[tree-ssa] Bootstrap failure on i686-linux

[law at redhat dot com]

I forgot to attach my testcase for the PRE problem.

Attached.  Compile with -O2 -pedantic.   The problem is the structures
that the block statement iterators depend on are mucked up for block #3
after PRE has completed.




typedef unsigned int size_t;
typedef unsigned long int reg_syntax_t;
struct re_pattern_buffer
{
  unsigned char *buffer;
};
typedef enum
{
  jump,
  jump_n,
} re_opcode_t;
static int
foo (bufp)
     struct re_pattern_buffer *bufp;
{
  int mcnt;
  unsigned char *p = bufp->buffer;
  switch (((re_opcode_t) * p++))
    {
    unconditional_jump:
      ;
    case jump:
      do
	{
	  (mcnt) = *(p) & 0377;
	}
      while (0);
      (p) += 2;
      p += mcnt;
    case jump_n:
      (mcnt) = *(p + 2) & 0377;
      if (mcnt)
	goto unconditional_jump;
    }
}