...
char & StackMapLivenessID
StackMapLiveness - This pass analyses the register live-out set of stackmap/patchpoint intrinsics and...
yaml::MachineFunctionInfo * convertFuncInfoToYAML(const MachineFunction &MF) const override
Allocate and initialize an instance of the YAML representation of the MachineFunctionInfo.
TargetPassConfig * createPassConfig(PassManagerBase &PM) override
Create a pass configuration object to be used by addPassToEmitX methods for generating a pipeline of ...
void initializeWebAssemblyLowerBrUnlessPass(PassRegistry &)
FunctionPass * createWebAssemblyMemIntrinsicResults()
FunctionPass * createWebAssemblyFixIrreducibleControlFlow()
Target - Wrapper for Target specific information.
virtual void addPostRegAlloc()
This method may be implemented by targets that want to run passes after register allocation pass pipe...
void initializeWebAssemblyCFGStackifyPass(PassRegistry &)
std::string TargetCPU
Definition: TargetMachine.h:85
Targets should override this in a way that mirrors the implementation of llvm::MachineFunctionInfo.
char & PatchableFunctionID
This pass implements the "patchable-function" attribute.
This class is derived from MachineFunctionInfo and contains private WebAssembly-specific information ...
bool hasValue() const
Definition: Optional.h:259
const WebAssemblySubtarget * getSubtargetImpl(std::string CPU, std::string FS) const
StringRef getValueAsString() const
Return the attribute&#39;s value as a string.
Definition: Attributes.cpp:194
FunctionPass * createWebAssemblyLateEHPrepare()
TargetTransformInfo getTargetTransformInfo(const Function &F) override
Get a TargetTransformInfo implementation for the target.
No exception support.
#define I(x, y, z)
Definition: MD5.cpp:58
ModulePass class - This class is used to implement unstructured interprocedural optimizations and ana...
Definition: Pass.h:224
This file declares WebAssembly-specific per-machine-function information.
char & MachineBlockPlacementID
MachineBlockPlacement - This pass places basic blocks based on branch probabilities.
WebAssemblyTargetMachine(const Target &T, const Triple &TT, StringRef CPU, StringRef FS, const TargetOptions &Options, Optional< Reloc::Model > RM, Optional< CodeModel::Model > CM, CodeGenOpt::Level OL, bool JIT)
Create an WebAssembly architecture model.
void LLVMInitializeWebAssemblyTarget()
void initializeWebAssemblyAddMissingPrototypesPass(PassRegistry &)
void initializeFixFunctionBitcastsPass(PassRegistry &)
std::string TargetFS
Definition: TargetMachine.h:86
void removeFnAttr(Attribute::AttrKind Kind)
Remove function attributes from this function.
Definition: Function.h:245
FunctionPass * createWebAssemblyOptimizeLiveIntervals()
FunctionPass * createWebAssemblyCFGStackify()
void initializeWebAssemblyPrepareForLiveIntervalsPass(PassRegistry &)
void initializeWebAssemblySetP2AlignOperandsPass(PassRegistry &)
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
void initializeLowerGlobalDtorsPass(PassRegistry &)
Lightweight error class with error context and mandatory checking.
Definition: Error.h:157
FunctionPass * createWebAssemblyPrepareForLiveIntervals()
Attribute getFnAttribute(Attribute::AttrKind Kind) const
Return the attribute for the given attribute kind.
Definition: Function.h:330
void addFnAttr(Attribute::AttrKind Kind)
Add function attributes to this function.
Definition: Function.h:229
iterator_range< global_iterator > globals()
Definition: Module.h:587
char & ShrinkWrapID
ShrinkWrap pass. Look for the best place to insert save and restore.
Definition: ShrinkWrap.cpp:249
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
A container for analyses that lazily runs them and caches their results.
unsigned TrapUnreachable
Emit target-specific trap instruction for &#39;unreachable&#39; IR instructions.
Target & getTheWebAssemblyTarget32()
FunctionPass * createWebAssemblyReplacePhysRegs()
void initializeWebAssemblyCFGSortPass(PassRegistry &)
FunctionPass * createAtomicExpandPass()
Target & getTheWebAssemblyTarget64()
FunctionPass * createWebAssemblyExplicitLocals()
void initializeWebAssemblyRegColoringPass(PassRegistry &)
Instances of this class encapsulate one diagnostic report, allowing printing to a raw_ostream as a ca...
Definition: SourceMgr.h:259