From b5a6addb5b60ff6232d1e11367b44f969d2a3e8f Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Tue, 27 Aug 2019 12:46:07 +0000 Subject: [PATCH] 2019-08-27 Richard Biener * config/i386/i386-features.h (general_scalar_chain::~general_scalar_chain): Add. (general_scalar_chain::insns_conv): New bitmap. (general_scalar_chain::n_sse_to_integer): New. (general_scalar_chain::n_integer_to_sse): Likewise. (general_scalar_chain::make_vector_copies): Adjust signature. * config/i386/i386-features.c (general_scalar_chain::general_scalar_chain): Outline, initialize new members. (general_scalar_chain::~general_scalar_chain): New. (general_scalar_chain::mark_dual_mode_def): Record insns we need to insert conversions at and count them. (general_scalar_chain::compute_convert_gain): Account for conversion instructions at chain boundary. (general_scalar_chain::make_vector_copies): Generate a single copy for a def by a specific insn. (general_scalar_chain::convert_registers): First populate defs_map, then make copies at out-of chain insns. From-SVN: r274953 --- gcc/ChangeLog | 21 +++++ gcc/config/i386/i386-features.c | 172 +++++++++++++++++++++------------------- gcc/config/i386/i386-features.h | 9 ++- 3 files changed, 119 insertions(+), 83 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b7c0fbe..65f9db9 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,24 @@ +2019-08-27 Richard Biener + + * config/i386/i386-features.h + (general_scalar_chain::~general_scalar_chain): Add. + (general_scalar_chain::insns_conv): New bitmap. + (general_scalar_chain::n_sse_to_integer): New. + (general_scalar_chain::n_integer_to_sse): Likewise. + (general_scalar_chain::make_vector_copies): Adjust signature. + * config/i386/i386-features.c + (general_scalar_chain::general_scalar_chain): Outline, + initialize new members. + (general_scalar_chain::~general_scalar_chain): New. + (general_scalar_chain::mark_dual_mode_def): Record insns + we need to insert conversions at and count them. + (general_scalar_chain::compute_convert_gain): Account + for conversion instructions at chain boundary. + (general_scalar_chain::make_vector_copies): Generate a single + copy for a def by a specific insn. + (general_scalar_chain::convert_registers): First populate + defs_map, then make copies at out-of chain insns. + 2019-08-27 Richard Earnshaw * config/arm/arm.md (stack_protect_set_insn): Add security-related diff --git a/gcc/config/i386/i386-features.c b/gcc/config/i386/i386-features.c index 5891584..9505b4a 100644 --- a/gcc/config/i386/i386-features.c +++ b/gcc/config/i386/i386-features.c @@ -320,6 +320,20 @@ scalar_chain::add_to_queue (unsigned insn_uid) bitmap_set_bit (queue, insn_uid); } +general_scalar_chain::general_scalar_chain (enum machine_mode smode_, + enum machine_mode vmode_) + : scalar_chain (smode_, vmode_) +{ + insns_conv = BITMAP_ALLOC (NULL); + n_sse_to_integer = 0; + n_integer_to_sse = 0; +} + +general_scalar_chain::~general_scalar_chain () +{ + BITMAP_FREE (insns_conv); +} + /* For DImode conversion, mark register defined by DEF as requiring conversion. */ @@ -328,15 +342,27 @@ general_scalar_chain::mark_dual_mode_def (df_ref def) { gcc_assert (DF_REF_REG_DEF_P (def)); - if (bitmap_bit_p (defs_conv, DF_REF_REGNO (def))) - return; - + /* Record the def/insn pair so we can later efficiently iterate over + the defs to convert on insns not in the chain. */ + bool reg_new = bitmap_set_bit (defs_conv, DF_REF_REGNO (def)); + if (!bitmap_bit_p (insns, DF_REF_INSN_UID (def))) + { + if (!bitmap_set_bit (insns_conv, DF_REF_INSN_UID (def)) + && !reg_new) + return; + n_integer_to_sse++; + } + else + { + if (!reg_new) + return; + n_sse_to_integer++; + } + if (dump_file) fprintf (dump_file, " Mark r%d def in insn %d as requiring both modes in chain #%d\n", DF_REF_REGNO (def), DF_REF_INSN_UID (def), chain_id); - - bitmap_set_bit (defs_conv, DF_REF_REGNO (def)); } /* For TImode conversion, it is unused. */ @@ -523,7 +549,7 @@ general_scalar_chain::compute_convert_gain () || GET_CODE (src) == ASHIFTRT || GET_CODE (src) == LSHIFTRT) { - if (CONST_INT_P (XEXP (src, 0))) + if (CONST_INT_P (XEXP (src, 0))) igain -= vector_const_cost (XEXP (src, 0)); igain += m * ix86_cost->shift_const - ix86_cost->sse_op; if (INTVAL (XEXP (src, 1)) >= 32) @@ -588,9 +614,12 @@ general_scalar_chain::compute_convert_gain () if (dump_file) fprintf (dump_file, " Instruction conversion gain: %d\n", gain); - /* ??? What about integer to SSE? */ - EXECUTE_IF_SET_IN_BITMAP (defs_conv, 0, insn_uid, bi) - cost += DF_REG_DEF_COUNT (insn_uid) * ix86_cost->sse_to_integer; + /* Cost the integer to sse and sse to integer moves. */ + cost += n_sse_to_integer * ix86_cost->sse_to_integer; + /* ??? integer_to_sse but we only have that in the RA cost table. + Assume sse_to_integer/integer_to_sse are the same which they + are at the moment. */ + cost += n_integer_to_sse * ix86_cost->sse_to_integer; if (dump_file) fprintf (dump_file, " Registers conversion cost: %d\n", cost); @@ -649,85 +678,64 @@ gen_gpr_to_xmm_move_src (enum machine_mode vmode, rtx gpr) and replace its uses in a chain. */ void -general_scalar_chain::make_vector_copies (unsigned regno) +general_scalar_chain::make_vector_copies (rtx_insn *insn, rtx reg) { - rtx reg = regno_reg_rtx[regno]; - rtx vreg = gen_reg_rtx (smode); - df_ref ref; - - defs_map.put (reg, vreg); + rtx vreg = *defs_map.get (reg); - /* For each insn defining REGNO, see if it is defined by an insn - not part of the chain but with uses in insns part of the chain - and insert a copy in that case. */ - for (ref = DF_REG_DEF_CHAIN (regno); ref; ref = DF_REF_NEXT_REG (ref)) + start_sequence (); + if (!TARGET_INTER_UNIT_MOVES_TO_VEC) { - if (bitmap_bit_p (insns, DF_REF_INSN_UID (ref))) - continue; - df_link *use; - for (use = DF_REF_CHAIN (ref); use; use = use->next) - if (!DF_REF_REG_MEM_P (use->ref) - && bitmap_bit_p (insns, DF_REF_INSN_UID (use->ref))) - break; - if (!use) - continue; - - start_sequence (); - if (!TARGET_INTER_UNIT_MOVES_TO_VEC) + rtx tmp = assign_386_stack_local (smode, SLOT_STV_TEMP); + if (smode == DImode && !TARGET_64BIT) { - rtx tmp = assign_386_stack_local (smode, SLOT_STV_TEMP); - if (smode == DImode && !TARGET_64BIT) - { - emit_move_insn (adjust_address (tmp, SImode, 0), - gen_rtx_SUBREG (SImode, reg, 0)); - emit_move_insn (adjust_address (tmp, SImode, 4), - gen_rtx_SUBREG (SImode, reg, 4)); - } - else - emit_move_insn (copy_rtx (tmp), reg); - emit_insn (gen_rtx_SET (gen_rtx_SUBREG (vmode, vreg, 0), - gen_gpr_to_xmm_move_src (vmode, tmp))); + emit_move_insn (adjust_address (tmp, SImode, 0), + gen_rtx_SUBREG (SImode, reg, 0)); + emit_move_insn (adjust_address (tmp, SImode, 4), + gen_rtx_SUBREG (SImode, reg, 4)); } - else if (!TARGET_64BIT && smode == DImode) + else + emit_move_insn (copy_rtx (tmp), reg); + emit_insn (gen_rtx_SET (gen_rtx_SUBREG (vmode, vreg, 0), + gen_gpr_to_xmm_move_src (vmode, tmp))); + } + else if (!TARGET_64BIT && smode == DImode) + { + if (TARGET_SSE4_1) { - if (TARGET_SSE4_1) - { - emit_insn (gen_sse2_loadld (gen_rtx_SUBREG (V4SImode, vreg, 0), - CONST0_RTX (V4SImode), - gen_rtx_SUBREG (SImode, reg, 0))); - emit_insn (gen_sse4_1_pinsrd (gen_rtx_SUBREG (V4SImode, vreg, 0), - gen_rtx_SUBREG (V4SImode, vreg, 0), - gen_rtx_SUBREG (SImode, reg, 4), - GEN_INT (2))); - } - else - { - rtx tmp = gen_reg_rtx (DImode); - emit_insn (gen_sse2_loadld (gen_rtx_SUBREG (V4SImode, vreg, 0), - CONST0_RTX (V4SImode), - gen_rtx_SUBREG (SImode, reg, 0))); - emit_insn (gen_sse2_loadld (gen_rtx_SUBREG (V4SImode, tmp, 0), - CONST0_RTX (V4SImode), - gen_rtx_SUBREG (SImode, reg, 4))); - emit_insn (gen_vec_interleave_lowv4si - (gen_rtx_SUBREG (V4SImode, vreg, 0), - gen_rtx_SUBREG (V4SImode, vreg, 0), - gen_rtx_SUBREG (V4SImode, tmp, 0))); - } + emit_insn (gen_sse2_loadld (gen_rtx_SUBREG (V4SImode, vreg, 0), + CONST0_RTX (V4SImode), + gen_rtx_SUBREG (SImode, reg, 0))); + emit_insn (gen_sse4_1_pinsrd (gen_rtx_SUBREG (V4SImode, vreg, 0), + gen_rtx_SUBREG (V4SImode, vreg, 0), + gen_rtx_SUBREG (SImode, reg, 4), + GEN_INT (2))); } else - emit_insn (gen_rtx_SET (gen_rtx_SUBREG (vmode, vreg, 0), - gen_gpr_to_xmm_move_src (vmode, reg))); - rtx_insn *seq = get_insns (); - end_sequence (); - rtx_insn *insn = DF_REF_INSN (ref); - emit_conversion_insns (seq, insn); - - if (dump_file) - fprintf (dump_file, - " Copied r%d to a vector register r%d for insn %d\n", - regno, REGNO (vreg), INSN_UID (insn)); + { + rtx tmp = gen_reg_rtx (DImode); + emit_insn (gen_sse2_loadld (gen_rtx_SUBREG (V4SImode, vreg, 0), + CONST0_RTX (V4SImode), + gen_rtx_SUBREG (SImode, reg, 0))); + emit_insn (gen_sse2_loadld (gen_rtx_SUBREG (V4SImode, tmp, 0), + CONST0_RTX (V4SImode), + gen_rtx_SUBREG (SImode, reg, 4))); + emit_insn (gen_vec_interleave_lowv4si + (gen_rtx_SUBREG (V4SImode, vreg, 0), + gen_rtx_SUBREG (V4SImode, vreg, 0), + gen_rtx_SUBREG (V4SImode, tmp, 0))); + } } + else + emit_insn (gen_rtx_SET (gen_rtx_SUBREG (vmode, vreg, 0), + gen_gpr_to_xmm_move_src (vmode, reg))); + rtx_insn *seq = get_insns (); + end_sequence (); + emit_conversion_insns (seq, insn); + + if (dump_file) + fprintf (dump_file, + " Copied r%d to a vector register r%d for insn %d\n", + REGNO (reg), REGNO (vreg), INSN_UID (insn)); } /* Copy the definition SRC of INSN inside the chain to DST for @@ -1158,7 +1166,11 @@ general_scalar_chain::convert_registers () bitmap_iterator bi; unsigned id; EXECUTE_IF_SET_IN_BITMAP (defs_conv, 0, id, bi) - make_vector_copies (id); + defs_map.put (regno_reg_rtx[id], gen_reg_rtx (smode)); + EXECUTE_IF_SET_IN_BITMAP (insns_conv, 0, id, bi) + for (df_ref ref = DF_INSN_UID_DEFS (id); ref; ref = DF_REF_NEXT_LOC (ref)) + if (bitmap_bit_p (defs_conv, DF_REF_REGNO (ref))) + make_vector_copies (DF_REF_INSN (ref), DF_REF_REAL_REG (ref)); } /* Convert whole chain creating required register diff --git a/gcc/config/i386/i386-features.h b/gcc/config/i386/i386-features.h index 8381efe..09fe340 100644 --- a/gcc/config/i386/i386-features.h +++ b/gcc/config/i386/i386-features.h @@ -167,16 +167,19 @@ class scalar_chain class general_scalar_chain : public scalar_chain { public: - general_scalar_chain (enum machine_mode smode_, enum machine_mode vmode_) - : scalar_chain (smode_, vmode_) {} + general_scalar_chain (enum machine_mode smode_, enum machine_mode vmode_); + ~general_scalar_chain (); int compute_convert_gain (); private: hash_map defs_map; + bitmap insns_conv; + unsigned n_sse_to_integer; + unsigned n_integer_to_sse; void mark_dual_mode_def (df_ref def); void convert_insn (rtx_insn *insn); void convert_op (rtx *op, rtx_insn *insn); void convert_reg (rtx_insn *insn, rtx dst, rtx src); - void make_vector_copies (unsigned regno); + void make_vector_copies (rtx_insn *, rtx); void convert_registers (); int vector_const_cost (rtx exp); }; -- 2.7.4