(distribute_links): Set it.
(if_then_else_cond): New function.
(try_combine): Return added_links_insn if it is earlier than what we would
otherwise return.
(subst): Generalize (OP X Y) to call if_then_else_cond instead of only
checking for an explicit IF_THEN_ELSE.
(subst, case IF_THEN_ELSE): When converting to a MULT, simplify the MULT
before putting it into OP.
(subst, case AND): Don't make IF_THEN_ELSE here; now made in generic case
earlier.
From-SVN: r6343
Set it for special case of substituting i3 into i2. Use it near
end to detect when special case succeeded. Move i2notes to
i3notes for this special case.
(distribute_notes, REG_UNUSED case): Ignore all REG_UNUSED notes
except those from I3.
From-SVN: r5639
(subst, force_to_mode, nonzero_bits, num_sign_bit_copies): Use new
macros LOAD_EXTEND_OP and WORD_REGISTER_OPERATION instead of
BYTE_LOADS_*_EXTEND and LOAD_EXTEND.
From-SVN: r5473
* combine.c: (combinable_i3_pat): Don't add REG_DEAD notes for
HARD_FRAME_POINTER_REGNUM.
(subst, case SUBREG): Don't change register number or mode if it
is HARD_FRAME_POINTER_REGNUM.
From-SVN: r5450
(combine_instructions): Use it.
(force_to_mode): Narrow mask to fit mode (except VOIDmode).
(record_value_for_reg): When zeroing reg_last_set_value, also
zero reg_last_set_{mode,nonzero_bits,sign_bit_copies}.
(record_dead_and_set_regs): Likewise.
From-SVN: r5430
(make_compound_operation): Handle the case
(and (xor/ior (lshift...) (lshift...)) ...).
(make_field_assignment): In get_pos_from_mask call, only invert
bits in mode mask.
From-SVN: r5237
(nonzero_bits): Fix reversed test for when we need to insert extra bits when
sizes differ.
(nonzero_bits, case EQ): Always return STORE_FLAG_VALUE when returning integer
mode; remove now-redundant test.
From-SVN: r5221
(subst): Instead, do it here, but also allow it in as a nested SUBREG since
the inner one will be eliminated.
(simplify_and_const_int): Convert (and (neg X) (const_int 1)) to a shift
when X is known to be either 0 or 1.
From-SVN: r5187
(try_combine): Don't split a PARALLEL of a SIGN_EXTEND and the object
being sign extended if we have made assumptions about the form the
I2DEST.
From-SVN: r5184
generalize appropriately.
Move most cases from simplify_and_const_int in.
(simplify_and_const_int): Remove most code from here; call force_to_mode
instead.
(subst, make_extraction, make_compound_operation): Change calls to
force_to_mode.
(make_field_assignment): Likewise.
(simplify_comparison): Add call to force_to_mode when doing a sign bit
comparison.
From-SVN: r5060
(subst): Move simple operations inside IF_THEN_ELSE if the IF_THEN_ELSE is in
the second operand as well as the first.
(subst, case NEG): Use plus_constant to make a PLUS.
(subst, case MINUS): Simplify (minus 1 (comparison foo bar)).
(subst, case EQ): Add a number of missing cases where comparisons may be
replaced with arithmetic or logical ops.
(subst, case IF_THEN_ELSE): Handle (if_then_else COND (OP Z C1) Z) in a more
general manner.
(simplify_and_const_int): Make AND with gen_binary in case we can simplify it.
From-SVN: r5056
(this_basic_block): New variable.
(combine_instructions): Set it.
(try_combine, distribute_links): Use it and basic_block_head to see if
we've gone to a new basic block instead of trying to reproduce
calculation done in flow.
From-SVN: r5044
(subst, case IF_THEN_ELSE): Add missing arg to make_compound_operation.
(make_compound_operation, case ASHIFTRT): Delete extra gen_unary arg.
From-SVN: r4945
