clang/test/CodeGen/call-graph-section-3.cpp

// Tests that we assign appropriate identifiers to indirect calls and targets
// specifically for virtual methods.

// RUN: %clang_cc1 -triple x86_64-unknown-linux -fcall-graph-section -S \
// RUN: -emit-llvm -o %t %s
// RUN: FileCheck --check-prefix=FT %s < %t
// RUN: FileCheck --check-prefix=CST %s < %t

////////////////////////////////////////////////////////////////////////////////
// Class definitions (check for indirect target metadata)

class Base {
public:
  // FT-DAG: define {{.*}} @_ZN4Base2vfEPc({{.*}} !type [[F_TVF:![0-9]+]]
  virtual int vf(char *a) { return 0; };
};

class Derived : public Base {
public:
  // FT-DAG: define {{.*}} @_ZN7Derived2vfEPc({{.*}} !type [[F_TVF]]
  int vf(char *a) override { return 1; };
};

// FT-DAG: [[F_TVF]] = !{i64 0, !"_ZTSFiPvE.generalized"}

////////////////////////////////////////////////////////////////////////////////
// Callsites (check for indirect callsite operand bundles)

// CST-LABEL: define {{.*}} @_Z3foov
void foo() {
  auto B = Base();
  auto D = Derived();

  Base *Bptr = &B;
  Base *BptrToD = &D;
  Derived *Dptr = &D;

  auto FpBaseVf = &Base::vf;
  auto FpDerivedVf = &Derived::vf;

  // CST: call noundef i32 %{{.*}} [ "type"(metadata !"_ZTSFiPvE.generalized") ]
  (Bptr->*FpBaseVf)(0);

  // CST: call noundef i32 %{{.*}} [ "type"(metadata !"_ZTSFiPvE.generalized") ]
  (BptrToD->*FpBaseVf)(0);

  // CST: call noundef i32 %{{.*}} [ "type"(metadata !"_ZTSFiPvE.generalized") ]
  (Dptr->*FpBaseVf)(0);

  // CST: call noundef i32 %{{.*}} [ "type"(metadata !"_ZTSFiPvE.generalized") ]
  (Dptr->*FpDerivedVf)(0);
}