On Tue, Apr 05, 2022 at 04:05:22PM +0200, Peter Zijlstra wrote:
> On Tue, Apr 05, 2022 at 01:51:30PM +0100, Mark Rutland wrote:
> > Hi all,
> >
> > [adding kernel folk who work on asm stuff]
> >
> > As a heads-up, GCC 12 (not yet released) appears to erroneously optimize
> > away
> > calls to fu
On Tue, Apr 05, 2022 at 01:51:30PM +0100, Mark Rutland wrote:
> Hi all,
>
> [adding kernel folk who work on asm stuff]
>
> As a heads-up, GCC 12 (not yet released) appears to erroneously optimize away
> calls to functions with volatile asm. Szabolcs has raised an issue on the GCC
> bugzilla:
>
Hi all,
I've been looking at implementing the complex multiply patterns for the
amdgcn port, but I'm not getting the code I was hoping for. When I try
to use the patterns on x86_64 or AArch64 they don't seem to work there
either, so is there something wrong with the middle-end? I've tried both
On Mon, Apr 11, 2022 at 1:26 PM Andrew Stubbs wrote:
>
> Hi all,
>
> I've been looking at implementing the complex multiply patterns for the
> amdgcn port, but I'm not getting the code I was hoping for. When I try
> to use the patterns on x86_64 or AArch64 they don't seem to work there
> either, s
HI,
> -Original Message-
> From: Andrew Stubbs
> Sent: Monday, April 11, 2022 12:19 PM
> To: GCC Development
> Cc: Tamar Christina
> Subject: Complex multiply optimization working?
>
> Hi all,
>
> I've been looking at implementing the complex multiply patterns for the
> amdgcn port, b
On 11/04/2022 13:02, Richard Biener wrote:
You need to check the vectorizer dump whether a complex pattern
was recognized or not. Did you properly use -ffast-math?
Aha! I needed to enable -ffast-math.
I missed that this is unsafe, and there's a fall-back to _muldc3 on NaN.
OK, presumably I n
On 11/04/2022 13:03, Tamar Christina wrote:
They work fine in both GCC 11 and HEAD https://godbolt.org/z/Mxxz6qWbP
Did you actually enable the instructions?
Yes, as I said it uses the instructions, just not fully vectorized.
Anyway, the problem was I needed -ffast-math to skip the NaN checks.
Hi,
I will not be able to participate in GSoC this year. However, I will
continue
working on the demangler on any occasion that I will have. I will continue
updating the mailing list about my progress.
Regards,
Juan
Hi,
On 4/11/22 05:31, Mark Rutland wrote:
On Tue, Apr 05, 2022 at 01:51:30PM +0100, Mark Rutland wrote:
Hi all,
[adding kernel folk who work on asm stuff]
As a heads-up, GCC 12 (not yet released) appears to erroneously optimize away
calls to functions with volatile asm. Szabolcs has raised a
Hello,
I want to collect complete rtl instruction corresponding to below gimple
call - "__builtin_temp"
I have gimple instructions of form -
slli_31 = _2 << 8;
srli_32 = slli_31 >> 8;
add_33 = srli_32 + 15;
_20 = __builtin_temp (instrn_buffer.36_1, 1, add_33);
For that, I put breakpoint in expa
If I configure gcc with the following
../gccx/configure --prefix=$HOME/work/x --enable-languages=c,c++,fortran \
--enable-bootstrap --disable-nls --enable-checking --disable-multilib \
--disable-libsanitizer --disable-lto.
then bootstrap gcc, why do I see 1000s of failures with
% cd gcc
% gm
> On 08-Apr-2022, at 6:32 PM, Jan Hubicka wrote:
>
> Ankur,
>> I was browsing the list of submitted GSoC projects this year and the
>> project regarding bypassing assembler when generating LTO object files
>> caught my eye.
> I apologize for late reply. I would be very happy to mentor this
>
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