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[committed] Fix "error: unable to find a register to spill in class 'R1_REGS'" reloading indirect call operand

From: John David Anglin <dave dot anglin at bell dot net>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Mon, 3 Aug 2015 13:44:43 -0400
Subject: [committed] Fix "error: unable to find a register to spill in class 'R1_REGS'" reloading indirect call operand
Authentication-results: sourceware.org; auth=none

The 64-bit register indirect call does not use register %r1.  So, %r1 shouldn't be clobbered in
the call pattern.  Normally, this doesn't matter as register %r1 is call clobbered.  However,
reload can fail when the register used for the indirect call needs to be reloaded from a static
location.  In this case, register %r1 is needed for the reload and the clobber blocks the reload.

Tested on hppa64-hp-hpux11.11 and hppa2.0w-hp-hpux11.11.  Committed to trunk, gcc-5
and gcc-4.9.

Dave
--
John David Anglin	dave.anglin@bell.net

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