Patch attached for commit as I don't have write access.
> -----Original Message-----
> From: Marcus Shawcroft [mailto:[email protected]]
> Sent: 04 September 2014 16:23
> To: Wilco Dijkstra
> Cc: [email protected]
> Subject: Re: [PATCH 1/4] AArch64: Fix register_move_cost
>
> On 4 September 2014 15:44, Wilco Dijkstra <[email protected]> wrote:
> > Hi,
> >
> > This is a set of patches improving register costs on AArch64. The first
> > fixes
> > aarch64_register_move_cost() to support CALLER_SAVE_REGS and POINTER_REGS
> > so costs are
> calculated
> > correctly in the register allocator.
> >
> > ChangeLog:
> > 2014-09-04 Wilco Dijkstra <[email protected]>
> >
> > * gcc/config/aarch64/aarch64.c (aarch64_register_move_cost):
> > Add cost handling of CALLER_SAVE_REGS and POINTER_REGS.
>
> OK /Marcus
---
gcc/config/aarch64/aarch64.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 023f9fd..56b8eda 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -5932,6 +5932,13 @@ aarch64_register_move_cost (enum machine_mode mode,
const struct cpu_regmove_cost *regmove_cost
= aarch64_tune_params->regmove_cost;
+ /* Caller save and pointer regs are equivalent to GENERAL_REGS. */
+ if (to == CALLER_SAVE_REGS || to == POINTER_REGS)
+ to = GENERAL_REGS;
+
+ if (from == CALLER_SAVE_REGS || from == POINTER_REGS)
+ from = GENERAL_REGS;
+
/* Moving between GPR and stack cost is the same as GP2GP. */
if ((from == GENERAL_REGS && to == STACK_REG)
|| (to == GENERAL_REGS && from == STACK_REG))
--
1.9.1
