[LLVMdev] Work with CallSites

[Михаил]

Hi.

I have a test program:

class A {
	int A;
public:
	virtual void test ( int x ) = 0;
};

class B : public A {
	int B;
public:
	void test ( int x ) {};
};

int main() {	
	A *a = new B();	
	a->test(1);
}

We have call site CS: "a->test(1);". CS.getCalledFunction() - return NULL, so we can say that this call site is virtual. My optimization determines, that in this call site B::test() should be called. 
I've tried to use CSn.setCalledFunction(F) (where F is B::test()), but I've got this:
	
Check function __cxa_pure_virtual
Call parameter type does not match function signature!
  %6 = load %class.A** %a, align 4
 %class.B*  call void @_ZN1B4testEi(%class.A* %6, i32 1)

Ok! I've tried to change the first %class.A %6 to %class.B %6 by "FirstArgumentOfCS->get()->mutateType(FunctionFirstArgement->getType());", but in this case I've got this:

	
Check function __cxa_pure_virtual
Load result type does not match pointer operand type!
  %6 = load %class.A** %a, align 4
 %class.A*Instruction does not dominate all uses!
  %6 = load %class.A** %a, align 4
  %7 = bitcast %class.B* %6 to void (%class.A*, i32)***
Instruction does not dominate all uses!
  %7 = bitcast %class.B* %6 to void (%class.A*, i32)***
  %8 = load void (%class.A*, i32)*** %7
Instruction does not dominate all uses!
  %8 = load void (%class.A*, i32)*** %7
  %9 = getelementptr inbounds void (%class.A*, i32)** %8, i64 0
Instruction does not dominate all uses!
  %9 = getelementptr inbounds void (%class.A*, i32)** %8, i64 0
  %10 = load void (%class.A*, i32)** %9
Instruction does not dominate all uses!
  %6 = load %class.A** %a, align 4
  call void @_ZN1B4testEi(%class.B* %6, i32 1)

Can you tell me how correctly I can use CSn.setCalledFunction(F) in my case. Thanks!


Yours sincerely,
Kadysev Mikhail

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