https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124250
Xi Ruoyao <xry111 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=123521
Component|target |middle-end
--- Comment #1 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
Regressed since r15-10678 (PR 123521 fix) but I don't think it's the root
cause.
It looks like when expand_binop() calls expand_vector_broadcast() the
precondition of expand_vector_broadcast() is violated:
(gdb) fr 10
#10 0x000000000166541b in expand_vector_broadcast (vmode=E_V2DImode,
op=0x7ffff56c1d50) at ../../gcc-backport/gcc/optabs.cc:465
465 emit_insn (GEN_FCN (icode) (ret, gen_rtx_PARALLEL (vmode, vec)));
(gdb) fr 11
#11 0x00000000016690a9 in expand_binop (mode=E_V2DImode, binoptab=ashr_optab,
op0=0x7ffff56c1d08, op1=0x7ffff56c1d50, target=0x0, unsignedp=0,
methods=OPTAB_DIRECT) at ../../gcc-backport/gcc/optabs.cc:1635
1635 rtx vop1 = expand_vector_broadcast (mode, op1);
(gdb) call debug_rtx(op1)
(reg:SI 180 [ Offset_110 ])
(gdb) p mode
$1 = E_V2DImode
But we have a comment above expand_vector_broadcast stating the mode of op must
be the element mode of vmode.
