CoroFrame.cpp File Reference

#include "CoroInternal.h"
#include "llvm/ADT/ScopeExit.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Analysis/StackLifetime.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/IR/Module.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/OptimizedStructLayout.h"
#include "llvm/Transforms/Coroutines/ABI.h"
#include "llvm/Transforms/Coroutines/CoroInstr.h"
#include "llvm/Transforms/Coroutines/MaterializationUtils.h"
#include "llvm/Transforms/Coroutines/SpillUtils.h"
#include "llvm/Transforms/Coroutines/SuspendCrossingInfo.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/Transforms/Utils/PromoteMemToReg.h"
#include <algorithm>
#include <optional>

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "coro-frame"

Functions
static void	dumpSpills (StringRef Title, const coro::SpillInfo &Spills)
static void	dumpAllocas (const SmallVectorImpl< coro::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, bool OptimizeFrame)
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 BasicBlock *	splitBlockIfNotFirst (Instruction *I, const Twine &Name)
static void	splitAround (Instruction *I, const Twine &Name)
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 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	sinkLifetimeStartMarkers (Function &F, coro::Shape &Shape, SuspendCrossingInfo &Checker, const DominatorTree &DT)
	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 std::optional< std::pair< Value &, DIExpression & > >	salvageDebugInfoImpl (SmallDenseMap< Argument *, AllocaInst *, 4 > &ArgToAllocaMap, bool UseEntryValue, Function *F, Value *Storage, DIExpression *Expr, bool SkipOutermostLoad)

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "coro-frame"

Definition at line 45 of file CoroFrame.cpp.

Function Documentation

buildFrameDebugInfo()

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 687 of file CoroFrame.cpp.

References llvm::coro::Shape::ABI, assert(), cacheDIVar(), llvm::DIBuilder::createAutoVariable(), llvm::DIBuilder::createBasicType(), llvm::DIBuilder::createExpression(), llvm::DIBuilder::createMemberType(), llvm::DIBuilder::createPointerType(), llvm::DIBuilder::createStructType(), llvm::DbgVariableRecord::Declare, llvm::coro::Shape::SwitchFieldIndex::Destroy, llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::end(), F, llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::find(), llvm::coro::Shape::FrameAlign, llvm::coro::Shape::FramePtr, llvm::coro::Shape::FrameSize, llvm::coro::Shape::FrameTy, llvm::DICompileUnit::FullDebug, llvm::MDNode::get(), llvm::MDTuple::get(), llvm::ValueAsMetadata::get(), llvm::MDNode::getContext(), llvm::StructType::getElementType(), llvm::DIScope::getFile(), llvm::details::FixedOrScalableQuantity< LeafTy, ValueTy >::getFixedValue(), llvm::coro::Shape::getInsertPtAfterFramePtr(), llvm::DIType::getName(), llvm::StructType::getNumElements(), llvm::DIBuilder::getOrCreateArray(), llvm::DataLayout::getTypeSizeInBits(), 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::SmallVectorTemplateBase< T, bool >::push_back(), llvm::DIBuilder::replaceArrays(), llvm::MDNode::replaceOperandWith(), llvm::coro::Shape::SwitchFieldIndex::Resume, solveDIType(), llvm::StringRef::str(), llvm::Twine::str(), llvm::coro::Switch, llvm::coro::Shape::SwitchLowering, and llvm::Align::value().

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

buildFrameType()

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

static

Definition at line 855 of file CoroFrame.cpp.

References A(), llvm::coro::Shape::ABI, llvm::alignTo(), assert(), llvm::coro::Async, llvm::coro::Shape::AsyncLowering, B(), llvm::CallingConv::C, llvm::coro::Shape::AsyncLoweringStorage::ContextHeaderSize, llvm::coro::Shape::AsyncLoweringStorage::ContextSize, llvm::coro::Shape::CoroSuspends, DL, llvm::dyn_cast(), F, llvm::coro::Shape::FrameAlign, llvm::coro::Shape::AsyncLoweringStorage::FrameOffset, llvm::coro::Shape::FrameSize, llvm::coro::Shape::AsyncLoweringStorage::getContextAlignment(), llvm::Type::getIntNTy(), llvm::coro::Shape::getPromiseAlloca(), llvm::coro::Shape::getRetconCoroId(), llvm::PointerType::getUnqual(), llvm::coro::Shape::SwitchLoweringStorage::IndexAlign, llvm::coro::Shape::SwitchLoweringStorage::IndexField, llvm::coro::Shape::SwitchLoweringStorage::IndexOffset, llvm::coro::Shape::RetconLoweringStorage::IsFrameInlineInStorage, llvm::Log2_64_Ceil(), llvm::report_fatal_error(), llvm::coro::Retcon, llvm::coro::Shape::RetconLowering, llvm::coro::RetconOnce, llvm::coro::Switch, and llvm::coro::Shape::SwitchLowering.

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

cacheDIVar()

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

static

Definition at line 543 of file CoroFrame.cpp.

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

Referenced by buildFrameDebugInfo().

cleanupSinglePredPHIs()

void cleanupSinglePredPHIs ( Function & F )

static

Definition at line 1394 of file CoroFrame.cpp.

References llvm::SmallVectorTemplateCommon< T, typename >::empty(), F, llvm::SmallVectorImpl< T >::pop_back_val(), and llvm::SmallVectorTemplateBase< T, bool >::push_back().

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

dumpAllocas()

void dumpAllocas ( const SmallVectorImpl< coro::AllocaInfo > & Allocas )

static

Definition at line 149 of file CoroFrame.cpp.

References A(), and llvm::dbgs().

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

dumpSpills()

void dumpSpills ( StringRef Title, const coro::SpillInfo & Spills )

static

Definition at line 139 of file CoroFrame.cpp.

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

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

eliminateSwiftError()

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 1724 of file CoroFrame.cpp.

References llvm::dyn_cast(), eliminateSwiftErrorAlloca(), eliminateSwiftErrorArgument(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), F, llvm::AllocaInst::isSwiftError(), llvm::PromoteMemToReg(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::AllocaInst::setSwiftError().

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

eliminateSwiftErrorAlloca()

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 1660 of file CoroFrame.cpp.

References assert(), Call, llvm::cast(), emitSetAndGetSwiftErrorValueAround(), F, llvm::Use::getUser(), llvm::isa(), llvm::isAllocaPromotable(), llvm::make_early_inc_range(), llvm::Use::set(), and llvm::Value::uses().

Referenced by eliminateSwiftError(), and eliminateSwiftErrorArgument().

eliminateSwiftErrorArgument()

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 1686 of file CoroFrame.cpp.

References llvm::cast(), llvm::coro::Shape::CoroEnds, llvm::coro::Shape::CoroSuspends, eliminateSwiftErrorAlloca(), emitSetAndGetSwiftErrorValueAround(), emitSetSwiftErrorValue(), F, llvm::Constant::getNullValue(), llvm::Value::getType(), llvm::PointerType::getUnqual(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::Value::replaceAllUsesWith().

Referenced by eliminateSwiftError().

emitGetSwiftErrorValue()

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

static

Get the current swifterror value.

Definition at line 1597 of file CoroFrame.cpp.

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

Referenced by emitSetAndGetSwiftErrorValueAround().

emitSetAndGetSwiftErrorValueAround()

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 1630 of file CoroFrame.cpp.

References Call, llvm::cast(), emitGetSwiftErrorValue(), emitSetSwiftErrorValue(), llvm::AllocaInst::getAllocatedType(), and llvm::isa().

Referenced by eliminateSwiftErrorAlloca(), and eliminateSwiftErrorArgument().

emitSetSwiftErrorValue()

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 1612 of file CoroFrame.cpp.

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

Referenced by eliminateSwiftErrorArgument(), and emitSetAndGetSwiftErrorValueAround().

insertSpills()

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

static

Definition at line 998 of file CoroFrame.cpp.

References A(), llvm::coro::Shape::ABI, llvm::coro::Shape::AllocaSpillBlock, llvm::any_of(), assert(), llvm::coro::Async, llvm::BasicBlock::begin(), llvm::CallingConv::C, llvm::cast(), llvm::SmallVectorImpl< T >::clear(), llvm::coro::Shape::CoroBegin, llvm::Count, llvm::DbgVariableRecord::Declare, llvm::DominatorTree::dominates(), llvm::dyn_cast(), E(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), llvm::TinyPtrVector< EltTy >::empty(), llvm::Instruction::eraseFromParent(), F, llvm::filterDbgVars(), llvm::findDbgUsers(), llvm::findDVRDeclares(), llvm::for_each(), FramePtr, llvm::coro::Shape::FramePtr, llvm::coro::Shape::FrameTy, G, GEP, llvm::IntegerType::get(), llvm::ValueAsMetadata::get(), llvm::AllocaInst::getAlign(), llvm::AllocaInst::getAllocatedType(), llvm::AllocaInst::getArraySize(), llvm::Value::getContext(), llvm::Module::getDataLayout(), llvm::StructType::getElementType(), llvm::BasicBlock::getFirstInsertionPt(), llvm::Instruction::getFunction(), llvm::coro::Shape::getInsertPtAfterFramePtr(), llvm::Type::getInt32Ty(), llvm::DataLayout::getIntPtrType(), llvm::Instruction::getModule(), llvm::Value::getName(), llvm::BasicBlock::getParent(), llvm::coro::getSpillInsertionPt(), llvm::AllocaInst::getType(), I, llvm::isa(), llvm::AllocaInst::isArrayAllocation(), llvm::make_early_inc_range(), P, llvm::coro::Shape::SwitchLoweringStorage::PromiseAlloca, llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::Value::replaceAllUsesWith(), llvm::report_fatal_error(), llvm::coro::Retcon, llvm::coro::RetconOnce, llvm::coro::salvageDebugInfo(), llvm::BasicBlock::splitBasicBlock(), llvm::coro::Switch, llvm::coro::Shape::SwitchLowering, llvm::Value::users(), llvm::Value::uses(), and llvm::Align::value().

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

localAllocaNeedsStackSave()

bool localAllocaNeedsStackSave ( CoroAllocaAllocInst * AI )

static

Definition at line 1541 of file CoroFrame.cpp.

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

Referenced by lowerLocalAllocas().

lowerLocalAllocas()

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 1559 of file CoroFrame.cpp.

References llvm::cast(), llvm::isa(), localAllocaNeedsStackSave(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::AllocaInst::setAlignment(), and llvm::Value::users().

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

movePHIValuesToInsertedBlock()

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

static

Definition at line 1301 of file CoroFrame.cpp.

References llvm::PHINode::addIncoming(), llvm::BasicBlock::begin(), llvm::cast(), llvm::PHINode::Create(), llvm::dyn_cast(), llvm::BasicBlock::front(), llvm::Value::getName(), and llvm::Instruction::insertBefore().

Referenced by rewritePHIs(), and rewritePHIsForCleanupPad().

rewritePHIs() [1/2]

void rewritePHIs ( BasicBlock & BB )

static

Definition at line 1411 of file CoroFrame.cpp.

References assert(), llvm::PHINode::Create(), llvm::dyn_cast(), llvm::dyn_cast_or_null(), llvm::ehAwareSplitEdge(), llvm::BasicBlock::empty(), llvm::Instruction::eraseFromParent(), llvm::BasicBlock::getFirstNonPHIIt(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::Value::getName(), llvm::Value::getType(), llvm::Instruction::insertBefore(), movePHIValuesToInsertedBlock(), llvm::predecessors(), llvm::Value::replaceAllUsesWith(), rewritePHIsForCleanupPad(), and llvm::Value::takeName().

rewritePHIs() [2/2]

void rewritePHIs ( Function & F )

static

Definition at line 1487 of file CoroFrame.cpp.

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

rewritePHIsForCleanupPad()

void rewritePHIsForCleanupPad ( BasicBlock * CleanupPadBB, CleanupPadInst * CleanupPad )

static

Definition at line 1319 of file CoroFrame.cpp.

References llvm::BasicBlock::Create(), 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().

salvageDebugInfoImpl()

std::optional< std::pair< Value &, DIExpression & > > salvageDebugInfoImpl ( SmallDenseMap< Argument *, AllocaInst *, 4 > & ArgToAllocaMap, bool UseEntryValue, Function * F, Value * Storage, DIExpression * Expr, bool SkipOutermostLoad )

static

Definition at line 1839 of file CoroFrame.cpp.

References AbstractManglingParser< Derived, Alloc >::Ops, llvm::DIExpression::appendOpsToArg(), llvm::DIExpression::DerefBefore, llvm::dyn_cast(), llvm::dyn_cast_or_null(), llvm::SmallVectorTemplateCommon< T, typename >::empty(), llvm::DIExpression::EntryValue, F, llvm::DIExpression::foldConstantMath(), llvm::Value::getName(), llvm::DIExpression::getNumLocationOperands(), llvm::Value::getType(), llvm::isa(), llvm::DIExpression::isEntryValue(), llvm::DIExpression::isSingleLocationExpression(), llvm::DIExpression::prepend(), and llvm::salvageDebugInfoImpl().

sinkLifetimeStartMarkers()

void sinkLifetimeStartMarkers ( Function & F, coro::Shape & Shape, SuspendCrossingInfo & Checker, const DominatorTree & DT )

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 1759 of file CoroFrame.cpp.

References assert(), llvm::cast(), llvm::coro::Shape::CoroSuspends, llvm::DominatorTree::dominates(), llvm::dyn_cast(), F, llvm::BasicBlock::getParent(), llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), llvm::BasicBlock::getSingleSuccessor(), I, II, llvm::SmallPtrSetImpl< PtrType >::insert(), instructions, llvm::SuspendCrossingInfo::isDefinitionAcrossSuspend(), isLifetimeStart(), llvm::coro::isSuspendBlock(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallVectorTemplateCommon< T, typename >::size(), and llvm::Value::users().

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

solveDIType()

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

static

Definition at line 600 of file CoroFrame.cpp.

References assert(), llvm::BitWidth, llvm::cast(), llvm::dbgs(), llvm::DataLayout::getABITypeAlign(), llvm::DIType::getAlignInBits(), llvm::StructLayout::getElementOffsetInBits(), llvm::TypeSize::getFixed(), 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_DEBUG, llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::lookup(), Size, solveDIType(), solveTypeName(), and llvm::Align::value().

Referenced by buildFrameDebugInfo(), and solveDIType().

solveTypeName()

StringRef solveTypeName ( Type * Ty )

static

Create name for Type.

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

Definition at line 562 of file CoroFrame.cpp.

References llvm::cast(), llvm::MDString::get(), llvm::raw_svector_ostream::str(), and llvm::SmallString< InternalLen >::str().

Referenced by solveDIType().

splitAround()

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

static

Definition at line 1514 of file CoroFrame.cpp.

References I, and splitBlockIfNotFirst().

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

splitBlockIfNotFirst()

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

static

Definition at line 1501 of file CoroFrame.cpp.

References I.

Referenced by splitAround().

willLeaveFunctionImmediatelyAfter()

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 1521 of file CoroFrame.cpp.

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

Referenced by localAllocaNeedsStackSave(), and willLeaveFunctionImmediatelyAfter().