Painful problems with -fpic implementation on powerpc-sysv

[David Edelsohn]

>>>>> Geoff Keating writes:

Geoff> But the first insn, number 13, is a memory reference.  It doesn't look
Geoff> like it now, but pseudo 84 will be allocated to a floating-point
Geoff> register, and the only way to load a constant into a FP register is
Geoff> from memory.  So reload will push the const_double out to a constant
Geoff> memory location.  The load from memory will require the GOT pointer.
Geoff> But the GOT pointer is not initialised until the _next_ insn.

	The movdf define_splits to load a const_double into an FPR
currently have "... && reload_completed" as a final condition.  Would
changing this to "... && (reload_in_progress || reload_completed)" have a
positive effect?  This might allow reload to create the constant in GPRs
and move it via the stack instead of creating a GOT symbol, depending on
what reload is trying to accomplish when these failures are occurring.

David