alpha haifa regression

[Jeffrey A Law]

  In message < 199709290539.WAA12011@dot.cygnus.com >you write:
  > What happens is, the insn that loads from the va_list gets moved
  > before the stores from the register variables.  It does this
  > because alias decides that a variable struct memory cannot alias
  > a non-variable non-struct memory.
  > 
  > It seems a bit hoaky to me, but then the C alias rules are a bit
  > perverse, so I'll assume this is correct.
  > 
  > The solution then, since we don't want to slow down normal code
  > where we _can_ make these assumptions, is to emit blockage after
  > dumping the varargs regs to memory.  
Yup.  Same problem, same solution for the PA.

I've installed your patch.

However, in the future, please send ChangeLog entries too!

jeff