On 11/27/13 03:19, Yvan Roux wrote:
Ping.
On 20 November 2013 10:22, Yvan Roux <yvan.r...@linaro.org> wrote:
Hi,
as Richard said, only a subset of rclass is allowed to be returned by
preferred_reload_class.
I don't think he was quite that definitive. "One reading of the manual
suggests ...". However, Richard's interpretation is the same as I've
had for eons. You can return the original class, a narrower class or
NO_REGS.
I've tested the attached patched in Thumb
mode, on ARMv5, A9 and A9hf and on cross A15 without regression.
Yvan
2013-11-20 Yvan Roux <yvan.r...@linaro.org>
PR target/58785
* config/arm/arm.c (arm_preferred_reload_class): Only return LO_REGS
when rclass is GENERAL_REGS.
This is fine for the trunk as it implements Richard's recommendation and
brings the code into compliance with the semantics of P_R_C.
Jeff
