//===-- llvm/Support/CallSite.h - Abstract Call & Invoke instrs -*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
//
// This file defines the CallSite class, which is a handy wrapper for code that
// wants to treat Call and Invoke instructions in a generic way.
//
+// NOTE: This class is supposed to have "value semantics". So it should be
+// 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. (You will notice that it has only a single data
+// member.)
+//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_CALLSITE_H
#define LLVM_SUPPORT_CALLSITE_H
#include "llvm/Instruction.h"
+#include "llvm/BasicBlock.h"
+
+namespace llvm {
class CallInst;
class InvokeInst;
CallSite(const CallSite &CS) : I(CS.I) {}
CallSite &operator=(const CallSite &CS) { I = CS.I; return *this; }
+ /// 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
+ /// can also create a null initialized CallSite object for something which is
+ /// NOT a call site.
+ ///
+ static CallSite get(Value *V) {
+ if (Instruction *I = dyn_cast<Instruction>(V)) {
+ if (I->getOpcode() == Instruction::Call)
+ return CallSite((CallInst*)I);
+ else if (I->getOpcode() == Instruction::Invoke)
+ return CallSite((InvokeInst*)I);
+ }
+ return CallSite();
+ }
+
+ /// getType - Return the type of the instruction that generated this call site
+ ///
+ const Type *getType () const { return I->getType (); }
+
/// getInstruction - Return the instruction this call site corresponds to
+ ///
Instruction *getInstruction() const { return I; }
+ /// getCaller - Return the caller function for this call site
+ ///
+ Function *getCaller() const { return I->getParent()->getParent(); }
+
/// getCalledValue - Return the pointer to function that is being called...
///
- Value *getCalledValue() const { return I->getOperand(0); }
+ Value *getCalledValue() const {
+ assert(I && "Not a call or invoke instruction!");
+ return I->getOperand(0);
+ }
/// getCalledFunction - Return the function being called if this is a direct
/// call, otherwise return null (if it's an indirect call).
///
- Function *getCalledFunction() const {
- return dyn_cast<Function>(getCalledValue());
+ /// FIXME: This should be inlined once ConstantPointerRefs are gone. :(
+ Function *getCalledFunction() const;
+
+ /// setCalledFunction - Set the callee to the specified value...
+ ///
+ void setCalledFunction(Value *V) {
+ assert(I && "Not a call or invoke instruction!");
+ I->setOperand(0, V);
}
/// arg_iterator - The type of iterator to use when looping over actual
/// 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
}
- arg_iterator arg_end() const { return I->op_begin(); }
+ arg_iterator arg_end() const { return I->op_end(); }
+ unsigned arg_size() const { return unsigned(arg_end() - arg_begin()); }
+
+ bool operator<(const CallSite &CS) const {
+ return getInstruction() < CS.getInstruction();
+ }
};
+} // End llvm namespace
+
#endif