diff options
| -rw-r--r-- | gcc/ChangeLog | 17 | ||||
| -rw-r--r-- | gcc/cse.c | 8 | ||||
| -rw-r--r-- | gcc/optabs.c | 22 |
3 files changed, 44 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d5e54a9..5859517 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,20 @@ +2003-10-10 Roger Sayle <roger@eyesopen.com> + + * cse.c (constant_pool_entries_regcost): New global variable to + hold the register cost component of constant_pool_entries_cost. + (fold_rtx): Calculate constant_pool_entries_regcost at the same + time as constant_pool_entries_cost. + (cse_insn): Set both src_folded_cost and src_folded_regcost from + constant_pool_entries_cost and constant_pool_entries_regcost. + (cse_main): Initialize constant_pool_entries_regcost to zero. + + * optabs.c (expand_unop): Attach a REG_EQUAL note describing + the semantics of the sequence of bit operations used to negate + a floating-point value. + (expand_abs_nojump): Likewise attach a REG_EQUAL note describing + the semantics of the bit operations used to abs a floating point + value. + 2003-10-11 Bernardo Innocenti <bernie@develer.com> Paul Dale <pauli@snapgear.com> @@ -569,6 +569,7 @@ static struct table_elt *last_jump_equiv_class; the insn. */ static int constant_pool_entries_cost; +static int constant_pool_entries_regcost; /* This data describes a block that will be processed by cse_basic_block. */ @@ -3529,7 +3530,10 @@ fold_rtx (rtx x, rtx insn) rtx new; if (CONSTANT_P (constant) && GET_CODE (constant) != CONST_INT) - constant_pool_entries_cost = COST (constant); + { + constant_pool_entries_cost = COST (constant); + constant_pool_entries_regcost = approx_reg_cost (constant); + } /* If we are loading the full constant, we have an equivalence. */ if (offset == 0 && mode == const_mode) @@ -5507,6 +5511,7 @@ cse_insn (rtx insn, rtx libcall_insn) src_folded_force_flag = 1; src_folded = trial; src_folded_cost = constant_pool_entries_cost; + src_folded_regcost = constant_pool_entries_regcost; } } @@ -6939,6 +6944,7 @@ cse_main (rtx f, int nregs, int after_loop, FILE *file) cse_jumps_altered = 0; recorded_label_ref = 0; constant_pool_entries_cost = 0; + constant_pool_entries_regcost = 0; val.path_size = 0; init_recog (); diff --git a/gcc/optabs.c b/gcc/optabs.c index e29c92a..10a3809 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -2615,7 +2615,16 @@ expand_unop (enum machine_mode mode, optab unoptab, rtx op0, rtx target, immed_double_const (lo, hi, imode), NULL_RTX, 1, OPTAB_LIB_WIDEN); if (temp != 0) - return gen_lowpart (mode, temp); + { + rtx insn; + if (target == 0) + target = gen_reg_rtx (mode); + insn = emit_move_insn (target, gen_lowpart (mode, temp)); + set_unique_reg_note (insn, REG_EQUAL, + gen_rtx_fmt_e (NEG, mode, + copy_rtx (op0))); + return target; + } delete_insns_since (last); } } @@ -2790,7 +2799,16 @@ expand_abs_nojump (enum machine_mode mode, rtx op0, rtx target, immed_double_const (~lo, ~hi, imode), NULL_RTX, 1, OPTAB_LIB_WIDEN); if (temp != 0) - return gen_lowpart (mode, temp); + { + rtx insn; + if (target == 0) + target = gen_reg_rtx (mode); + insn = emit_move_insn (target, gen_lowpart (mode, temp)); + set_unique_reg_note (insn, REG_EQUAL, + gen_rtx_fmt_e (ABS, mode, + copy_rtx (op0))); + return target; + } delete_insns_since (last); } } |