[LLVMbugs] [Bug 14097] New: incorrect debug info generated for constructor

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=14097

             Bug #: 14097
           Summary: incorrect debug info generated for constructor
           Product: clang
           Version: 3.1
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: olga.a.chupina at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 9357
  --> http://llvm.org/bugs/attachment.cgi?id=9357
clang-generated code with debug info

Please take a look at the file test.cpp with class B and class D virtually
inheriting B.

test.cpp:
class B {
  int b;
};
class D : virtual B {
  int d;
public:
  void f(int i);
};
void D::f(int i) {
  d = i + 5;
}
int main() {
  D xx;
  xx.f(1);    
}


Debug info descriptor for automatically-generated constructor of class B is
incorrect. Constructor B() doesn't have declaration, only definition. B() is
not linked in any way with the class B (it is not in the list of members of
class B). Thus B() appears as stand-alone artificial function and cannot be
determined as constructor. 

The same bug could be reproduced in some more complicated cases for
destructors.

The .bc file is attached.
Compilation line: clang -O0 -g -S -emit-llvm -o test.bc test.cpp


Olga Chupina
---
Software Engineer
Intel Compiler Team
Intel Corp.

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