#ifndef LLVM_IR_FUNCTION_H
#define LLVM_IR_FUNCTION_H
+#include "llvm/ADT/iterator_range.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/Support/Compiler.h"
namespace llvm {
class FunctionType;
+class GCStrategy;
class LLVMContext;
// Traits for intrusive list of basic blocks...
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;
BasicBlockListType BasicBlocks; ///< The basic blocks
mutable ArgumentListType ArgumentList; ///< The formal arguments
ValueSymbolTable *SymTab; ///< Symbol table of args/instructions
- AttributeSet AttributeList; ///< Parameter attributes
+ AttributeSet AttributeSets; ///< Parameter attributes
- // HasLazyArguments is stored in Value::SubclassData.
- /*bool HasLazyArguments;*/
-
- // The Calling Convention is stored in Value::SubclassData.
- /*CallingConv::ID CallingConvention;*/
+ /*
+ * Value::SubclassData
+ *
+ * bit 0 : HasLazyArguments
+ * bit 1 : HasPrefixData
+ * bit 2 : HasPrologueData
+ * bit 3-6: CallingConvention
+ */
friend class SymbolTableListTraits<Function, Module>;
/// 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())
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 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) {
+ const Twine &N = "", Module *M = nullptr) {
return new(0) Function(Ty, Linkage, N, M);
}
/// 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
- /// instrinsic, or if the pointer is null. This value is always defined to be
+ /// 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.
+ /// 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;
bool isIntrinsic() const { return getName().startswith("llvm."); }
/// 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() >> 3);
}
void setCallingConv(CallingConv::ID CC) {
- setValueSubclassData((getSubclassDataFromValue() & 1) |
- (static_cast<unsigned>(CC) << 1));
+ setValueSubclassData((getSubclassDataFromValue() & 7) |
+ (static_cast<unsigned>(CC) << 3));
}
- /// getAttributes - Return the attribute list for this Function.
- ///
- const AttributeSet &getAttributes() const { return AttributeList; }
+ /// @brief Return the attribute list for this Function.
+ AttributeSet getAttributes() const { return AttributeSets; }
- /// setAttributes - Set the attribute list for this Function.
- ///
- void setAttributes(const AttributeSet &attrs) { AttributeList = attrs; }
+ /// @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) {
- // Function Attribute are stored at ~0 index
- addAttribute(AttributeSet::FunctionIndex, Attribute::get(getContext(), N));
+ setAttributes(AttributeSets.addAttribute(getContext(),
+ AttributeSet::FunctionIndex, N));
}
- /// removeFnAttr - Remove function attributes from this function.
- ///
- void removeFnAttr(Attribute N) {
- // Function Attribute are stored at ~0 index
- removeAttribute(~0U, N);
+ /// @brief Remove function attributes from this function.
+ void removeFnAttr(Attribute::AttrKind N) {
+ setAttributes(AttributeSets.removeAttribute(
+ getContext(), AttributeSet::FunctionIndex, N));
+ }
+
+ /// @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));
+ }
+
+ /// @brief Return true if the function has the attribute.
+ bool hasFnAttribute(Attribute::AttrKind Kind) const {
+ return AttributeSets.hasAttribute(AttributeSet::FunctionIndex, Kind);
+ }
+ bool hasFnAttribute(StringRef Kind) const {
+ 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);
}
/// hasGC/getGC/setGC/clearGC - The name of the garbage collection algorithm
void setGC(const char *Str);
void clearGC();
- /// addAttribute - adds the attribute to the list of attributes.
- void addAttribute(unsigned i, Attribute attr);
+ /// Returns the GCStrategy associated with the specified garbage collector
+ /// algorithm or nullptr if one is not set.
+ GCStrategy *getGCStrategy() const;
+
+ /// @brief adds the attribute to the list of attributes.
+ void addAttribute(unsigned i, Attribute::AttrKind attr);
+
+ /// @brief adds the attributes to the list of attributes.
+ void addAttributes(unsigned i, AttributeSet attrs);
- /// removeAttribute - removes the attribute from the list of attributes.
- void removeAttribute(unsigned i, Attribute attr);
+ /// @brief removes the attributes from the list of attributes.
+ void removeAttributes(unsigned i, AttributeSet attr);
/// @brief Extract the alignment for a call or parameter (0=unknown).
unsigned getParamAlignment(unsigned i) const {
- return AttributeList.getParamAlignment(i);
+ 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 Determine if the function does not access memory.
bool doesNotAccessMemory() const {
- return AttributeList.hasAttribute(AttributeSet::FunctionIndex,
+ return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
Attribute::ReadNone);
}
void setDoesNotAccessMemory() {
/// @brief Determine if the function does not access or only reads memory.
bool onlyReadsMemory() const {
return doesNotAccessMemory() ||
- AttributeList.hasAttribute(AttributeSet::FunctionIndex,
+ AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
Attribute::ReadOnly);
}
void setOnlyReadsMemory() {
/// @brief Determine if the function cannot return.
bool doesNotReturn() const {
- return AttributeList.hasAttribute(AttributeSet::FunctionIndex,
+ return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
Attribute::NoReturn);
}
void setDoesNotReturn() {
/// @brief Determine if the function cannot unwind.
bool doesNotThrow() const {
- return AttributeList.hasAttribute(AttributeSet::FunctionIndex,
+ return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
Attribute::NoUnwind);
}
void setDoesNotThrow() {
/// @brief Determine if the call cannot be duplicated.
bool cannotDuplicate() const {
- return AttributeList.hasAttribute(AttributeSet::FunctionIndex,
+ return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
Attribute::NoDuplicate);
}
void setCannotDuplicate() {
/// @brief True if the ABI mandates (or the user requested) that this
/// function be in a unwind table.
bool hasUWTable() const {
- return AttributeList.hasAttribute(AttributeSet::FunctionIndex,
+ return AttributeSets.hasAttribute(AttributeSet::FunctionIndex,
Attribute::UWTable);
}
void setHasUWTable() {
/// @brief Determine if the function returns a structure through first
/// pointer argument.
bool hasStructRetAttr() const {
- return AttributeList.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.
/// @param n The parameter to check. 1 is the first parameter, 0 is the return
bool doesNotAlias(unsigned n) const {
- return AttributeList.hasAttribute(n, Attribute::NoAlias);
+ return AttributeSets.hasAttribute(n, Attribute::NoAlias);
}
void setDoesNotAlias(unsigned n) {
- addAttribute(n, Attribute::get(getContext(), Attribute::NoAlias));
+ addAttribute(n, Attribute::NoAlias);
}
/// @brief Determine if the parameter can be captured.
/// @param n The parameter to check. 1 is the first parameter, 0 is the return
bool doesNotCapture(unsigned n) const {
- return AttributeList.hasAttribute(n, Attribute::NoCapture);
+ return AttributeSets.hasAttribute(n, Attribute::NoCapture);
}
void setDoesNotCapture(unsigned n) {
- addAttribute(n, Attribute::get(getContext(), Attribute::NoCapture));
+ 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);
}
/// 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
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
inline ValueSymbolTable *
ilist_traits<BasicBlock>::getSymTab(Function *F) {
- return F ? &F->getValueSymbolTable() : 0;
+ return F ? &F->getValueSymbolTable() : nullptr;
}
inline ValueSymbolTable *
ilist_traits<Argument>::getSymTab(Function *F) {
- return F ? &F->getValueSymbolTable() : 0;
+ return F ? &F->getValueSymbolTable() : nullptr;
}
} // End llvm namespace
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