(true_dependence): An unchanging read is guaranteed independent of a store only if the store is not unchanging.

(true_dependence): An unchanging read is guaranteed
independent of a store only if the store is not unchanging.
(anti_dependence): Added comment about unchanging reads.
(sched_analyze_2): Don't ignore unchanging reads, they may be
dependent on unchanging writes.

From-SVN: r1777

Correct DEFINE_SPLITs added Jul 27.  They would
overwrite the input register if it was the same as the result reg.

From-SVN: r1776

"__gcc_mcount".

(TARGET_SWITCHES): New switch "no-bss" which forces gcc not
use make use of the bss subspace.  (For compatability with old
buggy versions of gas.)
(ASM_FILE_START): Add $BSS$ subspace.
(BSS_SECTION_ASM_OP): New macro which tells the assembler to
switch to the bss subspace.
(EXTRA_SECTIONS): Define in_bss as an extra section.
(EXTRA_SECTION_FUNCTIONS): Define "bss_section" function to switch
into the bss subspace.
(ASM_OUTPUT_COMMON): If !TARGET_NO_BSS, then place commons into
the bss subspace.
(ASM_OUTPUT_LOCAL): Likewise.

From-SVN: r1775

        (secondary_reload_class): Bug fix.
        (arith32_operand): New function.

From-SVN: r1774

From-SVN: r1773

From-SVN: r1772

From-SVN: r1771

	CTORS_SECTION_FUNCTION and DTORS_SECTION_FUNCTION.

From-SVN: r1770

From-SVN: r1769

        * cp-tree.h, tree.h:  Moved definitions of TREE_VIA_* into tree.h for
        consistency.

From-SVN: r1768

From-SVN: r1767

From-SVN: r1766

From-SVN: r1765

From-SVN: r1764

From-SVN: r1763

From-SVN: r1762

From-SVN: r1761

(install-proto): Target deleted.

From-SVN: r1760

From-SVN: r1759

reload is in progress.

From-SVN: r1758

preserve_subexpressions_p.

From-SVN: r1757

From-SVN: r1756

(SET_NOTE_BLOCK_NUMBER): Deleted.

From-SVN: r1755

From-SVN: r1754

pointers to integers.

From-SVN: r1753

integers.

From-SVN: r1752

to integers.

From-SVN: r1751

to integers.

From-SVN: r1750

From-SVN: r1749

(find_use_as_address): Use HOST_WIDE_INT instead of int when comparing a pointer to an integer constant...

(find_use_as_address): Use HOST_WIDE_INT instead of int when comparing a
pointer to an integer constant; also when returning int.

From-SVN: r1748

pointer to an integer constant.

From-SVN: r1747

(combine_instructions): Initialize it.
(set_significant): Set it.
(try_combine): Set subst_low_cuid immediately before calling `subst' to
the INSN_CUID of the lowest insn involved in the call.   Change XOR with
out-of-range constant to (not (xor ...)).
Call both split_insns and find_split_point; pass extra parm to
find_split_point.
Record I2DEST's value if I2 now sets it; similarly for I1DEST.
(find_split_point): Add new arg INSN.
If AND'ing with a large single-bit constant and we only care about
equality with zero, replace with bit extraction.
Make two shifts for ZERO_EXTRACTs unless very narrow.
(subst): Move RESTART label earlier.
If we have a simple operation applied to IF_THEN_ELSE, move the operation
inside the two arms.
(subst, case SUBREG): Use force_to_mode.
(subst, case NOT): Change (not (xor X C)) to (xor X ~C).
(subst, case NEG): Remove (neg (abs X)); redundant.
Convert (neg (xor A 1)) to (plus A -1) if A is known to be 0 or 1.
(subst, case IF_THEN_ELSE): Simplify if an arm contains a register being
tested by substiting the known value.
Put constant integer in last arm if can reverse comparison.
(subst, case SET): Use gen_lowpart_for_combine.
(subst, case AND): Make IF_THEN_ELSE when appropriate.
(subst, case IOR): (ior A C) can sometimes be just C.
(subst, case XOR): Go back and restart when canonicalizing.
(subst, case ABS): Use num_sign_bit_copies.
(make_extraction): Call force_to_mode.
(make_compound_operation): Look at optabs rather that explicitly checking
for operations and assuming we have SImode.
Handle (ashiftrt (OP (ashift foo C1) C3) C2).
(force_to_mode): Only change mode of arithmetic if optab says we have
operation in that mode.
Remove unneeded ASHIFTRT; add handling for IF_THEN_ELSE.
(significant_bits, case NEG): Call num_sign_bit_copies.
(significant_bits, case ABS, case [US]{MIN,MAX}, IF_THEN_ELSE): New.
(num_sign_bit_copies): New function.
(simplify_shift_const): Remove ASHIFTRT if value is known -1 or 0.
Use num_sign_bit_copies to simplify (ashiftrt (ashift ...) ...)
and (ashiftrt (neg ...) ...).
Remove now redundant case when VAROP is a PLUS.
(simplify_comparison): If A is known to be -1 or 0, A != -1 is A == 0.
Simplify unsigned tests that really check the sign bit.
(simplify_comparison, case ASHIFTRT): Convert to LSHIFTRT if equality
comparison with zero.
(get_last_value): Check if the desired register is set in the
insn before the one whose INSN_CUID is subst_low_cuid.

From-SVN: r1746

TREE_CODE.

From-SVN: r1745

From-SVN: r1744

(optimize_bit_field_compare): Correct bogus use of types in
expressions; always do computation in a type wide enough for the
result.

From-SVN: r1743

(ASM_OUTPUT_DWARF_STRING): redefinition was
incorrect, and uneeded; while Solaris as doesn't support .string, it
does support .asciz, and sparcv4.h takes care of including that definition.

From-SVN: r1742

From-SVN: r1741

From-SVN: r1740

maximum_field_alignment when using the field's alignment.

From-SVN: r1739

From-SVN: r1738