LLVM 17.0.0git
Classes | Namespaces | Macros | Typedefs | Enumerations | Functions
CoroFrame.cpp File Reference
#include "CoroInternal.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/PostOrderIterator.h"
#include "llvm/ADT/ScopeExit.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Analysis/PtrUseVisitor.h"
#include "llvm/Analysis/StackLifetime.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/IR/CFG.h"
#include "llvm/IR/DIBuilder.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/OptimizedStructLayout.h"
#include "llvm/Support/circular_raw_ostream.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/Transforms/Utils/PromoteMemToReg.h"
#include <algorithm>
#include <deque>
#include <optional>

Go to the source code of this file.

Classes

struct  llvm::GraphTraits< RematGraph * >
 

Namespaces

namespace  llvm
 This is an optimization pass for GlobalISel generic memory operations.
 

Macros

#define DEBUG_TYPE   "coro-suspend-crossing"
 
#define DEBUG_TYPE   "coro-frame"
 

Typedefs

typedef SmallPtrSet< BasicBlock *, 8 > VisitedBlocksSet
 

Enumerations

enum  { SmallVectorThreshold = 32 }
 

Functions

static void dumpSpills (StringRef Title, const SpillInfo &Spills)
 
static void dumpRemats (StringRef Title, const SmallMapVector< Instruction *, std::unique_ptr< RematGraph >, 8 > &RM)
 
static void dumpAllocas (const SmallVectorImpl< AllocaInfo > &Allocas)
 
static void cacheDIVar (FrameDataInfo &FrameData, DenseMap< Value *, DILocalVariable * > &DIVarCache)
 
static StringRef solveTypeName (Type *Ty)
 Create name for Type.
 
static DIType * solveDIType (DIBuilder &Builder, Type *Ty, const DataLayout &Layout, DIScope *Scope, unsigned LineNum, DenseMap< Type *, DIType * > &DITypeCache)
 
static void buildFrameDebugInfo (Function &F, coro::Shape &Shape, FrameDataInfo &FrameData)
 Build artificial debug info for C++ coroutine frames to allow users to inspect the contents of the frame directly.
 
static StructType * buildFrameType (Function &F, coro::Shape &Shape, FrameDataInfo &FrameData)
 
static Instruction * splitBeforeCatchSwitch (CatchSwitchInst *CatchSwitch)
 
static void createFramePtr (coro::Shape &Shape)
 
static void insertSpills (const FrameDataInfo &FrameData, coro::Shape &Shape)
 
static void movePHIValuesToInsertedBlock (BasicBlock *SuccBB, BasicBlock *InsertedBB, BasicBlock *PredBB, PHINode *UntilPHI=nullptr)
 
static void rewritePHIsForCleanupPad (BasicBlock *CleanupPadBB, CleanupPadInst *CleanupPad)
 
static void cleanupSinglePredPHIs (Function &F)
 
static void rewritePHIs (BasicBlock &BB)
 
static void rewritePHIs (Function &F)
 
static bool isCoroutineStructureIntrinsic (Instruction &I)
 
static void rewriteMaterializableInstructions (const SmallMapVector< Instruction *, std::unique_ptr< RematGraph >, 8 > &AllRemats)
 
static BasicBlock * splitBlockIfNotFirst (Instruction *I, const Twine &Name)
 
static void splitAround (Instruction *I, const Twine &Name)
 
static bool isSuspendBlock (BasicBlock *BB)
 
static bool isSuspendReachableFrom (BasicBlock *From, VisitedBlocksSet &VisitedOrFreeBBs)
 Does control flow starting at the given block ever reach a suspend instruction before reaching a block in VisitedOrFreeBBs?
 
static bool isLocalAlloca (CoroAllocaAllocInst *AI)
 Is the given alloca "local", i.e.
 
static bool willLeaveFunctionImmediatelyAfter (BasicBlock *BB, unsigned depth=3)
 After we split the coroutine, will the given basic block be along an obvious exit path for the resumption function?
 
static bool localAllocaNeedsStackSave (CoroAllocaAllocInst *AI)
 
static void lowerLocalAllocas (ArrayRef< CoroAllocaAllocInst * > LocalAllocas, SmallVectorImpl< Instruction * > &DeadInsts)
 Turn each of the given local allocas into a normal (dynamic) alloca instruction.
 
static Instruction * lowerNonLocalAlloca (CoroAllocaAllocInst *AI, coro::Shape &Shape, SmallVectorImpl< Instruction * > &DeadInsts)
 Turn the given coro.alloca.alloc call into a dynamic allocation.
 
static Value * emitGetSwiftErrorValue (IRBuilder<> &Builder, Type *ValueTy, coro::Shape &Shape)
 Get the current swifterror value.
 
static Value * emitSetSwiftErrorValue (IRBuilder<> &Builder, Value *V, coro::Shape &Shape)
 Set the given value as the current swifterror value.
 
static Value * emitSetAndGetSwiftErrorValueAround (Instruction *Call, AllocaInst *Alloca, coro::Shape &Shape)
 Set the swifterror value from the given alloca before a call, then put in back in the alloca afterwards.
 
static void eliminateSwiftErrorAlloca (Function &F, AllocaInst *Alloca, coro::Shape &Shape)
 Eliminate a formerly-swifterror alloca by inserting the get/set intrinsics and attempting to MemToReg the alloca away.
 
static void eliminateSwiftErrorArgument (Function &F, Argument &Arg, coro::Shape &Shape, SmallVectorImpl< AllocaInst * > &AllocasToPromote)
 "Eliminate" a swifterror argument by reducing it to the alloca case and then loading and storing in the prologue and epilog.
 
static void eliminateSwiftError (Function &F, coro::Shape &Shape)
 Eliminate all problematic uses of swifterror arguments and allocas from the function.
 
static void sinkSpillUsesAfterCoroBegin (Function &F, const FrameDataInfo &FrameData, CoroBeginInst *CoroBegin)
 retcon and retcon.once conventions assume that all spill uses can be sunk after the coro.begin intrinsic.
 
static void sinkLifetimeStartMarkers (Function &F, coro::Shape &Shape, SuspendCrossingInfo &Checker)
 For each local variable that all of its user are only used inside one of suspended region, we sink their lifetime.start markers to the place where after the suspend block.
 
static void collectFrameAlloca (AllocaInst *AI, coro::Shape &Shape, const SuspendCrossingInfo &Checker, SmallVectorImpl< AllocaInfo > &Allocas, const DominatorTree &DT)
 
static void doRematerializations (Function &F, SuspendCrossingInfo &Checker, const std::function< bool(Instruction &)> &MaterializableCallback)
 

Macro Definition Documentation

◆ DEBUG_TYPE [1/2]

#define DEBUG_TYPE   "coro-suspend-crossing"

Definition at line 447 of file CoroFrame.cpp.

◆ DEBUG_TYPE [2/2]

#define DEBUG_TYPE   "coro-frame"

Definition at line 447 of file CoroFrame.cpp.

Typedef Documentation

◆ VisitedBlocksSet

typedef SmallPtrSet<BasicBlock*, 8> VisitedBlocksSet

Definition at line 2360 of file CoroFrame.cpp.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum
Enumerator
SmallVectorThreshold 

Definition at line 50 of file CoroFrame.cpp.

Function Documentation

◆ buildFrameDebugInfo()

static void buildFrameDebugInfo ( Function &  F,
coro::Shape &  Shape,
FrameDataInfo &  FrameData 
)
static

Build artificial debug info for C++ coroutine frames to allow users to inspect the contents of the frame directly.

Create Debug information for coroutine frame with debug name "__coro_frame". The debug information for the fields of coroutine frame is constructed from the following way:

  1. For all the value in the Frame, we search the use of dbg.declare to find the corresponding debug variables for the value. If we can find the debug variable, we can get full and accurate debug information.
  2. If we can't get debug information in step 1 and 2, we could only try to build the DIType by Type. We did this in solveDIType. We only handle integer, float, double, integer type and struct type for now.

FIXME: If we fill the field SizeInBits with the actual size of __coro_index in bits, then __coro_index wouldn't show in the debugger.

Definition at line 1110 of file CoroFrame.cpp.

References llvm::coro::Shape::ABI, assert(), cacheDIVar(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::contains(), llvm::DIBuilder::createAutoVariable(), llvm::DIBuilder::createBasicType(), llvm::DIBuilder::createExpression(), llvm::DIBuilder::createMemberType(), llvm::DIBuilder::createPointerType(), llvm::DIBuilder::createStructType(), llvm::coro::Shape::SwitchFieldIndex::Destroy, llvm::TinyPtrVector< EltTy >::empty(), F, llvm::FindDbgDeclareUses(), llvm::coro::Shape::FrameAlign, llvm::coro::Shape::FramePtr, llvm::coro::Shape::FrameSize, llvm::coro::Shape::FrameTy, llvm::TinyPtrVector< EltTy >::front(), llvm::DebugLoc::get(), llvm::MDTuple::get(), llvm::Instruction::getDebugLoc(), llvm::StructType::getElementType(), llvm::DIScope::getFile(), llvm::details::FixedOrScalableQuantity< LeafTy, ValueTy >::getFixedValue(), llvm::coro::Shape::getInsertPtAfterFramePtr(), llvm::DIVariable::getLine(), llvm::DIType::getName(), llvm::StructType::getNumElements(), llvm::DIBuilder::getOrCreateArray(), llvm::coro::Shape::getPromiseAlloca(), llvm::DILocalVariable::getScope(), llvm::DataLayout::getTypeSizeInBits(), llvm::DbgVariableIntrinsic::getVariable(), llvm::coro::Shape::SwitchLoweringStorage::IndexAlign, llvm::coro::Shape::SwitchLoweringStorage::IndexField, llvm::coro::Shape::SwitchLoweringStorage::IndexOffset, llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::insert(), llvm::dwarf::isCPlusPlus(), llvm::Type::isSized(), Name, llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::DIBuilder::replaceArrays(), llvm::coro::Shape::SwitchFieldIndex::Resume, solveDIType(), llvm::StringRef::str(), llvm::Twine::str(), llvm::coro::Shape::SwitchLowering, llvm::Align::value(), and value.

Referenced by llvm::coro::buildCoroutineFrame().

◆ buildFrameType()

static StructType * buildFrameType ( Function &  F,
coro::Shape &  Shape,
FrameDataInfo &  FrameData 
)
static

Definition at line 1283 of file CoroFrame.cpp.

References A, llvm::coro::Shape::ABI, llvm::alignTo(), assert(), llvm::coro::Shape::AsyncLowering, B, llvm::CallingConv::C, llvm::coro::Shape::AsyncLoweringStorage::ContextHeaderSize, llvm::coro::Shape::AsyncLoweringStorage::ContextSize, llvm::coro::Shape::CoroSuspends, llvm::StructType::create(), DL, F, llvm::coro::Shape::FrameAlign, llvm::coro::Shape::AsyncLoweringStorage::FrameOffset, llvm::coro::Shape::FrameSize, llvm::coro::Shape::AsyncLoweringStorage::getContextAlignment(), llvm::Type::getIntNTy(), llvm::Type::getPointerTo(), llvm::coro::Shape::getPromiseAlloca(), llvm::coro::Shape::getRetconCoroId(), llvm::Type::getVoidTy(), llvm::coro::Shape::SwitchLoweringStorage::IndexAlign, llvm::coro::Shape::SwitchLoweringStorage::IndexField, llvm::coro::Shape::SwitchLoweringStorage::IndexOffset, llvm::coro::Shape::RetconLoweringStorage::IsFrameInlineInStorage, llvm::Log2_64_Ceil(), Name, llvm::report_fatal_error(), llvm::coro::Shape::RetconLowering, and llvm::coro::Shape::SwitchLowering.

Referenced by llvm::coro::buildCoroutineFrame().

◆ cacheDIVar()

static void cacheDIVar ( FrameDataInfo &  FrameData,
DenseMap< Value *, DILocalVariable * > &  DIVarCache 
)
static

Definition at line 958 of file CoroFrame.cpp.

References llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::contains(), llvm::find_if(), llvm::FindDbgDeclareUses(), llvm::DbgVariableIntrinsic::getExpression(), I, and llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::insert().

Referenced by buildFrameDebugInfo().

◆ cleanupSinglePredPHIs()

static void cleanupSinglePredPHIs ( Function &  F)
static

Definition at line 2143 of file CoroFrame.cpp.

References llvm::SmallVectorBase< Size_T >::empty(), F, llvm::BasicBlock::phis(), llvm::SmallVectorImpl< T >::pop_back_val(), and llvm::SmallVectorTemplateBase< T, bool >::push_back().

Referenced by llvm::coro::buildCoroutineFrame().

◆ collectFrameAlloca()

static void collectFrameAlloca ( AllocaInst *  AI,
coro::Shape &  Shape,
const SuspendCrossingInfo &  Checker,
SmallVectorImpl< AllocaInfo > &  Allocas,
const DominatorTree &  DT 
)
static

Definition at line 2804 of file CoroFrame.cpp.

References llvm::coro::Shape::ABI, llvm::coro::Shape::CoroBegin, llvm::coro::Shape::CoroSuspends, llvm::SmallVectorImpl< T >::emplace_back(), llvm::Module::getDataLayout(), llvm::Instruction::getModule(), llvm::coro::Shape::SwitchLoweringStorage::PromiseAlloca, and llvm::coro::Shape::SwitchLowering.

Referenced by llvm::coro::buildCoroutineFrame().

◆ createFramePtr()

static void createFramePtr ( coro::Shape &  Shape)
static

Definition at line 1693 of file CoroFrame.cpp.

References Builder, llvm::coro::Shape::CoroBegin, llvm::coro::Shape::FramePtr, llvm::coro::Shape::FrameTy, llvm::ilist_node_with_parent< NodeTy, ParentTy, Options >::getNextNode(), and llvm::Type::getPointerTo().

Referenced by llvm::coro::buildCoroutineFrame().

◆ doRematerializations()

static void doRematerializations ( Function &  F,
SuspendCrossingInfo &  Checker,
const std::function< bool(Instruction &)> &  MaterializableCallback 
)
static

Definition at line 2928 of file CoroFrame.cpp.

References llvm::MapVector< KeyT, ValueT, MapType, VectorType >::count(), llvm::dbgs(), dumpRemats(), E, F, I, instructions, LLVM_DEBUG, and rewriteMaterializableInstructions().

Referenced by llvm::coro::buildCoroutineFrame().

◆ dumpAllocas()

static void dumpAllocas ( const SmallVectorImpl< AllocaInfo > &  Allocas)
static

Definition at line 567 of file CoroFrame.cpp.

References A, and llvm::dbgs().

Referenced by llvm::coro::buildCoroutineFrame().

◆ dumpRemats()

static void dumpRemats ( StringRef  Title,
const SmallMapVector< Instruction *, std::unique_ptr< RematGraph >, 8 > &  RM 
)
static

Definition at line 557 of file CoroFrame.cpp.

References llvm::dbgs(), and E.

Referenced by doRematerializations().

◆ dumpSpills()

static void dumpSpills ( StringRef  Title,
const SpillInfo &  Spills 
)
static

Definition at line 548 of file CoroFrame.cpp.

References llvm::dbgs(), E, and I.

Referenced by llvm::coro::buildCoroutineFrame().

◆ eliminateSwiftError()

static void eliminateSwiftError ( Function &  F,
coro::Shape &  Shape 
)
static

Eliminate all problematic uses of swifterror arguments and allocas from the function.

We'll fix them up later when splitting the function.

Definition at line 2636 of file CoroFrame.cpp.

References Arg, eliminateSwiftErrorAlloca(), eliminateSwiftErrorArgument(), llvm::SmallVectorBase< Size_T >::empty(), F, llvm::AllocaInst::isSwiftError(), llvm::PromoteMemToReg(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::AllocaInst::setSwiftError().

Referenced by llvm::coro::buildCoroutineFrame().

◆ eliminateSwiftErrorAlloca()

static void eliminateSwiftErrorAlloca ( Function &  F,
AllocaInst *  Alloca,
coro::Shape &  Shape 
)
static

Eliminate a formerly-swifterror alloca by inserting the get/set intrinsics and attempting to MemToReg the alloca away.

Definition at line 2570 of file CoroFrame.cpp.

References Addr, assert(), emitSetAndGetSwiftErrorValueAround(), llvm::Use::getUser(), llvm::isAllocaPromotable(), llvm::make_early_inc_range(), llvm::Use::set(), and llvm::Value::uses().

Referenced by eliminateSwiftError(), and eliminateSwiftErrorArgument().

◆ eliminateSwiftErrorArgument()

static void eliminateSwiftErrorArgument ( Function &  F,
Argument &  Arg,
coro::Shape &  Shape,
SmallVectorImpl< AllocaInst * > &  AllocasToPromote 
)
static

"Eliminate" a swifterror argument by reducing it to the alloca case and then loading and storing in the prologue and epilog.

The argument keeps the swifterror flag.

Definition at line 2596 of file CoroFrame.cpp.

References Arg, Builder, llvm::coro::Shape::CoroEnds, llvm::coro::Shape::CoroSuspends, eliminateSwiftErrorAlloca(), emitSetAndGetSwiftErrorValueAround(), emitSetSwiftErrorValue(), End, F, llvm::Constant::getNullValue(), and llvm::SmallVectorTemplateBase< T, bool >::push_back().

Referenced by eliminateSwiftError().

◆ emitGetSwiftErrorValue()

static Value * emitGetSwiftErrorValue ( IRBuilder<> &  Builder,
Type *  ValueTy,
coro::Shape &  Shape 
)
static

Get the current swifterror value.

Definition at line 2507 of file CoroFrame.cpp.

References Builder, llvm::ConstantPointerNull::get(), and llvm::coro::Shape::SwiftErrorOps.

Referenced by emitSetAndGetSwiftErrorValueAround().

◆ emitSetAndGetSwiftErrorValueAround()

static Value * emitSetAndGetSwiftErrorValueAround ( Instruction *  Call,
AllocaInst *  Alloca,
coro::Shape &  Shape 
)
static

Set the swifterror value from the given alloca before a call, then put in back in the alloca afterwards.

Returns an address that will stand in for the swifterror slot until splitting.

Definition at line 2540 of file CoroFrame.cpp.

References Addr, Builder, emitGetSwiftErrorValue(), emitSetSwiftErrorValue(), and llvm::AllocaInst::getAllocatedType().

Referenced by eliminateSwiftErrorAlloca(), and eliminateSwiftErrorArgument().

◆ emitSetSwiftErrorValue()

static Value * emitSetSwiftErrorValue ( IRBuilder<> &  Builder,
Value *  V,
coro::Shape &  Shape 
)
static

Set the given value as the current swifterror value.

Returns a slot that can be used as a swifterror slot.

Definition at line 2522 of file CoroFrame.cpp.

References Builder, llvm::ConstantPointerNull::get(), and llvm::coro::Shape::SwiftErrorOps.

Referenced by eliminateSwiftErrorArgument(), and emitSetAndGetSwiftErrorValueAround().

◆ insertSpills()

static void insertSpills ( const FrameDataInfo &  FrameData,
coro::Shape &  Shape 
)
static

Definition at line 1724 of file CoroFrame.cpp.

References A, llvm::coro::Shape::ABI, llvm::coro::Shape::AllocaSpillBlock, llvm::any_of(), Arg, assert(), Builder, llvm::CallingConv::C, llvm::SmallVectorImpl< T >::clear(), llvm::coro::Shape::CoroBegin, llvm::DominatorTree::dominates(), E, llvm::SmallVectorBase< Size_T >::empty(), llvm::TinyPtrVector< EltTy >::empty(), llvm::Instruction::eraseFromParent(), F, llvm::FindDbgDeclareUses(), llvm::findDbgUsers(), FramePtr, llvm::coro::Shape::FramePtr, llvm::coro::Shape::FrameTy, llvm::BasicBlock::front(), G, GEP, llvm::IntegerType::get(), llvm::ConstantInt::get(), llvm::AllocaInst::getAlign(), llvm::AllocaInst::getAllocatedType(), llvm::AllocaInst::getArraySize(), llvm::Value::getContext(), llvm::StructType::getElementType(), llvm::BasicBlock::getFirstInsertionPt(), llvm::BasicBlock::getFirstNonPHI(), llvm::Instruction::getFunction(), llvm::coro::Shape::getInsertPtAfterFramePtr(), llvm::Type::getInt32Ty(), llvm::Type::getInt8PtrTy(), llvm::Type::getInt8Ty(), llvm::Instruction::getModule(), llvm::Value::getName(), llvm::GlobalValue::getParent(), llvm::BasicBlock::getParent(), llvm::Instruction::getParent(), llvm::BasicBlock::getSingleSuccessor(), llvm::BasicBlock::getTerminator(), llvm::AllocaInst::getType(), I, llvm::AllocaInst::isArrayAllocation(), llvm::coro::Shape::OptimizeFrame, P, llvm::coro::Shape::SwitchLoweringStorage::PromiseAlloca, llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::Value::replaceAllUsesWith(), llvm::report_fatal_error(), llvm::coro::salvageDebugInfo(), llvm::BasicBlock::splitBasicBlock(), splitBeforeCatchSwitch(), llvm::SplitEdge(), llvm::coro::Shape::SwitchLowering, llvm::Value::users(), llvm::Value::uses(), and llvm::Align::value().

Referenced by llvm::coro::buildCoroutineFrame().

◆ isCoroutineStructureIntrinsic()

static bool isCoroutineStructureIntrinsic ( Instruction &  I)
static

Definition at line 2252 of file CoroFrame.cpp.

References I.

Referenced by llvm::coro::buildCoroutineFrame().

◆ isLocalAlloca()

static bool isLocalAlloca ( CoroAllocaAllocInst *  AI)
static

Is the given alloca "local", i.e.

bounded in lifetime to not cross a suspend point?

Definition at line 2387 of file CoroFrame.cpp.

References llvm::Instruction::getParent(), llvm::SmallPtrSetImpl< PtrType >::insert(), isSuspendReachableFrom(), and llvm::Value::users().

Referenced by llvm::coro::buildCoroutineFrame().

◆ isSuspendBlock()

static bool isSuspendBlock ( BasicBlock *  BB)
static

Definition at line 2356 of file CoroFrame.cpp.

References llvm::BasicBlock::front().

Referenced by isSuspendReachableFrom(), sinkLifetimeStartMarkers(), and willLeaveFunctionImmediatelyAfter().

◆ isSuspendReachableFrom()

static bool isSuspendReachableFrom ( BasicBlock *  From,
VisitedBlocksSet &  VisitedOrFreeBBs 
)
static

Does control flow starting at the given block ever reach a suspend instruction before reaching a block in VisitedOrFreeBBs?

Definition at line 2364 of file CoroFrame.cpp.

References From, llvm::SmallPtrSetImpl< PtrType >::insert(), isSuspendBlock(), isSuspendReachableFrom(), and llvm::successors().

Referenced by isLocalAlloca(), and isSuspendReachableFrom().

◆ localAllocaNeedsStackSave()

static bool localAllocaNeedsStackSave ( CoroAllocaAllocInst *  AI)
static

Definition at line 2420 of file CoroFrame.cpp.

References llvm::Value::users(), and willLeaveFunctionImmediatelyAfter().

Referenced by lowerLocalAllocas().

◆ lowerLocalAllocas()

static void lowerLocalAllocas ( ArrayRef< CoroAllocaAllocInst * >  LocalAllocas,
SmallVectorImpl< Instruction * > &  DeadInsts 
)
static

Turn each of the given local allocas into a normal (dynamic) alloca instruction.

Definition at line 2438 of file CoroFrame.cpp.

References Builder, llvm::Intrinsic::getDeclaration(), llvm::Instruction::getModule(), localAllocaNeedsStackSave(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::AllocaInst::setAlignment(), and llvm::Value::users().

Referenced by llvm::coro::buildCoroutineFrame().

◆ lowerNonLocalAlloca()

static Instruction * lowerNonLocalAlloca ( CoroAllocaAllocInst *  AI,
coro::Shape &  Shape,
SmallVectorImpl< Instruction * > &  DeadInsts 
)
static

Turn the given coro.alloca.alloc call into a dynamic allocation.

This happens during the all-instructions iteration, so it must not delete the call.

Definition at line 2482 of file CoroFrame.cpp.

References Builder, llvm::coro::Shape::emitAlloc(), llvm::coro::Shape::emitDealloc(), llvm::CoroAllocaAllocInst::getSize(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::Value::users().

Referenced by llvm::coro::buildCoroutineFrame().

◆ movePHIValuesToInsertedBlock()

static void movePHIValuesToInsertedBlock ( BasicBlock *  SuccBB,
BasicBlock *  InsertedBB,
BasicBlock *  PredBB,
PHINode *  UntilPHI = nullptr 
)
static

Definition at line 2050 of file CoroFrame.cpp.

References llvm::PHINode::addIncoming(), llvm::PHINode::Create(), llvm::BasicBlock::front(), and llvm::Value::getName().

Referenced by rewritePHIs(), and rewritePHIsForCleanupPad().

◆ rewriteMaterializableInstructions()

static void rewriteMaterializableInstructions ( const SmallMapVector< Instruction *, std::unique_ptr< RematGraph >, 8 > &  AllRemats)
static

Definition at line 2260 of file CoroFrame.cpp.

References assert(), llvm::ReversePostOrderTraversal< GraphT, GT >::begin(), D, E, llvm::ReversePostOrderTraversal< GraphT, GT >::end(), llvm::BasicBlock::getTerminator(), I, llvm::Instruction::insertBefore(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::Value::setName().

Referenced by doRematerializations().

◆ rewritePHIs() [1/2]

static void rewritePHIs ( BasicBlock &  BB)
static

Definition at line 2160 of file CoroFrame.cpp.

References assert(), llvm::PHINode::Create(), llvm::ehAwareSplitEdge(), llvm::Instruction::eraseFromParent(), llvm::BasicBlock::getFirstNonPHI(), llvm::Value::getName(), llvm::Value::getType(), movePHIValuesToInsertedBlock(), llvm::predecessors(), llvm::Value::replaceAllUsesWith(), rewritePHIsForCleanupPad(), and llvm::Value::takeName().

Referenced by llvm::coro::buildCoroutineFrame(), and rewritePHIs().

◆ rewritePHIs() [2/2]

static void rewritePHIs ( Function &  F)
static

Definition at line 2230 of file CoroFrame.cpp.

References F, llvm::BasicBlock::front(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and rewritePHIs().

◆ rewritePHIsForCleanupPad()

static void rewritePHIsForCleanupPad ( BasicBlock *  CleanupPadBB,
CleanupPadInst *  CleanupPad 
)
static

Definition at line 2068 of file CoroFrame.cpp.

References Builder, llvm::BasicBlock::Create(), llvm::ConstantInt::get(), llvm::BasicBlock::getContext(), llvm::Value::getName(), llvm::BasicBlock::getParent(), llvm::Instruction::insertAfter(), movePHIValuesToInsertedBlock(), llvm::pred_size(), llvm::predecessors(), llvm::Instruction::removeFromParent(), llvm::setUnwindEdgeTo(), and llvm::updatePhiNodes().

Referenced by rewritePHIs().

◆ sinkLifetimeStartMarkers()

static void sinkLifetimeStartMarkers ( Function &  F,
coro::Shape &  Shape,
SuspendCrossingInfo &  Checker 
)
static

For each local variable that all of its user are only used inside one of suspended region, we sink their lifetime.start markers to the place where after the suspend block.

Doing so minimizes the lifetime of each variable, hence minimizing the amount of data we end up putting on the frame.

Definition at line 2716 of file CoroFrame.cpp.

References assert(), llvm::coro::Shape::CoroSuspends, llvm::CastInst::Create(), llvm::DominatorTree::dominates(), F, llvm::Type::getInt8PtrTy(), llvm::IntrinsicInst::getIntrinsicID(), llvm::BasicBlock::getParent(), llvm::Instruction::getParent(), llvm::BasicBlock::getSingleSuccessor(), I, llvm::SmallPtrSetImpl< PtrType >::insert(), instructions, isLifetimeStart(), isSuspendBlock(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallVectorBase< Size_T >::size(), and llvm::Value::users().

Referenced by llvm::coro::buildCoroutineFrame().

◆ sinkSpillUsesAfterCoroBegin()

static void sinkSpillUsesAfterCoroBegin ( Function &  F,
const FrameDataInfo &  FrameData,
CoroBeginInst *  CoroBegin 
)
static

retcon and retcon.once conventions assume that all spill uses can be sunk after the coro.begin intrinsic.

Definition at line 2669 of file CoroFrame.cpp.

References A, B, llvm::SetVector< T, Vector, Set >::begin(), llvm::DominatorTree::dominates(), llvm::SmallVectorBase< Size_T >::empty(), llvm::SetVector< T, Vector, Set >::end(), F, llvm::ilist_node_with_parent< NodeTy, ParentTy, Options >::getNextNode(), llvm::Instruction::getParent(), llvm::SetVector< T, Vector, Set >::insert(), llvm::Instruction::moveBefore(), llvm::SmallVectorImpl< T >::pop_back_val(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::sort().

Referenced by llvm::coro::buildCoroutineFrame().

◆ solveDIType()

static DIType * solveDIType ( DIBuilder &  Builder,
Type *  Ty,
const DataLayout &  Layout,
DIScope *  Scope,
unsigned  LineNum,
DenseMap< Type *, DIType * > &  DITypeCache 
)
static

Definition at line 1023 of file CoroFrame.cpp.

References assert(), llvm::BitWidth, Builder, llvm::dbgs(), llvm::TypeSize::Fixed(), llvm::DataLayout::getABITypeAlign(), llvm::DIType::getAlignInBits(), llvm::StructLayout::getElementOffsetInBits(), llvm::DIType::getName(), llvm::DataLayout::getPrefTypeAlign(), llvm::DIType::getSizeInBits(), llvm::DataLayout::getStructLayout(), llvm::DataLayout::getTypeSizeInBits(), I, llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::insert(), llvm::Type::isFloatingPointTy(), llvm::Type::isIntegerTy(), llvm::Type::isPointerTy(), llvm::Type::isStructTy(), LLVM_DEBUG, llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::lookup(), Name, Size, solveDIType(), solveTypeName(), and llvm::Align::value().

Referenced by buildFrameDebugInfo(), and solveDIType().

◆ solveTypeName()

static StringRef solveTypeName ( Type *  Ty)
static

Create name for Type.

It uses MDString to store new created string to avoid memory leak.

Definition at line 975 of file CoroFrame.cpp.

References llvm::MDString::get(), llvm::Type::getContext(), llvm::Type::getNonOpaquePointerElementType(), llvm::Type::getStructName(), llvm::Type::isDoubleTy(), llvm::Type::isFloatingPointTy(), llvm::Type::isFloatTy(), llvm::Type::isIntegerTy(), llvm::Type::isStructTy(), Name, OS, solveTypeName(), llvm::SmallString< InternalLen >::str(), and llvm::Twine::toStringRef().

Referenced by solveDIType(), and solveTypeName().

◆ splitAround()

static void splitAround ( Instruction *  I,
const Twine &  Name 
)
static

Definition at line 2351 of file CoroFrame.cpp.

References I, Name, and splitBlockIfNotFirst().

Referenced by llvm::coro::buildCoroutineFrame().

◆ splitBeforeCatchSwitch()

static Instruction * splitBeforeCatchSwitch ( CatchSwitchInst *  CatchSwitch)
static

Definition at line 1681 of file CoroFrame.cpp.

References llvm::CleanupReturnInst::Create(), llvm::CleanupPadInst::Create(), llvm::Instruction::eraseFromParent(), llvm::Instruction::getParent(), llvm::CatchSwitchInst::getParentPad(), llvm::BasicBlock::getTerminator(), and llvm::BasicBlock::splitBasicBlock().

Referenced by insertSpills().

◆ splitBlockIfNotFirst()

static BasicBlock * splitBlockIfNotFirst ( Instruction *  I,
const Twine &  Name 
)
static

Definition at line 2338 of file CoroFrame.cpp.

References llvm::BasicBlock::front(), llvm::BasicBlock::getSinglePredecessor(), I, Name, llvm::Value::setName(), and llvm::BasicBlock::splitBasicBlock().

Referenced by splitAround().

◆ willLeaveFunctionImmediatelyAfter()

static bool willLeaveFunctionImmediatelyAfter ( BasicBlock *  BB,
unsigned  depth = 3 
)
static

After we split the coroutine, will the given basic block be along an obvious exit path for the resumption function?

Definition at line 2401 of file CoroFrame.cpp.

References isSuspendBlock(), llvm::successors(), and willLeaveFunctionImmediatelyAfter().

Referenced by localAllocaNeedsStackSave(), and willLeaveFunctionImmediatelyAfter().

Generated on Wed May 31 2023 14:41:57 for LLVM by doxygen 1.9.6