On Tue, Apr 25, 2023 at 06:01:22PM +0200, Andy via Gcc wrote:
> I see it in godbolt
> GCC compiles to:
> movsx eax, BYTE PTR [rdi+2]
> cmp al, 9
> ja .L42
> Clang:
> movzx edx, byte ptr [rdi + 2]
> cmp edx, 9
> ja .LBB0_40
>
>
> GCC extend with sign, Clang with zero.
> cmp with 32 bit register is
在 2023/4/26 00:01, Andy via Gcc 写道:
I see it in godbolt
GCC compiles to:
movsx eax, BYTE PTR [rdi+2]
cmp al, 9
ja .L42
Clang:
movzx edx, byte ptr [rdi + 2]
cmp edx, 9
ja .LBB0_40
GCC extend with sign, Clang with zero.
cmp with 32 bit register is apparently faster than 8bit
As for extension, i
On Tue, 25 Apr 2023 at 20:21, Jonny Grant wrote:
>
>
>
> On 25/04/2023 13:22, Jonathan Wakely wrote:
> > On Tue, 25 Apr 2023 at 13:17, Jonathan Wakely wrote:
> >>
> >> On Tue, 25 Apr 2023 at 13:13, Jonny Grant wrote:
> >>>
> >>> Hello
> >>>
> >>> https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
On 25/04/2023 13:22, Jonathan Wakely wrote:
> On Tue, 25 Apr 2023 at 13:17, Jonathan Wakely wrote:
>>
>> On Tue, 25 Apr 2023 at 13:13, Jonny Grant wrote:
>>>
>>> Hello
>>>
>>> https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
>>>
>>> I wondered 'this_length' refers to in that example, it doesn
I see it in godbolt
GCC compiles to:
movsx eax, BYTE PTR [rdi+2]
cmp al, 9
ja .L42
Clang:
movzx edx, byte ptr [rdi + 2]
cmp edx, 9
ja .LBB0_40
GCC extend with sign, Clang with zero.
cmp with 32 bit register is apparently faster than 8bit
pon., 24 kwi 2023 o 17:34 Basile Starynkevitch
napisał(a)
On Tue, 25 Apr 2023 at 13:17, Jonathan Wakely wrote:
>
> On Tue, 25 Apr 2023 at 13:13, Jonny Grant wrote:
> >
> > Hello
> >
> > https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
> >
> > I wondered 'this_length' refers to in that example, it doesn't compile.
>
> It's not supposed to be a complete
On Tue, 25 Apr 2023 at 13:13, Jonny Grant wrote:
>
> Hello
>
> https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
>
> I wondered 'this_length' refers to in that example, it doesn't compile.
It's not supposed to be a complete program.
>
> : In function 'main':
> :13:34: error: 'this_length' undec
Hello
https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
I wondered 'this_length' refers to in that example, it doesn't compile.
: In function 'main':
:13:34: error: 'this_length' undeclared (first use in this function)
13 | malloc (sizeof (struct line) + this_length);
|
After GCC 13 is released we will remove legacy range support from the
compiler, and convert irange's to wide_ints. I want to give everyone
a heads up, to help understand what's involved and what the end result is.
Legacy ranges are basically the value_range type (int_range<1>) where
the internal
