[Bug target/21721] [4.0 regression] fails to assemble, Use of p0 is not valid in this context

[sje at cup dot hp dot com]

------- Additional Comments From sje at cup dot hp dot com  2005-05-31 21:10 -------
It looks like this is due to code in ia64/ia64.c (ia64_compute_frame_size).
If we need to store any predicate register (before a call I presume), the code
stores them all and sets regs_ever_live[regno] to 1 for all predicate registers.

There are question marks in the comment for this code.  It looks like it was
added in version 1.40 of ia64.c by rth.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21721