#ifndef LLVM_IR_FUNCTION_H
#define LLVM_IR_FUNCTION_H
+#include "llvm/ADT/iterator_range.h"
+#include "llvm/ADT/Optional.h"
#include "llvm/IR/Argument.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/CallingConv.h"
-#include "llvm/IR/GlobalValue.h"
+#include "llvm/IR/GlobalObject.h"
+#include "llvm/IR/OperandTraits.h"
#include "llvm/Support/Compiler.h"
namespace llvm {
class FunctionType;
class LLVMContext;
+class DISubprogram;
-// Traits for intrusive list of basic blocks...
-template<> struct ilist_traits<BasicBlock>
- : public SymbolTableListTraits<BasicBlock, Function> {
+template <>
+struct SymbolTableListSentinelTraits<Argument>
+ : public ilist_half_embedded_sentinel_traits<Argument> {};
- // createSentinel is used to get hold of the node that marks the end of the
- // list... (same trick used here as in ilist_traits<Instruction>)
- BasicBlock *createSentinel() const {
- return static_cast<BasicBlock*>(&Sentinel);
- }
- static void destroySentinel(BasicBlock*) {}
-
- BasicBlock *provideInitialHead() const { return createSentinel(); }
- BasicBlock *ensureHead(BasicBlock*) const { return createSentinel(); }
- static void noteHead(BasicBlock*, BasicBlock*) {}
-
- static ValueSymbolTable *getSymTab(Function *ItemParent);
-private:
- mutable ilist_half_node<BasicBlock> Sentinel;
-};
-
-template<> struct ilist_traits<Argument>
- : public SymbolTableListTraits<Argument, Function> {
-
- Argument *createSentinel() const {
- return static_cast<Argument*>(&Sentinel);
- }
- static void destroySentinel(Argument*) {}
-
- Argument *provideInitialHead() const { return createSentinel(); }
- Argument *ensureHead(Argument*) const { return createSentinel(); }
- static void noteHead(Argument*, Argument*) {}
-
- static ValueSymbolTable *getSymTab(Function *ItemParent);
-private:
- mutable ilist_half_node<Argument> Sentinel;
-};
-
-class Function : public GlobalValue,
- public ilist_node<Function> {
+class Function : public GlobalObject, public ilist_node<Function> {
public:
- typedef
iplist<Argument> ArgumentListType;
- typedef iplist<BasicBlock> BasicBlockListType;
+ typedef
SymbolTableList<Argument> ArgumentListType;
+ typedef SymbolTableList<BasicBlock> BasicBlockListType;
// BasicBlock iterators...
typedef BasicBlockListType::iterator iterator;
mutable ArgumentListType ArgumentList; ///< The formal arguments
ValueSymbolTable *SymTab; ///< Symbol table of args/instructions
AttributeSet AttributeSets; ///< Parameter attributes
-
- // HasLazyArguments is stored in Value::SubclassData.
- /*bool HasLazyArguments;*/
-
- // The Calling Convention is stored in Value::SubclassData.
- /*CallingConv::ID CallingConvention;*/
-
- friend class SymbolTableListTraits<Function, Module>;
+ FunctionType *Ty;
+
+ /*
+ * Value::SubclassData
+ *
+ * bit 0 : HasLazyArguments
+ * bit 1 : HasPrefixData
+ * bit 2 : HasPrologueData
+ * bit 3 : [reserved]
+ * bits 4-13 : CallingConvention
+ * bits 14-15 : [reserved]
+ */
+
+ /// Bits from GlobalObject::GlobalObjectSubclassData.
+ enum {
+ /// Whether this function is materializable.
+ IsMaterializableBit = 1 << 0,
+ HasMetadataHashEntryBit = 1 << 1
+ };
+ void setGlobalObjectBit(unsigned Mask, bool Value) {
+ setGlobalObjectSubClassData((~Mask & getGlobalObjectSubClassData()) |
+ (Value ? Mask : 0u));
+ }
+
+ friend class SymbolTableListTraits<Function>;
void setParent(Module *parent);
/// needs it. The hasLazyArguments predicate returns true if the arg list
/// hasn't been set up yet.
bool hasLazyArguments() const {
- return getSubclassDataFromValue() & 1;
+ return getSubclassDataFromValue() & (1<<0);
}
void CheckLazyArguments() const {
if (hasLazyArguments())
}
void BuildLazyArguments() const;
- Function(const Function&) LLVM_DELETED_FUNCTION;
- void operator=(const Function&) LLVM_DELETED_FUNCTION;
-
- /// Do the actual lookup of an intrinsic ID when the query could not be
- /// answered from the cache.
- unsigned lookupIntrinsicID() const LLVM_READONLY;
+ Function(const Function&) = delete;
+ void operator=(const Function&) = delete;
/// Function ctor - If the (optional) Module argument is specified, the
/// function is automatically inserted into the end of the function list for
/// the module.
///
Function(FunctionType *Ty, LinkageTypes Linkage,
- const Twine &N = "", Module *M = 0);
+ const Twine &N = "", Module *M = nullptr);
public:
static Function *Create(FunctionType *Ty, LinkageTypes Linkage,
- const Twine &N = "", Module *M = 0) {
- return new(0) Function(Ty, Linkage, N, M);
+ const Twine &N = "", Module *M = nullptr) {
+ return new(1) Function(Ty, Linkage, N, M);
}
- ~Function();
+ ~Function() override;
+
+ /// \brief Provide fast operand accessors
+ DECLARE_TRANSPARENT_OPERAND_ACCESSORS(Value);
+
+ /// \brief Get the personality function associated with this function.
+ bool hasPersonalityFn() const { return getNumOperands() != 0; }
+ Constant *getPersonalityFn() const {
+ assert(hasPersonalityFn());
+ return cast<Constant>(Op<0>());
+ }
+ void setPersonalityFn(Constant *C);
Type *getReturnType() const; // Return the type of the ret val
FunctionType *getFunctionType() const; // Return the FunctionType for me
- /// getContext - Return a pointer to the LLVMContext associated with this
- /// function, or NULL if this function is not bound to a context yet.
+ /// getContext - Return a reference to the LLVMContext associated with this
+ /// function.
LLVMContext &getContext() const;
/// isVarArg - Return true if this function takes a variable number of
/// arguments.
bool isVarArg() const;
+ bool isMaterializable() const;
+ void setIsMaterializable(bool V);
+
/// getIntrinsicID - This method returns the ID number of the specified
/// function, or Intrinsic::not_intrinsic if the function is not an
/// intrinsic, or if the pointer is null. This value is always defined to be
/// zero to allow easy checking for whether a function is intrinsic or not.
/// The particular intrinsic functions which correspond to this value are
- /// defined in llvm/Intrinsics.h. Results are cached in the LLVM context,
- /// subsequent requests for the same ID return results much faster from the
- /// cache.
- ///
- unsigned getIntrinsicID() const LLVM_READONLY;
+ /// defined in llvm/Intrinsics.h.
+ Intrinsic::ID getIntrinsicID() const LLVM_READONLY { return IntID; }
bool isIntrinsic() const { return getName().startswith("llvm."); }
+ /// \brief Recalculate the ID for this function if it is an Intrinsic defined
+ /// in llvm/Intrinsics.h. Sets the intrinsic ID to Intrinsic::not_intrinsic
+ /// if the name of this function does not match an intrinsic in that header.
+ /// Note, this method does not need to be called directly, as it is called
+ /// from Value::setName() whenever the name of this function changes.
+ void recalculateIntrinsicID();
+
/// getCallingConv()/setCallingConv(CC) - These method get and set the
/// calling convention of this function. The enum values for the known
/// calling conventions are defined in CallingConv.h.
CallingConv::ID getCallingConv() const {
- return static_cast<CallingConv::ID>(getSubclassDataFromValue() >> 1);
+ return static_cast<CallingConv::ID>((getSubclassDataFromValue() >> 4) &
+ CallingConv::MaxID);
}
void setCallingConv(CallingConv::ID CC) {
- setValueSubclassData((getSubclassDataFromValue() & 1) |
- (static_cast<unsigned>(CC) << 1));
+ auto ID = static_cast<unsigned>(CC);
+ assert(!(ID & ~CallingConv::MaxID) && "Unsupported calling convention");
+ setValueSubclassData((getSubclassDataFromValue() & 0xc00f) | (ID << 4));
}
- /// getAttributes - Return the attribute list for this Function.
- ///
+ /// @brief Return the attribute list for this Function.
AttributeSet getAttributes() const { return AttributeSets; }
- /// setAttributes - Set the attribute list for this Function.
- ///
+ /// @brief Set the attribute list for this Function.
void setAttributes(AttributeSet attrs) { AttributeSets = attrs; }
- /// addFnAttr - Add function attributes to this function.
- ///
+ /// @brief Add function attributes to this function.
void addFnAttr(Attribute::AttrKind N) {
setAttributes(AttributeSets.addAttribute(getContext(),
AttributeSet::FunctionIndex, N));
}
- /// removeFnAttr - Remove function attributes from this function.
- ///
+ /// @brief Remove function attributes from this function.
void removeFnAttr(Attribute::AttrKind N) {
setAttributes(AttributeSets.removeAttribute(
getContext(), AttributeSet::FunctionIndex, N));
}
- /// addFnAttr - Add function attributes to this function.
- ///
+ /// @brief Add function attributes to this function.
void addFnAttr(StringRef Kind) {
setAttributes(
AttributeSets.addAttribute(getContext(),
AttributeSet::FunctionIndex, Kind));
}
+ void addFnAttr(StringRef Kind, StringRef Value) {
+ setAttributes(
+ AttributeSets.addAttribute(getContext(),
+ AttributeSet::FunctionIndex, Kind, Value));
+ }
+
+ /// Set the entry count for this function.
+ void setEntryCount(uint64_t Count);
- /// \brief Return true if the function has the attribute.
+ /// Get the entry count for this function.
+ Optional<uint64_t> getEntryCount() const;
+
+ /// @brief Return true if the function has the attribute.
bool hasFnAttribute(Attribute::AttrKind Kind) const {
return AttributeSets.hasAttribute(AttributeSet::FunctionIndex, Kind);
}
return AttributeSets.hasAttribute(AttributeSet::FunctionIndex, Kind);
}
+ /// @brief Return the attribute for the given attribute kind.
+ Attribute getFnAttribute(Attribute::AttrKind Kind) const {
+ return AttributeSets.getAttribute(AttributeSet::FunctionIndex, Kind);
+ }
+ Attribute getFnAttribute(StringRef Kind) const {
+ return AttributeSets.getAttribute(AttributeSet::FunctionIndex, Kind);
+ }
+
+ /// \brief Return the stack alignment for the function.
+ unsigned getFnStackAlignment() const {
+ return AttributeSets.getStackAlignment(AttributeSet::FunctionIndex);
+ }
+
/// hasGC/getGC/setGC/clearGC - The name of the garbage collection algorithm
/// to use during code generation.
bool hasGC() const;
/// @brief removes the attributes from the list of attributes.
void removeAttributes(unsigned i, AttributeSet attr);
+ /// @brief adds the dereferenceable attribute to the list of attributes.
+ void addDereferenceableAttr(unsigned i, uint64_t Bytes);
+
+ /// @brief adds the dereferenceable_or_null attribute to the list of
+ /// attributes.
+ void addDereferenceableOrNullAttr(unsigned i, uint64_t Bytes);
+
/// @brief Extract the alignment for a call or parameter (0=unknown).
unsigned getParamAlignment(unsigned i) const {
return AttributeSets.getParamAlignment(i);
}
+ /// @brief Extract the number of dereferenceable bytes for a call or
+ /// parameter (0=unknown).
+ uint64_t getDereferenceableBytes(unsigned i) const {
+ return AttributeSets.getDereferenceableBytes(i);
+ }
+
+ /// @brief Extract the number of dereferenceable_or_null bytes for a call or
+ /// parameter (0=unknown).
+ uint64_t getDereferenceableOrNullBytes(unsigned i) const {
+ return AttributeSets.getDereferenceableOrNullBytes(i);
+ }
+
/// @brief Determine if the function does not access memory.
bool doesNotAccessMemory() const {
return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
addFnAttr(Attribute::ReadOnly);
}
+ /// @brief Determine if the call can access memmory only using pointers based
+ /// on its arguments.
+ bool onlyAccessesArgMemory() const {
+ return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
+ Attribute::ArgMemOnly);
+ }
+ void setOnlyAccessesArgMemory() { addFnAttr(Attribute::ArgMemOnly); }
+
/// @brief Determine if the function cannot return.
bool doesNotReturn() const {
return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
addFnAttr(Attribute::NoDuplicate);
}
+ /// @brief Determine if the call is convergent.
+ bool isConvergent() const {
+ return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
+ Attribute::Convergent);
+ }
+ void setConvergent() {
+ addFnAttr(Attribute::Convergent);
+ }
+
+
/// @brief True if the ABI mandates (or the user requested) that this
/// function be in a unwind table.
bool hasUWTable() const {
/// @brief Determine if the function returns a structure through first
/// pointer argument.
bool hasStructRetAttr() const {
- return AttributeSets.hasAttribute(1, Attribute::StructRet);
+ return AttributeSets.hasAttribute(1, Attribute::StructRet) ||
+ AttributeSets.hasAttribute(2, Attribute::StructRet);
}
- /// @brief Determine if the parameter does not alias other parameters.
+ /// @brief Determine if the parameter or return value is marked with NoAlias
+ /// attribute.
/// @param n The parameter to check. 1 is the first parameter, 0 is the return
bool doesNotAlias(unsigned n) const {
return AttributeSets.hasAttribute(n, Attribute::NoAlias);
addAttribute(n, Attribute::NoCapture);
}
+ bool doesNotAccessMemory(unsigned n) const {
+ return AttributeSets.hasAttribute(n, Attribute::ReadNone);
+ }
+ void setDoesNotAccessMemory(unsigned n) {
+ addAttribute(n, Attribute::ReadNone);
+ }
+
+ bool onlyReadsMemory(unsigned n) const {
+ return doesNotAccessMemory(n) ||
+ AttributeSets.hasAttribute(n, Attribute::ReadOnly);
+ }
+ void setOnlyReadsMemory(unsigned n) {
+ addAttribute(n, Attribute::ReadOnly);
+ }
+
+ /// Optimize this function for minimum size (-Oz).
+ bool optForMinSize() const { return hasFnAttribute(Attribute::MinSize); };
+
+ /// Optimize this function for size (-Os) or minimum size (-Oz).
+ bool optForSize() const {
+ return hasFnAttribute(Attribute::OptimizeForSize) || optForMinSize();
+ }
+
/// copyAttributesFrom - copy all additional attributes (those not needed to
/// create a Function) from the Function Src to this one.
- void copyAttributesFrom(const GlobalValue *Src);
+ void copyAttributesFrom(const GlobalValue *Src) override;
/// deleteBody - This method deletes the body of the function, and converts
/// the linkage to external.
/// removeFromParent - This method unlinks 'this' from the containing module,
/// but does not delete it.
///
- virtual void removeFromParent();
+ void removeFromParent() override;
/// eraseFromParent - This method unlinks 'this' from the containing module
/// and deletes it.
///
- virtual void eraseFromParent();
-
+ void eraseFromParent() override;
/// Get the underlying elements of the Function... the basic block list is
/// empty for external functions.
CheckLazyArguments();
return ArgumentList;
}
- static iplist<Argument> Function::*getSublistAccess(Argument*) {
+ static ArgumentListType Function::*getSublistAccess(Argument*) {
return &Function::ArgumentList;
}
const BasicBlockListType &getBasicBlockList() const { return BasicBlocks; }
BasicBlockListType &getBasicBlockList() { return BasicBlocks; }
- static iplist<BasicBlock> Function::*getSublistAccess(BasicBlock*) {
+ static BasicBlockListType Function::*getSublistAccess(BasicBlock*) {
return &Function::BasicBlocks;
}
inline ValueSymbolTable &getValueSymbolTable() { return *SymTab; }
inline const ValueSymbolTable &getValueSymbolTable() const { return *SymTab; }
-
//===--------------------------------------------------------------------===//
// BasicBlock iterator forwarding functions
//
const BasicBlock &back() const { return BasicBlocks.back(); }
BasicBlock &back() { return BasicBlocks.back(); }
- //===--------------------------------------------------------------------===//
- // Argument iterator forwarding functions
- //
+/// @name Function Argument Iteration
+/// @{
+
arg_iterator arg_begin() {
CheckLazyArguments();
return ArgumentList.begin();
return ArgumentList.end();
}
+ iterator_range<arg_iterator> args() {
+ return iterator_range<arg_iterator>(arg_begin(), arg_end());
+ }
+
+ iterator_range<const_arg_iterator> args() const {
+ return iterator_range<const_arg_iterator>(arg_begin(), arg_end());
+ }
+
+/// @}
+
size_t arg_size() const;
bool arg_empty() const;
+ bool hasPrefixData() const {
+ return getSubclassDataFromValue() & (1<<1);
+ }
+
+ Constant *getPrefixData() const;
+ void setPrefixData(Constant *PrefixData);
+
+ bool hasPrologueData() const {
+ return getSubclassDataFromValue() & (1<<2);
+ }
+
+ Constant *getPrologueData() const;
+ void setPrologueData(Constant *PrologueData);
+
/// viewCFG - This function is meant for use from the debugger. You can just
/// say 'call F->viewCFG()' and a ghostview window should pop up from the
/// program, displaying the CFG of the current function with the code for each
/// other than direct calls or invokes to it, or blockaddress expressions.
/// Optionally passes back an offending user for diagnostic purposes.
///
- bool hasAddressTaken(const User** = 0) const;
+ bool hasAddressTaken(const User** = nullptr) const;
/// isDefTriviallyDead - Return true if it is trivially safe to remove
/// this function definition from the module (because it isn't externally
/// setjmp or other function that gcc recognizes as "returning twice".
bool callsFunctionThatReturnsTwice() const;
+ /// \brief Check if this has any metadata.
+ bool hasMetadata() const { return hasMetadataHashEntry(); }
+
+ /// \brief Get the current metadata attachment, if any.
+ ///
+ /// Returns \c nullptr if such an attachment is missing.
+ /// @{
+ MDNode *getMetadata(unsigned KindID) const;
+ MDNode *getMetadata(StringRef Kind) const;
+ /// @}
+
+ /// \brief Set a particular kind of metadata attachment.
+ ///
+ /// Sets the given attachment to \c MD, erasing it if \c MD is \c nullptr or
+ /// replacing it if it already exists.
+ /// @{
+ void setMetadata(unsigned KindID, MDNode *MD);
+ void setMetadata(StringRef Kind, MDNode *MD);
+ /// @}
+
+ /// \brief Get all current metadata attachments.
+ void
+ getAllMetadata(SmallVectorImpl<std::pair<unsigned, MDNode *>> &MDs) const;
+
+ /// \brief Drop metadata not in the given list.
+ ///
+ /// Drop all metadata from \c this not included in \c KnownIDs.
+ void dropUnknownMetadata(ArrayRef<unsigned> KnownIDs);
+
+ /// \brief Set the attached subprogram.
+ ///
+ /// Calls \a setMetadata() with \a LLVMContext::MD_dbg.
+ void setSubprogram(DISubprogram *SP);
+
+ /// \brief Get the attached subprogram.
+ ///
+ /// Calls \a getMetadata() with \a LLVMContext::MD_dbg and casts the result
+ /// to \a DISubprogram.
+ DISubprogram *getSubprogram() const;
+
private:
// Shadow Value::setValueSubclassData with a private forwarding method so that
// subclasses cannot accidentally use it.
void setValueSubclassData(unsigned short D) {
Value::setValueSubclassData(D);
}
+
+ bool hasMetadataHashEntry() const {
+ return getGlobalObjectSubClassData() & HasMetadataHashEntryBit;
+ }
+ void setHasMetadataHashEntry(bool HasEntry) {
+ setGlobalObjectBit(HasMetadataHashEntryBit, HasEntry);
+ }
+
+ void clearMetadata();
};
-inline ValueSymbolTable *
-ilist_traits<BasicBlock>::getSymTab(Function *F) {
- return F ? &F->getValueSymbolTable() : 0;
-}
+template <>
+struct OperandTraits<Function> : public OptionalOperandTraits<Function> {};
-inline ValueSymbolTable *
-ilist_traits<Argument>::getSymTab(Function *F) {
- return F ? &F->getValueSymbolTable() : 0;
-}
+DEFINE_TRANSPARENT_OPERAND_ACCESSORS(Function, Value)
} // End llvm namespace
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