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697a00fbf0
* add new setCalledFunction method * FIX arg_end method which was horribly broken! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6758 91177308-0d34-0410-b5e6-96231b3b80d8
78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
//===-- llvm/Support/CallSite.h - Abstract Call & Invoke instrs -*- C++ -*-===//
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//
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// This file defines the CallSite class, which is a handy wrapper for code that
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// wants to treat Call and Invoke instructions in a generic way.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_CALLSITE_H
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#define LLVM_SUPPORT_CALLSITE_H
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#include "llvm/Instruction.h"
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class CallInst;
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class InvokeInst;
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class CallSite {
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Instruction *I;
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public:
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CallSite() : I(0) {}
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CallSite(CallInst *CI) : I((Instruction*)CI) {}
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CallSite(InvokeInst *II) : I((Instruction*)II) {}
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CallSite(const CallSite &CS) : I(CS.I) {}
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CallSite &operator=(const CallSite &CS) { I = CS.I; return *this; }
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/// CallSite::get - This static method is sort of like a constructor. It will
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/// create an appropriate call site for a Call or Invoke instruction, but it
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/// can also create a null initialized CallSite object for something which is
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/// NOT a call site.
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///
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static CallSite get(Value *V) {
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if (Instruction *I = dyn_cast<Instruction>(V)) {
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if (I->getOpcode() == Instruction::Call)
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return CallSite((CallInst*)I);
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else if (I->getOpcode() == Instruction::Invoke)
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return CallSite((InvokeInst*)I);
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}
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return CallSite();
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}
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/// getInstruction - Return the instruction this call site corresponds to
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///
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Instruction *getInstruction() const { return I; }
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/// getCalledValue - Return the pointer to function that is being called...
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///
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Value *getCalledValue() const { return I->getOperand(0); }
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/// getCalledFunction - Return the function being called if this is a direct
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/// call, otherwise return null (if it's an indirect call).
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///
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Function *getCalledFunction() const {
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return dyn_cast<Function>(getCalledValue());
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}
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/// setCalledFunction - Set the callee to the specied value...
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///
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void setCalledFunction(Value *V) {
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I->setOperand(0, V);
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}
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/// arg_iterator - The type of iterator to use when looping over actual
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/// arguments at this call site...
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typedef User::op_iterator arg_iterator;
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/// arg_begin/arg_end - Return iterators corresponding to the actual argument
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/// list for a call site.
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///
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arg_iterator arg_begin() const {
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if (I->getOpcode() == Instruction::Call)
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return I->op_begin()+1; // Skip Function
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else
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return I->op_begin()+3; // Skip Function, BB, BB
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}
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arg_iterator arg_end() const { return I->op_end(); }
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};
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#endif
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