Alan Modra wrote:
Some notes: Setting old to rl-in_reg when it is a subreg doesn't
change the cases where delete_output_reload is called, since that call
is protected by REG_P (old). The same thing goes for the following:
/* If we are reloading a pseudo-register that was set by the
PR57936 is regarding a reload problem with rs6000_secondary_reload_inner.
This is the failing instruction, as at the start of reload:
(insn 61 60 62 3 (set (reg:V16QI 220)
(unspec:V16QI [
(subreg:V16QI (reg:V2DI 159 [ D.2446 ]) 0)
(subreg:V16QI (reg:V2DI
Alan Modra wrote:
Normally, reload 2, the secondary reload for reload 3, would result in
a call to reload_v16qi_si_load with (reg:V16QI 78 1) as its reg
argument, and the mem home for pseudo reg 159 as its mem arg.
However, reload1.c:choose_reload_regs has code to, as the comment
says:
On Tue, Feb 25, 2014 at 02:30:59PM +0100, Ulrich Weigand wrote:
Alan Modra wrote:
Normally, reload 2, the secondary reload for reload 3, would result in
a call to reload_v16qi_si_load with (reg:V16QI 78 1) as its reg
argument, and the mem home for pseudo reg 159 as its mem arg.
On Wed, Feb 26, 2014 at 01:03:52AM +1030, Alan Modra wrote:
On Tue, Feb 25, 2014 at 02:30:59PM +0100, Ulrich Weigand wrote:
Instead, there's code in emit_input_reload_insns that is supposed
to re-check whether a secondary reload is still needed if something
changed significantly, e.g. if a
