https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70396
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-03-24
Component|rtl-optimization |tree-optimization
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
604 /* Allow truncation but not extension since we do not know if the
605 number is signed or unsigned. */
606 gcc_assert (prec <= v.get_precision ());
607
608 if (len < 2 || prec <= HOST_BITS_PER_WIDE_INT)
609 return gen_int_mode (v.elt (0), mode);
610
(gdb) p prec
$1 = 8
(gdb) p mode
$2 = QImode
(gdb) p v.get_precision ()
$3 = 3
we indeed have
<integer_type 0x7ffff698b2a0 sizes-gimplified public QI
size <integer_cst 0x7ffff6887d98 type <integer_type 0x7ffff688b2a0
bitsizetype> constant 8>
unit size <integer_cst 0x7ffff6887db0 type <integer_type 0x7ffff688b1f8
sizetype> constant 1>
align 8 symtab 0 alias set 2 canonical type 0x7ffff698b2a0 precision 3 min
<integer_cst 0x7ffff68a42b8 -4> max <integer_cst 0x7ffff699b2a0 3>>
$7 = void
constants in the VECTOR_CST we expand and it has a vector type with
bit-precision element type.
