https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115406
--- Comment #9 from GCC Commits ---
The trunk branch has been updated by Richard Sandiford :
https://gcc.gnu.org/g:348d890c287a7ec4c88d3082ae6105537bd39398
commit r15-2161-g348d890c287a7ec4c88d3082ae6105537bd39398
Author: Richard Sandiford
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115406
Richard Sandiford changed:
What|Removed |Added
Resolution|--- |FIXED
Status|ASSIGNED
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115406
Richard Biener changed:
What|Removed |Added
Last reconfirmed|2024-06-10 00:00:00 |2024-7-18
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115406
--- Comment #7 from Hongtao Liu ---
>
> BTW, when assign -1 to vector(1) , should the upper bit be
> cleared? Look like only 1 element boolean vector is cleared, but not
> vector(2) .
> If the upper bits are not cleared, both 2 cases are
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115406
--- Comment #6 from Hongtao Liu ---
For 1 element vector, when backend doesn't support it's vector mode, the scalar
mode is used for the type, which makes expand_vec_cond_expr_p use QImode for
icode check.(vcond_mask_qiqi)
It could also be the
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115406
--- Comment #5 from Hongtao Liu ---
> _2 = VEC_COND_EXPR <_1, { -1 }, { 0 }>;
Hmm, it should check vcond_mask_qiv1qi instead of vcond_mask_qiqi, I guess
since the backend doesn't supports v1qi, TYPE_MODE of V is QImode, then it
wrongly
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115406
--- Comment #4 from Hongtao Liu ---
>
> and for _2 = VIEW_CONVERT_EXPR(_1); we explicitly
> clear the upper bits due to PR113576, and then we get 1 hit the abort.
It's not VIEW_CONVERT_EXPR clear the uppper bits, but _1 = { -1 };
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115406
--- Comment #3 from Hongtao Liu ---
typedef __attribute__((__vector_size__ (1))) char V;
char
foo (V v)
{
return ((V) v == v)[0];
}
int
main ()
{
char x = foo ((V) { });
if (x != -1)
__builtin_abort ();
}
w/ vcond_mask_qiqi, it's
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115406
Hongtao Liu changed:
What|Removed |Added
Status|NEW |ASSIGNED
--- Comment #2 from Hongtao Liu
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115406
Sam James changed:
What|Removed |Added
Summary|[15 Regression] wrong code |[15 Regression] wrong code
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