On Wed, 2 Sep 2020, Richard Biener via Gcc wrote:
On Mon, Aug 24, 2020 at 8:20 AM Feng Xue OS via Gcc wrote:
There is a match-folding issue derived from pr94234. A piece of code like:
int foo (int n)
{
int t1 = 8 * n;
int t2 = 8 * (n - 1);
return t1 - t2;
}
It can
>
>>
>> >> There is a match-folding issue derived from pr94234. A piece of code
>> >> like:
>> >>
>> >> int foo (int n)
>> >> {
>> >> int t1 = 8 * n;
>> >> int t2 = 8 * (n - 1);
>> >>
>> >> return t1 - t2;
>> >> }
>> >>
>> >> It can be perfectly caught by the rule "(A * C)
On Wed, Sep 2, 2020 at 9:27 AM Marc Glisse wrote:
>
> On Wed, 2 Sep 2020, Richard Biener via Gcc wrote:
>
> > On Mon, Aug 24, 2020 at 8:20 AM Feng Xue OS via Gcc wrote:
> >>
> There is a match-folding issue derived from pr94234. A piece of code
> like:
>
> int foo (int n
On Wed, Sep 2, 2020 at 9:35 AM Feng Xue OS wrote:
>
> >
> >>
> >> >> There is a match-folding issue derived from pr94234. A piece of code
> >> >> like:
> >> >>
> >> >> int foo (int n)
> >> >> {
> >> >> int t1 = 8 * n;
> >> >> int t2 = 8 * (n - 1);
> >> >>
> >> >> return t1 -
>>
>> >
>> >>
>> >> >> There is a match-folding issue derived from pr94234. A piece of
>> >> >> code like:
>> >> >>
>> >> >> int foo (int n)
>> >> >> {
>> >> >> int t1 = 8 * n;
>> >> >> int t2 = 8 * (n - 1);
>> >> >>
>> >> >> return t1 - t2;
>> >> >> }
>> >> >>
>> >> >> It
On Wed, 2 Sep 2020, Richard Biener via Gcc wrote:
> > Or we could decide that the extra multiplication is not that bad if it
> > saves an addition, simplifies the expression, possibly gains more insn
> > parallelism, etc, in which case we could just drop the existing hard
> > single_use check...
>
Hello,
I am trying to find out all pointers which alias a pointer and place
them in a set.
I am using `ptr_derefs_may_alias_p` to find out if two pointers may
point to the same memory location. I think this yields conservative
results (i.e., when it cannot be proven that to pointers may alia
On Wed, Sep 2, 2020 at 10:04 AM Erick Ochoa
wrote:
>
> Hello,
>
> I am trying to find out all pointers which alias a pointer and place
> them in a set.
>
> I am using `ptr_derefs_may_alias_p` to find out if two pointers may
> point to the same memory location. I think this yields conservative
> re
Hi David,
On Mon, 2020-08-31 at 20:10 -0700, David Blaikie wrote:
> Hey Mark - saw a little of/bits about your presentation at LPC 2020 GNU
> Tools Track (& your thread on on the gdb list about debug_names). Wondering
> if you (or anyone else you know who's contributing to debug info in GCC)
> hav
PR96791 is happening because DSE is trying to truncate a
POImode reg down to DImode. The POImode is created by a
structure copy that gets inline expanded using lxvp/stxvp
which we have defined using POImode. DSE recognizes that a
following load overlaps with the stxvp and can be satisfied
by a tr
Meant to CC a few people, oops.
Aaron Sawdey, Ph.D. saw...@linux.ibm.com
IBM Linux on POWER Toolchain
> On Sep 2, 2020, at 9:22 AM, Aaron Sawdey via Gcc wrote:
>
>
> PR96791 is happening because DSE is trying to truncate a
> POImode reg down to DImode. The POImode is created by a
> structure
I'm not accusing inlining of having problems but I really
need to understand what's going on in this situation so I can
fix my optimization.
The error given is:
main.c: In function ‘main’:
main.c:5:1: error: non-trivial conversion in ‘ssa_name’
5 | main(void)
| ^
struct type_t *
unsigned
On Wed, Sep 2, 2020 at 4:12 AM Mark Wielaard wrote:
> Hi David,
>
> On Mon, 2020-08-31 at 20:10 -0700, David Blaikie wrote:
> > Hey Mark - saw a little of/bits about your presentation at LPC 2020 GNU
> > Tools Track (& your thread on on the gdb list about debug_names).
> Wondering
> > if you (or
I've updated the gcc-reposurgeon-8 test repository
(git+ssh://gcc.gnu.org/home/gccadmin/gcc-reposurgeon-8.git) to use the
same copy of the git hooks as used by binutils-gdb, glibc and other
repositories on sourceware.
All the features from local hook changes are now handled, with this new
vers
On Wed, Sep 2, 2020 at 10:19 PM Gary Oblock via Gcc wrote:
>
> I'm not accusing inlining of having problems but I really
> need to understand what's going on in this situation so I can
> fix my optimization.
>
> The error given is:
> main.c: In function ‘main’:
> main.c:5:1: error: non-trivial con
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