lower_dw.c 69.8 KB
Newer Older
Christian Würdig's avatar
Christian Würdig committed
1
/*
2
 * Copyright (C) 1995-2011 University of Karlsruhe.  All right reserved.
Christian Würdig's avatar
Christian Würdig committed
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 *
 * This file is part of libFirm.
 *
 * This file may be distributed and/or modified under the terms of the
 * GNU General Public License version 2 as published by the Free Software
 * Foundation and appearing in the file LICENSE.GPL included in the
 * packaging of this file.
 *
 * Licensees holding valid libFirm Professional Edition licenses may use
 * this file in accordance with the libFirm Commercial License.
 * Agreement provided with the Software.
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE.
 */

Michael Beck's avatar
Michael Beck committed
20
21
/**
 * @file
yb9976's avatar
yb9976 committed
22
 * @brief   Lower double word operations, i.e. 64bit -> 32bit, 32bit -> 16bit etc.
Michael Beck's avatar
Michael Beck committed
23
24
25
 * @date    8.10.2004
 * @author  Michael Beck
 * @version $Id$
26
 */
Matthias Braun's avatar
Matthias Braun committed
27
#include "config.h"
28

29
#include <string.h>
30
#include <stdlib.h>
31
#include <stdbool.h>
32
33
#include <assert.h>

34
#include "error.h"
35
#include "lowering.h"
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
#include "irnode_t.h"
#include "irgraph_t.h"
#include "irmode_t.h"
#include "iropt_t.h"
#include "irgmod.h"
#include "tv_t.h"
#include "dbginfo_t.h"
#include "iropt_dbg.h"
#include "irflag_t.h"
#include "firmstat.h"
#include "irgwalk.h"
#include "ircons.h"
#include "irflag.h"
#include "irtools.h"
#include "debug.h"
#include "set.h"
#include "pmap.h"
#include "pdeq.h"
Christian Würdig's avatar
Christian Würdig committed
54
#include "irdump.h"
55
#include "array_t.h"
Michael Beck's avatar
Michael Beck committed
56
#include "irpass_t.h"
57

58
59
60
61
62
63
64
65
66
67
typedef struct lower_env_t lower_env_t;

/**
 * The type of a lower function.
 *
 * @param node   the node to be lowered
 * @param env    the lower environment
 */
typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);

Michael Beck's avatar
Michael Beck committed
68
/** A map from (op, imode, omode) to Intrinsic functions entities. */
69
70
static set *intrinsic_fkt;

Michael Beck's avatar
Michael Beck committed
71
72
73
/** A map from (imode, omode) to conv function types. */
static set *conv_types;

74
75
76
77
/** A map from a method type to its lowered type. */
static pmap *lowered_type;

/** The types for the binop and unop intrinsics. */
Christian Würdig's avatar
Christian Würdig committed
78
static ir_type *binop_tp_u, *binop_tp_s, *unop_tp_u, *unop_tp_s, *shiftop_tp_u, *shiftop_tp_s, *tp_s, *tp_u;
79
80
81
82
83

/** the debug handle */
DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)

/**
Michael Beck's avatar
Michael Beck committed
84
 * An entry in the (op, imode, omode) -> entity map.
85
 */
86
typedef struct op_mode_entry {
87
	const ir_op   *op;    /**< the op */
Michael Beck's avatar
Michael Beck committed
88
89
	const ir_mode *imode; /**< the input mode */
	const ir_mode *omode; /**< the output mode */
90
	ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
91
92
} op_mode_entry_t;

Michael Beck's avatar
Michael Beck committed
93
94
95
/**
 * An entry in the (imode, omode) -> tp map.
 */
96
typedef struct conv_tp_entry {
Michael Beck's avatar
Michael Beck committed
97
98
99
100
101
	const ir_mode *imode; /**< the input mode */
	const ir_mode *omode; /**< the output mode */
	ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
} conv_tp_entry_t;

102
103
104
105
/**
 * Every double word node will be replaced,
 * we need some store to hold the replacement:
 */
106
typedef struct node_entry_t {
107
108
	ir_node *low_word;    /**< the low word */
	ir_node *high_word;   /**< the high word */
109
110
111
} node_entry_t;

enum lower_flags {
112
113
	MUST_BE_LOWERED = 1,  /**< graph must be lowered */
	CF_CHANGED      = 2,  /**< control flow was changed */
114
115
116
117
118
};

/**
 * The lower environment.
 */
119
struct lower_env_t {
120
	node_entry_t **entries;       /**< entries per node */
121
	ir_graph      *irg;
122
	struct obstack obst;          /**< an obstack holding the temporary data */
Matthias Braun's avatar
Matthias Braun committed
123
124
125
126
127
128
129
130
131
132
133
134
	ir_type   *l_mtp;              /**< lowered method type of the current method */
	ir_tarval *tv_mode_bytes;     /**< a tarval containing the number of bytes in the lowered modes */
	ir_tarval *tv_mode_bits;      /**< a tarval containing the number of bits in the lowered modes */
	pdeq      *waitq;              /**< a wait queue of all nodes that must be handled later */
	ir_node  **lowered_phis;       /**< list of lowered phis */
	pmap      *proj_2_block;       /**< a map from ProjX to its destination blocks */
	ir_mode   *high_signed;        /**< doubleword signed type */
	ir_mode   *high_unsigned;      /**< doubleword unsigned type */
	ir_mode   *low_signed;         /**< word signed type */
	ir_mode   *low_unsigned;       /**< word unsigned type */
	ident     *first_id;           /**< .l for little and .h for big endian */
	ident     *next_id;            /**< .h for little and .l for big endian */
135
136
	const lwrdw_param_t *params;  /**< transformation parameter */
	unsigned flags;               /**< some flags */
137
	unsigned n_entries;           /**< number of entries */
138
	ir_type  *value_param_tp;     /**< the old value param type */
139
};
140

141
142
static void lower_node(lower_env_t *env, ir_node *node);

Michael Beck's avatar
Michael Beck committed
143
144
145
/**
 * Create a method type for a Conv emulation from imode to omode.
 */
146
147
static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env)
{
Michael Beck's avatar
Michael Beck committed
148
149
150
151
152
153
154
	conv_tp_entry_t key, *entry;
	ir_type *mtd;

	key.imode = imode;
	key.omode = omode;
	key.mtd   = NULL;

155
	entry = (conv_tp_entry_t*)set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
Michael Beck's avatar
Michael Beck committed
156
157
158
	if (! entry->mtd) {
		int n_param = 1, n_res = 1;

159
		if (imode == env->high_signed || imode == env->high_unsigned)
Michael Beck's avatar
Michael Beck committed
160
			n_param = 2;
161
		if (omode == env->high_signed || omode == env->high_unsigned)
Michael Beck's avatar
Michael Beck committed
162
163
164
			n_res = 2;

		/* create a new one */
165
		mtd = new_type_method(n_param, n_res);
Michael Beck's avatar
Michael Beck committed
166
167
168

		/* set param types and result types */
		n_param = 0;
169
		if (imode == env->high_signed) {
170
			set_method_param_type(mtd, n_param++, tp_u);
Michael Beck's avatar
Michael Beck committed
171
			set_method_param_type(mtd, n_param++, tp_s);
172
		} else if (imode == env->high_unsigned) {
Michael Beck's avatar
Michael Beck committed
173
174
			set_method_param_type(mtd, n_param++, tp_u);
			set_method_param_type(mtd, n_param++, tp_u);
Michael Beck's avatar
BugFix:    
Michael Beck committed
175
		} else {
176
			ir_type *tp = get_type_for_mode(imode);
Michael Beck's avatar
Michael Beck committed
177
			set_method_param_type(mtd, n_param++, tp);
178
		}
Michael Beck's avatar
Michael Beck committed
179
180

		n_res = 0;
181
		if (omode == env->high_signed) {
182
			set_method_res_type(mtd, n_res++, tp_u);
Michael Beck's avatar
Michael Beck committed
183
			set_method_res_type(mtd, n_res++, tp_s);
184
		} else if (omode == env->high_unsigned) {
Michael Beck's avatar
Michael Beck committed
185
186
			set_method_res_type(mtd, n_res++, tp_u);
			set_method_res_type(mtd, n_res++, tp_u);
Michael Beck's avatar
BugFix:    
Michael Beck committed
187
		} else {
188
			ir_type *tp = get_type_for_mode(omode);
Michael Beck's avatar
Michael Beck committed
189
			set_method_res_type(mtd, n_res++, tp);
190
		}
Michael Beck's avatar
Michael Beck committed
191
		entry->mtd = mtd;
Michael Beck's avatar
BugFix:    
Michael Beck committed
192
	} else {
Michael Beck's avatar
Michael Beck committed
193
		mtd = entry->mtd;
194
	}
Michael Beck's avatar
Michael Beck committed
195
	return mtd;
196
}
Michael Beck's avatar
Michael Beck committed
197

198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
/**
 * Add an additional control flow input to a block.
 * Patch all Phi nodes. The new Phi inputs are copied from
 * old input number nr.
 */
static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
{
	int i, arity = get_irn_arity(block);
	ir_node **in, *phi;

	assert(nr < arity);

	NEW_ARR_A(ir_node *, in, arity + 1);
	for (i = 0; i < arity; ++i)
		in[i] = get_irn_n(block, i);
	in[i] = cf;

	set_irn_in(block, i + 1, in);

217
	for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
218
219
220
221
		for (i = 0; i < arity; ++i)
			in[i] = get_irn_n(phi, i);
		in[i] = in[nr];
		set_irn_in(phi, i + 1, in);
222
223
	}
}
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238

/**
 * Add an additional control flow input to a block.
 * Patch all Phi nodes. The new Phi inputs are copied from
 * old input from cf tmpl.
 */
static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
{
	int i, arity = get_irn_arity(block);
	int nr = 0;

	for (i = 0; i < arity; ++i) {
		if (get_irn_n(block, i) == tmpl) {
			nr = i;
			break;
239
240
		}
	}
241
242
	assert(i < arity);
	add_block_cf_input_nr(block, nr, cf);
243
}
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262

/**
 * Return the "operational" mode of a Firm node.
 */
static ir_mode *get_irn_op_mode(ir_node *node)
{
	switch (get_irn_opcode(node)) {
	case iro_Load:
		return get_Load_mode(node);
	case iro_Store:
		return get_irn_mode(get_Store_value(node));
	case iro_Div:
		return get_irn_mode(get_Div_left(node));
	case iro_Mod:
		return get_irn_mode(get_Mod_left(node));
	case iro_Cmp:
		return get_irn_mode(get_Cmp_left(node));
	default:
		return get_irn_mode(node);
263
264
	}
}
265
266

/**
267
268
 * Walker, prepare the node links and determine which nodes need to be lowered
 * at all.
269
 */
270
static void prepare_links(lower_env_t *env, ir_node *node)
271
272
273
{
	ir_mode      *mode = get_irn_op_mode(node);
	node_entry_t *link;
274
	int           i;
275

276
	if (mode == env->high_signed || mode == env->high_unsigned) {
277
		unsigned idx = get_irn_idx(node);
278
		/* ok, found a node that will be lowered */
279
		link = OALLOCZ(&env->obst, node_entry_t);
280

281
		if (idx >= env->n_entries) {
Michael Beck's avatar
Michael Beck committed
282
			/* enlarge: this happens only for Rotl nodes which is RARELY */
283
			unsigned old   = env->n_entries;
284
			unsigned n_idx = idx + (idx >> 3);
Michael Beck's avatar
Michael Beck committed
285

286
287
288
			ARR_RESIZE(node_entry_t *, env->entries, n_idx);
			memset(&env->entries[old], 0, (n_idx - old) * sizeof(env->entries[0]));
			env->n_entries = n_idx;
Michael Beck's avatar
Michael Beck committed
289
		}
290
291
		env->entries[idx] = link;
		env->flags |= MUST_BE_LOWERED;
292
	} else if (is_Conv(node)) {
293
294
295
296
		/* Conv nodes have two modes */
		ir_node *pred = get_Conv_op(node);
		mode = get_irn_mode(pred);

297
		if (mode == env->high_signed || mode == env->high_unsigned) {
Michael Beck's avatar
BugFix:    
Michael Beck committed
298
			/* must lower this node either but don't need a link */
299
			env->flags |= MUST_BE_LOWERED;
300
		}
301
		return;
302
	}
303
304
305
306
307
308
309
310

	if (is_Proj(node)) {
		/* link all Proj nodes to its predecessor:
		   Note that Tuple Proj's and its Projs are linked either. */
		ir_node *pred = get_Proj_pred(node);

		set_irn_link(node, get_irn_link(pred));
		set_irn_link(pred, node);
Michael Beck's avatar
BugFix:    
Michael Beck committed
311
	} else if (is_Phi(node)) {
312
313
		/* link all Phi nodes to its block */
		ir_node *block = get_nodes_block(node);
314
		add_Block_phi(block, node);
Michael Beck's avatar
BugFix:    
Michael Beck committed
315
	} else if (is_Block(node)) {
316
317
318
319
320
		/* fill the Proj -> Block map */
		for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
			ir_node *pred = get_Block_cfgpred(node, i);

			if (is_Proj(pred))
321
				pmap_insert(env->proj_2_block, pred, node);
322
323
324
		}
	}
}
325

326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
static node_entry_t *get_node_entry(lower_env_t *env, ir_node *node)
{
	unsigned idx = get_irn_idx(node);
	assert(idx < env->n_entries);
	return env->entries[idx];
}

static void set_lowered(lower_env_t *env, ir_node *old,
                        ir_node *new_low, ir_node *new_high)
{
	node_entry_t *entry = get_node_entry(env, old);
	entry->low_word  = new_low;
	entry->high_word = new_high;
}

341
342
343
/**
 * Translate a Constant: create two.
 */
344
345
static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env)
{
Matthias Braun's avatar
Matthias Braun committed
346
347
348
349
350
351
352
353
354
	ir_graph  *irg      = get_irn_irg(node);
	dbg_info  *dbg      = get_irn_dbg_info(node);
	ir_mode   *low_mode = env->low_unsigned;
	ir_tarval *tv       = get_Const_tarval(node);
	ir_tarval *tv_l     = tarval_convert_to(tv, low_mode);
	ir_node   *res_low  = new_rd_Const(dbg, irg, tv_l);
	ir_tarval *tv_shrs  = tarval_shrs(tv, env->tv_mode_bits);
	ir_tarval *tv_h     = tarval_convert_to(tv_shrs, mode);
	ir_node   *res_high = new_rd_Const(dbg, irg, tv_h);
355
356

	set_lowered(env, node, res_low, res_high);
357
}
358
359
360
361

/**
 * Translate a Load: create two.
 */
362
363
static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env)
{
364
	ir_mode    *low_mode = env->low_unsigned;
365
	ir_graph   *irg = get_irn_irg(node);
366
367
368
369
370
	ir_node    *adr = get_Load_ptr(node);
	ir_node    *mem = get_Load_mem(node);
	ir_node    *low, *high, *proj;
	dbg_info   *dbg;
	ir_node    *block = get_nodes_block(node);
371
	ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
372
	                         ? cons_volatile : cons_none;
373
374
375

	if (env->params->little_endian) {
		low  = adr;
376
		high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
Michael Beck's avatar
BugFix:    
Michael Beck committed
377
	} else {
378
		low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
379
		high = adr;
380
	}
381
382
383

	/* create two loads */
	dbg  = get_irn_dbg_info(node);
384
	low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
385
	proj = new_r_Proj(low, mode_M, pn_Load_M);
386
	high = new_rd_Load(dbg, block, proj, high, mode, volatility);
387

388
	set_lowered(env, node, low, high);
389

390
391
	for (proj = (ir_node*)get_irn_link(node); proj;
	     proj = (ir_node*)get_irn_link(proj)) {
392
393
394
395
396
397
398
399
400
		switch (get_Proj_proj(proj)) {
		case pn_Load_M:         /* Memory result. */
			/* put it to the second one */
			set_Proj_pred(proj, high);
			break;
		case pn_Load_X_except:  /* Execution result if exception occurred. */
			/* put it to the first one */
			set_Proj_pred(proj, low);
			break;
401
402
403
404
		case pn_Load_res: {       /* Result of load operation. */
			ir_node *res_low  = new_r_Proj(low,  low_mode, pn_Load_res);
			ir_node *res_high = new_r_Proj(high, mode,     pn_Load_res);
			set_lowered(env, proj, res_low, res_high);
405
			break;
406
		}
407
408
		default:
			assert(0 && "unexpected Proj number");
409
		}
410
411
		/* mark this proj: we have handled it already, otherwise we might fall
		 * into out new nodes. */
412
		mark_irn_visited(proj);
413
414
	}
}
415
416
417
418

/**
 * Translate a Store: create two.
 */
419
420
static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env)
{
421
422
	ir_graph     *irg;
	ir_node      *block, *adr, *mem;
423
	ir_node      *low, *high, *proj;
424
	dbg_info     *dbg;
425
426
427
	ir_node            *value = get_Store_value(node);
	const node_entry_t *entry = get_node_entry(env, value);
	ir_cons_flags volatility = get_Store_volatility(node) == volatility_is_volatile
428
	                           ? cons_volatile : cons_none;
Matthias Braun's avatar
Matthias Braun committed
429
	(void) mode;
430
431
432
433
434
435
436

	assert(entry);

	if (! entry->low_word) {
		/* not ready yet, wait */
		pdeq_putr(env->waitq, node);
		return;
437
	}
438

439
	irg = get_irn_irg(node);
440
441
442
443
444
445
	adr = get_Store_ptr(node);
	mem = get_Store_mem(node);
	block = get_nodes_block(node);

	if (env->params->little_endian) {
		low  = adr;
446
		high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
Michael Beck's avatar
BugFix:    
Michael Beck committed
447
	} else {
448
		low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
449
		high = adr;
450
	}
451
452
453

	/* create two Stores */
	dbg = get_irn_dbg_info(node);
454
	low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
455
	proj = new_r_Proj(low, mode_M, pn_Store_M);
456
	high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
457

458
	set_lowered(env, node, low, high);
459

460
461
	for (proj = (ir_node*)get_irn_link(node); proj;
	     proj = (ir_node*)get_irn_link(proj)) {
462
463
464
465
466
467
468
469
470
471
472
		switch (get_Proj_proj(proj)) {
		case pn_Store_M:         /* Memory result. */
			/* put it to the second one */
			set_Proj_pred(proj, high);
			break;
		case pn_Store_X_except:  /* Execution result if exception occurred. */
			/* put it to the first one */
			set_Proj_pred(proj, low);
			break;
		default:
			assert(0 && "unexpected Proj number");
473
		}
474
475
476
		/* mark this proj: we have handled it already, otherwise we might fall into
		 * out new nodes. */
		mark_irn_visited(proj);
477
478
	}
}
479
480
481

/**
 * Return a node containing the address of the intrinsic emulation function.
Michael Beck's avatar
Michael Beck committed
482
483
484
485
486
487
 *
 * @param method  the method type of the emulation function
 * @param op      the emulated ir_op
 * @param imode   the input mode of the emulated opcode
 * @param omode   the output mode of the emulated opcode
 * @param env     the lower environment
488
 */
Michael Beck's avatar
Michael Beck committed
489
490
static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
                                      ir_mode *imode, ir_mode *omode,
491
492
                                      lower_env_t *env)
{
493
	symconst_symbol sym;
494
	ir_entity *ent;
495
496
	op_mode_entry_t key, *entry;

Michael Beck's avatar
Michael Beck committed
497
498
499
500
	key.op    = op;
	key.imode = imode;
	key.omode = omode;
	key.ent   = NULL;
501

502
	entry = (op_mode_entry_t*)set_insert(intrinsic_fkt, &key, sizeof(key),
Michael Beck's avatar
Michael Beck committed
503
				HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
504
505
	if (! entry->ent) {
		/* create a new one */
Michael Beck's avatar
Michael Beck committed
506
		ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
507
508
509

		assert(ent && "Intrinsic creator must return an entity");
		entry->ent = ent;
Michael Beck's avatar
BugFix:    
Michael Beck committed
510
	} else {
511
		ent = entry->ent;
512
	}
513
	sym.entity_p = ent;
514
	return new_r_SymConst(env->irg, mode_P_code, sym, symconst_addr_ent);
515
}
516
517
518
519
520
521

/**
 * Translate a Div.
 *
 * Create an intrinsic Call.
 */
522
523
static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env)
{
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
	ir_node            *left        = get_Div_left(node);
	ir_node            *right       = get_Div_right(node);
	const node_entry_t *left_entry  = get_node_entry(env, left);
	const node_entry_t *right_entry = get_node_entry(env, right);
	ir_node            *block       = get_nodes_block(node);
	dbg_info           *dbgi        = get_irn_dbg_info(node);
	ir_type            *mtp
		= mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
	ir_mode            *opmode = get_irn_op_mode(node);
	ir_node            *addr
		= get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
	ir_node  *in[4] = {
		left_entry->low_word, left_entry->high_word,
		right_entry->low_word, right_entry->high_word };
	ir_node            *call
		= new_rd_Call(dbgi, block, get_Div_mem(node), addr, 4, in, mtp);
	ir_node            *resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
	ir_node            *proj;
542
543
544

	set_irn_pinned(call, get_irn_pinned(node));

545
546
	for (proj = (ir_node*)get_irn_link(node); proj;
	     proj = (ir_node*)get_irn_link(proj)) {
547
548
549
550
		switch (get_Proj_proj(proj)) {
		case pn_Div_M:         /* Memory result. */
			/* reroute to the call */
			set_Proj_pred(proj, call);
551
			set_Proj_proj(proj, pn_Call_M);
552
553
554
555
556
557
			break;
		case pn_Div_X_except:  /* Execution result if exception occurred. */
			/* reroute to the call */
			set_Proj_pred(proj, call);
			set_Proj_proj(proj, pn_Call_X_except);
			break;
558
559
560
561
562
		case pn_Div_res: {
			/* Result of computation. */
			ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
			ir_node *res_high = new_r_Proj(resproj, mode,              1);
			set_lowered(env, proj, res_low, res_high);
563
			break;
564
		}
565
566
		default:
			assert(0 && "unexpected Proj number");
567
		}
568
569
570
		/* mark this proj: we have handled it already, otherwise we might fall into
		 * out new nodes. */
		mark_irn_visited(proj);
571
572
	}
}
573
574
575
576
577
578

/**
 * Translate a Mod.
 *
 * Create an intrinsic Call.
 */
579
580
static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env)
{
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
	ir_node            *left        = get_Mod_left(node);
	ir_node            *right       = get_Mod_right(node);
	const node_entry_t *left_entry  = get_node_entry(env, left);
	const node_entry_t *right_entry = get_node_entry(env, right);
	ir_node            *in[4]       = {
		left_entry->low_word, left_entry->high_word,
		right_entry->low_word, right_entry->high_word
	};
	dbg_info           *dbgi        = get_irn_dbg_info(node);
	ir_node            *block       = get_nodes_block(node);
	ir_type            *mtp
		= mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
	ir_mode            *opmode = get_irn_op_mode(node);
	ir_node            *addr
		= get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
	ir_node            *call
		= new_rd_Call(dbgi, block, get_Mod_mem(node), addr, 4, in, mtp);
	ir_node            *resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
	ir_node            *proj;
600
601
	set_irn_pinned(call, get_irn_pinned(node));

602
603
	for (proj = (ir_node*)get_irn_link(node); proj;
	     proj = (ir_node*)get_irn_link(proj)) {
604
605
606
607
		switch (get_Proj_proj(proj)) {
		case pn_Mod_M:         /* Memory result. */
			/* reroute to the call */
			set_Proj_pred(proj, call);
608
			set_Proj_proj(proj, pn_Call_M);
609
610
611
612
613
614
			break;
		case pn_Mod_X_except:  /* Execution result if exception occurred. */
			/* reroute to the call */
			set_Proj_pred(proj, call);
			set_Proj_proj(proj, pn_Call_X_except);
			break;
615
616
617
618
619
		case pn_Mod_res: {
			/* Result of computation. */
			ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
			ir_node *res_high = new_r_Proj(resproj, mode,              1);
			set_lowered(env, proj, res_low, res_high);
620
			break;
621
		}
622
623
		default:
			assert(0 && "unexpected Proj number");
624
		}
625
626
		/* mark this proj: we have handled it already, otherwise we might fall
		 * into out new nodes. */
627
		mark_irn_visited(proj);
628
629
	}
}
630
631

/**
632
 * Translate a binop.
633
634
635
 *
 * Create an intrinsic Call.
 */
636
static void lower_binop(ir_node *node, ir_mode *mode, lower_env_t *env)
637
{
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
	ir_node            *left        = get_binop_left(node);
	ir_node            *right       = get_binop_right(node);
	const node_entry_t *left_entry  = get_node_entry(env, left);
	const node_entry_t *right_entry = get_node_entry(env, right);
	ir_node            *in[4]       = {
		left_entry->low_word, left_entry->high_word,
		right_entry->low_word, right_entry->high_word
	};
	dbg_info           *dbgi        = get_irn_dbg_info(node);
	ir_node            *block       = get_nodes_block(node);
	ir_graph           *irg         = get_irn_irg(block);
	ir_type            *mtp
		= mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
	ir_node            *addr
		= get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
	ir_node            *call
		= new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 4, in, mtp);
	ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
	ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
	ir_node            *res_high = new_r_Proj(resproj, mode,              1);
	set_irn_pinned(call, get_irn_pinned(node));
	set_lowered(env, node, res_low, res_high);
660
}
661

Christian Würdig's avatar
Christian Würdig committed
662
663
664
665
666
/**
 * Translate a Shiftop.
 *
 * Create an intrinsic Call.
 */
667
668
static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env)
{
669
	ir_node            *block      = get_nodes_block(node);
670
671
672
673
	ir_node            *left       = get_binop_left(node);
	const node_entry_t *left_entry = get_node_entry(env, left);
	ir_node            *right      = get_binop_right(node);
	ir_node            *in[3]      = {
674
675
676
		left_entry->low_word, left_entry->high_word,
		/* it should be safe to conv to low_unsigned */
		new_r_Conv(block, right, env->low_unsigned)
677
678
679
680
681
682
683
684
685
686
687
688
	};
	dbg_info           *dbgi       = get_irn_dbg_info(node);
	ir_graph           *irg        = get_irn_irg(block);
	ir_type            *mtp
		= mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
	ir_node            *addr
		= get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
	ir_node            *call
		= new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 3, in, mtp);
	ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
	ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
	ir_node            *res_high = new_r_Proj(resproj, mode,              1);
Christian Würdig's avatar
Christian Würdig committed
689

690
691
	set_irn_pinned(call, get_irn_pinned(node));
	set_lowered(env, node, res_low, res_high);
692
}
Christian Würdig's avatar
Christian Würdig committed
693

Michael Beck's avatar
Michael Beck committed
694
695
696
/**
 * Translate a Shr and handle special cases.
 */
697
698
static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env)
{
699
	ir_graph *irg   = get_irn_irg(node);
700
	ir_node  *right = get_Shr_right(node);
Michael Beck's avatar
Michael Beck committed
701
702

	if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
Matthias Braun's avatar
Matthias Braun committed
703
		ir_tarval *tv = get_Const_tarval(right);
Michael Beck's avatar
Michael Beck committed
704
705

		if (tarval_is_long(tv) &&
706
		    get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
707
708
			ir_node *block        = get_nodes_block(node);
			ir_node *left         = get_Shr_left(node);
709
			ir_mode *low_unsigned = env->low_unsigned;
710
			long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
711
712
713
			const node_entry_t *left_entry = get_node_entry(env, left);
			ir_node *res_low;
			ir_node *res_high;
Michael Beck's avatar
Michael Beck committed
714

715
			left = left_entry->high_word;
Matthias Braun's avatar
Matthias Braun committed
716

717
718
719
			/* convert high word into low_unsigned mode if necessary */
			if (get_irn_mode(left) != low_unsigned)
				left = new_r_Conv(block, left, low_unsigned);
Michael Beck's avatar
Michael Beck committed
720

721
			if (shf_cnt > 0) {
722
723
				ir_node *c = new_r_Const_long(irg, low_unsigned, shf_cnt);
				res_low = new_r_Shr(block, left, c, low_unsigned);
Michael Beck's avatar
BugFix:    
Michael Beck committed
724
			} else {
725
				res_low = left;
726
			}
727
728
			res_high = new_r_Const(irg, get_mode_null(mode));
			set_lowered(env, node, res_low, res_high);
Michael Beck's avatar
Michael Beck committed
729
730

			return;
731
732
		}
	}
Michael Beck's avatar
Michael Beck committed
733
	lower_Shiftop(node, mode, env);
734
}
Michael Beck's avatar
Michael Beck committed
735
736
737
738

/**
 * Translate a Shl and handle special cases.
 */
739
740
static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env)
{
741
	ir_graph *irg   = get_irn_irg(node);
742
	ir_node  *right = get_Shl_right(node);
Michael Beck's avatar
Michael Beck committed
743
744

	if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
Matthias Braun's avatar
Matthias Braun committed
745
		ir_tarval *tv = get_Const_tarval(right);
Michael Beck's avatar
Michael Beck committed
746

747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
		if (tarval_is_long(tv)) {
			long value = get_tarval_long(tv);
		    if (value >= (long)get_mode_size_bits(mode)) {
				/* simple case: shift above the lower word */
				ir_mode *mode_l;
				ir_node *block = get_nodes_block(node);
				ir_node *left = get_Shl_left(node);
				ir_node *c;
				long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
				const node_entry_t *left_entry = get_node_entry(env, left);
				ir_node  *res_low;
				ir_node  *res_high;

				left = left_entry->low_word;
				left = new_r_Conv(block, left, mode);

				mode_l = env->low_unsigned;
				if (shf_cnt > 0) {
					c        = new_r_Const_long(irg, mode_l, shf_cnt);
					res_high = new_r_Shl(block, left, c, mode);
				} else {
					res_high = left;
				}
				res_low = new_r_Const(irg, get_mode_null(mode_l));
				set_lowered(env, node, res_low, res_high);

				return;
			}
			if (value == 1) {
				/* left << 1 == left + left */
				ir_node            *left        = get_binop_left(node);
				const node_entry_t *left_entry  = get_node_entry(env, left);
				ir_node            *in[4]       = {
					left_entry->low_word, left_entry->high_word,
					left_entry->low_word, left_entry->high_word,
				};
				dbg_info           *dbgi        = get_irn_dbg_info(node);
				ir_node            *block       = get_nodes_block(node);
				ir_graph           *irg         = get_irn_irg(block);
				ir_type            *mtp
					= mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
				ir_node            *addr
					= get_intrinsic_address(mtp, op_Add, mode, mode, env);
				ir_node            *call
					= new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 4, in, mtp);
				ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
				ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
				ir_node            *res_high = new_r_Proj(resproj, mode,              1);
				set_irn_pinned(call, get_irn_pinned(node));
				set_lowered(env, node, res_low, res_high);

				return;
799
800
801
			}
		}
	}
Michael Beck's avatar
Michael Beck committed
802
	lower_Shiftop(node, mode, env);
803
}
Michael Beck's avatar
Michael Beck committed
804
805
806
807

/**
 * Translate a Shrs and handle special cases.
 */
808
809
static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env)
{
810
	ir_graph *irg   = get_irn_irg(node);
811
	ir_node  *right = get_Shrs_right(node);
Michael Beck's avatar
Michael Beck committed
812
813

	if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
Matthias Braun's avatar
Matthias Braun committed
814
		ir_tarval *tv = get_Const_tarval(right);
Michael Beck's avatar
Michael Beck committed
815
816

		if (tarval_is_long(tv) &&
817
		    get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
818
819
			ir_node *block         = get_nodes_block(node);
			ir_node *left          = get_Shrs_left(node);
820
			ir_mode *low_unsigned  = env->low_unsigned;
821
			long     shf_cnt       = get_tarval_long(tv) - get_mode_size_bits(mode);
822
			const node_entry_t *left_entry = get_node_entry(env, left);
823
			ir_node *left_unsigned = left;
824
825
			ir_node *res_low;
			ir_node *res_high;
Michael Beck's avatar
Michael Beck committed
826
827
			ir_node *c;

828
			left = left_entry->high_word;
Michael Beck's avatar
Michael Beck committed
829

830
831
832
833
			/* convert high word into low_unsigned mode if necessary */
			if (get_irn_mode(left_unsigned) != low_unsigned)
				left_unsigned = new_r_Conv(block, left, low_unsigned);

834
			if (shf_cnt > 0) {
835
836
				c       = new_r_Const_long(irg, low_unsigned, shf_cnt);
				res_low = new_r_Shrs(block, left_unsigned, c, low_unsigned);
Michael Beck's avatar
BugFix:    
Michael Beck committed
837
			} else {
838
				res_low = left_unsigned;
839
			}
Michael Beck's avatar
Michael Beck committed
840

841
842
843
			c        = new_r_Const(irg, get_mode_all_one(low_unsigned));
			res_high = new_r_Shrs(block, left, c, mode);
			set_lowered(env, node, res_low, res_high);
Michael Beck's avatar
Michael Beck committed
844
			return;
845
846
		}
	}
Michael Beck's avatar
Michael Beck committed
847
	lower_Shiftop(node, mode, env);
848
}
Michael Beck's avatar
Michael Beck committed
849
850

/**
Michael Beck's avatar
Michael Beck committed
851
 * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
Michael Beck's avatar
Michael Beck committed
852
 */
853
854
static void prepare_links_and_handle_rotl(ir_node *node, void *env)
{
855
	lower_env_t *lenv = (lower_env_t*)env;
Michael Beck's avatar
Michael Beck committed
856
857

	if (is_Rotl(node)) {
858
859
		ir_mode  *mode = get_irn_op_mode(node);
		ir_node  *right;
860
		ir_node  *left, *shl, *shr, *ornode, *block, *sub, *c;
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
		ir_mode  *omode, *rmode;
		ir_graph *irg;
		dbg_info *dbg;
		optimization_state_t state;

		if (mode != lenv->high_signed && mode != lenv->high_unsigned) {
			prepare_links(lenv, node);
			return;
		}

		/* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) */
		right = get_Rotl_right(node);
		irg   = get_irn_irg(node);
		dbg   = get_irn_dbg_info(node);
		omode = get_irn_mode(node);
		left  = get_Rotl_left(node);
		block = get_nodes_block(node);
		shl   = new_rd_Shl(dbg, block, left, right, omode);
		rmode = get_irn_mode(right);
		c     = new_r_Const_long(irg, rmode, get_mode_size_bits(omode));
		sub   = new_rd_Sub(dbg, block, c, right, rmode);
		shr   = new_rd_Shr(dbg, block, left, sub, omode);

		/* switch optimization off here, or we will get the Rotl back */
		save_optimization_state(&state);
		set_opt_algebraic_simplification(0);
887
		ornode = new_rd_Or(dbg, block, shl, shr, omode);
888
889
		restore_optimization_state(&state);

890
		exchange(node, ornode);
891
892
893
894
895
896

		/* do lowering on the new nodes */
		prepare_links(lenv, shl);
		prepare_links(lenv, c);
		prepare_links(lenv, sub);
		prepare_links(lenv, shr);
897
		prepare_links(lenv, ornode);
898
		return;
Michael Beck's avatar
Michael Beck committed
899
	}
900
901

	prepare_links(lenv, node);
Michael Beck's avatar
Michael Beck committed
902
}
Michael Beck's avatar
Michael Beck committed
903

904
905
906
907
908
/**
 * Translate an Unop.
 *
 * Create an intrinsic Call.
 */
909
910
static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env)
{
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
	ir_node            *op       = get_unop_op(node);
	const node_entry_t *op_entry = get_node_entry(env, op);
	ir_node            *in[2]    = { op_entry->low_word, op_entry->high_word };
	dbg_info           *dbgi     = get_irn_dbg_info(node);
	ir_node            *block    = get_nodes_block(node);
	ir_graph           *irg      = get_irn_irg(block);
	ir_type            *mtp      = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
	ir_op              *irop     = get_irn_op(node);
	ir_node            *addr     = get_intrinsic_address(mtp, irop, mode, mode, env);
	ir_node            *nomem    = get_irg_no_mem(irg);
	ir_node            *call     = new_rd_Call(dbgi, block, nomem, addr, 2, in, mtp);
	ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
	ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
	ir_node            *res_high = new_r_Proj(resproj, mode,              1);
	set_irn_pinned(call, get_irn_pinned(node));
	set_lowered(env, node, res_low, res_high);
927
}
928
929

/**
930
 * Translate a logical binop.
931
 *
932
 * Create two logical binops.
933
 */
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
static void lower_binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
								ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) )
{
	ir_node            *left        = get_binop_left(node);
	ir_node            *right       = get_binop_right(node);
	const node_entry_t *left_entry  = get_node_entry(env, left);
	const node_entry_t *right_entry = get_node_entry(env, right);
	dbg_info           *dbgi        = get_irn_dbg_info(node);
	ir_node            *block       = get_nodes_block(node);
	ir_node            *res_low
		= constr_rd(dbgi, block, left_entry->low_word, right_entry->low_word,
		            env->low_unsigned);
	ir_node            *res_high
		= constr_rd(dbgi, block, left_entry->high_word, right_entry->high_word,
		            mode);
	set_lowered(env, node, res_low, res_high);
}
951

952
953
954
static void lower_And(ir_node *node, ir_mode *mode, lower_env_t *env)
{
	lower_binop_logical(node, mode, env, new_rd_And);
955
}
956

957
958
959
static void lower_Or(ir_node *node, ir_mode *mode, lower_env_t *env)
{
	lower_binop_logical(node, mode, env, new_rd_Or);
960
961
}

962
963
964
965
static void lower_Eor(ir_node *node, ir_mode *mode, lower_env_t *env)
{
	lower_binop_logical(node, mode, env, new_rd_Eor);
}
966
967
968
969
970
971

/**
 * Translate a Not.
 *
 * Create two logical Nots.
 */
972
973
static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env)
{
974
975
976
977
978
979
980
981
982
	ir_node            *op       = get_Not_op(node);
	const node_entry_t *op_entry = get_node_entry(env, op);
	dbg_info           *dbgi     = get_irn_dbg_info(node);
	ir_node            *block    = get_nodes_block(node);
	ir_node            *res_low
		= new_rd_Not(dbgi, block, op_entry->low_word, env->low_unsigned);
	ir_node            *res_high
		= new_rd_Not(dbgi, block, op_entry->high_word, mode);
	set_lowered(env, node, res_low, res_high);
983
}
984
985
986
987

/**
 * Translate a Cond.
 */
988
989
static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env)
{
990
	ir_node *left, *right, *block;
991
992
	ir_node *sel = get_Cond_selector(node);
	ir_mode *m = get_irn_mode(sel);
993
994
995
	ir_mode *cmp_mode;
	const node_entry_t *lentry, *rentry;
	ir_node  *proj, *projT = NULL, *projF = NULL;
996
	ir_node  *new_bl, *irn;
997
998
	ir_node  *projHF, *projHT;
	ir_node  *dst_blk;
999
	ir_relation relation;
1000
1001
	ir_graph *irg;
	dbg_info *dbg;
1002

1003
	(void) mode;
1004

1005
1006
1007
1008
1009
	if (m != mode_b) {
		if (m == env->high_signed || m == env->high_unsigned) {
			/* bad we can't really handle Switch with 64bit offsets */
			panic("Cond with 64bit jumptable not supported");
		}
1010
		lower_node(env, sel);
1011
1012
		return;
	}
1013

1014
1015
	if (!is_Cmp(sel)) {
		lower_node(env, sel);
1016
		return;
1017
	}
1018

1019
	left     = get_Cmp_left(sel);
1020
	cmp_mode = get_irn_mode(left);
1021
1022
	if (cmp_mode != env->high_signed && cmp_mode != env->high_unsigned) {
		lower_node(env, sel);
1023
		return;
1024
	}
1025

1026
	right  = get_Cmp_right(sel);
1027
1028
	lower_node(env, left);
	lower_node(env, right);
1029
1030
	lentry = get_node_entry(env, left);
	rentry = get_node_entry(env, right);
1031

1032
	/* all right, build the code */
1033
1034
	for (proj = (ir_node*)get_irn_link(node); proj;
	     proj = (ir_node*)get_irn_link(proj)) {
1035
		long proj_nr = get_Proj_proj(proj);
1036