diff options
Diffstat (limited to 'gcc/expmed.cc')
| -rw-r--r-- | gcc/expmed.cc | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/gcc/expmed.cc b/gcc/expmed.cc index 8cf10d9..be427dc 100644 --- a/gcc/expmed.cc +++ b/gcc/expmed.cc @@ -3938,8 +3938,7 @@ expmed_mult_highpart_optab (scalar_int_mode mode, rtx op0, rtx op1, wop1 = convert_modes (wider_mode, mode, op1, unsignedp); tem = expand_binop (wider_mode, smul_optab, wop0, wop1, 0, unsignedp, OPTAB_WIDEN); - insns = get_insns (); - end_sequence (); + insns = end_sequence (); if (tem) { @@ -4182,8 +4181,7 @@ expand_sdiv_pow2 (scalar_int_mode mode, rtx op0, HOST_WIDE_INT d) temp, temp2, mode, 0); if (temp2) { - rtx_insn *seq = get_insns (); - end_sequence (); + rtx_insn *seq = end_sequence (); emit_insn (seq); return expand_shift (RSHIFT_EXPR, mode, temp2, logd, NULL_RTX, 0); } @@ -6326,7 +6324,8 @@ expand_rotate_as_vec_perm (machine_mode mode, rtx dst, rtx x, rtx amt) qimode, perm_dst); if (!res) return NULL_RTX; - emit_move_insn (dst, lowpart_subreg (mode, res, qimode)); + if (!rtx_equal_p (res, perm_dst)) + emit_move_insn (dst, lowpart_subreg (mode, res, qimode)); return dst; } @@ -6410,18 +6409,25 @@ canonicalize_comparison (machine_mode mode, enum rtx_code *code, rtx *imm) if (overflow) return; - /* The following creates a pseudo; if we cannot do that, bail out. */ - if (!can_create_pseudo_p ()) - return; - - rtx reg = gen_rtx_REG (mode, LAST_VIRTUAL_REGISTER + 1); rtx new_imm = immed_wide_int_const (imm_modif, mode); - rtx_insn *old_rtx = gen_move_insn (reg, *imm); - rtx_insn *new_rtx = gen_move_insn (reg, new_imm); + int old_cost = rtx_cost (*imm, mode, COMPARE, 0, true); + int new_cost = rtx_cost (new_imm, mode, COMPARE, 0, true); + + if (dump_file && (dump_flags & TDF_DETAILS)) + { + fprintf (dump_file, ";; cmp: %s, old cst: ", + GET_RTX_NAME (*code)); + print_rtl (dump_file, *imm); + fprintf (dump_file, " new cst: "); + print_rtl (dump_file, new_imm); + fprintf (dump_file, "\n"); + fprintf (dump_file, ";; old cst cost: %d, new cst cost: %d\n", + old_cost, new_cost); + } /* Update the immediate and the code. */ - if (insn_cost (old_rtx, true) > insn_cost (new_rtx, true)) + if (old_cost > new_cost) { *code = equivalent_cmp_code (*code); *imm = new_imm; |