//===-- 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 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
// 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.)
+// to copying a pointer (notice that it has only a single data member).
//
//===----------------------------------------------------------------------===//
#include "llvm/Instruction.h"
#include "llvm/BasicBlock.h"
+#include "llvm/ParameterAttributes.h"
namespace llvm {
Instruction *I;
public:
CallSite() : I(0) {}
- CallSite(CallInst *CI) : I((Instruction*)CI) {}
- CallSite(InvokeInst *II) : I((Instruction*)II) {}
+ CallSite(CallInst *CI) : I(reinterpret_cast<Instruction*>(CI)) {}
+ CallSite(InvokeInst *II) : I(reinterpret_cast<Instruction*>(II)) {}
+ CallSite(Instruction *C);
CallSite(const CallSite &CS) : I(CS.I) {}
CallSite &operator=(const CallSite &CS) { I = CS.I; return *this; }
+ 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
/// can also create a null initialized CallSite object for something which is
static CallSite get(Value *V) {
if (Instruction *I = dyn_cast<Instruction>(V)) {
if (I->getOpcode() == Instruction::Call)
- return CallSite((CallInst*)I);
+ return CallSite(reinterpret_cast<CallInst*>(I));
else if (I->getOpcode() == Instruction::Invoke)
- return CallSite((InvokeInst*)I);
+ return CallSite(reinterpret_cast<InvokeInst*>(I));
}
return CallSite();
}
+ /// getCallingConv/setCallingConv - get or set the calling convention of the
+ /// call.
+ unsigned getCallingConv() const;
+ void setCallingConv(unsigned CC);
+
+ /// getParamAttrs/setParamAttrs - get or set the parameter attributes of
+ /// the call.
+ const PAListPtr &getParamAttrs() const;
+ void setParamAttrs(const PAListPtr &PAL);
+
+ /// paramHasAttr - whether the call or the callee has the given attribute.
+ bool paramHasAttr(uint16_t i, ParameterAttributes 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;
+ void setDoesNotThrow(bool doesNotThrow = true);
+
/// getType - Return the type of the instruction that generated this call site
///
- const Type *getType () const { return I->getType (); }
+ const Type *getType() const { return I->getType(); }
/// getInstruction - Return the instruction this call site corresponds to
///
/// getCalledFunction - Return the function being called if this is a direct
/// call, otherwise return null (if it's an indirect call).
///
- /// FIXME: This should be inlined once ConstantPointerRefs are gone. :(
- Function *getCalledFunction() const;
+ Function *getCalledFunction() const {
+ return dyn_cast<Function>(getCalledValue());
+ }
/// setCalledFunction - Set the callee to the specified value...
///
I->setOperand(0, V);
}
+ Value *getArgument(unsigned ArgNo) const {
+ assert(arg_begin() + ArgNo < arg_end() && "Argument # out of range!");
+ return *(arg_begin()+ArgNo);
+ }
+
+ void setArgument(unsigned ArgNo, Value* newVal) {
+ assert(I && "Not a call or invoke instruction!");
+ assert(arg_begin() + ArgNo < arg_end() && "Argument # out of range!");
+ I->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
+ return I->op_begin() + getArgumentOffset(); // Skip non-arguments
}
+
arg_iterator arg_end() const { return I->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();
}
+
+private:
+ /// Returns the operand number of the first argument
+ unsigned getArgumentOffset() const {
+ if (I->getOpcode() == Instruction::Call)
+ return 1; // Skip Function
+ else
+ return 3; // Skip Function, BB, BB
+ }
};
} // End llvm namespace
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