// passed by value, not by reference; it should not be "new"ed or "delete"d. It
// is efficiently copyable, assignable and constructable, with cost equivalent
// to copying a pointer (notice that it has only a single data member).
+// The internal representation carries a flag which indicates which of the two
+// variants is enclosed. This allows for cheaper checks when various accessors
+// of CallSite are employed.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_CALLSITE_H
#define LLVM_SUPPORT_CALLSITE_H
-#include "llvm/Instruction.h"
+#include "llvm/Attributes.h"
+#include "llvm/ADT/PointerIntPair.h"
#include "llvm/BasicBlock.h"
+#include "llvm/CallingConv.h"
+#include "llvm/Instruction.h"
namespace llvm {
class CallInst;
class InvokeInst;
-class ParamAttrsList;
class CallSite {
- Instruction *I;
+ PointerIntPair<Instruction*, 1, bool> I;
public:
- CallSite() : I(0) {}
- CallSite(CallInst *CI) : I(reinterpret_cast<Instruction*>(CI)) {}
- CallSite(InvokeInst *II) : I(reinterpret_cast<Instruction*>(II)) {}
- CallSite(const CallSite &CS) : I(CS.I) {}
- CallSite &operator=(const CallSite &CS) { I = CS.I; return *this; }
+ CallSite() : I(0, false) {}
+ CallSite(CallInst *CI) : I(reinterpret_cast<Instruction*>(CI), true) {}
+ CallSite(InvokeInst *II) : I(reinterpret_cast<Instruction*>(II), false) {}
+ CallSite(Instruction *C);
+
+ bool operator==(const CallSite &CS) const { return I == CS.I; }
+ bool operator!=(const CallSite &CS) const { return I != CS.I; }
/// CallSite::get - This static method is sort of like a constructor. It will
/// create an appropriate call site for a Call or Invoke instruction, but it
/// getCallingConv/setCallingConv - get or set the calling convention of the
/// call.
- unsigned getCallingConv() const;
- void setCallingConv(unsigned CC);
+ CallingConv::ID getCallingConv() const;
+ void setCallingConv(CallingConv::ID CC);
- /// getParamAttrs/setParamAttrs - get or set the parameter attributes of
+ /// getAttributes/setAttributes - get or set the parameter attributes of
/// the call.
- const ParamAttrsList *getParamAttrs() const;
- void setParamAttrs(const ParamAttrsList *PAL);
+ const AttrListPtr &getAttributes() const;
+ void setAttributes(const AttrListPtr &PAL);
/// paramHasAttr - whether the call or the callee has the given attribute.
- bool paramHasAttr(uint16_t i, unsigned attr) const;
+ bool paramHasAttr(uint16_t i, Attributes attr) const;
+
+ /// @brief Extract the alignment for a call or parameter (0=unknown).
+ uint16_t getParamAlignment(uint16_t i) const;
/// @brief Determine if the call does not access memory.
bool doesNotAccessMemory() const;
+ void setDoesNotAccessMemory(bool doesNotAccessMemory = true);
/// @brief Determine if the call does not access or only reads memory.
bool onlyReadsMemory() const;
+ void setOnlyReadsMemory(bool onlyReadsMemory = true);
+
+ /// @brief Determine if the call cannot return.
+ bool doesNotReturn() const;
+ void setDoesNotReturn(bool doesNotReturn = true);
/// @brief Determine if the call cannot unwind.
bool doesNotThrow() const;
/// getType - Return the type of the instruction that generated this call site
///
- const Type *getType() const { return I->getType(); }
+ const Type *getType() const { return getInstruction()->getType(); }
+
+ /// isCall - true if a CallInst is enclosed.
+ /// Note that !isCall() does not mean it is an InvokeInst enclosed,
+ /// it also could signify a NULL Instruction pointer.
+ bool isCall() const { return I.getInt(); }
+
+ /// isInvoke - true if a InvokeInst is enclosed.
+ ///
+ bool isInvoke() const { return getInstruction() && !I.getInt(); }
/// getInstruction - Return the instruction this call site corresponds to
///
- Instruction *getInstruction() const { return I; }
+ Instruction *getInstruction() const { return I.getPointer(); }
/// getCaller - Return the caller function for this call site
///
- Function *getCaller() const { return I->getParent()->getParent(); }
+ Function *getCaller() const { return getInstruction()
+ ->getParent()->getParent(); }
/// getCalledValue - Return the pointer to function that is being called...
///
Value *getCalledValue() const {
- assert(I && "Not a call or invoke instruction!");
- return I->getOperand(0);
+ assert(getInstruction() && "Not a call or invoke instruction!");
+ return getInstruction()->getOperand(0);
}
/// getCalledFunction - Return the function being called if this is a direct
/// setCalledFunction - Set the callee to the specified value...
///
void setCalledFunction(Value *V) {
- assert(I && "Not a call or invoke instruction!");
- I->setOperand(0, V);
+ assert(getInstruction() && "Not a call or invoke instruction!");
+ getInstruction()->setOperand(0, V);
}
Value *getArgument(unsigned ArgNo) const {
}
void setArgument(unsigned ArgNo, Value* newVal) {
- assert(I && "Not a call or invoke instruction!");
+ assert(getInstruction() && "Not a call or invoke instruction!");
assert(arg_begin() + ArgNo < arg_end() && "Argument # out of range!");
- if (I->getOpcode() == Instruction::Call)
- I->setOperand(ArgNo+1, newVal); // Skip Function
- else
- I->setOperand(ArgNo+3, newVal); // Skip Function, BB, BB
+ getInstruction()->setOperand(getArgumentOffset() + ArgNo, newVal);
+ }
+
+ /// Given an operand number, returns the argument that corresponds to it.
+ /// OperandNo must be a valid operand number that actually corresponds to an
+ /// argument.
+ unsigned getArgumentNo(unsigned OperandNo) const {
+ assert(OperandNo >= getArgumentOffset() && "Operand number passed was not "
+ "a valid argument");
+ return OperandNo - getArgumentOffset();
}
+ /// hasArgument - Returns true if this CallSite passes the given Value* as an
+ /// argument to the called function.
+ bool hasArgument(const Value *Arg) const;
+
/// arg_iterator - The type of iterator to use when looping over actual
/// arguments at this call site...
typedef User::op_iterator arg_iterator;
/// arg_begin/arg_end - Return iterators corresponding to the actual argument
/// list for a call site.
- ///
arg_iterator arg_begin() const {
- assert(I && "Not a call or invoke instruction!");
- if (I->getOpcode() == Instruction::Call)
- return I->op_begin()+1; // Skip Function
- else
- return I->op_begin()+3; // Skip Function, BB, BB
+ assert(getInstruction() && "Not a call or invoke instruction!");
+ // Skip non-arguments
+ return getInstruction()->op_begin() + getArgumentOffset();
}
- arg_iterator arg_end() const { return I->op_end(); }
+
+ arg_iterator arg_end() const { return getInstruction()->op_end(); }
bool arg_empty() const { return arg_end() == arg_begin(); }
unsigned arg_size() const { return unsigned(arg_end() - arg_begin()); }
bool operator<(const CallSite &CS) const {
return getInstruction() < CS.getInstruction();
}
+
+ bool isCallee(Value::use_iterator UI) const {
+ return getInstruction()->op_begin() == &UI.getUse();
+ }
+
+private:
+ /// Returns the operand number of the first argument
+ unsigned getArgumentOffset() const {
+ if (isCall())
+ return 1; // Skip Function
+ else
+ return 3; // Skip Function, BB, BB
+ }
};
} // End llvm namespace
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