On Tue, Jun 20, 2023 at 11:02 AM Hongtao Liu <crazy...@gmail.com> wrote: > > On Tue, Jun 20, 2023 at 4:41 PM Richard Biener > <richard.guent...@gmail.com> wrote: > > > > On Fri, Jun 2, 2023 at 3:01 AM liuhongt via Gcc-patches > > <gcc-patches@gcc.gnu.org> wrote: > > > > > > We have already use intermidate type in case WIDEN, but not for NONE, > > > this patch extended that. > > > > > > I didn't do that in pattern recog since we need to know whether the > > > stmt belongs to any slp_node to decide the vectype, the related optabs > > > are checked according to vectype_in and vectype_out. For non-slp case, > > > vec_pack/unpack are always used when lhs has different size from rhs, > > > for slp case, sometimes vec_pack/unpack is used, somethings > > > direct conversion is used. > > > > > > Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}. > > > Ok for trunk? > > > > > > gcc/ChangeLog: > > > > > > PR target/110018 > > > * tree-vect-stmts.cc (vectorizable_conversion): Use > > > intermiediate integer type for float_expr/fix_trunc_expr when > > > direct optab is not existed. > > > > > > gcc/testsuite/ChangeLog: > > > > > > * gcc.target/i386/pr110018-1.c: New test. > > > --- > > > gcc/testsuite/gcc.target/i386/pr110018-1.c | 94 ++++++++++++++++++++++ > > > gcc/tree-vect-stmts.cc | 56 ++++++++++++- > > > 2 files changed, 149 insertions(+), 1 deletion(-) > > > create mode 100644 gcc/testsuite/gcc.target/i386/pr110018-1.c > > > > > > diff --git a/gcc/testsuite/gcc.target/i386/pr110018-1.c > > > b/gcc/testsuite/gcc.target/i386/pr110018-1.c > > > new file mode 100644 > > > index 00000000000..b1baffd7af1 > > > --- /dev/null > > > +++ b/gcc/testsuite/gcc.target/i386/pr110018-1.c > > > @@ -0,0 +1,94 @@ > > > +/* { dg-do compile } */ > > > +/* { dg-options "-mavx512fp16 -mavx512vl -O2 -mavx512dq" } */ > > > +/* { dg-final { scan-assembler-times {(?n)vcvttp[dsh]2[dqw]} 5 } } */ > > > +/* { dg-final { scan-assembler-times {(?n)vcvt[dqw]*2p[dsh]} 5 } } */ > > > + > > > +void > > > +foo (double* __restrict a, char* b) > > > +{ > > > + a[0] = b[0]; > > > + a[1] = b[1]; > > > +} > > > + > > > +void > > > +foo1 (float* __restrict a, char* b) > > > +{ > > > + a[0] = b[0]; > > > + a[1] = b[1]; > > > + a[2] = b[2]; > > > + a[3] = b[3]; > > > +} > > > + > > > +void > > > +foo2 (_Float16* __restrict a, char* b) > > > +{ > > > + a[0] = b[0]; > > > + a[1] = b[1]; > > > + a[2] = b[2]; > > > + a[3] = b[3]; > > > + a[4] = b[4]; > > > + a[5] = b[5]; > > > + a[6] = b[6]; > > > + a[7] = b[7]; > > > +} > > > + > > > +void > > > +foo3 (double* __restrict a, short* b) > > > +{ > > > + a[0] = b[0]; > > > + a[1] = b[1]; > > > +} > > > + > > > +void > > > +foo4 (float* __restrict a, char* b) > > > +{ > > > + a[0] = b[0]; > > > + a[1] = b[1]; > > > + a[2] = b[2]; > > > + a[3] = b[3]; > > > +} > > > + > > > +void > > > +foo5 (double* __restrict b, char* a) > > > +{ > > > + a[0] = b[0]; > > > + a[1] = b[1]; > > > +} > > > + > > > +void > > > +foo6 (float* __restrict b, char* a) > > > +{ > > > + a[0] = b[0]; > > > + a[1] = b[1]; > > > + a[2] = b[2]; > > > + a[3] = b[3]; > > > +} > > > + > > > +void > > > +foo7 (_Float16* __restrict b, char* a) > > > +{ > > > + a[0] = b[0]; > > > + a[1] = b[1]; > > > + a[2] = b[2]; > > > + a[3] = b[3]; > > > + a[4] = b[4]; > > > + a[5] = b[5]; > > > + a[6] = b[6]; > > > + a[7] = b[7]; > > > +} > > > + > > > +void > > > +foo8 (double* __restrict b, short* a) > > > +{ > > > + a[0] = b[0]; > > > + a[1] = b[1]; > > > +} > > > + > > > +void > > > +foo9 (float* __restrict b, char* a) > > > +{ > > > + a[0] = b[0]; > > > + a[1] = b[1]; > > > + a[2] = b[2]; > > > + a[3] = b[3]; > > > +} > > > diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc > > > index bd3b07a3aa1..1118c89686d 100644 > > > --- a/gcc/tree-vect-stmts.cc > > > +++ b/gcc/tree-vect-stmts.cc > > > @@ -5162,6 +5162,49 @@ vectorizable_conversion (vec_info *vinfo, > > > return false; > > > if (supportable_convert_operation (code, vectype_out, vectype_in, > > > &code1)) > > > break; > > > > A comment would be nice here. Like > > > > /* For conversions between float and smaller integer types try whether > > we can > > use intermediate signed integer types to support the conversion. */ > > > > > + if ((code == FLOAT_EXPR > > > + && GET_MODE_SIZE (lhs_mode) > GET_MODE_SIZE (rhs_mode)) > > > + || (code == FIX_TRUNC_EXPR > > > + && GET_MODE_SIZE (rhs_mode) > GET_MODE_SIZE (lhs_mode))) > > > + { > > > + bool float_expr_p = code == FLOAT_EXPR; > > > + scalar_mode imode = float_expr_p ? rhs_mode : lhs_mode; > > > + fltsz = GET_MODE_SIZE (float_expr_p ? lhs_mode : rhs_mode); > > > + code1 = float_expr_p ? code : NOP_EXPR; > > > + codecvt1 = float_expr_p ? NOP_EXPR : code; > > > + FOR_EACH_2XWIDER_MODE (rhs_mode_iter, imode) > > > + { > > > + imode = rhs_mode_iter.require (); > > > + if (GET_MODE_SIZE (imode) > fltsz) > > > + break; > > > + > > > + cvt_type > > > + = build_nonstandard_integer_type (GET_MODE_BITSIZE > > > (imode), > > > + 0); > > > + cvt_type = get_vectype_for_scalar_type (vinfo, cvt_type, > > > + slp_node); > > > + /* This should only happened for SLP as long as loop > > > vectorizer > > > + only supports same-sized vector. */ > > > + if (cvt_type == NULL_TREE > > > + || maybe_ne (TYPE_VECTOR_SUBPARTS (cvt_type), nunits_in) > > > + || !supportable_convert_operation (code1, vectype_out, > > > + cvt_type, &code1) > > > + || !supportable_convert_operation (codecvt1, cvt_type, > > > + vectype_in, > > > &codecvt1)) > > > + continue; > > > + > > > + found_mode = true; > > > + break; > > > + } > > > + > > > + if (found_mode) > > > + { > > > + multi_step_cvt++; > > > + interm_types.safe_push (cvt_type); > > > + cvt_type = NULL_TREE; > > > + break; > > > + } > > > + } > > > /* FALLTHRU */ > > > unsupported: > > > if (dump_enabled_p ()) > > > @@ -5381,7 +5424,18 @@ vectorizable_conversion (vec_info *vinfo, > > > { > > > /* Arguments are ready, create the new vector stmt. */ > > > gcc_assert (TREE_CODE_LENGTH (code1) == unary_op); > > > - gassign *new_stmt = gimple_build_assign (vec_dest, code1, vop0); > > > + gassign* new_stmt; > > > + if (multi_step_cvt) > > > + { > > > + gcc_assert (multi_step_cvt == 1); > > > + new_stmt = gimple_build_assign (vec_dest, codecvt1, vop0); > > > + new_temp = make_ssa_name (vec_dest, new_stmt); > > > > I wonder how you get away with using vec_dest both for the final and the > > intermediate conversion and not involve interm_types[0]? > interm_types[0] is assigned to vect_dest, the original > vect_dest(vectype_out) is pushed to vec_dsts. > > auto_vec<tree> vec_dsts (multi_step_cvt + 1); > vec_dest = vect_create_destination_var (scalar_dest, > (cvt_type && modifier == WIDEN) > ? cvt_type : vectype_out); > vec_dsts.quick_push (vec_dest); > > if (multi_step_cvt) > { > for (i = interm_types.length () - 1; > interm_types.iterate (i, &intermediate_type); i--) > { > vec_dest = vect_create_destination_var (scalar_dest, > intermediate_type); > vec_dsts.quick_push (vec_dest); > } > } > > > > > Otherwise looks good. > Thanks for review. > > > > Thanks, > > Richard. > > > > > + gimple_assign_set_lhs (new_stmt, new_temp); > > > + vect_finish_stmt_generation (vinfo, stmt_info, new_stmt, > > > gsi); > > > + vop0 = new_temp; > > > + vec_dest = vec_dsts[0]; > And it's assigned back to vec_dest here.
Ah, subtle. So the patch is OK with the added comment. Thanks, Richard. > > > + } > > > + new_stmt = gimple_build_assign (vec_dest, code1, vop0); > > > new_temp = make_ssa_name (vec_dest, new_stmt); > > > gimple_assign_set_lhs (new_stmt, new_temp); > > > vect_finish_stmt_generation (vinfo, stmt_info, new_stmt, gsi); > > > -- > > > 2.39.1.388.g2fc9e9ca3c > > > > > > > -- > BR, > Hongtao