Assignee: unassigned at gcc dot gnu.org
Reporter: goldstein.w.n at gmail dot com
Target Milestone: ---
```
#include
__m256i
shouldnt_have_movabs ()
{
return _mm256_set1_epi8 (123);
}
__m256i
should_be_cmpeq_abs ()
{
return _mm256_set1_epi8 (1);
}
__m256i
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106038
--- Comment #5 from Noah Goldstein ---
(In reply to Richard Biener from comment #4)
> The vectorizer does not anticipate store-merging performing "vectorization"
> in GPRs and thus the scalar cost is off (it also doesn't anticipate the
> differe
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106038
--- Comment #2 from Noah Goldstein ---
(In reply to Andrew Pinski from comment #1)
> Created attachment 53175 [details]
> Testcase -O3 -march=icelake-client
>
> Next time attach the testcase and not link to godbolt without a testcase.
Sorry.
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: goldstein.w.n at gmail dot com
Target Milestone: ---
See: https://godbolt.org/z/YxWEn6Y65
Basically in all cases where the total amount of memory touched is <= 8 bytes
(word s
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: goldstein.w.n at gmail dot com
Target Milestone: ---
GCC sometimes replaces
_mm256_mask_loadu_epi32(__m256i src, __mask8 k, void const * mem_addr) //
vmovdqu32
With
vpblendd
If
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: goldstein.w.n at gmail dot com
Target Milestone: ---
See: https://gcc.godbolt.org/z/Y591MW
void __attribute__((noinline))
tzncnt_not_just_return(uint64_t v) {
for (; v
: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: goldstein.w.n at gmail dot com
Target Milestone: ---
uint64_t
do_mod(uint64_t x, uint64_t y) {
if(x >= y) {
__builtin_unreacha
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: goldstein.w.n at gmail dot com
Target Milestone: ---
https://stackoverflow.com/questions/63432157/why-does-gcc-use-btq-in-conjunction-with-btcq-when-conditionally-set-a-bit-in-a
