llvm/clang/test/CodeGen/2002-03-14-BrokenSSA.c

// RUN: %clang_cc1 -emit-llvm %s  -o /dev/null

/* This code used to break GCC's SSA computation code.  It would create
   uses of B & C that are not dominated by their definitions.  See:
   http://gcc.gnu.org/ml/gcc/2002-03/msg00697.html
 */
int bar(void);
int foo(void)
{
  int a,b,c;

  a = b + c;
  b = bar();
  c = bar();
  return a + b + c;
}