[llvm-bugs] [Bug 33711] New: MS ABI: debug information crashes on diamond inheritance

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33711

            Bug ID: 33711
           Summary: MS ABI:  debug information crashes on diamond
                    inheritance
           Product: clang
           Version: 4.0
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: steinar+llvm at gunderson.no
                CC: llvm-bugs at lists.llvm.org

clang version 4.0.1 (tags/RELEASE_401/final)
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files\LLVM\bin


Reduced test case (after a 24-hour rather painful reduction!):

struct a {
  char *b;
  size_t c;
};
class d {
public:
  virtual ~d();
};
class e {
  int f();
  a g();
};
class h {
protected:
  h();
  virtual ~h();
};
class i : virtual d, h {
public:
  ~i();
};
class j : i, d {
public:
  j(e *, char *, size_t) {}
};
int e::f() { j(this, g().b, g().c); }

clang-cl /c /Z7 /EHsc -m64 -fmsc-version=1900 test.cc
test.cc(22,14):  warning: direct base 'd' is inaccessible due to ambiguity:
    class j -> class i -> class d
    class j -> class d [-Winaccessible-base]
class j : i, d {
             ^
test.cc(26,37):  warning: control reaches end of non-void function
[-Wreturn-type]
int e::f() { j(this, g().b, g().c); }
                                    ^
inlinable function call in a function with debug info must have a !dbg location
  call void @"\01??_Di@@UEAA at XZ"(%class.i* %this1) #7
fatal error: error in backend: Broken function found, compilation aborted!
clang-cl.exe: error: clang frontend command failed with exit code 70 (use -v to
see invocation)
clang version 4.0.1 (tags/RELEASE_401/final)
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files\LLVM\bin
clang-cl.exe: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and
associated run script.
clang-cl.exe: note: diagnostic msg: 
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-cl.exe: note: diagnostic msg: C:\cygwin\tmp\test-3b01e5.cpp
clang-cl.exe: note: diagnostic msg: C:\cygwin\tmp\test-3b01e5.sh
clang-cl.exe: note: diagnostic msg: 

********************

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