2 * Copyright (C) 1995-2010 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief The codegenerator (transform FIRM into arm FIRM)
23 * @author Matthias Braun, Oliver Richter, Tobias Gneist, Michael Beck
28 #include "irgraph_t.h"
43 #include "betranshlp.h"
44 #include "beabihelper.h"
47 #include "bearch_arm_t.h"
48 #include "arm_nodes_attr.h"
49 #include "arm_transform.h"
50 #include "arm_optimize.h"
51 #include "arm_new_nodes.h"
52 #include "arm_map_regs.h"
53 #include "arm_cconv.h"
55 #include "gen_arm_regalloc_if.h"
59 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
61 static const arch_register_t *sp_reg = &arm_registers[REG_SP];
62 static ir_mode *mode_gp;
63 static ir_mode *mode_fp;
64 static beabi_helper_env_t *abihelper;
65 static be_stackorder_t *stackorder;
66 static calling_convention_t *cconv = NULL;
67 static arm_isa_t *isa;
69 static pmap *node_to_stack;
71 static const arch_register_t *const callee_saves[] = {
72 &arm_registers[REG_R4],
73 &arm_registers[REG_R5],
74 &arm_registers[REG_R6],
75 &arm_registers[REG_R7],
76 &arm_registers[REG_R8],
77 &arm_registers[REG_R9],
78 &arm_registers[REG_R10],
79 &arm_registers[REG_R11],
80 &arm_registers[REG_LR],
83 static const arch_register_t *const caller_saves[] = {
84 &arm_registers[REG_R0],
85 &arm_registers[REG_R1],
86 &arm_registers[REG_R2],
87 &arm_registers[REG_R3],
88 &arm_registers[REG_LR],
90 &arm_registers[REG_F0],
91 &arm_registers[REG_F1],
92 &arm_registers[REG_F2],
93 &arm_registers[REG_F3],
94 &arm_registers[REG_F4],
95 &arm_registers[REG_F5],
96 &arm_registers[REG_F6],
97 &arm_registers[REG_F7],
100 static bool mode_needs_gp_reg(ir_mode *mode)
102 return mode_is_int(mode) || mode_is_reference(mode);
106 * create firm graph for a constant
108 static ir_node *create_const_graph_value(dbg_info *dbgi, ir_node *block,
115 /* We only have 8 bit immediates. So we possibly have to combine several
116 * operations to construct the desired value.
118 * we can either create the value by adding bits to 0 or by removing bits
119 * from an register with all bits set. Try which alternative needs fewer
121 arm_gen_vals_from_word(value, &v);
122 arm_gen_vals_from_word(~value, &vn);
124 if (vn.ops < v.ops) {
126 result = new_bd_arm_Mvn_imm(dbgi, block, vn.values[0], vn.rors[0]);
128 for (cnt = 1; cnt < vn.ops; ++cnt) {
129 result = new_bd_arm_Bic_imm(dbgi, block, result,
130 vn.values[cnt], vn.rors[cnt]);
134 result = new_bd_arm_Mov_imm(dbgi, block, v.values[0], v.rors[0]);
136 for (cnt = 1; cnt < v.ops; ++cnt) {
137 result = new_bd_arm_Or_imm(dbgi, block, result,
138 v.values[cnt], v.rors[cnt]);
145 * Create a DAG constructing a given Const.
147 * @param irn a Firm const
149 static ir_node *create_const_graph(ir_node *irn, ir_node *block)
151 ir_tarval *tv = get_Const_tarval(irn);
152 ir_mode *mode = get_tarval_mode(tv);
155 if (mode_is_reference(mode)) {
156 /* ARM is 32bit, so we can safely convert a reference tarval into Iu */
157 assert(get_mode_size_bits(mode) == get_mode_size_bits(mode_Iu));
158 tv = tarval_convert_to(tv, mode_Iu);
160 value = get_tarval_long(tv);
161 return create_const_graph_value(get_irn_dbg_info(irn), block, value);
165 * Create an And that will zero out upper bits.
167 * @param dbgi debug info
168 * @param block the basic block
169 * @param op the original node
170 * param src_bits number of lower bits that will remain
172 static ir_node *gen_zero_extension(dbg_info *dbgi, ir_node *block, ir_node *op,
176 return new_bd_arm_And_imm(dbgi, block, op, 0xFF, 0);
177 } else if (src_bits == 16) {
178 ir_node *lshift = new_bd_arm_Mov_reg_shift_imm(dbgi, block, op, ARM_SHF_LSL_IMM, 16);
179 ir_node *rshift = new_bd_arm_Mov_reg_shift_imm(dbgi, block, lshift, ARM_SHF_LSR_IMM, 16);
182 panic("zero extension only supported for 8 and 16 bits");
187 * Generate code for a sign extension.
189 static ir_node *gen_sign_extension(dbg_info *dbgi, ir_node *block, ir_node *op,
192 int shift_width = 32 - src_bits;
193 ir_node *lshift_node = new_bd_arm_Mov_reg_shift_imm(dbgi, block, op, ARM_SHF_LSL_IMM, shift_width);
194 ir_node *rshift_node = new_bd_arm_Mov_reg_shift_imm(dbgi, block, lshift_node, ARM_SHF_ASR_IMM, shift_width);
198 static ir_node *gen_extension(dbg_info *dbgi, ir_node *block, ir_node *op,
201 int bits = get_mode_size_bits(orig_mode);
205 if (mode_is_signed(orig_mode)) {
206 return gen_sign_extension(dbgi, block, op, bits);
208 return gen_zero_extension(dbgi, block, op, bits);
213 * returns true if it is assured, that the upper bits of a node are "clean"
214 * which means for a 16 or 8 bit value, that the upper bits in the register
215 * are 0 for unsigned and a copy of the last significant bit for signed
218 static bool upper_bits_clean(ir_node *transformed_node, ir_mode *mode)
220 (void) transformed_node;
227 * Transforms a Conv node.
229 * @return The created ia32 Conv node
231 static ir_node *gen_Conv(ir_node *node)
233 ir_node *block = be_transform_node(get_nodes_block(node));
234 ir_node *op = get_Conv_op(node);
235 ir_node *new_op = be_transform_node(op);
236 ir_mode *src_mode = get_irn_mode(op);
237 ir_mode *dst_mode = get_irn_mode(node);
238 dbg_info *dbg = get_irn_dbg_info(node);
240 if (src_mode == dst_mode)
243 if (mode_is_float(src_mode) || mode_is_float(dst_mode)) {
245 if (mode_is_float(src_mode)) {
246 if (mode_is_float(dst_mode)) {
247 /* from float to float */
248 return new_bd_arm_Mvf(dbg, block, new_op, dst_mode);
250 /* from float to int */
254 /* from int to float */
255 if (!mode_is_signed(src_mode)) {
258 return new_bd_arm_FltX(dbg, block, new_op, dst_mode);
261 } else if (USE_VFP(isa)) {
262 panic("VFP not supported yet");
264 panic("Softfloat not supported yet");
266 } else { /* complete in gp registers */
267 int src_bits = get_mode_size_bits(src_mode);
268 int dst_bits = get_mode_size_bits(dst_mode);
272 if (src_bits == dst_bits) {
273 /* kill unnecessary conv */
277 if (src_bits < dst_bits) {
285 if (upper_bits_clean(new_op, min_mode)) {
289 if (mode_is_signed(min_mode)) {
290 return gen_sign_extension(dbg, block, new_op, min_bits);
292 return gen_zero_extension(dbg, block, new_op, min_bits);
302 static bool try_encode_as_immediate(const ir_node *node, arm_immediate_t *res)
304 unsigned val, low_pos, high_pos;
309 val = get_tarval_long(get_Const_tarval(node));
321 /* arm allows to use to rotate an 8bit immediate value by a multiple of 2
323 So we determine the smallest even position with a bit set
324 and the highest even position with no bit set anymore.
325 If the difference between these 2 is <= 8, then we can encode the value
328 low_pos = ntz(val) & ~1u;
329 high_pos = (32-nlz(val)+1) & ~1u;
331 if (high_pos - low_pos <= 8) {
332 res->imm_8 = val >> low_pos;
333 res->rot = 32 - low_pos;
338 res->rot = 34 - high_pos;
339 val = val >> (32-res->rot) | val << (res->rot);
349 static bool is_downconv(const ir_node *node)
357 /* we only want to skip the conv when we're the only user
358 * (not optimal but for now...)
360 if (get_irn_n_edges(node) > 1)
363 src_mode = get_irn_mode(get_Conv_op(node));
364 dest_mode = get_irn_mode(node);
366 mode_needs_gp_reg(src_mode) &&
367 mode_needs_gp_reg(dest_mode) &&
368 get_mode_size_bits(dest_mode) <= get_mode_size_bits(src_mode);
371 static ir_node *arm_skip_downconv(ir_node *node)
373 while (is_downconv(node))
374 node = get_Conv_op(node);
380 MATCH_COMMUTATIVE = 1 << 0, /**< commutative node */
381 MATCH_REVERSE = 1 << 1, /**< support reverse opcode */
382 MATCH_SIZE_NEUTRAL = 1 << 2,
383 MATCH_SKIP_NOT = 1 << 3, /**< skip Not on ONE input */
385 ENUM_BITSET(match_flags_t)
388 * possible binop constructors.
390 typedef struct arm_binop_factory_t {
391 /** normal reg op reg operation. */
392 ir_node *(*new_binop_reg)(dbg_info *dbgi, ir_node *block, ir_node *op1, ir_node *op2);
393 /** normal reg op imm operation. */
394 ir_node *(*new_binop_imm)(dbg_info *dbgi, ir_node *block, ir_node *op1, unsigned char imm8, unsigned char imm_rot);
395 /** barrel shifter reg op (reg shift reg operation. */
396 ir_node *(*new_binop_reg_shift_reg)(dbg_info *dbgi, ir_node *block, ir_node *left, ir_node *right, ir_node *shift, arm_shift_modifier_t shift_modifier);
397 /** barrel shifter reg op (reg shift imm operation. */
398 ir_node *(*new_binop_reg_shift_imm)(dbg_info *dbgi, ir_node *block, ir_node *left, ir_node *right, arm_shift_modifier_t shift_modifier, unsigned shift_immediate);
399 } arm_binop_factory_t;
401 static ir_node *gen_int_binop(ir_node *node, match_flags_t flags,
402 const arm_binop_factory_t *factory)
404 ir_node *block = be_transform_node(get_nodes_block(node));
405 ir_node *op1 = get_binop_left(node);
407 ir_node *op2 = get_binop_right(node);
409 dbg_info *dbgi = get_irn_dbg_info(node);
412 if (flags & MATCH_SKIP_NOT) {
414 op1 = get_Not_op(op1);
415 else if (is_Not(op2))
416 op2 = get_Not_op(op2);
418 panic("cannot execute MATCH_SKIP_NOT");
420 if (flags & MATCH_SIZE_NEUTRAL) {
421 op1 = arm_skip_downconv(op1);
422 op2 = arm_skip_downconv(op2);
424 assert(get_mode_size_bits(get_irn_mode(node)) == 32);
427 if (try_encode_as_immediate(op2, &imm)) {
428 new_op1 = be_transform_node(op1);
429 return factory->new_binop_imm(dbgi, block, new_op1, imm.imm_8, imm.rot);
431 new_op2 = be_transform_node(op2);
432 if ((flags & (MATCH_COMMUTATIVE|MATCH_REVERSE)) && try_encode_as_immediate(op1, &imm)) {
433 if (flags & MATCH_REVERSE)
434 return factory[1].new_binop_imm(dbgi, block, new_op2, imm.imm_8, imm.rot);
436 return factory[0].new_binop_imm(dbgi, block, new_op2, imm.imm_8, imm.rot);
438 new_op1 = be_transform_node(op1);
440 /* check if we can fold in a Mov */
441 if (is_arm_Mov(new_op2)) {
442 const arm_shifter_operand_t *attr = get_arm_shifter_operand_attr_const(new_op2);
444 switch (attr->shift_modifier) {
446 case ARM_SHF_ASR_IMM:
447 case ARM_SHF_LSL_IMM:
448 case ARM_SHF_LSR_IMM:
449 case ARM_SHF_ROR_IMM:
450 if (factory->new_binop_reg_shift_imm) {
451 ir_node *mov_op = get_irn_n(new_op2, 0);
452 return factory->new_binop_reg_shift_imm(dbgi, block, new_op1, mov_op,
453 attr->shift_modifier, attr->shift_immediate);
457 case ARM_SHF_ASR_REG:
458 case ARM_SHF_LSL_REG:
459 case ARM_SHF_LSR_REG:
460 case ARM_SHF_ROR_REG:
461 if (factory->new_binop_reg_shift_reg) {
462 ir_node *mov_op = get_irn_n(new_op2, 0);
463 ir_node *mov_sft = get_irn_n(new_op2, 1);
464 return factory->new_binop_reg_shift_reg(dbgi, block, new_op1, mov_op, mov_sft,
465 attr->shift_modifier);
471 case ARM_SHF_INVALID:
472 panic("invalid shift");
475 if ((flags & (MATCH_COMMUTATIVE|MATCH_REVERSE)) && is_arm_Mov(new_op1)) {
476 const arm_shifter_operand_t *attr = get_arm_shifter_operand_attr_const(new_op1);
477 int idx = flags & MATCH_REVERSE ? 1 : 0;
479 switch (attr->shift_modifier) {
480 ir_node *mov_op, *mov_sft;
483 case ARM_SHF_ASR_IMM:
484 case ARM_SHF_LSL_IMM:
485 case ARM_SHF_LSR_IMM:
486 case ARM_SHF_ROR_IMM:
487 if (factory[idx].new_binop_reg_shift_imm) {
488 mov_op = get_irn_n(new_op1, 0);
489 return factory[idx].new_binop_reg_shift_imm(dbgi, block, new_op2, mov_op,
490 attr->shift_modifier, attr->shift_immediate);
494 case ARM_SHF_ASR_REG:
495 case ARM_SHF_LSL_REG:
496 case ARM_SHF_LSR_REG:
497 case ARM_SHF_ROR_REG:
498 if (factory[idx].new_binop_reg_shift_reg) {
499 mov_op = get_irn_n(new_op1, 0);
500 mov_sft = get_irn_n(new_op1, 1);
501 return factory[idx].new_binop_reg_shift_reg(dbgi, block, new_op2, mov_op, mov_sft,
502 attr->shift_modifier);
509 case ARM_SHF_INVALID:
510 panic("invalid shift");
513 return factory->new_binop_reg(dbgi, block, new_op1, new_op2);
517 * Creates an ARM Add.
519 * @return the created arm Add node
521 static ir_node *gen_Add(ir_node *node)
523 static const arm_binop_factory_t add_factory = {
526 new_bd_arm_Add_reg_shift_reg,
527 new_bd_arm_Add_reg_shift_imm
530 ir_mode *mode = get_irn_mode(node);
532 if (mode_is_float(mode)) {
533 ir_node *block = be_transform_node(get_nodes_block(node));
534 ir_node *op1 = get_Add_left(node);
535 ir_node *op2 = get_Add_right(node);
536 dbg_info *dbgi = get_irn_dbg_info(node);
537 ir_node *new_op1 = be_transform_node(op1);
538 ir_node *new_op2 = be_transform_node(op2);
540 return new_bd_arm_Adf(dbgi, block, new_op1, new_op2, mode);
541 } else if (USE_VFP(isa)) {
542 panic("VFP not supported yet");
544 panic("Softfloat not supported yet");
547 /* TODO: check for MLA */
548 return gen_int_binop(node, MATCH_COMMUTATIVE | MATCH_SIZE_NEUTRAL, &add_factory);
553 * Creates an ARM Mul.
555 * @return the created arm Mul node
557 static ir_node *gen_Mul(ir_node *node)
559 ir_node *block = be_transform_node(get_nodes_block(node));
560 ir_node *op1 = get_Mul_left(node);
561 ir_node *new_op1 = be_transform_node(op1);
562 ir_node *op2 = get_Mul_right(node);
563 ir_node *new_op2 = be_transform_node(op2);
564 ir_mode *mode = get_irn_mode(node);
565 dbg_info *dbg = get_irn_dbg_info(node);
567 if (mode_is_float(mode)) {
569 return new_bd_arm_Muf(dbg, block, new_op1, new_op2, mode);
570 } else if (USE_VFP(isa)) {
571 panic("VFP not supported yet");
573 panic("Softfloat not supported yet");
576 assert(mode_is_data(mode));
577 return new_bd_arm_Mul(dbg, block, new_op1, new_op2);
580 static ir_node *gen_Div(ir_node *node)
582 ir_node *block = be_transform_node(get_nodes_block(node));
583 ir_node *op1 = get_Div_left(node);
584 ir_node *new_op1 = be_transform_node(op1);
585 ir_node *op2 = get_Div_right(node);
586 ir_node *new_op2 = be_transform_node(op2);
587 ir_mode *mode = get_Div_resmode(node);
588 dbg_info *dbg = get_irn_dbg_info(node);
590 /* integer division should be replaced by builtin call */
591 assert(mode_is_float(mode));
594 return new_bd_arm_Dvf(dbg, block, new_op1, new_op2, mode);
595 } else if (USE_VFP(isa)) {
596 panic("VFP not supported yet");
598 panic("Softfloat not supported yet");
602 static ir_node *gen_And(ir_node *node)
604 static const arm_binop_factory_t and_factory = {
607 new_bd_arm_And_reg_shift_reg,
608 new_bd_arm_And_reg_shift_imm
610 static const arm_binop_factory_t bic_factory = {
613 new_bd_arm_Bic_reg_shift_reg,
614 new_bd_arm_Bic_reg_shift_imm
617 /* check for and not */
618 ir_node *left = get_And_left(node);
619 ir_node *right = get_And_right(node);
621 if (is_Not(left) || is_Not(right)) {
622 return gen_int_binop(node, MATCH_COMMUTATIVE | MATCH_SIZE_NEUTRAL | MATCH_SKIP_NOT,
626 return gen_int_binop(node, MATCH_COMMUTATIVE | MATCH_SIZE_NEUTRAL, &and_factory);
629 static ir_node *gen_Or(ir_node *node)
631 static const arm_binop_factory_t or_factory = {
634 new_bd_arm_Or_reg_shift_reg,
635 new_bd_arm_Or_reg_shift_imm
638 return gen_int_binop(node, MATCH_COMMUTATIVE | MATCH_SIZE_NEUTRAL, &or_factory);
641 static ir_node *gen_Eor(ir_node *node)
643 static const arm_binop_factory_t eor_factory = {
646 new_bd_arm_Eor_reg_shift_reg,
647 new_bd_arm_Eor_reg_shift_imm
650 return gen_int_binop(node, MATCH_COMMUTATIVE | MATCH_SIZE_NEUTRAL, &eor_factory);
653 static ir_node *gen_Sub(ir_node *node)
655 static const arm_binop_factory_t sub_rsb_factory[2] = {
659 new_bd_arm_Sub_reg_shift_reg,
660 new_bd_arm_Sub_reg_shift_imm
665 new_bd_arm_Rsb_reg_shift_reg,
666 new_bd_arm_Rsb_reg_shift_imm
670 ir_node *block = be_transform_node(get_nodes_block(node));
671 ir_node *op1 = get_Sub_left(node);
672 ir_node *new_op1 = be_transform_node(op1);
673 ir_node *op2 = get_Sub_right(node);
674 ir_node *new_op2 = be_transform_node(op2);
675 ir_mode *mode = get_irn_mode(node);
676 dbg_info *dbgi = get_irn_dbg_info(node);
678 if (mode_is_float(mode)) {
680 return new_bd_arm_Suf(dbgi, block, new_op1, new_op2, mode);
681 } else if (USE_VFP(isa)) {
682 panic("VFP not supported yet");
684 panic("Softfloat not supported yet");
687 return gen_int_binop(node, MATCH_SIZE_NEUTRAL | MATCH_REVERSE, sub_rsb_factory);
692 * Checks if a given value can be used as an immediate for the given
695 static bool can_use_shift_constant(unsigned int val,
696 arm_shift_modifier_t modifier)
700 if (val == 32 && modifier != ARM_SHF_LSL_REG && modifier != ARM_SHF_ROR_REG)
706 * generate an ARM shift instruction.
708 * @param node the node
709 * @param flags matching flags
710 * @param shift_modifier initial encoding of the desired shift operation
712 static ir_node *make_shift(ir_node *node, match_flags_t flags,
713 arm_shift_modifier_t shift_modifier)
715 ir_node *block = be_transform_node(get_nodes_block(node));
716 ir_node *op1 = get_binop_left(node);
717 ir_node *op2 = get_binop_right(node);
718 dbg_info *dbgi = get_irn_dbg_info(node);
719 ir_mode *mode = get_irn_mode(node);
723 if (get_mode_modulo_shift(mode) != 32)
724 panic("modulo shift!=32 not supported");
726 if (flags & MATCH_SIZE_NEUTRAL) {
727 op1 = arm_skip_downconv(op1);
728 op2 = arm_skip_downconv(op2);
731 new_op1 = be_transform_node(op1);
733 ir_tarval *tv = get_Const_tarval(op2);
734 unsigned int val = get_tarval_long(tv);
735 assert(tarval_is_long(tv));
736 if (can_use_shift_constant(val, shift_modifier)) {
737 switch (shift_modifier) {
738 case ARM_SHF_LSL_REG: shift_modifier = ARM_SHF_LSL_IMM; break;
739 case ARM_SHF_LSR_REG: shift_modifier = ARM_SHF_LSR_IMM; break;
740 case ARM_SHF_ASR_REG: shift_modifier = ARM_SHF_ASR_IMM; break;
741 case ARM_SHF_ROR_REG: shift_modifier = ARM_SHF_ROR_IMM; break;
742 default: panic("unexpected shift modifier");
744 return new_bd_arm_Mov_reg_shift_imm(dbgi, block, new_op1,
745 shift_modifier, val);
749 new_op2 = be_transform_node(op2);
750 return new_bd_arm_Mov_reg_shift_reg(dbgi, block, new_op1, new_op2,
754 static ir_node *gen_Shl(ir_node *node)
756 return make_shift(node, MATCH_SIZE_NEUTRAL, ARM_SHF_LSL_REG);
759 static ir_node *gen_Shr(ir_node *node)
761 return make_shift(node, MATCH_NONE, ARM_SHF_LSR_REG);
764 static ir_node *gen_Shrs(ir_node *node)
766 return make_shift(node, MATCH_NONE, ARM_SHF_ASR_REG);
769 static ir_node *gen_Ror(ir_node *node, ir_node *op1, ir_node *op2)
771 ir_node *block = be_transform_node(get_nodes_block(node));
772 ir_node *new_op1 = be_transform_node(op1);
773 dbg_info *dbgi = get_irn_dbg_info(node);
774 ir_node *new_op2 = be_transform_node(op2);
776 return new_bd_arm_Mov_reg_shift_reg(dbgi, block, new_op1, new_op2,
780 static ir_node *gen_Rol(ir_node *node, ir_node *op1, ir_node *op2)
782 ir_node *block = be_transform_node(get_nodes_block(node));
783 ir_node *new_op1 = be_transform_node(op1);
784 dbg_info *dbgi = get_irn_dbg_info(node);
785 ir_node *new_op2 = be_transform_node(op2);
787 /* Note: there is no Rol on arm, we have to use Ror */
788 new_op2 = new_bd_arm_Rsb_imm(dbgi, block, new_op2, 32, 0);
789 return new_bd_arm_Mov_reg_shift_reg(dbgi, block, new_op1, new_op2,
793 static ir_node *gen_Rotl(ir_node *node)
795 ir_node *rotate = NULL;
796 ir_node *op1 = get_Rotl_left(node);
797 ir_node *op2 = get_Rotl_right(node);
799 /* Firm has only RotL, so we are looking for a right (op2)
800 operand "-e+mode_size_bits" (it's an already modified "mode_size_bits-e",
801 that means we can create a RotR. */
804 ir_node *right = get_Add_right(op2);
805 if (is_Const(right)) {
806 ir_tarval *tv = get_Const_tarval(right);
807 ir_mode *mode = get_irn_mode(node);
808 long bits = get_mode_size_bits(mode);
809 ir_node *left = get_Add_left(op2);
811 if (is_Minus(left) &&
812 tarval_is_long(tv) &&
813 get_tarval_long(tv) == bits &&
815 rotate = gen_Ror(node, op1, get_Minus_op(left));
817 } else if (is_Sub(op2)) {
818 ir_node *left = get_Sub_left(op2);
819 if (is_Const(left)) {
820 ir_tarval *tv = get_Const_tarval(left);
821 ir_mode *mode = get_irn_mode(node);
822 long bits = get_mode_size_bits(mode);
823 ir_node *right = get_Sub_right(op2);
825 if (tarval_is_long(tv) &&
826 get_tarval_long(tv) == bits &&
828 rotate = gen_Ror(node, op1, right);
830 } else if (is_Const(op2)) {
831 ir_tarval *tv = get_Const_tarval(op2);
832 ir_mode *mode = get_irn_mode(node);
833 long bits = get_mode_size_bits(mode);
835 if (tarval_is_long(tv) && bits == 32) {
836 ir_node *block = be_transform_node(get_nodes_block(node));
837 ir_node *new_op1 = be_transform_node(op1);
838 dbg_info *dbgi = get_irn_dbg_info(node);
840 bits = (bits - get_tarval_long(tv)) & 31;
841 rotate = new_bd_arm_Mov_reg_shift_imm(dbgi, block, new_op1, ARM_SHF_ROR_IMM, bits);
845 if (rotate == NULL) {
846 rotate = gen_Rol(node, op1, op2);
852 static ir_node *gen_Not(ir_node *node)
854 ir_node *block = be_transform_node(get_nodes_block(node));
855 ir_node *op = get_Not_op(node);
856 ir_node *new_op = be_transform_node(op);
857 dbg_info *dbgi = get_irn_dbg_info(node);
859 /* check if we can fold in a Mov */
860 if (is_arm_Mov(new_op)) {
861 const arm_shifter_operand_t *attr = get_arm_shifter_operand_attr_const(new_op);
863 switch (attr->shift_modifier) {
864 ir_node *mov_op, *mov_sft;
867 case ARM_SHF_ASR_IMM:
868 case ARM_SHF_LSL_IMM:
869 case ARM_SHF_LSR_IMM:
870 case ARM_SHF_ROR_IMM:
871 mov_op = get_irn_n(new_op, 0);
872 return new_bd_arm_Mvn_reg_shift_imm(dbgi, block, mov_op,
873 attr->shift_modifier, attr->shift_immediate);
875 case ARM_SHF_ASR_REG:
876 case ARM_SHF_LSL_REG:
877 case ARM_SHF_LSR_REG:
878 case ARM_SHF_ROR_REG:
879 mov_op = get_irn_n(new_op, 0);
880 mov_sft = get_irn_n(new_op, 1);
881 return new_bd_arm_Mvn_reg_shift_reg(dbgi, block, mov_op, mov_sft,
882 attr->shift_modifier);
887 case ARM_SHF_INVALID:
888 panic("invalid shift");
892 return new_bd_arm_Mvn_reg(dbgi, block, new_op);
895 static ir_node *gen_Minus(ir_node *node)
897 ir_node *block = be_transform_node(get_nodes_block(node));
898 ir_node *op = get_Minus_op(node);
899 ir_node *new_op = be_transform_node(op);
900 dbg_info *dbgi = get_irn_dbg_info(node);
901 ir_mode *mode = get_irn_mode(node);
903 if (mode_is_float(mode)) {
905 return new_bd_arm_Mvf(dbgi, block, op, mode);
906 } else if (USE_VFP(isa)) {
907 panic("VFP not supported yet");
909 panic("Softfloat not supported yet");
912 assert(mode_is_data(mode));
913 return new_bd_arm_Rsb_imm(dbgi, block, new_op, 0, 0);
916 static ir_node *gen_Load(ir_node *node)
918 ir_node *block = be_transform_node(get_nodes_block(node));
919 ir_node *ptr = get_Load_ptr(node);
920 ir_node *new_ptr = be_transform_node(ptr);
921 ir_node *mem = get_Load_mem(node);
922 ir_node *new_mem = be_transform_node(mem);
923 ir_mode *mode = get_Load_mode(node);
924 dbg_info *dbgi = get_irn_dbg_info(node);
925 ir_node *new_load = NULL;
927 if (get_Load_unaligned(node) == align_non_aligned)
928 panic("unaligned Loads not supported yet");
930 if (mode_is_float(mode)) {
932 new_load = new_bd_arm_Ldf(dbgi, block, new_ptr, new_mem, mode,
934 } else if (USE_VFP(isa)) {
935 panic("VFP not supported yet");
937 panic("Softfloat not supported yet");
940 assert(mode_is_data(mode) && "unsupported mode for Load");
942 new_load = new_bd_arm_Ldr(dbgi, block, new_ptr, new_mem, mode, NULL, 0, 0, false);
944 set_irn_pinned(new_load, get_irn_pinned(node));
946 /* check for special case: the loaded value might not be used */
947 if (be_get_Proj_for_pn(node, pn_Load_res) == NULL) {
948 /* add a result proj and a Keep to produce a pseudo use */
949 ir_node *proj = new_r_Proj(new_load, mode_Iu, pn_arm_Ldr_res);
950 be_new_Keep(block, 1, &proj);
956 static ir_node *gen_Store(ir_node *node)
958 ir_node *block = be_transform_node(get_nodes_block(node));
959 ir_node *ptr = get_Store_ptr(node);
960 ir_node *new_ptr = be_transform_node(ptr);
961 ir_node *mem = get_Store_mem(node);
962 ir_node *new_mem = be_transform_node(mem);
963 ir_node *val = get_Store_value(node);
964 ir_node *new_val = be_transform_node(val);
965 ir_mode *mode = get_irn_mode(val);
966 dbg_info *dbgi = get_irn_dbg_info(node);
967 ir_node *new_store = NULL;
969 if (get_Store_unaligned(node) == align_non_aligned)
970 panic("unaligned Stores not supported yet");
972 if (mode_is_float(mode)) {
974 new_store = new_bd_arm_Stf(dbgi, block, new_ptr, new_val,
975 new_mem, mode, NULL, 0, 0, false);
976 } else if (USE_VFP(isa)) {
977 panic("VFP not supported yet");
979 panic("Softfloat not supported yet");
982 assert(mode_is_data(mode) && "unsupported mode for Store");
983 new_store = new_bd_arm_Str(dbgi, block, new_ptr, new_val, new_mem, mode,
986 set_irn_pinned(new_store, get_irn_pinned(node));
990 static ir_node *gen_Jmp(ir_node *node)
992 ir_node *block = get_nodes_block(node);
993 ir_node *new_block = be_transform_node(block);
994 dbg_info *dbgi = get_irn_dbg_info(node);
996 return new_bd_arm_Jmp(dbgi, new_block);
999 static ir_node *gen_Switch(ir_node *node)
1001 ir_graph *irg = get_irn_irg(node);
1002 ir_node *block = be_transform_node(get_nodes_block(node));
1003 ir_node *selector = get_Switch_selector(node);
1004 dbg_info *dbgi = get_irn_dbg_info(node);
1005 ir_node *new_op = be_transform_node(selector);
1006 ir_mode *mode = get_irn_mode(selector);
1007 const ir_switch_table *table = get_Switch_table(node);
1008 unsigned n_outs = get_Switch_n_outs(node);
1010 table = ir_switch_table_duplicate(irg, table);
1012 /* switch with smaller modes not implemented yet */
1013 assert(get_mode_size_bits(mode) == 32);
1015 return new_bd_arm_SwitchJmp(dbgi, block, new_op, n_outs, table);
1018 static ir_node *gen_Cmp(ir_node *node)
1020 ir_node *block = be_transform_node(get_nodes_block(node));
1021 ir_node *op1 = get_Cmp_left(node);
1022 ir_node *op2 = get_Cmp_right(node);
1023 ir_mode *cmp_mode = get_irn_mode(op1);
1024 dbg_info *dbgi = get_irn_dbg_info(node);
1029 if (mode_is_float(cmp_mode)) {
1030 /* TODO: this is broken... */
1031 new_op1 = be_transform_node(op1);
1032 new_op2 = be_transform_node(op2);
1034 return new_bd_arm_Cmfe(dbgi, block, new_op1, new_op2, false);
1037 assert(get_irn_mode(op2) == cmp_mode);
1038 is_unsigned = !mode_is_signed(cmp_mode);
1040 /* integer compare, TODO: use shifter_op in all its combinations */
1041 new_op1 = be_transform_node(op1);
1042 new_op1 = gen_extension(dbgi, block, new_op1, cmp_mode);
1043 new_op2 = be_transform_node(op2);
1044 new_op2 = gen_extension(dbgi, block, new_op2, cmp_mode);
1045 return new_bd_arm_Cmp_reg(dbgi, block, new_op1, new_op2, false,
1049 static ir_node *gen_Cond(ir_node *node)
1051 ir_node *const block = be_transform_node(get_nodes_block(node));
1052 dbg_info *const dbgi = get_irn_dbg_info(node);
1053 ir_node *const selector = get_Cond_selector(node);
1054 ir_node *const flag_node = be_transform_node(selector);
1055 ir_relation const relation = get_Cmp_relation(selector);
1056 return new_bd_arm_B(dbgi, block, flag_node, relation);
1062 FPA_IMM_MAX = FPA_IMM_DOUBLE
1065 static ir_tarval *fpa_imm[FPA_IMM_MAX + 1][fpa_max];
1067 static ir_node *gen_Const(ir_node *node)
1069 ir_node *block = be_transform_node(get_nodes_block(node));
1070 ir_mode *mode = get_irn_mode(node);
1071 dbg_info *dbg = get_irn_dbg_info(node);
1073 if (mode_is_float(mode)) {
1075 ir_tarval *tv = get_Const_tarval(node);
1076 node = new_bd_arm_fConst(dbg, block, tv);
1078 } else if (USE_VFP(isa)) {
1079 panic("VFP not supported yet");
1081 panic("Softfloat not supported yet");
1084 return create_const_graph(node, block);
1087 static ir_node *gen_SymConst(ir_node *node)
1089 ir_node *block = be_transform_node(get_nodes_block(node));
1090 ir_entity *entity = get_SymConst_entity(node);
1091 dbg_info *dbgi = get_irn_dbg_info(node);
1094 new_node = new_bd_arm_SymConst(dbgi, block, entity, 0);
1098 static ir_node *ints_to_double(dbg_info *dbgi, ir_node *block, ir_node *node0,
1101 /* the good way to do this would be to use the stm (store multiple)
1102 * instructions, since our input is nearly always 2 consecutive 32bit
1104 ir_graph *irg = get_Block_irg(block);
1105 ir_node *stack = get_irg_frame(irg);
1106 ir_node *nomem = get_irg_no_mem(irg);
1107 ir_node *str0 = new_bd_arm_Str(dbgi, block, stack, node0, nomem, mode_gp,
1109 ir_node *str1 = new_bd_arm_Str(dbgi, block, stack, node1, nomem, mode_gp,
1111 ir_node *in[2] = { str0, str1 };
1112 ir_node *sync = new_r_Sync(block, 2, in);
1114 set_irn_pinned(str0, op_pin_state_floats);
1115 set_irn_pinned(str1, op_pin_state_floats);
1117 ldf = new_bd_arm_Ldf(dbgi, block, stack, sync, mode_D, NULL, 0, 0, true);
1118 set_irn_pinned(ldf, op_pin_state_floats);
1120 return new_r_Proj(ldf, mode_fp, pn_arm_Ldf_res);
1123 static ir_node *int_to_float(dbg_info *dbgi, ir_node *block, ir_node *node)
1125 ir_graph *irg = get_Block_irg(block);
1126 ir_node *stack = get_irg_frame(irg);
1127 ir_node *nomem = get_irg_no_mem(irg);
1128 ir_node *str = new_bd_arm_Str(dbgi, block, stack, node, nomem, mode_gp,
1131 set_irn_pinned(str, op_pin_state_floats);
1133 ldf = new_bd_arm_Ldf(dbgi, block, stack, str, mode_F, NULL, 0, 0, true);
1134 set_irn_pinned(ldf, op_pin_state_floats);
1136 return new_r_Proj(ldf, mode_fp, pn_arm_Ldf_res);
1139 static ir_node *float_to_int(dbg_info *dbgi, ir_node *block, ir_node *node)
1141 ir_graph *irg = get_Block_irg(block);
1142 ir_node *stack = get_irg_frame(irg);
1143 ir_node *nomem = get_irg_no_mem(irg);
1144 ir_node *stf = new_bd_arm_Stf(dbgi, block, stack, node, nomem, mode_F,
1147 set_irn_pinned(stf, op_pin_state_floats);
1149 ldr = new_bd_arm_Ldr(dbgi, block, stack, stf, mode_gp, NULL, 0, 0, true);
1150 set_irn_pinned(ldr, op_pin_state_floats);
1152 return new_r_Proj(ldr, mode_gp, pn_arm_Ldr_res);
1155 static void double_to_ints(dbg_info *dbgi, ir_node *block, ir_node *node,
1156 ir_node **out_value0, ir_node **out_value1)
1158 ir_graph *irg = get_Block_irg(block);
1159 ir_node *stack = get_irg_frame(irg);
1160 ir_node *nomem = get_irg_no_mem(irg);
1161 ir_node *stf = new_bd_arm_Stf(dbgi, block, stack, node, nomem, mode_D,
1163 ir_node *ldr0, *ldr1;
1164 set_irn_pinned(stf, op_pin_state_floats);
1166 ldr0 = new_bd_arm_Ldr(dbgi, block, stack, stf, mode_gp, NULL, 0, 0, true);
1167 set_irn_pinned(ldr0, op_pin_state_floats);
1168 ldr1 = new_bd_arm_Ldr(dbgi, block, stack, stf, mode_gp, NULL, 0, 4, true);
1169 set_irn_pinned(ldr1, op_pin_state_floats);
1171 *out_value0 = new_r_Proj(ldr0, mode_gp, pn_arm_Ldr_res);
1172 *out_value1 = new_r_Proj(ldr1, mode_gp, pn_arm_Ldr_res);
1175 static ir_node *gen_CopyB(ir_node *node)
1177 ir_node *block = be_transform_node(get_nodes_block(node));
1178 ir_node *src = get_CopyB_src(node);
1179 ir_node *new_src = be_transform_node(src);
1180 ir_node *dst = get_CopyB_dst(node);
1181 ir_node *new_dst = be_transform_node(dst);
1182 ir_node *mem = get_CopyB_mem(node);
1183 ir_node *new_mem = be_transform_node(mem);
1184 dbg_info *dbg = get_irn_dbg_info(node);
1185 int size = get_type_size_bytes(get_CopyB_type(node));
1189 src_copy = be_new_Copy(block, new_src);
1190 dst_copy = be_new_Copy(block, new_dst);
1192 return new_bd_arm_CopyB(dbg, block, dst_copy, src_copy,
1193 new_bd_arm_EmptyReg(dbg, block),
1194 new_bd_arm_EmptyReg(dbg, block),
1195 new_bd_arm_EmptyReg(dbg, block),
1200 * Transform builtin clz.
1202 static ir_node *gen_clz(ir_node *node)
1204 ir_node *block = be_transform_node(get_nodes_block(node));
1205 dbg_info *dbg = get_irn_dbg_info(node);
1206 ir_node *op = get_irn_n(node, 1);
1207 ir_node *new_op = be_transform_node(op);
1209 /* TODO armv5 instruction, otherwise create a call */
1210 return new_bd_arm_Clz(dbg, block, new_op);
1214 * Transform Builtin node.
1216 static ir_node *gen_Builtin(ir_node *node)
1218 ir_builtin_kind kind = get_Builtin_kind(node);
1222 case ir_bk_debugbreak:
1223 case ir_bk_return_address:
1224 case ir_bk_frame_address:
1225 case ir_bk_prefetch:
1229 return gen_clz(node);
1232 case ir_bk_popcount:
1236 case ir_bk_inner_trampoline:
1239 panic("Builtin %s not implemented", get_builtin_kind_name(kind));
1243 * Transform Proj(Builtin) node.
1245 static ir_node *gen_Proj_Builtin(ir_node *proj)
1247 ir_node *node = get_Proj_pred(proj);
1248 ir_node *new_node = be_transform_node(node);
1249 ir_builtin_kind kind = get_Builtin_kind(node);
1252 case ir_bk_return_address:
1253 case ir_bk_frame_address:
1258 case ir_bk_popcount:
1260 assert(get_Proj_proj(proj) == pn_Builtin_max+1);
1263 case ir_bk_debugbreak:
1264 case ir_bk_prefetch:
1266 assert(get_Proj_proj(proj) == pn_Builtin_M);
1269 case ir_bk_inner_trampoline:
1272 panic("Builtin %s not implemented", get_builtin_kind_name(kind));
1275 static ir_node *gen_Proj_Load(ir_node *node)
1277 ir_node *load = get_Proj_pred(node);
1278 ir_node *new_load = be_transform_node(load);
1279 dbg_info *dbgi = get_irn_dbg_info(node);
1280 long proj = get_Proj_proj(node);
1282 /* renumber the proj */
1283 switch (get_arm_irn_opcode(new_load)) {
1285 /* handle all gp loads equal: they have the same proj numbers. */
1286 if (proj == pn_Load_res) {
1287 return new_rd_Proj(dbgi, new_load, mode_Iu, pn_arm_Ldr_res);
1288 } else if (proj == pn_Load_M) {
1289 return new_rd_Proj(dbgi, new_load, mode_M, pn_arm_Ldr_M);
1293 if (proj == pn_Load_res) {
1294 ir_mode *mode = get_Load_mode(load);
1295 return new_rd_Proj(dbgi, new_load, mode, pn_arm_Ldf_res);
1296 } else if (proj == pn_Load_M) {
1297 return new_rd_Proj(dbgi, new_load, mode_M, pn_arm_Ldf_M);
1303 panic("Unsupported Proj from Load");
1306 static ir_node *gen_Proj_CopyB(ir_node *node)
1308 ir_node *pred = get_Proj_pred(node);
1309 ir_node *new_pred = be_transform_node(pred);
1310 dbg_info *dbgi = get_irn_dbg_info(node);
1311 long proj = get_Proj_proj(node);
1315 if (is_arm_CopyB(new_pred)) {
1316 return new_rd_Proj(dbgi, new_pred, mode_M, pn_arm_CopyB_M);
1322 panic("Unsupported Proj from CopyB");
1325 static ir_node *gen_Proj_Div(ir_node *node)
1327 ir_node *pred = get_Proj_pred(node);
1328 ir_node *new_pred = be_transform_node(pred);
1329 dbg_info *dbgi = get_irn_dbg_info(node);
1330 ir_mode *mode = get_irn_mode(node);
1331 long proj = get_Proj_proj(node);
1335 return new_rd_Proj(dbgi, new_pred, mode_M, pn_arm_Dvf_M);
1337 return new_rd_Proj(dbgi, new_pred, mode, pn_arm_Dvf_res);
1341 panic("Unsupported Proj from Div");
1344 static ir_node *gen_Proj_Start(ir_node *node)
1346 ir_node *block = get_nodes_block(node);
1347 ir_node *new_block = be_transform_node(block);
1348 long proj = get_Proj_proj(node);
1350 switch ((pn_Start) proj) {
1351 case pn_Start_X_initial_exec:
1352 /* we exchange the ProjX with a jump */
1353 return new_bd_arm_Jmp(NULL, new_block);
1356 return be_prolog_get_memory(abihelper);
1358 case pn_Start_T_args:
1359 return new_r_Bad(get_irn_irg(block), mode_T);
1361 case pn_Start_P_frame_base:
1362 return be_prolog_get_reg_value(abihelper, sp_reg);
1364 panic("unexpected start proj: %ld\n", proj);
1367 static ir_node *gen_Proj_Proj_Start(ir_node *node)
1369 long pn = get_Proj_proj(node);
1370 ir_node *block = get_nodes_block(node);
1371 ir_node *new_block = be_transform_node(block);
1372 ir_graph *irg = get_Block_irg(new_block);
1373 ir_entity *entity = get_irg_entity(irg);
1374 ir_type *method_type = get_entity_type(entity);
1375 ir_type *param_type = get_method_param_type(method_type, pn);
1376 const reg_or_stackslot_t *param;
1378 /* Proj->Proj->Start must be a method argument */
1379 assert(get_Proj_proj(get_Proj_pred(node)) == pn_Start_T_args);
1381 param = &cconv->parameters[pn];
1383 if (param->reg0 != NULL) {
1384 /* argument transmitted in register */
1385 ir_mode *mode = get_type_mode(param_type);
1386 ir_node *value = be_prolog_get_reg_value(abihelper, param->reg0);
1388 if (mode_is_float(mode)) {
1389 ir_node *value1 = NULL;
1391 if (param->reg1 != NULL) {
1392 value1 = be_prolog_get_reg_value(abihelper, param->reg1);
1393 } else if (param->entity != NULL) {
1394 ir_node *const fp = get_irg_frame(irg);
1395 ir_node *const mem = be_prolog_get_memory(abihelper);
1396 ir_node *const ldr = new_bd_arm_Ldr(NULL, new_block, fp, mem, mode_gp, param->entity, 0, 0, true);
1397 value1 = new_r_Proj(ldr, mode_gp, pn_arm_Ldr_res);
1400 /* convert integer value to float */
1401 if (value1 == NULL) {
1402 value = int_to_float(NULL, new_block, value);
1404 value = ints_to_double(NULL, new_block, value, value1);
1409 /* argument transmitted on stack */
1410 ir_node *const fp = get_irg_frame(irg);
1411 ir_node *const mem = be_prolog_get_memory(abihelper);
1412 ir_mode *const mode = get_type_mode(param->type);
1416 if (mode_is_float(mode)) {
1417 load = new_bd_arm_Ldf(NULL, new_block, fp, mem, mode,
1418 param->entity, 0, 0, true);
1419 value = new_r_Proj(load, mode_fp, pn_arm_Ldf_res);
1421 load = new_bd_arm_Ldr(NULL, new_block, fp, mem, mode,
1422 param->entity, 0, 0, true);
1423 value = new_r_Proj(load, mode_gp, pn_arm_Ldr_res);
1425 set_irn_pinned(load, op_pin_state_floats);
1432 * Finds number of output value of a mode_T node which is constrained to
1433 * a single specific register.
1435 static int find_out_for_reg(ir_node *node, const arch_register_t *reg)
1437 be_foreach_out(node, o) {
1438 const arch_register_req_t *req = arch_get_irn_register_req_out(node, o);
1439 if (req == reg->single_req)
1445 static ir_node *gen_Proj_Proj_Call(ir_node *node)
1447 long pn = get_Proj_proj(node);
1448 ir_node *call = get_Proj_pred(get_Proj_pred(node));
1449 ir_node *new_call = be_transform_node(call);
1450 ir_type *function_type = get_Call_type(call);
1451 calling_convention_t *cconv
1452 = arm_decide_calling_convention(NULL, function_type);
1453 const reg_or_stackslot_t *res = &cconv->results[pn];
1457 /* TODO 64bit modes */
1458 assert(res->reg0 != NULL && res->reg1 == NULL);
1459 regn = find_out_for_reg(new_call, res->reg0);
1461 panic("Internal error in calling convention for return %+F", node);
1463 mode = res->reg0->reg_class->mode;
1465 arm_free_calling_convention(cconv);
1467 return new_r_Proj(new_call, mode, regn);
1470 static ir_node *gen_Proj_Call(ir_node *node)
1472 long pn = get_Proj_proj(node);
1473 ir_node *call = get_Proj_pred(node);
1474 ir_node *new_call = be_transform_node(call);
1476 switch ((pn_Call) pn) {
1478 return new_r_Proj(new_call, mode_M, 0);
1479 case pn_Call_X_regular:
1480 case pn_Call_X_except:
1481 case pn_Call_T_result:
1484 panic("Unexpected Call proj %ld\n", pn);
1488 * Transform a Proj node.
1490 static ir_node *gen_Proj(ir_node *node)
1492 ir_node *pred = get_Proj_pred(node);
1493 long proj = get_Proj_proj(node);
1495 switch (get_irn_opcode(pred)) {
1497 if (proj == pn_Store_M) {
1498 return be_transform_node(pred);
1500 panic("Unsupported Proj from Store");
1503 return gen_Proj_Load(node);
1505 return gen_Proj_Call(node);
1507 return gen_Proj_CopyB(node);
1509 return gen_Proj_Div(node);
1511 return gen_Proj_Start(node);
1515 return be_duplicate_node(node);
1517 ir_node *pred_pred = get_Proj_pred(pred);
1518 if (is_Call(pred_pred)) {
1519 return gen_Proj_Proj_Call(node);
1520 } else if (is_Start(pred_pred)) {
1521 return gen_Proj_Proj_Start(node);
1526 return gen_Proj_Builtin(node);
1528 panic("code selection didn't expect Proj after %+F\n", pred);
1532 static ir_node *gen_Unknown(ir_node *node)
1534 ir_node *block = get_nodes_block(node);
1535 ir_node *new_block = be_transform_node(block);
1536 dbg_info *dbgi = get_irn_dbg_info(node);
1538 /* just produce a 0 */
1539 ir_mode *mode = get_irn_mode(node);
1540 if (mode_is_float(mode)) {
1541 ir_tarval *tv = get_mode_null(mode);
1542 ir_node *fconst = new_bd_arm_fConst(dbgi, new_block, tv);
1544 } else if (mode_needs_gp_reg(mode)) {
1545 return create_const_graph_value(dbgi, new_block, 0);
1548 panic("Unexpected Unknown mode");
1552 * Produces the type which sits between the stack args and the locals on the
1553 * stack. It will contain the return address and space to store the old base
1555 * @return The Firm type modeling the ABI between type.
1557 static ir_type *arm_get_between_type(void)
1559 static ir_type *between_type = NULL;
1561 if (between_type == NULL) {
1562 between_type = new_type_class(new_id_from_str("arm_between_type"));
1563 set_type_size_bytes(between_type, 0);
1566 return between_type;
1569 static void create_stacklayout(ir_graph *irg)
1571 ir_entity *entity = get_irg_entity(irg);
1572 ir_type *function_type = get_entity_type(entity);
1573 be_stack_layout_t *layout = be_get_irg_stack_layout(irg);
1578 /* calling conventions must be decided by now */
1579 assert(cconv != NULL);
1581 /* construct argument type */
1582 arg_type = new_type_struct(id_mangle_u(get_entity_ident(entity), new_id_from_chars("arg_type", 8)));
1583 n_params = get_method_n_params(function_type);
1584 for (p = 0; p < n_params; ++p) {
1585 reg_or_stackslot_t *param = &cconv->parameters[p];
1589 if (param->type == NULL)
1592 snprintf(buf, sizeof(buf), "param_%d", p);
1593 id = new_id_from_str(buf);
1594 param->entity = new_entity(arg_type, id, param->type);
1595 set_entity_offset(param->entity, param->offset);
1598 /* TODO: what about external functions? we don't know most of the stack
1599 * layout for them. And probably don't need all of this... */
1600 memset(layout, 0, sizeof(*layout));
1602 layout->frame_type = get_irg_frame_type(irg);
1603 layout->between_type = arm_get_between_type();
1604 layout->arg_type = arg_type;
1605 layout->initial_offset = 0;
1606 layout->initial_bias = 0;
1607 layout->sp_relative = true;
1609 assert(N_FRAME_TYPES == 3);
1610 layout->order[0] = layout->frame_type;
1611 layout->order[1] = layout->between_type;
1612 layout->order[2] = layout->arg_type;
1616 * transform the start node to the prolog code
1618 static ir_node *gen_Start(ir_node *node)
1620 ir_graph *irg = get_irn_irg(node);
1621 ir_entity *entity = get_irg_entity(irg);
1622 ir_type *function_type = get_entity_type(entity);
1623 ir_node *block = get_nodes_block(node);
1624 ir_node *new_block = be_transform_node(block);
1625 dbg_info *dbgi = get_irn_dbg_info(node);
1629 /* stackpointer is important at function prolog */
1630 be_prolog_add_reg(abihelper, sp_reg,
1631 arch_register_req_type_produces_sp | arch_register_req_type_ignore);
1632 /* function parameters in registers */
1633 for (i = 0; i < get_method_n_params(function_type); ++i) {
1634 const reg_or_stackslot_t *param = &cconv->parameters[i];
1635 if (param->reg0 != NULL)
1636 be_prolog_add_reg(abihelper, param->reg0, arch_register_req_type_none);
1637 if (param->reg1 != NULL)
1638 be_prolog_add_reg(abihelper, param->reg1, arch_register_req_type_none);
1640 /* announce that we need the values of the callee save regs */
1641 for (i = 0; i != ARRAY_SIZE(callee_saves); ++i) {
1642 be_prolog_add_reg(abihelper, callee_saves[i], arch_register_req_type_none);
1645 start = be_prolog_create_start(abihelper, dbgi, new_block);
1649 static ir_node *get_stack_pointer_for(ir_node *node)
1651 /* get predecessor in stack_order list */
1652 ir_node *stack_pred = be_get_stack_pred(stackorder, node);
1655 if (stack_pred == NULL) {
1656 /* first stack user in the current block. We can simply use the
1657 * initial sp_proj for it */
1658 ir_node *sp_proj = be_prolog_get_reg_value(abihelper, sp_reg);
1662 be_transform_node(stack_pred);
1663 stack = pmap_get(ir_node, node_to_stack, stack_pred);
1664 if (stack == NULL) {
1665 return get_stack_pointer_for(stack_pred);
1672 * transform a Return node into epilogue code + return statement
1674 static ir_node *gen_Return(ir_node *node)
1676 ir_node *block = get_nodes_block(node);
1677 ir_node *new_block = be_transform_node(block);
1678 dbg_info *dbgi = get_irn_dbg_info(node);
1679 ir_node *mem = get_Return_mem(node);
1680 ir_node *new_mem = be_transform_node(mem);
1681 size_t n_callee_saves = ARRAY_SIZE(callee_saves);
1682 ir_node *sp_proj = get_stack_pointer_for(node);
1683 size_t n_res = get_Return_n_ress(node);
1687 be_epilog_begin(abihelper);
1688 be_epilog_set_memory(abihelper, new_mem);
1689 /* connect stack pointer with initial stack pointer. fix_stack phase
1690 will later serialize all stack pointer adjusting nodes */
1691 be_epilog_add_reg(abihelper, sp_reg,
1692 arch_register_req_type_produces_sp | arch_register_req_type_ignore,
1696 for (i = 0; i < n_res; ++i) {
1697 ir_node *res_value = get_Return_res(node, i);
1698 ir_node *new_res_value = be_transform_node(res_value);
1699 const reg_or_stackslot_t *slot = &cconv->results[i];
1700 const arch_register_t *reg = slot->reg0;
1701 assert(slot->reg1 == NULL);
1702 be_epilog_add_reg(abihelper, reg, arch_register_req_type_none, new_res_value);
1705 /* connect callee saves with their values at the function begin */
1706 for (i = 0; i < n_callee_saves; ++i) {
1707 const arch_register_t *reg = callee_saves[i];
1708 ir_node *value = be_prolog_get_reg_value(abihelper, reg);
1709 be_epilog_add_reg(abihelper, reg, arch_register_req_type_none, value);
1712 /* epilog code: an incsp */
1713 bereturn = be_epilog_create_return(abihelper, dbgi, new_block);
1718 static ir_node *gen_Call(ir_node *node)
1720 ir_graph *irg = get_irn_irg(node);
1721 ir_node *callee = get_Call_ptr(node);
1722 ir_node *block = get_nodes_block(node);
1723 ir_node *new_block = be_transform_node(block);
1724 ir_node *mem = get_Call_mem(node);
1725 ir_node *new_mem = be_transform_node(mem);
1726 dbg_info *dbgi = get_irn_dbg_info(node);
1727 ir_type *type = get_Call_type(node);
1728 calling_convention_t *cconv = arm_decide_calling_convention(NULL, type);
1729 size_t n_params = get_Call_n_params(node);
1730 size_t const n_param_regs = cconv->n_reg_params;
1731 /* max inputs: memory, callee, register arguments */
1732 size_t const max_inputs = 2 + n_param_regs;
1733 ir_node **in = ALLOCAN(ir_node*, max_inputs);
1734 ir_node **sync_ins = ALLOCAN(ir_node*, max_inputs);
1735 struct obstack *obst = be_get_be_obst(irg);
1736 const arch_register_req_t **in_req
1737 = OALLOCNZ(obst, const arch_register_req_t*, max_inputs);
1738 size_t in_arity = 0;
1739 size_t sync_arity = 0;
1740 size_t const n_caller_saves = ARRAY_SIZE(caller_saves);
1741 ir_entity *entity = NULL;
1742 ir_node *incsp = NULL;
1749 assert(n_params == get_method_n_params(type));
1751 /* construct arguments */
1754 in_req[in_arity] = arch_no_register_req;
1758 for (p = 0; p < n_params; ++p) {
1759 ir_node *value = get_Call_param(node, p);
1760 ir_node *new_value = be_transform_node(value);
1761 ir_node *new_value1 = NULL;
1762 const reg_or_stackslot_t *param = &cconv->parameters[p];
1763 ir_type *param_type = get_method_param_type(type, p);
1764 ir_mode *mode = get_type_mode(param_type);
1767 if (mode_is_float(mode) && param->reg0 != NULL) {
1768 unsigned size_bits = get_mode_size_bits(mode);
1769 if (size_bits == 64) {
1770 double_to_ints(dbgi, new_block, new_value, &new_value,
1773 assert(size_bits == 32);
1774 new_value = float_to_int(dbgi, new_block, new_value);
1778 /* put value into registers */
1779 if (param->reg0 != NULL) {
1780 in[in_arity] = new_value;
1781 in_req[in_arity] = param->reg0->single_req;
1783 if (new_value1 == NULL)
1786 if (param->reg1 != NULL) {
1787 assert(new_value1 != NULL);
1788 in[in_arity] = new_value1;
1789 in_req[in_arity] = param->reg1->single_req;
1794 /* we need a store if we're here */
1795 if (new_value1 != NULL) {
1796 new_value = new_value1;
1800 /* create a parameter frame if necessary */
1801 if (incsp == NULL) {
1802 ir_node *new_frame = get_stack_pointer_for(node);
1803 incsp = be_new_IncSP(sp_reg, new_block, new_frame,
1804 cconv->param_stack_size, 1);
1806 if (mode_is_float(mode)) {
1807 str = new_bd_arm_Stf(dbgi, new_block, incsp, new_value, new_mem,
1808 mode, NULL, 0, param->offset, true);
1810 str = new_bd_arm_Str(dbgi, new_block, incsp, new_value, new_mem,
1811 mode, NULL, 0, param->offset, true);
1813 sync_ins[sync_arity++] = str;
1815 assert(in_arity <= max_inputs);
1817 /* construct memory input */
1818 if (sync_arity == 0) {
1819 in[mem_pos] = new_mem;
1820 } else if (sync_arity == 1) {
1821 in[mem_pos] = sync_ins[0];
1823 in[mem_pos] = new_rd_Sync(NULL, new_block, sync_arity, sync_ins);
1826 /* TODO: use a generic symconst matcher here */
1827 if (is_SymConst(callee)) {
1828 entity = get_SymConst_entity(callee);
1830 /* TODO: finish load matcher here */
1831 in[in_arity] = be_transform_node(callee);
1832 in_req[in_arity] = arm_reg_classes[CLASS_arm_gp].class_req;
1840 out_arity = 1 + n_caller_saves;
1842 if (entity != NULL) {
1843 /* TODO: use a generic symconst matcher here
1844 * so we can also handle entity+offset, etc. */
1845 res = new_bd_arm_Bl(dbgi, new_block, in_arity, in, out_arity,entity, 0);
1848 * - use a proper shifter_operand matcher
1849 * - we could also use LinkLdrPC
1851 res = new_bd_arm_LinkMovPC(dbgi, new_block, in_arity, in, out_arity,
1855 if (incsp != NULL) {
1856 /* IncSP to destroy the call stackframe */
1857 incsp = be_new_IncSP(sp_reg, new_block, incsp, -cconv->param_stack_size,
1859 /* if we are the last IncSP producer in a block then we have to keep
1861 * Note: This here keeps all producers which is more than necessary */
1862 add_irn_dep(incsp, res);
1865 pmap_insert(node_to_stack, node, incsp);
1868 arch_set_irn_register_reqs_in(res, in_req);
1870 /* create output register reqs */
1871 arch_set_irn_register_req_out(res, 0, arch_no_register_req);
1872 for (o = 0; o < n_caller_saves; ++o) {
1873 const arch_register_t *reg = caller_saves[o];
1874 arch_set_irn_register_req_out(res, o+1, reg->single_req);
1877 /* copy pinned attribute */
1878 set_irn_pinned(res, get_irn_pinned(node));
1880 arm_free_calling_convention(cconv);
1884 static ir_node *gen_Sel(ir_node *node)
1886 dbg_info *dbgi = get_irn_dbg_info(node);
1887 ir_node *block = get_nodes_block(node);
1888 ir_node *new_block = be_transform_node(block);
1889 ir_node *ptr = get_Sel_ptr(node);
1890 ir_node *new_ptr = be_transform_node(ptr);
1891 ir_entity *entity = get_Sel_entity(node);
1893 /* must be the frame pointer all other sels must have been lowered
1895 assert(is_Proj(ptr) && is_Start(get_Proj_pred(ptr)));
1897 return new_bd_arm_FrameAddr(dbgi, new_block, new_ptr, entity, 0);
1900 static ir_node *gen_Phi(ir_node *node)
1902 ir_mode *mode = get_irn_mode(node);
1903 const arch_register_req_t *req;
1904 if (mode_needs_gp_reg(mode)) {
1905 /* we shouldn't have any 64bit stuff around anymore */
1906 assert(get_mode_size_bits(mode) <= 32);
1907 /* all integer operations are on 32bit registers now */
1909 req = arm_reg_classes[CLASS_arm_gp].class_req;
1911 req = arch_no_register_req;
1914 return be_transform_phi(node, req);
1918 * Enters all transform functions into the generic pointer
1920 static void arm_register_transformers(void)
1922 be_start_transform_setup();
1924 be_set_transform_function(op_Add, gen_Add);
1925 be_set_transform_function(op_And, gen_And);
1926 be_set_transform_function(op_Call, gen_Call);
1927 be_set_transform_function(op_Cmp, gen_Cmp);
1928 be_set_transform_function(op_Cond, gen_Cond);
1929 be_set_transform_function(op_Const, gen_Const);
1930 be_set_transform_function(op_Conv, gen_Conv);
1931 be_set_transform_function(op_CopyB, gen_CopyB);
1932 be_set_transform_function(op_Div, gen_Div);
1933 be_set_transform_function(op_Eor, gen_Eor);
1934 be_set_transform_function(op_Jmp, gen_Jmp);
1935 be_set_transform_function(op_Load, gen_Load);
1936 be_set_transform_function(op_Minus, gen_Minus);
1937 be_set_transform_function(op_Mul, gen_Mul);
1938 be_set_transform_function(op_Not, gen_Not);
1939 be_set_transform_function(op_Or, gen_Or);
1940 be_set_transform_function(op_Phi, gen_Phi);
1941 be_set_transform_function(op_Proj, gen_Proj);
1942 be_set_transform_function(op_Return, gen_Return);
1943 be_set_transform_function(op_Rotl, gen_Rotl);
1944 be_set_transform_function(op_Sel, gen_Sel);
1945 be_set_transform_function(op_Shl, gen_Shl);
1946 be_set_transform_function(op_Shr, gen_Shr);
1947 be_set_transform_function(op_Shrs, gen_Shrs);
1948 be_set_transform_function(op_Start, gen_Start);
1949 be_set_transform_function(op_Store, gen_Store);
1950 be_set_transform_function(op_Sub, gen_Sub);
1951 be_set_transform_function(op_Switch, gen_Switch);
1952 be_set_transform_function(op_SymConst, gen_SymConst);
1953 be_set_transform_function(op_Unknown, gen_Unknown);
1954 be_set_transform_function(op_Builtin, gen_Builtin);
1958 * Initialize fpa Immediate support.
1960 static void arm_init_fpa_immediate(void)
1962 /* 0, 1, 2, 3, 4, 5, 10, or 0.5. */
1963 fpa_imm[FPA_IMM_FLOAT][fpa_null] = get_mode_null(mode_F);
1964 fpa_imm[FPA_IMM_FLOAT][fpa_one] = get_mode_one(mode_F);
1965 fpa_imm[FPA_IMM_FLOAT][fpa_two] = new_tarval_from_str("2", 1, mode_F);
1966 fpa_imm[FPA_IMM_FLOAT][fpa_three] = new_tarval_from_str("3", 1, mode_F);
1967 fpa_imm[FPA_IMM_FLOAT][fpa_four] = new_tarval_from_str("4", 1, mode_F);
1968 fpa_imm[FPA_IMM_FLOAT][fpa_five] = new_tarval_from_str("5", 1, mode_F);
1969 fpa_imm[FPA_IMM_FLOAT][fpa_ten] = new_tarval_from_str("10", 2, mode_F);
1970 fpa_imm[FPA_IMM_FLOAT][fpa_half] = new_tarval_from_str("0.5", 3, mode_F);
1972 fpa_imm[FPA_IMM_DOUBLE][fpa_null] = get_mode_null(mode_D);
1973 fpa_imm[FPA_IMM_DOUBLE][fpa_one] = get_mode_one(mode_D);
1974 fpa_imm[FPA_IMM_DOUBLE][fpa_two] = new_tarval_from_str("2", 1, mode_D);
1975 fpa_imm[FPA_IMM_DOUBLE][fpa_three] = new_tarval_from_str("3", 1, mode_D);
1976 fpa_imm[FPA_IMM_DOUBLE][fpa_four] = new_tarval_from_str("4", 1, mode_D);
1977 fpa_imm[FPA_IMM_DOUBLE][fpa_five] = new_tarval_from_str("5", 1, mode_D);
1978 fpa_imm[FPA_IMM_DOUBLE][fpa_ten] = new_tarval_from_str("10", 2, mode_D);
1979 fpa_imm[FPA_IMM_DOUBLE][fpa_half] = new_tarval_from_str("0.5", 3, mode_D);
1983 * Transform a Firm graph into an ARM graph.
1985 void arm_transform_graph(ir_graph *irg)
1987 static int imm_initialized = 0;
1988 ir_entity *entity = get_irg_entity(irg);
1989 const arch_env_t *arch_env = be_get_irg_arch_env(irg);
1990 ir_type *frame_type;
1995 if (! imm_initialized) {
1996 arm_init_fpa_immediate();
1997 imm_initialized = 1;
1999 arm_register_transformers();
2001 isa = (arm_isa_t*) arch_env;
2003 node_to_stack = pmap_create();
2005 assert(abihelper == NULL);
2006 abihelper = be_abihelper_prepare(irg);
2007 stackorder = be_collect_stacknodes(irg);
2008 assert(cconv == NULL);
2009 cconv = arm_decide_calling_convention(irg, get_entity_type(entity));
2010 create_stacklayout(irg);
2012 be_transform_graph(irg, NULL);
2014 be_abihelper_finish(abihelper);
2016 be_free_stackorder(stackorder);
2019 arm_free_calling_convention(cconv);
2022 frame_type = get_irg_frame_type(irg);
2023 if (get_type_state(frame_type) == layout_undefined) {
2024 default_layout_compound_type(frame_type);
2027 pmap_destroy(node_to_stack);
2028 node_to_stack = NULL;
2030 be_add_missing_keeps(irg);
2033 void arm_init_transform(void)
2035 FIRM_DBG_REGISTER(dbg, "firm.be.arm.transform");