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106 Commits

Author SHA1 Message Date
Richard Kenner
2197a88a8c (HASHBITS): Removed. 
(HASH, struct set, canon_hash, safe_hash, remove_from_table):
Generate and use unsigned hash values, to avoid potential trouble
with signed shift/overflow.
Also name variables consistently: "hash", not "hash_code".
(lookup, lookup_for_remove, insert, merge_equiv_classes): Likewise.
(invalidate, rehash_using_reg, invalidate_for_call): Likewise.
(find_best_addr, record_jump_cond, cse_insn):  Likewise.

From-SVN: r6431
 1994-01-25 08:29:50 -05:00
Richard Kenner
28bad1cbc3 (simplify_relational_operation): Don't do anything with CC0 in 
addition to MODE_CC values.

From-SVN: r6376
 1994-01-10 19:31:01 -05:00
Richard Kenner
64812ded25 (simplify_relational_operation): Correct declaration of variables 
holding parts of constants.

From-SVN: r6351
 1994-01-02 08:14:22 -05:00
Richard Kenner
a432f20d05 (simplify_relational_operation): Rewrite and simplify. 
Add case when we can simplify A-B for compare of A and B.

From-SVN: r6344
 1993-12-31 06:47:13 -05:00
Richard Kenner
c407b802da (simplify_binary_operation, case MULT): Don't convert to ASHIFT if 
still generating RTL.

From-SVN: r6340
 1993-12-29 06:51:45 -05:00
Richard Kenner
a83afb65d0 (simplify_binary_operation, fold_rtx): Allow some FP simplications with -ffast-math. 
(simplify_binary_operation, fold_rtx): Allow some FP simplications
with -ffast-math.
(simplify_relational_operation): FP comparisons can be reversed
if -ffast-math is specified.

From-SVN: r6334
 1993-12-27 08:48:17 -05:00
Richard Kenner
79644f0689 (count_reg_usage): Don't count a register used within a SET that sets it. 
(delete_dead_from_cse): Pass new parm to count_reg_usage.

From-SVN: r6327
 1993-12-26 08:30:32 -05:00
Richard Kenner
c2cc077888 (fold_rtx... 
(fold_rtx, case PLUS): If we have (plus A B), A is equivalent to a
negative constant, and the negated constant is in register, convert to
(minus A C) where C is the register containing the negated constant.

From-SVN: r6326
 1993-12-26 07:55:11 -05:00
Richard Kenner
089481a600 (simplify_unary_operations): Check that operations really are 
double-word before doing them.

From-SVN: r6310
 1993-12-25 06:05:04 -05:00
Richard Kenner
3308590619 (simplify_binary_operation): Fix typo in CONST_DOUBLE change. 
From-SVN: r6309
 1993-12-24 21:54:55 -05:00
Richard Kenner
30d69925b6 (simplify_binary_operation, case PLUS, MINUS): 
Simplify such things as (X >> 1) - X.

From-SVN: r6308
 1993-12-24 21:24:39 -05:00
Jeff Law
4433322379 cse.c (cse_insn): Set "cse_jumps_altered" when collapsing a switch statement into an... 
* cse.c (cse_insn): Set "cse_jumps_altered" when collapsing
        a switch statement into an unconditional jump.
        * toplev.c (rest_of_compilation): Rerun jump_optimize
        before the second CSE pass.

From-SVN: r6305
 1993-12-24 12:36:04 -07:00
Richard Kenner
fe87324067 (simplify_binary_operation): Can fold multi-word operations when first is CONST_INT. 
(simplify_binary_operation): Can fold multi-word operations when first is
CONST_INT.
(simplify_binary_operation, case PLUS, MINUS): Don't call plus_constant when
OP0 is VOIDmode.

From-SVN: r6298
 1993-12-24 06:53:52 -05:00
Torbjorn Granlund
4d61f8c559 (simplify_binary_operation, case *SHIFT*): Reduce arg1 as 
defined by SHIFT_COUNT_TRUNCATED.

From-SVN: r6296
 1993-12-24 11:46:16 +00:00
Richard Kenner
a4e262bcec (delete_reg_equiv): Don't reference elements of REG_{NEXT,PREV}_EQV 
that are not defined.

From-SVN: r6276
 1993-12-23 06:57:20 -05:00
Richard Stallman
2708da920e (cse_insn): Call `invalidate' also for STRICT_LOW_PART and ZERO_EXTRACT (three places). 
(cse_insn):  Call `invalidate' also for STRICT_LOW_PART and
ZERO_EXTRACT (three places).
(invalidate_from_clobbers): Likewise (two places).
(cse_around_loop): Likewise.
(invalidate_skipped_set): Likewise.
(cse_set_around_loop): Likewise.

From-SVN: r5993
 1993-11-04 08:30:30 +00:00
Richard Stallman
0af62b41cd (cse_insn): When using src_related, copy the rtx. 
Likewise for src_eqv_here.

From-SVN: r5922
 1993-10-27 23:22:38 +00:00
Richard Stallman
76fb0b6041 (fold_rtx): Alter previous change: don't fold the shift 
if the count exceeds the width of the value inside the subreg.

(note_mem_written): (mem (scratch)) means clobber everything.

(fold_rtx): Special case handling for folding
a subreg of the result of a left shift.

From-SVN: r5854
 1993-10-21 02:43:58 +00:00
Richard Stallman
eb5ad42ab3 (record_jump_cond): At end, make missing equivalences 
first, and then merge them.

From-SVN: r5769
 1993-10-13 04:03:24 +00:00
Richard Kenner
85c0a55631 (simplify_binary_operation): Test value of SHIFT_COUNT_TRUNCATED if it 
is defined.

From-SVN: r5731
 1993-10-11 07:39:02 -04:00
Richard Kenner
2bb81c86de (record_jump_cond): Rehash OP1 if OP0's insert_regs returns nonzero. 
From-SVN: r5631
 1993-10-06 06:56:50 -04:00
Torbjorn Granlund
cdf4112f22 (insert_regs): Always return something. 
(simplify_unary_operation): Remove unused variable.
(cse_process_notes): Likewise.
(invalidate_skipped_block): Likewise.
(cse_set_around_loop): Likewise.

From-SVN: r5555
 1993-10-02 00:27:43 +00:00
Doug Evans
8bc169f258 cse.c: (FIXED_REGNO_P): HARD_FRAME_POINTER_REGNUM is fixed. 
* cse.c: (FIXED_REGNO_P): HARD_FRAME_POINTER_REGNUM is fixed.
(CHEAP_REG): HARD_FRAME_POINTER_REGNUM is cheap.
(FIXED_BASE_PLUS): Allow hard frame pointer as base.
(NONZERO_BASE_PLUS_P): Likewise.
(cannon_hash, case REG): Add HARD_FRAME_POINTER_REGNUM to list of
special registers for SMALL_REGISTER_CLASSES.
(find_best_addr): Addresses containing HARD_FRAME_POINTER_REGNUM
cannot be replaced.
(cse_main): value in HARD_FRAME_POINTER_REGNUM is preserved across calls.

From-SVN: r5451
 1993-09-24 19:38:20 +00:00
Richard Kenner
f3becefd60 (fold_rtx, case MINUS): Copy result obtained from hash table. 
From-SVN: r5347
 1993-09-17 18:13:33 -04:00
Richard Kenner
31c85c78b1 (fold_rtx, case SUBREG): If paradoxical SUBREG of a constant, return 
the constant.

From-SVN: r5346
 1993-09-17 18:10:33 -04:00
Jim Wilson
f7911249bb (cse_insn): After inserting src_eqv... 
(cse_insn): After inserting src_eqv, check to see if it is
identical to any uninserted SET_SRCs, and if so, set their src_elt
to src_eqv_elt.

From-SVN: r5129
 1993-08-10 12:11:27 -07:00
Richard Stallman
9c3b4c8be3 Include stdio.h before rtl.h. 
From-SVN: r4884
 1993-07-09 05:09:25 +00:00
Richard Stallman
9d1bedcf3a (simplify_binary_operation, case MINUS): Fix backwards 
test added in last change.

From-SVN: r4859
 1993-07-06 20:31:01 +00:00
Richard Kenner
cbf6a543dc (simplify_*_operation, fold_rtx, record_jump_cond, cse_insn): Use 
INTEGRAL_MODE_P and FLOAT_MODE_P.

From-SVN: r4780
 1993-06-27 21:20:38 -04:00
Richard Kenner
5f6be9da2e Fix typo in copyright line. 
From-SVN: r4686
 1993-06-17 15:16:45 -04:00
Richard Stallman
ffcf63937c (invalidate_skipped_set): Promote "nonscalar" to "all". 
From-SVN: r4679
 1993-06-14 23:16:31 +00:00
Richard Stallman
5d5ea90929 (record_jump_cond): Look up op1 again after inserting op0. 
From-SVN: r4669
 1993-06-12 23:42:59 +00:00
Richard Stallman
4908e50870 (fold_rtx): Correct check for associating shifts and ending up with a shift count too large... 
(fold_rtx): Correct check for associating shifts and
ending up with a shift count too large; convert to the
largest valid for ASHIFTRT and don't fold all others.

From-SVN: r4585
 1993-05-28 22:40:33 +00:00
Richard Kenner
8e7e536500 (simplify_binary_operation, simplify_relational_operation): Check for 
MODE_CC modes, not just CCmode.

From-SVN: r4352
 1993-05-06 05:44:05 -04:00
Richard Stallman
2e794ee866 (record_jump_cond): Use mode of op0 or op1, not MODE, 
when testing for narrowing or widening subregs.

From-SVN: r4301
 1993-05-02 12:43:15 +00:00
Richard Stallman
709ab4fc49 (simplify_binary_operation): Reject CCmode in A & (~A) -> 0. 
Also fix typos in previous change.

From-SVN: r4295
 1993-05-01 16:55:51 +00:00
Richard Stallman
31dcf83f63 (cse_insn): Reset the INSN_CODE for conditional 
or computed jumps which have been converted into simplejumps.

From-SVN: r4287
 1993-04-30 16:04:40 +00:00
Richard Kenner
dbbe64450e (simplify_binary_operation, case SMAX): Cast to unsiged HOST_WIDE_INT 
instead of unsigned int.

From-SVN: r4259
 1993-04-28 14:56:43 -04:00
Richard Kenner
54b1de5550 (invalidate): Use proper type for in_table. 
From-SVN: r4208
 1993-04-24 11:39:59 -04:00
Richard Kenner
5a3d4befaf (simplify_binary_operation... 
(simplify_binary_operation, case MULT): When testing for
floating-point equality, make sure we do so inside a region protected
from traps.

From-SVN: r3963
 1993-03-31 15:57:24 -05:00
Richard Kenner
1ff0c00d9f (insert_regs): If a REG already is in a class but not in the mode we 
want, don't do anything to the classes.

From-SVN: r3951
 1993-03-31 07:00:31 -05:00
Richard Stallman
d3159aee6e (simplify_binary_operation): real_value_truncate returns REAL_VALUE_TYPE. 
(simplify_binary_operation): real_value_truncate
returns REAL_VALUE_TYPE.
Convert rtx_code into tree_code for argument to REAL_ARITHMETIC.

(simplify_unary_operation): Use new ..._RNDZINT macros
instead of casting value of REAL_VALUE_FIX_TRUNCATE
and REAL_VALUE_UNSIGNED_FIX_TRUNCATE.

From-SVN: r3943
 1993-03-31 05:53:29 +00:00
Richard Kenner
6d44728adf (CHEAP_REG): Add missing parens. 
From-SVN: r3861
 1993-03-23 20:16:17 -05:00
Jim Wilson
7fe34fdfe7 (cse_process_notes): Replace NULL_RTX with just zero. 
From-SVN: r3795
 1993-03-19 18:17:48 -08:00
Richard Kenner
fb5c8ce64a (simplify_plus_minus): Count CONSTs coming in and going out... 
(simplify_plus_minus): Count CONSTs coming in and going out; we have
simplified things if we have more CONSTs going out even if we have the
same number of total terms.

From-SVN: r3787
 1993-03-19 06:29:40 -05:00
Richard Kenner
e7bb59fa6c (FIXED_REGNO_P): Remove previous change; all callers but one already check. 
(CHEAP_REG): Only call FIXED_REGNO_P for hard regs.
(fold_rtx): Clarify comments.

From-SVN: r3762
 1993-03-16 17:41:57 -05:00
James Van Artsdalen
9798977501 (FIXED_REGNO_P): Pseudos can't be fixed regs. 
From-SVN: r3757
 1993-03-16 09:54:12 +00:00
Richard Kenner
b7d9299b30 (simplify_plus_minus): Remove last change. 
(simplify_plus_minus): Remove last change.  Instead, count initial
operands and test against that count to see if we did anything.

From-SVN: r3748
 1993-03-15 17:38:40 -05:00
Richard Kenner
7463703395 (simplify_plus_minus): Reject "simplifications" that are too complex 
in form.

From-SVN: r3733
 1993-03-14 09:37:43 -05:00
Richard Kenner
5931019b79 (simplify_plus_minus): Correct sign error in expanding NOT. 
From-SVN: r3732
 1993-03-14 06:32:20 -05:00