[LLVMbugs] [Bug 8239] New: Wrong generation of code for implicit cast to variably modified type

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8239

           Summary: Wrong generation of code for implicit cast to variably
                    modified type
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: abramobagnara at tin.it
                CC: llvmbugs at cs.uiuc.edu


int g() {
  ++gs;
  return 1;
}

void f(char (*a)[g()], int gs_);
void f(char (*a)[g()], int gs_)  {
  if (gs_ != 0)
    gs = -1;
}

int main() {
  char x[10];
  f(&x, gs);
  if (gs == 1)
    return 0;
  return 2;
}

This testcase shows that clang wrongly emit a call to g before to call f.

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