[Bug tree-optimization/43257] New: [4.5 Regression] IPA-SRA changes DECL_ASSEMBLER_NAME

[rguenth at gcc dot gnu dot org]

IPA-SRA changes DECL_ASSEMBLER_NAME by changing the function signature before
mangling which results in collisions (testcase reduced from OpenOffice):

class A {};
class B {};

static void *func (int n)
{
  void *p;
  if (p == 0) throw ::A ();
}

static void *func (int n, B const &)
{
  try {
      return func (n);
  }
  catch (::A const &) {
  }
  return func (n);
}

void *f1 (int n)
{
  return func (n, B());
}

void *f2 (int n)
{
  return func (n, B());
}

> g++-4.5 -c t.C -O2
/tmp/ccav9PrN.s: Assembler messages:
/tmp/ccav9PrN.s:21: Error: symbol `_ZL4funcv' is already defined


-- 
           Summary: [4.5 Regression] IPA-SRA changes DECL_ASSEMBLER_NAME
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43257