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[Bug target/63521] The AArch64 backend doesn't define REG_ALLOC_ORDER.
- From: "rearnsha at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 13 Oct 2014 12:13:41 +0000
- Subject: [Bug target/63521] The AArch64 backend doesn't define REG_ALLOC_ORDER.
- Auto-submitted: auto-generated
- References: <bug-63521-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63521
--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Ideally, a port should not need to define reg_alloc_order; it's rather a blunt
instrument.
Better would be for the register allocator to have a better understanding of
which registers are being used for parameter passing in the current routine so
that it can pick from the remaining call-clobbered list.