Paul Koning writes:
> On Oct 1, 2019, at 5:14 AM, Segher Boessenkool
> wrote:
>>
>> The regrename pass temporarily changes some operand RTL to CC0 so that
>> note_stores and scan_rtx don't see those operands. CC0 is deprecated
>> and we want to remove it, so we need to use something else here.
On Oct 1, 2019, at 5:14 AM, Segher Boessenkool
wrote:
>
> The regrename pass temporarily changes some operand RTL to CC0 so that
> note_stores and scan_rtx don't see those operands. CC0 is deprecated
> and we want to remove it, so we need to use something else here.
> PC fits the bill fine.
CC
On Tue, Oct 01, 2019 at 10:18:37AM +0100, Richard Sandiford wrote:
> Segher Boessenkool writes:
> It's mentioned by name later too:
>
> /* Step 2: Mark chains for which we have reads outside operands
>as unrenamable.
>We do this by munging all operands into CC0, an
Segher Boessenkool writes:
> The regrename pass temporarily changes some operand RTL to CC0 so that
> note_stores and scan_rtx don't see those operands. CC0 is deprecated
> and we want to remove it, so we need to use something else here.
> PC fits the bill fine.
>
> Tested on powerpc64-linux {-m3
