On 10/09/2012 08:31 AM, Aurelien Jarno wrote:
> I am not talking about the code generated by TCG, but rather by the code
> generated by GCC. Does using sum += and sum -= brings a gain to compare
> to the equivalent if function?
It's hard to tell. My guess is that it's about a wash. Adding an
art
On Tue, Oct 09, 2012 at 08:23:27AM -0700, Richard Henderson wrote:
> On 10/09/2012 08:13 AM, Aurelien Jarno wrote:
> >> > It also prefers
> >> >
> >> > add r, r, c
> >> > over
> >> > add r, c, r
> >> >
> >> > when both inputs are known constants. This doesn't matter for true add,
> >> > as
On 10/09/2012 08:13 AM, Aurelien Jarno wrote:
>> > It also prefers
>> >
>> > add r, r, c
>> > over
>> > add r, c, r
>> >
>> > when both inputs are known constants. This doesn't matter for true add, as
>> > we will fully constant fold that. But it matters for a follow-on patch
>> > using
>>
On Tue, Oct 02, 2012 at 11:32:21AM -0700, Richard Henderson wrote:
> Reduces code duplication and prefers
>
> movcond d, c1, c2, const, s
> to
> movcond d, c1, c2, s, const
>
> It also prefers
>
> add r, r, c
> over
> add r, c, r
>
> when both inputs are known constants. This doesn't m
Reduces code duplication and prefers
movcond d, c1, c2, const, s
to
movcond d, c1, c2, s, const
It also prefers
add r, r, c
over
add r, c, r
when both inputs are known constants. This doesn't matter for true add, as
we will fully constant fold that. But it matters for a follow-on patc
