[PATCH] Using gen_int_mode instead of GEN_INT to avoid ICE caused by type promotion.

Richard Sandiford richard.sandiford@arm.com
Fri Aug 21 09:44:02 GMT 2020


Hongtao Liu via Gcc-patches <gcc-patches@gcc.gnu.org> writes:
> ping ^ 4, it's a very simple fix for ICE.

OK, thanks.  (Reviewing on the basis that I agree it's a simple rtx
correctness fix.)

Richard

>
> On Mon, Aug 10, 2020 at 6:00 PM Hongtao Liu <crazylht@gmail.com> wrote:
>>
>> Ping^3
>>
>> On Tue, Aug 4, 2020 at 4:21 PM Hongtao Liu <crazylht@gmail.com> wrote:
>> >
>> > ping ^2
>> >
>> > On Mon, Jul 27, 2020 at 5:31 PM Hongtao Liu <crazylht@gmail.com> wrote:
>> > >
>> > > ping
>> > >
>> > > On Wed, Jul 22, 2020 at 3:57 PM Hongtao Liu <crazylht@gmail.com> wrote:
>> > > >
>> > > >   Bootstrap is ok, regression test is ok for i386 backend.
>> > > >
>> > > > gcc/
>> > > >         PR target/96262
>> > > >         * config/i386/i386-expand.c
>> > > >         (ix86_expand_vec_shift_qihi_constant): Refine.
>> > > >
>> > > > gcc/testsuite/
>> > > >         * gcc.target/i386/pr96262-1.c: New test.
>> > > >
>> > > > ---
>> > > >  gcc/config/i386/i386-expand.c             |  6 +++---
>> > > >  gcc/testsuite/gcc.target/i386/pr96262-1.c | 11 +++++++++++
>> > > >  2 files changed, 14 insertions(+), 3 deletions(-)
>> > > >  create mode 100644 gcc/testsuite/gcc.target/i386/pr96262-1.c
>> > > >
>> > > > diff --git a/gcc/config/i386/i386-expand.c b/gcc/config/i386/i386-expand.c
>> > > > index e194214804b..d57d043106a 100644
>> > > > --- a/gcc/config/i386/i386-expand.c
>> > > > +++ b/gcc/config/i386/i386-expand.c
>> > > > @@ -19537,7 +19537,7 @@ bool
>> > > >  ix86_expand_vec_shift_qihi_constant (enum rtx_code code, rtx dest,
>> > > > rtx op1, rtx op2)
>> > > >  {
>> > > >    machine_mode qimode, himode;
>> > > > -  unsigned int and_constant, xor_constant;
>> > > > +  HOST_WIDE_INT and_constant, xor_constant;
>> > > >    HOST_WIDE_INT shift_amount;
>> > > >    rtx vec_const_and, vec_const_xor;
>> > > >    rtx tmp, op1_subreg;
>> > > > @@ -19612,7 +19612,7 @@ ix86_expand_vec_shift_qihi_constant (enum
>> > > > rtx_code code, rtx dest, rtx op1, rtx
>> > > >    emit_move_insn (dest, simplify_gen_subreg (qimode, tmp, himode, 0));
>> > > >    emit_move_insn (vec_const_and,
>> > > >                   ix86_build_const_vector (qimode, true,
>> > > > -                                          GEN_INT (and_constant)));
>> > > > +                                          gen_int_mode (and_constant,
>> > > > QImode)));
>> > > >    emit_insn (gen_and (dest, dest, vec_const_and));
>> > > >
>> > > >    /* For ASHIFTRT, perform extra operation like
>> > > > @@ -19623,7 +19623,7 @@ ix86_expand_vec_shift_qihi_constant (enum
>> > > > rtx_code code, rtx dest, rtx op1, rtx
>> > > >        vec_const_xor = gen_reg_rtx (qimode);
>> > > >        emit_move_insn (vec_const_xor,
>> > > >                       ix86_build_const_vector (qimode, true,
>> > > > -                                              GEN_INT (xor_constant)));
>> > > > +                                              gen_int_mode
>> > > > (xor_constant, QImode)));
>> > > >        emit_insn (gen_xor (dest, dest, vec_const_xor));
>> > > >        emit_insn (gen_sub (dest, dest, vec_const_xor));
>> > > >      }
>> > > > diff --git a/gcc/testsuite/gcc.target/i386/pr96262-1.c
>> > > > b/gcc/testsuite/gcc.target/i386/pr96262-1.c
>> > > > new file mode 100644
>> > > > index 00000000000..1825388072e
>> > > > --- /dev/null
>> > > > +++ b/gcc/testsuite/gcc.target/i386/pr96262-1.c
>> > > > @@ -0,0 +1,11 @@
>> > > > +/* PR target/96262 */
>> > > > +/* { dg-do compile } */
>> > > > +/* { dg-options "-mavx512bw -O" } */
>> > > > +
>> > > > +typedef char __attribute__ ((__vector_size__ (64))) V;
>> > > > +
>> > > > +V
>> > > > +foo (V v)
>> > > > +{
>> > > > +  return ~(v << 1);
>> > > > +}
>> > > > --
>> > > >
>> > > > --
>> > > > BR,
>> > > > Hongtao
>> > >
>> > >
>> > >
>> > > --
>> > > BR,
>> > > Hongtao
>> >
>> >
>> >
>> > --
>> > BR,
>> > Hongtao
>>
>>
>>
>> --
>> BR,
>> Hongtao


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