X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbenode.c;h=521fdcbb8d47d7407481da65ac1651928cf2c130;hb=4d7a9507baf1737297cd4f7fc91eab209fd5d398;hp=57cefb8d9bce3478e3340b8cef24a47557c5d8af;hpb=5f838fb985ea51236990ec8a17693a3052abb936;p=libfirm

diff --git a/ir/be/benode.c b/ir/be/benode.c
index 57cefb8d9..521fdcbb8 100644
--- a/ir/be/benode.c
+++ b/ir/be/benode.c
@@ -5,6 +5,8 @@
  *
  * Backend node support.
  *
+ * This file provdies Perm, Copy, Spill and Reload nodes.
+ *
  * Copyright (C) 2005 Universitaet Karlsruhe
  * Released under the GPL
  */
@@ -20,12 +22,15 @@
 #include "pmap.h"
 #include "util.h"
 #include "debug.h"
+#include "fourcc.h"
+#include "bitfiddle.h"
 
 #include "irop_t.h"
 #include "irmode_t.h"
 #include "irnode_t.h"
 #include "ircons_t.h"
 #include "irprintf.h"
+#include "irgwalk.h"
 
 #include "be_t.h"
 #include "belive_t.h"
@@ -34,521 +39,1190 @@
 
 #include "beirgmod.h"
 
-#define DBG_LEVEL 0
+#define OUT_POS(x) (-((x) + 1))
+
+/* Sometimes we want to put const nodes into get_irn_generic_attr ... */
+#define get_irn_attr(irn) get_irn_generic_attr((ir_node *) (irn))
+
+static unsigned be_node_tag = FOURCC('B', 'E', 'N', 'O');
 
+#if 0
 typedef enum _node_kind_t {
-  node_kind_spill,
-  node_kind_reload,
-  node_kind_perm,
-  node_kind_copy,
-  node_kind_last
+	node_kind_spill,
+	node_kind_reload,
+	node_kind_perm,
+	node_kind_copy,
+	node_kind_kill,
+	node_kind_last
 } node_kind_t;
+#endif
+
+typedef enum {
+	be_req_kind_old_limited,
+	be_req_kind_negate_old_limited,
+	be_req_kind_single_reg
+} be_req_kind_t;
 
 typedef struct {
-  node_kind_t kind;
-  const arch_register_class_t *cls;
-  ir_op *op;
-  int n_pos;
-  int *pos;
-} be_op_t;
+	arch_register_req_t req;
+	be_req_kind_t       kind;
+	arch_irn_flags_t    flags;
+	union {
+		struct {
+			void (*old_limited)(void *ptr, bitset_t *bs);
+			void *old_limited_env;
+		} old_limited;
+
+		const arch_register_t *single_reg;
+	} x;
+} be_req_t;
 
 typedef struct {
-	const be_node_factory_t *factory;
-	int n_regs;
-	const arch_register_t *reg[1];
+	const arch_register_t *reg;
+	be_req_t              req;
+	be_req_t              in_req;
+} be_reg_data_t;
+
+typedef struct {
+	int                         max_reg_data;
+	be_reg_data_t               *reg_data;
 } be_node_attr_t;
 
 typedef struct {
-	be_node_attr_t attr;
-	ir_node *spill_ctx;
+	be_node_attr_t node_attr;
+	int offset;           /**< The offset by which the stack shall be increased/decreased. */
+	be_stack_dir_t dir;   /**< The direction in which the stack shall be modified (along or in the other direction). */
+} be_stack_attr_t;
+
+typedef struct {
+	be_node_attr_t node_attr;
+	entity *ent;
+	int offset;
+} be_frame_attr_t;
+
+typedef struct {
+	be_node_attr_t node_attr;
+	entity *ent;
+} be_call_attr_t;
+
+typedef struct {
+	be_frame_attr_t frame_attr;
+	ir_node *spill_ctx;  /**< The node in whose context this spill was introduced. */
 } be_spill_attr_t;
 
-static int templ_pos_Spill[] = {
-	0
-};
+ir_op *op_be_Spill;
+ir_op *op_be_Reload;
+ir_op *op_be_Perm;
+ir_op *op_be_Copy;
+ir_op *op_be_Keep;
+ir_op *op_be_CopyKeep;
+ir_op *op_be_Call;
+ir_op *op_be_Return;
+ir_op *op_be_IncSP;
+ir_op *op_be_AddSP;
+ir_op *op_be_SetSP;
+ir_op *op_be_RegParams;
+ir_op *op_be_StackParam;
+ir_op *op_be_FrameAddr;
+ir_op *op_be_FrameLoad;
+ir_op *op_be_FrameStore;
+ir_op *op_be_Epilogue;
+
+static int beo_base = -1;
+
+static const ir_op_ops be_node_op_ops;
+
+#define N   irop_flag_none
+#define L   irop_flag_labeled
+#define C   irop_flag_commutative
+#define X   irop_flag_cfopcode
+#define I   irop_flag_ip_cfopcode
+#define F   irop_flag_fragile
+#define Y   irop_flag_forking
+#define H   irop_flag_highlevel
+#define c   irop_flag_constlike
+#define K   irop_flag_keep
+
+void be_node_init(void) {
+	static int inited = 0;
+
+	if(inited)
+		return;
 
-static int templ_pos_Reload[] = {
-	-1
-};
+	inited = 1;
+
+	/* Acquire all needed opcodes. */
+	beo_base = get_next_ir_opcodes(beo_Last - 1);
+
+	op_be_Spill      = new_ir_op(beo_base + beo_Spill,      "Spill",      op_pin_state_mem_pinned, N, oparity_unary,    0, sizeof(be_spill_attr_t), &be_node_op_ops);
+	op_be_Reload     = new_ir_op(beo_base + beo_Reload,     "Reload",     op_pin_state_mem_pinned, N, oparity_zero,     0, sizeof(be_frame_attr_t), &be_node_op_ops);
+	op_be_Perm       = new_ir_op(beo_base + beo_Perm,       "Perm",       op_pin_state_pinned,     N, oparity_variable, 0, sizeof(be_node_attr_t),  &be_node_op_ops);
+	op_be_Copy       = new_ir_op(beo_base + beo_Copy,       "Copy",       op_pin_state_floats,     N, oparity_unary,    0, sizeof(be_node_attr_t),  &be_node_op_ops);
+	op_be_Keep       = new_ir_op(beo_base + beo_Keep,       "Keep",       op_pin_state_pinned,     K, oparity_variable, 0, sizeof(be_node_attr_t),  &be_node_op_ops);
+	op_be_CopyKeep   = new_ir_op(beo_base + beo_CopyKeep,   "CopyKeep",   op_pin_state_pinned,     K, oparity_variable, 0, sizeof(be_node_attr_t),  &be_node_op_ops);
+	op_be_Call       = new_ir_op(beo_base + beo_Call,       "Call",       op_pin_state_pinned,     N, oparity_variable, 0, sizeof(be_call_attr_t),  &be_node_op_ops);
+	op_be_Return     = new_ir_op(beo_base + beo_Return,     "Return",     op_pin_state_pinned,     X, oparity_variable, 0, sizeof(be_node_attr_t),  &be_node_op_ops);
+	op_be_AddSP      = new_ir_op(beo_base + beo_AddSP,      "AddSP",      op_pin_state_pinned,     N, oparity_unary,    0, sizeof(be_node_attr_t),  &be_node_op_ops);
+	op_be_SetSP      = new_ir_op(beo_base + beo_SetSP,      "SetSP",      op_pin_state_pinned,     N, oparity_binary,   0, sizeof(be_stack_attr_t), &be_node_op_ops);
+	op_be_IncSP      = new_ir_op(beo_base + beo_IncSP,      "IncSP",      op_pin_state_pinned,     N, oparity_binary,   0, sizeof(be_stack_attr_t), &be_node_op_ops);
+	op_be_RegParams  = new_ir_op(beo_base + beo_RegParams,  "RegParams",  op_pin_state_pinned,     N, oparity_zero,     0, sizeof(be_node_attr_t),  &be_node_op_ops);
+	op_be_StackParam = new_ir_op(beo_base + beo_StackParam, "StackParam", op_pin_state_pinned,     N, oparity_unary,    0, sizeof(be_frame_attr_t), &be_node_op_ops);
+	op_be_FrameAddr  = new_ir_op(beo_base + beo_FrameAddr,  "FrameAddr",  op_pin_state_pinned,     N, oparity_binary,   0, sizeof(be_frame_attr_t), &be_node_op_ops);
+	op_be_FrameLoad  = new_ir_op(beo_base + beo_FrameLoad,  "FrameLoad",  op_pin_state_pinned,     N, oparity_any,      0, sizeof(be_frame_attr_t), &be_node_op_ops);
+	op_be_FrameStore = new_ir_op(beo_base + beo_FrameStore, "FrameStore", op_pin_state_pinned,     N, oparity_any,      0, sizeof(be_frame_attr_t), &be_node_op_ops);
+	op_be_Epilogue   = new_ir_op(beo_base + beo_Epilogue,   "Epilogue",   op_pin_state_pinned,     N, oparity_any,      0, sizeof(be_node_attr_t),  &be_node_op_ops);
+
+	set_op_tag(op_be_Spill,      &be_node_tag);
+	set_op_tag(op_be_Reload,     &be_node_tag);
+	set_op_tag(op_be_Perm,       &be_node_tag);
+	set_op_tag(op_be_Copy,       &be_node_tag);
+	set_op_tag(op_be_Keep,       &be_node_tag);
+	set_op_tag(op_be_CopyKeep,   &be_node_tag);
+	set_op_tag(op_be_Call,       &be_node_tag);
+	set_op_tag(op_be_Return,     &be_node_tag);
+	set_op_tag(op_be_AddSP,      &be_node_tag);
+	set_op_tag(op_be_SetSP,      &be_node_tag);
+	set_op_tag(op_be_IncSP,      &be_node_tag);
+	set_op_tag(op_be_RegParams,  &be_node_tag);
+	set_op_tag(op_be_StackParam, &be_node_tag);
+	set_op_tag(op_be_FrameLoad,  &be_node_tag);
+	set_op_tag(op_be_FrameStore, &be_node_tag);
+	set_op_tag(op_be_FrameAddr,  &be_node_tag);
+	set_op_tag(op_be_Epilogue,   &be_node_tag);
+}
 
-static int templ_pos_Copy[] = {
-	0, -1
-};
+static void *init_node_attr(ir_node* irn, int max_reg_data)
+{
+	ir_graph *irg     = get_irn_irg(irn);
+	be_node_attr_t *a = get_irn_attr(irn);
 
-static int dump_node(ir_node *irn, FILE *f, dump_reason_t reason);
+	memset(a, 0, sizeof(get_op_attr_size(get_irn_op(irn))));
+	a->max_reg_data = max_reg_data;
+	a->reg_data     = NULL;
 
-static const ir_op_ops be_node_ops = {
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-	dump_node,
-	NULL
-};
+	if(max_reg_data > 0) {
+		int i;
 
-static be_node_attr_t *init_node_attr(ir_node *irn,
-		const be_node_factory_t *fact, int n_regs)
+		a->reg_data = NEW_ARR_D(be_reg_data_t, get_irg_obstack(irg), max_reg_data);
+		memset(a->reg_data, 0, max_reg_data * sizeof(a->reg_data[0]));
+		for(i = 0; i < max_reg_data; ++i) {
+			a->reg_data[i].req.req.cls  = NULL;
+			a->reg_data[i].req.req.type = arch_register_req_type_none;
+		}
+	}
+
+	return a;
+}
+
+static INLINE int is_be_node(const ir_node *irn)
+{
+	return get_op_tag(get_irn_op(irn)) == &be_node_tag;
+}
+
+be_opcode_t be_get_irn_opcode(const ir_node *irn)
+{
+	return is_be_node(irn) ? get_irn_opcode(irn) - beo_base : beo_NoBeOp;
+}
+
+static int redir_proj(const ir_node **node, int pos)
+{
+	const ir_node *n = *node;
+
+	if(is_Proj(n)) {
+		ir_node *irn;
+
+		assert(pos == -1 && "Illegal pos for a Proj");
+		*node = irn = get_Proj_pred(n);
+		if(is_Proj(irn)) {
+			assert(get_irn_mode(irn) == mode_T);
+			*node = get_Proj_pred(irn);
+		}
+		return get_Proj_proj(n);
+	}
+
+	return 0;
+}
+
+static void
+be_node_set_irn_reg(const void *_self, ir_node *irn, const arch_register_t *reg)
+{
+	int out_pos;
+	be_node_attr_t *a;
+
+	out_pos = redir_proj((const ir_node **) &irn, -1);
+	a       = get_irn_attr(irn);
+
+	assert(is_be_node(irn));
+	assert(out_pos < a->max_reg_data && "position too high");
+	a->reg_data[out_pos].reg = reg;
+}
+
+
+ir_node *be_new_Spill(const arch_register_class_t *cls, const arch_register_class_t *cls_frame, ir_graph *irg, ir_node *bl, ir_node *frame, ir_node *to_spill, ir_node *ctx)
+{
+	be_spill_attr_t *a;
+	ir_node *in[2];
+	ir_node *res;
+
+	in[0] = frame;
+	in[1] = to_spill;
+	res   = new_ir_node(NULL, irg, bl, op_be_Spill, mode_M, 2, in);
+	a     = init_node_attr(res, 2);
+	a->frame_attr.ent = NULL;
+	a->frame_attr.offset = 0;
+	a->spill_ctx = ctx;
+
+	be_node_set_reg_class(res, 0, cls_frame);
+	be_node_set_reg_class(res, 1, cls);
+	return res;
+}
+
+ir_node *be_new_Reload(const arch_register_class_t *cls, const arch_register_class_t *cls_frame, ir_graph *irg, ir_node *bl, ir_node *frame, ir_node *mem, ir_mode *mode)
+{
+	ir_node *in[2];
+	ir_node *res;
+
+	in[0] = frame;
+	in[1] = mem;
+	res   = new_ir_node(NULL, irg, bl, op_be_Reload, mode, 2, in);
+	init_node_attr(res, 2);
+	be_node_set_reg_class(res, 0, cls_frame);
+	be_node_set_reg_class(res, -1, cls);
+	return res;
+}
+
+ir_node *(be_get_Reload_mem)(const ir_node *irn)
+{
+	assert(be_is_Reload(irn));
+	return get_irn_n(irn, be_pos_Reload_mem);
+}
+
+ir_node *be_new_Perm(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, int n, ir_node *in[])
 {
-	be_node_attr_t *attr = (be_node_attr_t *) &irn->attr;
 	int i;
+	ir_node *irn = new_ir_node(NULL, irg, bl, op_be_Perm, mode_T, n, in);
+	init_node_attr(irn, n);
+	for(i = 0; i < n; ++i) {
+		be_node_set_reg_class(irn, i, cls);
+		be_node_set_reg_class(irn, OUT_POS(i), cls);
+	}
 
-	attr->n_regs  = n_regs;
-	attr->factory = fact;
+	return irn;
+}
+
+ir_node *be_new_Copy(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, ir_node *op)
+{
+	ir_node *in[1];
+	ir_node *res;
+
+	in[0] = op;
+	res   = new_ir_node(NULL, irg, bl, op_be_Copy, get_irn_mode(op), 1, in);
+	init_node_attr(res, 1);
+	be_node_set_reg_class(res, 0, cls);
+	be_node_set_reg_class(res, OUT_POS(0), cls);
+	return res;
+}
 
-	for(i = 0; i < n_regs; ++i)
-		attr->reg[i] = NULL;
+ir_node *be_new_Keep(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, int n, ir_node *in[])
+{
+	int i;
+	ir_node *irn;
 
-	return attr;
+	irn = new_ir_node(NULL, irg, bl, op_be_Keep, mode_ANY, n, in);
+	init_node_attr(irn, n);
+	for(i = 0; i < n; ++i) {
+		be_node_set_reg_class(irn, i, cls);
+	}
+	keep_alive(irn);
+	return irn;
 }
 
-#define ARRSIZE(x) (sizeof(x) / sizeof(x[0]))
+ir_node *be_new_Call(ir_graph *irg, ir_node *bl, ir_node *mem, ir_node *sp, ir_node *ptr, int n_outs, int n, ir_node *in[])
+{
+	int real_n = 3 + n;
+	ir_node *irn;
+	ir_node **real_in;
+
+	real_in = malloc(sizeof(real_in[0]) * (real_n));
 
-static int cmp_op_map(const void *a, const void *b, size_t size)
+	real_in[0] = mem;
+	real_in[1] = sp;
+	real_in[2] = ptr;
+	memcpy(&real_in[3], in, n * sizeof(in[0]));
+
+	irn = new_ir_node(NULL, irg, bl, op_be_Call, mode_T, real_n, real_in);
+	init_node_attr(irn, (n_outs > real_n ? n_outs : real_n));
+	return irn;
+}
+
+entity *be_Call_get_entity(const ir_node *call)
 {
-  const be_op_t *x = a;
-  const be_op_t *y = b;
+	be_call_attr_t *a = get_irn_attr(call);
+	assert(be_is_Call(call));
+	return a->ent;
+}
 
-  return !(x->kind == y->kind && x->cls == y->cls);
+void    be_Call_set_entity(ir_node *call, entity *ent)
+{
+	be_call_attr_t *a = get_irn_attr(call);
+	assert(be_is_Call(call));
+	a->ent = ent;
 }
 
-static be_op_t *get_op(const be_node_factory_t *fact,
-    const arch_register_class_t *cls, node_kind_t kind)
+ir_node *be_new_Return(ir_graph *irg, ir_node *bl, int n, ir_node *in[])
 {
-  be_op_t templ;
+	ir_node *irn = new_ir_node(NULL, irg, bl, op_be_Return, mode_X, n, in);
+	init_node_attr(irn, n);
+
+	return irn;
+}
+
+ir_node *be_new_IncSP(const arch_register_t *sp, ir_graph *irg, ir_node *bl, ir_node *old_sp, ir_node *mem, unsigned offset, be_stack_dir_t dir)
+{
+	be_stack_attr_t *a;
+	ir_node *irn;
+	ir_node *in[1];
+
+	in[0]     = old_sp;
+	in[1]     = mem;
+	irn       = new_ir_node(NULL, irg, bl, op_be_IncSP, sp->reg_class->mode, 2, in);
+	a         = init_node_attr(irn, 1);
+	a->dir    = dir;
+	a->offset = offset;
 
-  templ.kind = kind;
-  templ.cls = cls;
+	be_node_set_flags(irn, -1, arch_irn_flags_ignore);
 
-  return set_insert(fact->ops, &templ, sizeof(templ),
-      HASH_PTR(cls) + 7 * kind);
+	/* Set output constraint to stack register. */
+	be_node_set_reg_class(irn, 0, sp->reg_class);
+	be_set_constr_single_reg(irn, -1, sp);
+	be_node_set_irn_reg(NULL, irn, sp);
+
+	return irn;
 }
 
-ir_node *new_Spill(const be_node_factory_t *factory,
-    const arch_register_class_t *cls,
-    ir_graph *irg, ir_node *bl, ir_node *node_to_spill, ir_node *ctx)
+ir_node *be_new_AddSP(const arch_register_t *sp, ir_graph *irg, ir_node *bl, ir_node *old_sp, ir_node *sz)
 {
-	be_spill_attr_t *attr;
+	be_node_attr_t *a;
 	ir_node *irn;
-  ir_node *in[1];
-  ir_op *op = get_op(factory, cls, node_kind_spill)->op;
+	ir_node *in[be_pos_AddSP_last];
+
+	in[be_pos_AddSP_old_sp] = old_sp;
+	in[be_pos_AddSP_size]   = sz;
+
+	irn      = new_ir_node(NULL, irg, bl, op_be_AddSP, mode_T, be_pos_AddSP_last, in);
+	a        = init_node_attr(irn, be_pos_AddSP_last);
+
+	be_node_set_flags(irn, OUT_POS(0), arch_irn_flags_ignore);
 
-  assert(op && "Spill opcode must be present for this register class");
-  in[0] = node_to_spill;
-	irn  = new_ir_node(NULL, irg, bl, op, mode_M, 1, in);
-	attr = (be_spill_attr_t *) init_node_attr(irn, factory, 0);
-	attr->spill_ctx = ctx;
+	/* Set output constraint to stack register. */
+	be_set_constr_single_reg(irn, OUT_POS(0), sp);
 
-  return irn;
+	return irn;
 }
 
-ir_node *new_Reload(const be_node_factory_t *factory,
-    const arch_register_class_t *cls, ir_graph *irg,
-    ir_node *bl, ir_mode *mode, ir_node *spill_node)
+ir_node *be_new_SetSP(const arch_register_t *sp, ir_graph *irg, ir_node *bl, ir_node *old_sp, ir_node *op, ir_node *mem)
 {
-  ir_node *irn, *in[1];
-  ir_op *op = get_op(factory, cls, node_kind_reload)->op;
+	be_node_attr_t *a;
+	ir_node *irn;
+	ir_node *in[3];
+
+	in[0]    = mem;
+	in[1]    = old_sp;
+	in[2]    = op;
+	irn      = new_ir_node(NULL, irg, bl, op_be_SetSP, get_irn_mode(old_sp), 3, in);
+	a        = init_node_attr(irn, 3);
 
-  assert(op && "Reload opcode must be present for this register class");
-  // assert(is_Spill(factory, spill_node) && "Operand of Reload must be a Spill");
-  in[0] = spill_node;
+	be_node_set_flags(irn, OUT_POS(0), arch_irn_flags_ignore);
 
-  irn  = new_ir_node(NULL, irg, bl, op, mode, 1, in);
-	init_node_attr(irn, factory, 1);
+	/* Set output constraint to stack register. */
+	be_set_constr_single_reg(irn, OUT_POS(0), sp);
+	be_node_set_reg_class(irn, 1, sp->reg_class);
+	be_node_set_reg_class(irn, 2, sp->reg_class);
+	be_node_set_irn_reg(NULL, irn, sp);
 
 	return irn;
 }
 
-ir_node *new_Perm(const be_node_factory_t *factory,
-    const arch_register_class_t *cls,
-    ir_graph *irg, ir_node *bl, int arity, ir_node **in)
+ir_node *be_new_StackParam(const arch_register_class_t *cls, const arch_register_class_t *cls_frame, ir_graph *irg, ir_node *bl, ir_mode *mode, ir_node *frame_pointer, entity *ent)
 {
+	be_frame_attr_t *a;
 	ir_node *irn;
-  ir_op *op = get_op(factory, cls, node_kind_perm)->op;
+	ir_node *in[1];
 
-  irn  = new_ir_node(NULL, irg, bl, op, mode_T, arity, in);
-	init_node_attr(irn, factory, arity);
+	in[0] = frame_pointer;
+	irn = new_ir_node(NULL, irg, bl, op_be_StackParam, mode, 1, in);
+	a = init_node_attr(irn, 1);
+	a->ent = ent;
 
+	be_node_set_reg_class(irn, 0, cls_frame);
+	be_node_set_reg_class(irn, OUT_POS(0), cls);
 	return irn;
 }
 
-ir_node *new_Copy(const be_node_factory_t *factory,
-    const arch_register_class_t *cls,
-    ir_graph *irg, ir_node *bl, ir_node *in)
+ir_node *be_new_RegParams(ir_graph *irg, ir_node *bl, int n_outs)
 {
-  ir_node *irn, *ins[1];
-  ir_op *op = get_op(factory, cls, node_kind_copy)->op;
+	ir_node *irn;
+	ir_node *in[1];
 
-  ins[0] = in;
+	irn = new_ir_node(NULL, irg, bl, op_be_RegParams, mode_T, 0, in);
+	init_node_attr(irn, n_outs);
+	return irn;
+}
 
-  irn  = new_ir_node(NULL, irg, bl, op, get_irn_mode(in), 1, ins);
-	init_node_attr(irn, factory, 1);
+ir_node *be_new_FrameLoad(const arch_register_class_t *cls_frame, const arch_register_class_t *cls_data,
+						  ir_graph *irg, ir_node *bl, ir_node *mem, ir_node *frame, entity *ent)
+{
+	be_frame_attr_t *a;
+	ir_node *irn;
+	ir_node *in[2];
+
+	in[0]  = mem;
+	in[1]  = frame;
+	irn    = new_ir_node(NULL, irg, bl, op_be_FrameLoad, mode_T, 2, in);
+	a      = init_node_attr(irn, 3);
+	a->ent = ent;
+	a->offset = 0;
+	be_node_set_reg_class(irn, 1, cls_frame);
+	be_node_set_reg_class(irn, OUT_POS(pn_Load_res), cls_data);
+	return irn;
+}
 
+ir_node *be_new_FrameStore(const arch_register_class_t *cls_frame, const arch_register_class_t *cls_data,
+						   ir_graph *irg, ir_node *bl, ir_node *mem, ir_node *frame, ir_node *data, entity *ent)
+{
+	be_frame_attr_t *a;
+	ir_node *irn;
+	ir_node *in[3];
+
+	in[0]  = mem;
+	in[1]  = frame;
+	in[2]  = data;
+	irn    = new_ir_node(NULL, irg, bl, op_be_FrameStore, mode_T, 3, in);
+	a      = init_node_attr(irn, 3);
+	a->ent = ent;
+	a->offset = 0;
+	be_node_set_reg_class(irn, 1, cls_frame);
+	be_node_set_reg_class(irn, 2, cls_data);
 	return irn;
 }
 
-ir_node *be_spill(
-		const be_node_factory_t *factory,
-		const arch_env_t *arch_env,
-		ir_node *irn, ir_node *ctx)
+ir_node *be_new_FrameAddr(const arch_register_class_t *cls_frame, ir_graph *irg, ir_node *bl, ir_node *frame, entity *ent)
 {
-  const arch_register_class_t *cls = arch_get_irn_reg_class(arch_env, irn, -1);
+	be_frame_attr_t *a;
+	ir_node *irn;
+	ir_node *in[1];
+
+	in[0]  = frame;
+	irn    = new_ir_node(NULL, irg, bl, op_be_FrameAddr, get_irn_mode(frame), 1, in);
+	a      = init_node_attr(irn, 1);
+	a->ent = ent;
+	a->offset = 0;
+	be_node_set_reg_class(irn, 0, cls_frame);
+	be_node_set_reg_class(irn, OUT_POS(0), cls_frame);
+	return irn;
+}
 
-  ir_node *bl    = get_nodes_block(irn);
-  ir_graph *irg  = get_irn_irg(bl);
-  ir_node *spill = new_Spill(factory, cls, irg, bl, irn, ctx);
-	ir_node *insert;
+ir_node *be_new_CopyKeep(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, ir_node *src, int n, ir_node *in_keep[], ir_mode *mode)
+{
+	ir_node *irn;
+	ir_node **in = (ir_node **) alloca((n + 1) * sizeof(in[0]));
 
-	/*
-	 * search the right insertion point. a spill of a phi cannot be put
-	 * directly after the phi, if there are some phis behind the one which
-	 * is spilled.
-	 */
-	insert = sched_next(irn);
-	while(is_Phi(insert) && !sched_is_end(insert))
-		insert = sched_next(insert);
+	in[0] = src;
+	memcpy(&in[1], in_keep, n * sizeof(in[0]));
+	irn   = new_ir_node(NULL, irg, bl, op_be_CopyKeep, mode, n + 1, in);
+	init_node_attr(irn, n);
+	be_node_set_reg_class(irn, OUT_POS(0), cls);
+	be_node_set_reg_class(irn, 0, cls);
 
-	sched_add_before(insert, spill);
-  return spill;
+	return irn;
 }
 
-ir_node *be_reload(const be_node_factory_t *factory,
-				   const arch_env_t *arch_env,
-				   const arch_register_class_t *cls,
-				   ir_node *irn, int pos, ir_mode *mode, ir_node *spill)
+ir_node *be_new_CopyKeep_single(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, ir_node *src, ir_node *keep, ir_mode *mode)
 {
-	ir_node *reload;
+	ir_node *in[1];
 
-  ir_node *bl   = get_nodes_block(irn);
-  ir_graph *irg = get_irn_irg(bl);
+	in[0] = keep;
+	return be_new_CopyKeep(cls, irg, bl, src, 1, in, mode);
+}
 
-	assert(is_Spill(factory, spill)
-			|| (is_Phi(spill) && get_irn_mode(spill) == mode_M));
+ir_node *be_new_Epilogue(ir_graph *irg, ir_node *bl, int n, ir_node *in[])
+{
+	ir_node *irn;
 
-  reload = new_Reload(factory, cls, irg, bl, mode, spill);
+	irn = new_ir_node(NULL, irg, bl, op_be_Epilogue, mode_T, n, in);
+	init_node_attr(irn, n);
+	return irn;
+}
 
-	set_irn_n(irn, pos, reload);
-  sched_add_before(irn, reload);
-  return reload;
+int be_is_Spill         (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_Spill          ; }
+int be_is_Reload        (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_Reload         ; }
+int be_is_Copy          (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_Copy           ; }
+int be_is_Perm          (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_Perm           ; }
+int be_is_Keep          (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_Keep           ; }
+int be_is_Call          (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_Call           ; }
+int be_is_Return        (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_Return         ; }
+int be_is_IncSP         (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_IncSP          ; }
+int be_is_SetSP         (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_SetSP          ; }
+int be_is_AddSP         (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_AddSP          ; }
+int be_is_RegParams     (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_RegParams      ; }
+int be_is_StackParam    (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_StackParam     ; }
+int be_is_FrameAddr     (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_FrameAddr      ; }
+int be_is_FrameLoad     (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_FrameLoad      ; }
+int be_is_FrameStore    (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_FrameStore     ; }
+int be_is_Epilogue        (const ir_node *irn) { return be_get_irn_opcode(irn) == beo_Epilogue         ; }
+
+int be_has_frame_entity(const ir_node *irn)
+{
+	switch(be_get_irn_opcode(irn)) {
+	case beo_StackParam:
+	case beo_Spill:
+	case beo_Reload:
+	case beo_FrameStore:
+	case beo_FrameLoad:
+	case beo_FrameAddr:
+		return 1;
+	}
+
+	return 0;
+}
+
+entity *be_get_frame_entity(const ir_node *irn)
+{
+	if(be_has_frame_entity(irn)) {
+		be_frame_attr_t *a = get_irn_attr(irn);
+		return a->ent;
+	}
+	return NULL;
+}
+
+static void be_limited(void *data, bitset_t *bs)
+{
+	be_req_t *req = data;
+
+	switch(req->kind) {
+	case be_req_kind_negate_old_limited:
+	case be_req_kind_old_limited:
+		req->x.old_limited.old_limited(req->x.old_limited.old_limited_env, bs);
+		if(req->kind == be_req_kind_negate_old_limited)
+			bitset_flip_all(bs);
+		break;
+	case be_req_kind_single_reg:
+		bitset_clear_all(bs);
+		bitset_set(bs, req->x.single_reg->index);
+		break;
+	}
+}
+
+static INLINE be_req_t *get_req(ir_node *irn, int pos)
+{
+	int idx           = pos < 0 ? -(pos + 1) : pos;
+	be_node_attr_t *a = get_irn_attr(irn);
+	be_reg_data_t *rd = &a->reg_data[idx];
+	be_req_t       *r = pos < 0 ? &rd->req : &rd->in_req;
+
+	assert(is_be_node(irn));
+	assert(!(pos >= 0) || pos < get_irn_arity(irn));
+	assert(!(pos < 0)  || -(pos + 1) <= a->max_reg_data);
+
+	return r;
+}
+
+void be_set_constr_single_reg(ir_node *irn, int pos, const arch_register_t *reg)
+{
+	be_req_t *r = get_req(irn, pos);
+
+	r->kind            = be_req_kind_single_reg;
+	r->x.single_reg    = reg;
+	r->req.limited     = be_limited;
+	r->req.limited_env = r;
+	r->req.type        = arch_register_req_type_limited;
+	r->req.cls         = reg->reg_class;
+}
+
+void be_set_constr_limited(ir_node *irn, int pos, const arch_register_req_t *req)
+{
+	be_req_t *r = get_req(irn, pos);
+
+	assert(arch_register_req_is(req, limited));
+
+	r->kind            = be_req_kind_old_limited;
+	r->req.limited     = be_limited;
+	r->req.limited_env = r;
+	r->req.type        = arch_register_req_type_limited;
+	r->req.cls         = req->cls;
+
+	r->x.old_limited.old_limited     = req->limited;
+	r->x.old_limited.old_limited_env = req->limited_env;
+}
+
+void be_node_set_flags(ir_node *irn, int pos, arch_irn_flags_t flags)
+{
+	be_req_t *r = get_req(irn, pos);
+	r->flags = flags;
+}
+
+void be_node_set_reg_class(ir_node *irn, int pos, const arch_register_class_t *cls)
+{
+	be_req_t *r = get_req(irn, pos);
+	r->req.cls = cls;
+	if(r->req.type == arch_register_req_type_none)
+		r->req.type = arch_register_req_type_normal;
+}
+
+void be_set_IncSP_offset(ir_node *irn, unsigned offset)
+{
+	be_stack_attr_t *a = get_irn_attr(irn);
+	assert(be_is_IncSP(irn));
+	a->offset = offset;
+}
+
+unsigned be_get_IncSP_offset(const ir_node *irn)
+{
+	be_stack_attr_t *a = get_irn_attr(irn);
+	assert(be_is_IncSP(irn));
+	return a->offset;
+}
+
+void be_set_IncSP_direction(ir_node *irn, be_stack_dir_t dir)
+{
+	be_stack_attr_t *a = get_irn_attr(irn);
+	assert(be_is_IncSP(irn));
+	a->dir = dir;
+}
+
+be_stack_dir_t be_get_IncSP_direction(const ir_node *irn)
+{
+	be_stack_attr_t *a = get_irn_attr(irn);
+	assert(be_is_IncSP(irn));
+	return a->dir;
+}
+
+void be_set_Spill_entity(ir_node *irn, entity *ent)
+{
+	be_spill_attr_t *a = get_irn_attr(irn);
+	assert(be_is_Spill(irn));
+	a->frame_attr.ent = ent;
+}
+
+static ir_node *find_a_spill_walker(ir_node *irn, unsigned visited_nr)
+{
+	unsigned nr = get_irn_visited(irn);
+
+	set_irn_visited(irn, visited_nr);
+
+	if(is_Phi(irn)) {
+		int i, n;
+		if(nr < visited_nr) {
+			for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
+				ir_node *n = find_a_spill_walker(get_irn_n(irn, i), visited_nr);
+				if(n != NULL)
+					return n;
+			}
+		}
+	}
+
+	else if(be_get_irn_opcode(irn) == beo_Spill)
+		return irn;
+
+	return NULL;
+}
+
+ir_node *be_get_Spill_context(const ir_node *irn) {
+	const be_spill_attr_t *a = get_irn_attr(irn);
+	assert(be_is_Spill(irn));
+	return a->spill_ctx;
 }
 
 /**
- * If the node is a proj, reset the node to the proj's target and return
- * the proj number.
- * @param node The address of a node pointer.
- * @param def  A default value.
- * @return     If *node is a Proj, *node is set to the Proj's target and
- *             the Proj number is returned. Else *node remains the same and @p def
- *             is returned.
+ * Finds a spill for a reload.
+ * If the reload is directly using the spill, this is simple,
+ * else we perform DFS from the reload (over all PhiMs) and return
+ * the first spill node we find.
  */
-static int redir_proj(const ir_node **node, int def)
+static INLINE ir_node *find_a_spill(const ir_node *irn)
+{
+	ir_graph *irg       = get_irn_irg(irn);
+	unsigned visited_nr = get_irg_visited(irg) + 1;
+
+	assert(be_is_Reload(irn));
+	set_irg_visited(irg, visited_nr);
+	return find_a_spill_walker(be_get_Reload_mem(irn), visited_nr);
+}
+
+entity *be_get_spill_entity(const ir_node *irn)
 {
-  const ir_node *n = *node;
+	int opc           = get_irn_opcode(irn);
 
-  if(is_Proj(n)) {
-    *node = get_Proj_pred(n);
-    def = -(get_Proj_proj(n) + 1);
-  }
+	switch(be_get_irn_opcode(irn)) {
+	case beo_Reload:
+		{
+			ir_node *spill = find_a_spill(irn);
+			return be_get_spill_entity(spill);
+		}
+	case beo_Spill:
+		{
+			be_spill_attr_t *a = get_irn_attr(irn);
+			return a->frame_attr.ent;
+		}
+	default:
+		assert(0 && "Must give spill/reload node");
+		break;
+	}
 
-  return def;
+	return NULL;
 }
 
-static const arch_register_req_t *
-be_node_get_irn_reg_req(const arch_irn_ops_t *_self,
-    arch_register_req_t *req, const ir_node *irn, int pos)
+static void link_reload_walker(ir_node *irn, void *data)
+{
+	ir_node **root = (ir_node **) data;
+	if(be_is_Reload(irn)) {
+		set_irn_link(irn, *root);
+		*root = irn;
+	}
+}
+
+void be_copy_entities_to_reloads(ir_graph *irg)
+{
+	ir_node *irn = NULL;
+	irg_walk_graph(irg, link_reload_walker, NULL, (void *) &irn);
+
+	while(irn) {
+		be_frame_attr_t *a = get_irn_attr(irn);
+		entity *ent        = be_get_spill_entity(irn);
+		a->ent = ent;
+		irn    = get_irn_link(irn);
+	}
+}
+
+ir_node *be_spill(const arch_env_t *arch_env, ir_node *irn, ir_node *ctx)
 {
-	be_op_t *bo;
-	const be_node_factory_t *factory =
-		container_of(_self, const be_node_factory_t, irn_ops);
+	ir_node *bl    = get_nodes_block(irn);
+	ir_graph *irg  = get_irn_irg(bl);
+	ir_node *frame = get_irg_frame(irg);
+	ir_node *spill;
+	ir_node *insert;
+
+	const arch_register_class_t *cls       = arch_get_irn_reg_class(arch_env, irn, -1);
+	const arch_register_class_t *cls_frame = arch_get_irn_reg_class(arch_env, frame, -1);
+
+	spill = be_new_Spill(cls, cls_frame, irg, bl, frame, irn, ctx);
 
 	/*
-	 * were interested in an output operand, so
-	 * let's resolve projs.
+	 * search the right insertion point. a spill of a phi cannot be put
+	 * directly after the phi, if there are some phis behind the one which
+	 * is spilled. Also, a spill of a Proj must be after all Projs of the
+	 * same tuple node.
 	 */
-	if(pos < 0)
-		pos = redir_proj((const ir_node **) &irn, pos);
+	insert = sched_next(irn);
+	while((is_Phi(insert) || is_Proj(insert)) && !sched_is_end(insert))
+		insert = sched_next(insert);
 
-	bo = pmap_get(factory->irn_op_map, get_irn_op(irn));
+	/*
+	 * Here's one special case:
+	 * If the spill is in the start block, the spill must be after the frame
+	 * pointer is set up. This is checked here and fixed.
+	 * If the insertion point is already the block, everything is fine, since
+	 * the Spill gets inserted at the end of the block.
+	 */
+	if(bl == get_irg_start_block(irg) && insert != bl && sched_comes_after(insert, frame))
+		insert = sched_next(frame);
 
-	if(bo) {
-		int i;
+	sched_add_before(insert, spill);
+	return spill;
+}
+
+ir_node *be_reload(const arch_env_t *arch_env, const arch_register_class_t *cls, ir_node *reloader, ir_mode *mode, ir_node *spill)
+{
+	ir_node *reload;
 
-		req->type = arch_register_req_type_normal;
-		req->cls  = bo->cls;
+	ir_node *bl    = is_Block(reloader) ? reloader : get_nodes_block(reloader);
+	ir_graph *irg  = get_irn_irg(bl);
+	ir_node *frame = get_irg_frame(irg);
+	const arch_register_class_t *cls_frame = arch_get_irn_reg_class(arch_env, frame, -1);
 
-		for(i = 0; i < bo->n_pos; ++i)
-			if(pos == bo->pos[i])
-				return req;
-	}
+	assert(be_is_Spill(spill) || (is_Phi(spill) && get_irn_mode(spill) == mode_M));
 
-	return NULL;
+	reload = be_new_Reload(cls, cls_frame, irg, bl, frame, spill, mode);
+
+	sched_add_before(reloader, reload);
+	return reload;
 }
 
-void
-be_node_set_irn_reg(const arch_irn_ops_t *_self, ir_node *irn,
-    const arch_register_t *reg)
+static void *put_out_reg_req(arch_register_req_t *req, const ir_node *irn, int out_pos)
 {
-	int pos;
-	be_op_t *bo;
-	be_node_attr_t *attr;
-	const be_node_factory_t *factory =
-		container_of(_self, const be_node_factory_t, irn_ops);
+	const be_node_attr_t *a = get_irn_attr(irn);
 
-	pos = redir_proj((const ir_node **) &irn, -1);
-	bo = pmap_get(factory->irn_op_map, get_irn_op(irn));
+	if(out_pos < a->max_reg_data)
+		memcpy(req, &a->reg_data[out_pos].req, sizeof(req[0]));
+	else {
+		req->type = arch_register_req_type_none;
+		req->cls  = NULL;
+	}
 
-	if(!bo)
-		return;
+	return req;
+}
+
+static void *put_in_reg_req(arch_register_req_t *req, const ir_node *irn, int pos)
+{
+	const be_node_attr_t *a = get_irn_attr(irn);
+	int n                   = get_irn_arity(irn);
+
+	if(pos < get_irn_arity(irn) && pos < a->max_reg_data)
+		memcpy(req, &a->reg_data[pos].in_req, sizeof(req[0]));
+	else {
+		req->type = arch_register_req_type_none;
+		req->cls  = NULL;
+	}
 
-	attr = (be_node_attr_t *) &irn->attr;
-	attr->reg[-pos - 1] = reg;
+	return req;
 }
 
-const arch_register_t *
-be_node_get_irn_reg(const arch_irn_ops_t *_self, const ir_node *irn)
+static const arch_register_req_t *
+be_node_get_irn_reg_req(const void *self, arch_register_req_t *req, const ir_node *irn, int pos)
 {
-	int i, pos;
-	be_op_t *bo;
-	const be_node_factory_t *factory =
-		container_of(_self, const be_node_factory_t, irn_ops);
+	int out_pos = pos;
 
-	pos = redir_proj((const ir_node **) &irn, -1);
-	bo = pmap_get(factory->irn_op_map, get_irn_op(irn));
+	if(pos < 0) {
+		if(get_irn_mode(irn) == mode_T)
+			return NULL;
 
-	if(!bo)
-		return NULL;
+		out_pos = redir_proj((const ir_node **) &irn, pos);
+		assert(is_be_node(irn));
+		return put_out_reg_req(req, irn, out_pos);
+	}
 
-	for(i = 0; i < bo->n_pos; ++i) {
-		if(bo->pos[i] == pos) {
-			be_node_attr_t *attr = (be_node_attr_t *) &irn->attr;
-			return attr->reg[-pos - 1];
-		}
+	else {
+		return is_be_node(irn) ? put_in_reg_req(req, irn, pos) : NULL;
 	}
 
-	return NULL;
+	return req;
 }
 
-arch_irn_class_t be_node_classify(const arch_irn_ops_t *_self, const ir_node *irn)
+const arch_register_t *
+be_node_get_irn_reg(const void *_self, const ir_node *irn)
 {
-  const be_node_factory_t *factory =
-    container_of(_self, const be_node_factory_t, irn_ops);
+	int out_pos;
+	be_node_attr_t *a;
 
-  be_op_t *bo;
-  int idx;
+	out_pos = redir_proj((const ir_node **) &irn, -1);
+	a       = get_irn_attr(irn);
 
-  idx = redir_proj(&irn, 0);
-  bo = pmap_get(factory->irn_op_map, get_irn_op(irn));
+	assert(is_be_node(irn));
+	assert(out_pos < a->max_reg_data && "position too high");
+
+	return a->reg_data[out_pos].reg;
+}
 
-	switch(bo->kind) {
-#define XXX(a) case node_kind_ ## a: return arch_irn_class_ ## a;
-		XXX(spill)
-		XXX(reload)
-		XXX(perm)
-		XXX(copy)
+static arch_irn_class_t be_node_classify(const void *_self, const ir_node *irn)
+{
+	redir_proj((const ir_node **) &irn, -1);
+
+	switch(be_get_irn_opcode(irn)) {
+#define XXX(a,b) case beo_ ## a: return arch_irn_class_ ## b;
+		XXX(Spill, spill)
+		XXX(Reload, reload)
+		XXX(Perm, perm)
+		XXX(Copy, copy)
 #undef XXX
 		default:
 		return 0;
 	}
 
-  return 0;
-}
-
-arch_irn_class_t be_node_get_flags(const arch_irn_ops_t *_self, const ir_node *irn)
-{
 	return 0;
 }
 
-static const arch_irn_ops_t *
-be_node_get_irn_ops(const arch_irn_handler_t *_self, const ir_node *irn)
+static arch_irn_flags_t be_node_get_flags(const void *_self, const ir_node *irn)
 {
-  be_op_t *bo;
-  const be_node_factory_t *factory =
-    container_of(_self, const be_node_factory_t, handler);
+	int out_pos;
+	be_node_attr_t *a;
+
+	out_pos = redir_proj((const ir_node **) &irn, -1);
+	a       = get_irn_attr(irn);
 
-  redir_proj(&irn, 0);
-  bo = pmap_get(factory->irn_op_map, get_irn_op(irn));
+	assert(is_be_node(irn));
+	assert(out_pos < a->max_reg_data && "position too high");
 
-  return bo ? &factory->irn_ops : NULL;
+	return a->reg_data[out_pos].req.flags;
 }
 
-const arch_irn_handler_t *be_node_get_irn_handler(const be_node_factory_t *f)
+static entity *be_node_get_frame_entity(const void *self, const ir_node *irn)
 {
-  return &f->handler;
+	return be_get_frame_entity(irn);
 }
 
-int is_Spill(const be_node_factory_t *f, const ir_node *irn)
+static void be_node_set_frame_offset(const void *self, ir_node *irn, int offset)
 {
-  be_op_t *bo;
-  bo = pmap_get(f->irn_op_map, get_irn_op(irn));
-  return bo != NULL && bo->kind == node_kind_spill;
+	if(be_has_frame_entity(irn)) {
+		be_frame_attr_t *a = get_irn_attr(irn);
+		a->offset = offset;
+	}
 }
 
-be_node_factory_t *be_node_factory_init(be_node_factory_t *factory, const arch_isa_t *isa)
-{
-  int i, j, n;
 
-  factory->ops = new_set(cmp_op_map, 64);
-  factory->irn_op_map = pmap_create();
-  obstack_init(&factory->obst);
+static const arch_irn_ops_if_t be_node_irn_ops_if = {
+	be_node_get_irn_reg_req,
+	be_node_set_irn_reg,
+	be_node_get_irn_reg,
+	be_node_classify,
+	be_node_get_flags,
+	be_node_get_frame_entity,
+	be_node_set_frame_offset
+};
 
-  factory->handler.get_irn_ops = be_node_get_irn_ops;
+static const arch_irn_ops_t be_node_irn_ops = {
+	&be_node_irn_ops_if
+};
 
-  factory->irn_ops.get_irn_reg_req = be_node_get_irn_reg_req;
-  factory->irn_ops.set_irn_reg     = be_node_set_irn_reg;
-  factory->irn_ops.get_irn_reg     = be_node_get_irn_reg;
-  factory->irn_ops.classify        = be_node_classify;
-  factory->irn_ops.get_flags       = be_node_get_flags;
+const void *be_node_get_arch_ops(const arch_irn_handler_t *self, const ir_node *irn)
+{
+	redir_proj((const ir_node **) &irn, -1);
+	return is_be_node(irn) ? &be_node_irn_ops : NULL;
+}
 
-  for(i = 0, n = arch_isa_get_n_reg_class(isa); i < n; ++i) {
-    const arch_register_class_t *cls = arch_isa_get_reg_class(isa, i);
-    be_op_t *ent;
+const arch_irn_handler_t be_node_irn_handler = {
+	be_node_get_arch_ops
+};
 
-    ent = get_op(factory, cls, node_kind_spill);
-    ent->op = new_ir_op(get_next_ir_opcode(), "Spill", op_pin_state_pinned,
-        0, oparity_unary, 0, sizeof(be_spill_attr_t), &be_node_ops);
-    ent->n_pos = ARRSIZE(templ_pos_Spill);
-    ent->pos = templ_pos_Spill;
-    pmap_insert(factory->irn_op_map, ent->op, ent);
 
-    ent = get_op(factory, cls, node_kind_reload);
-    ent->op = new_ir_op(get_next_ir_opcode(), "Reload", op_pin_state_pinned, 0,
-        oparity_unary, 0, sizeof(be_node_attr_t), &be_node_ops);
-    ent->n_pos = ARRSIZE(templ_pos_Reload);
-    ent->pos = templ_pos_Reload;
-    pmap_insert(factory->irn_op_map, ent->op, ent);
+static void dump_node_req(FILE *f, be_req_t *req)
+{
+	unsigned i;
+	int did_something = 0;
+	const char *suffix = "";
+
+	if(req->flags != arch_irn_flags_none) {
+		fprintf(f, "flags: ");
+		for(i = arch_irn_flags_none; i <= log2_ceil(arch_irn_flags_last); ++i) {
+			if(req->flags & (1 << i)) {
+				fprintf(f, "%s%s", suffix, arch_irn_flag_str(1 << i));
+				suffix = "|";
+			}
+		}
+		suffix = ", ";
+		did_something = 1;
+	}
 
-    ent = get_op(factory, cls, node_kind_copy);
-    ent->op = new_ir_op(get_next_ir_opcode(), "Copy", op_pin_state_pinned, 0,
-        oparity_unary, 0, sizeof(be_node_attr_t), &be_node_ops);
-    ent->n_pos = ARRSIZE(templ_pos_Copy);
-    ent->pos = templ_pos_Copy;
-    pmap_insert(factory->irn_op_map, ent->op, ent);
+	if(req->req.cls != 0) {
+		char tmp[256];
+		fprintf(f, suffix);
+		arch_register_req_format(tmp, sizeof(tmp), &req->req);
+		fprintf(f, "%s", tmp);
+		did_something = 1;
+	}
+
+	if(did_something)
+		fprintf(f, "\n");
+}
+
+static void dump_node_reqs(FILE *f, ir_node *irn)
+{
+	int i;
+	be_node_attr_t *a = get_irn_attr(irn);
 
-    ent = get_op(factory, cls, node_kind_perm);
-    ent->op = new_ir_op(get_next_ir_opcode(), "Perm", op_pin_state_pinned, 0,
-        oparity_variable, 0,
-				sizeof(be_node_attr_t) + sizeof(arch_register_t) * cls->n_regs, &be_node_ops);
-    ent->n_pos = 2 * cls->n_regs;
-    ent->pos = obstack_alloc(&factory->obst, sizeof(ent->pos[0]) * ent->n_pos);
-    for(j = 0; j < ent->n_pos; j += 2) {
-    	int k = j / 2;
-      ent->pos[j] = k;
-      ent->pos[j + 1] = -(k + 1);
-    }
-    pmap_insert(factory->irn_op_map, ent->op, ent);
+	fprintf(f, "registers: \n");
+	for(i = 0; i < a->max_reg_data; ++i) {
+		be_reg_data_t *rd = &a->reg_data[i];
+		if(rd->reg)
+			fprintf(f, "#%d: %s\n", i, rd->reg->name);
+	}
 
-  }
+	fprintf(f, "in requirements\n");
+	for(i = 0; i < a->max_reg_data; ++i) {
+		dump_node_req(f, &a->reg_data[i].in_req);
+	}
 
-  return factory;
+	fprintf(f, "\nout requirements\n");
+	for(i = 0; i < a->max_reg_data; ++i) {
+		dump_node_req(f, &a->reg_data[i].req);
+	}
 }
 
 static int dump_node(ir_node *irn, FILE *f, dump_reason_t reason)
 {
-	be_node_attr_t *attr = (be_node_attr_t *) &irn->attr;
-  be_op_t *bo          = pmap_get(attr->factory->irn_op_map, get_irn_op(irn));
+	be_node_attr_t *at = get_irn_attr(irn);
 
-	int i;
+	assert(is_be_node(irn));
 
 	switch(reason) {
 		case dump_node_opcode_txt:
-			fprintf(f, get_op_name(bo->op));
+			fprintf(f, get_op_name(get_irn_op(irn)));
 			break;
 		case dump_node_mode_txt:
 			fprintf(f, get_mode_name(get_irn_mode(irn)));
 			break;
 		case dump_node_nodeattr_txt:
-			fprintf(f, bo->cls->name);
 			break;
 		case dump_node_info_txt:
-			for(i = 0; i < attr->n_regs; ++i) {
-				const arch_register_t *reg = attr->reg[i];
-				fprintf(f, "reg #%d: %s\n", i, reg ? reg->name : "n/a");
+			dump_node_reqs(f, irn);
+
+			if(be_has_frame_entity(irn)) {
+				be_frame_attr_t *a = (be_frame_attr_t *) at;
+				if (a->ent)
+					ir_fprintf(f, "frame entity: %+F offset %x (%d)\n", a->ent, a->offset, a->offset);
+
 			}
 
-			if(bo->kind == node_kind_spill) {
-				be_spill_attr_t *a = (be_spill_attr_t *) attr;
-				ir_fprintf(f, "spill context: %+F\n", a->spill_ctx);
+			switch(be_get_irn_opcode(irn)) {
+			case beo_Spill:
+				{
+					be_spill_attr_t *a = (be_spill_attr_t *) at;
+					ir_fprintf(f, "spill context: %+F\n", a->spill_ctx);
+				}
+				break;
+
+			case beo_IncSP:
+				{
+					be_stack_attr_t *a = (be_stack_attr_t *) at;
+					fprintf(f, "offset: %u\n", a->offset);
+					fprintf(f, "direction: %s\n", a->dir == be_stack_dir_along ? "along" : "against");
+				}
+				break;
 			}
-			break;
+
+	}
+
+	return 0;
+}
+
+/**
+ * Copies the backend specific attributes from old node to new node.
+ */
+static void copy_attr(const ir_node *old_node, ir_node *new_node)
+{
+	be_node_attr_t *old_attr = get_irn_attr(old_node);
+	be_node_attr_t *new_attr = get_irn_attr(new_node);
+	int i;
+
+	assert(is_be_node(old_node));
+	assert(is_be_node(new_node));
+
+	memcpy(new_attr, old_attr, get_op_attr_size(get_irn_op(old_node)));
+	new_attr->reg_data = NULL;
+
+	if(new_attr->max_reg_data > 0) {
+		new_attr->reg_data = NEW_ARR_D(be_reg_data_t, get_irg_obstack(get_irn_irg(new_node)), new_attr->max_reg_data);
+		memcpy(new_attr->reg_data, old_attr->reg_data, new_attr->max_reg_data * sizeof(be_reg_data_t));
+
+		for(i = 0; i < old_attr->max_reg_data; ++i) {
+			be_req_t *r;
+
+			r = &new_attr->reg_data[i].req;
+			r->req.limited_env = r;
+
+			r = &new_attr->reg_data[i].in_req;
+			r->req.limited_env = r;
+		}
 	}
+}
+
+static const ir_op_ops be_node_op_ops = {
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	copy_attr,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	dump_node,
+	NULL
+};
+
+pset *nodes_live_at(const arch_env_t *arch_env, const arch_register_class_t *cls, const ir_node *pos, pset *live)
+{
+	firm_dbg_module_t *dbg = firm_dbg_register("firm.be.node");
+	const ir_node *bl      = is_Block(pos) ? pos : get_nodes_block(pos);
+	ir_node *irn;
+	irn_live_t *li;
+
+	live_foreach(bl, li) {
+		ir_node *irn = (ir_node *) li->irn;
+		if(live_is_end(li) && arch_irn_consider_in_reg_alloc(arch_env, cls, irn))
+			pset_insert_ptr(live, irn);
+	}
+
+	sched_foreach_reverse(bl, irn) {
+		int i, n;
+		ir_node *x;
 
-	return 1;
+		/*
+		 * If we encounter the node we want to insert the Perm after,
+		* exit immediately, so that this node is still live
+		*/
+		if(irn == pos)
+			return live;
+
+		DBG((dbg, LEVEL_1, "%+F\n", irn));
+		for(x = pset_first(live); x; x = pset_next(live))
+			DBG((dbg, LEVEL_1, "\tlive: %+F\n", x));
+
+		if(arch_irn_consider_in_reg_alloc(arch_env, cls, irn))
+			pset_remove_ptr(live, irn);
+
+		for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
+			ir_node *op = get_irn_n(irn, i);
+
+			if(arch_irn_consider_in_reg_alloc(arch_env, cls, op))
+				pset_insert_ptr(live, op);
+		}
+	}
+
+	return live;
 }
 
-ir_node *insert_Perm_after(const be_main_env_t *env,
+ir_node *insert_Perm_after(const arch_env_t *arch_env,
 						   const arch_register_class_t *cls,
 						   dom_front_info_t *dom_front,
 						   ir_node *pos)
 {
-  const arch_env_t *arch_env  = env->arch_env;
-  ir_node *bl                 = is_Block(pos) ? pos : get_nodes_block(pos);
-  ir_graph *irg               = get_irn_irg(bl);
-  pset *live                  = put_live_end(bl, pset_new_ptr_default());
-  firm_dbg_module_t *dbg      = firm_dbg_register("firm.be.node");
+	ir_node *bl                 = is_Block(pos) ? pos : get_nodes_block(pos);
+	ir_graph *irg               = get_irn_irg(bl);
+	pset *live                  = pset_new_ptr_default();
+	firm_dbg_module_t *dbg      = firm_dbg_register("be.node");
 
-  ir_node *curr, *irn, *perm, **nodes;
-  int i, n;
+	ir_node *curr, *irn, *perm, **nodes;
+	int i, n;
 
-  firm_dbg_set_mask(dbg, DBG_LEVEL);
-  DBG((dbg, LEVEL_1, "Insert Perm after: %+F\n", pos));
+	DBG((dbg, LEVEL_1, "Insert Perm after: %+F\n", pos));
 
-  sched_foreach_reverse(bl, irn) {
-    ir_node *x;
+	if(!nodes_live_at(arch_env, cls, pos, live));
 
-	/*
-	 * If we encounter the node we want to insert the Perm after,
-	 * exit immediately, so that this node is still live
-	 */
-    if(irn == pos)
-      break;
-
-    DBG((dbg, LEVEL_1, "%+F\n", irn));
-    for(x = pset_first(live); x; x = pset_next(live))
-      DBG((dbg, LEVEL_1, "\tlive: %+F\n", x));
-
-    if(arch_irn_has_reg_class(arch_env, irn, -1, cls))
-      pset_remove_ptr(live, irn);
-
-    for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
-      ir_node *op = get_irn_n(irn, i);
-
-      if(arch_irn_has_reg_class(arch_env, op, -1, cls))
-        pset_insert_ptr(live, op);
-    }
-  }
-
-  n = pset_count(live);
-  nodes = malloc(n * sizeof(nodes[0]));
-
-  DBG((dbg, LEVEL_1, "live:\n"));
-  for(irn = pset_first(live), i = 0; irn; irn = pset_next(live), i++) {
-  	DBG((dbg, LEVEL_1, "\t%+F\n", irn));
-    nodes[i] = irn;
-  }
-
-  perm = new_Perm(env->node_factory, cls, irg, bl, n, nodes);
-  sched_add_after(pos, perm);
-  free(nodes);
-
-  curr = perm;
-  for(i = 0; i < n; ++i) {
-    ir_node *copies[1];
-    ir_node *perm_op = get_irn_n(perm, i);
-	const arch_register_t *reg = arch_get_irn_register(arch_env, perm_op);
-
-    ir_mode *mode = get_irn_mode(perm_op);
-    ir_node *proj = new_r_Proj(irg, bl, perm, mode, i);
-    arch_set_irn_register(arch_env, proj, reg);
-
-    sched_add_after(curr, proj);
-    curr = proj;
-
-    copies[0] = proj;
-    be_introduce_copies(dom_front, perm_op, array_size(copies), copies);
-  }
-  return perm;
+	n = pset_count(live);
+
+	if(n == 0)
+		return NULL;
+
+	nodes = malloc(n * sizeof(nodes[0]));
+
+	DBG((dbg, LEVEL_1, "live:\n"));
+	for(irn = pset_first(live), i = 0; irn; irn = pset_next(live), i++) {
+		DBG((dbg, LEVEL_1, "\t%+F\n", irn));
+		nodes[i] = irn;
+	}
+
+	perm = be_new_Perm(cls, irg, bl, n, nodes);
+	sched_add_after(pos, perm);
+	free(nodes);
+
+	curr = perm;
+	for(i = 0; i < n; ++i) {
+		ir_node *copies[2];
+		ir_node *perm_op = get_irn_n(perm, i);
+		const arch_register_t *reg = arch_get_irn_register(arch_env, perm_op);
+
+		ir_mode *mode = get_irn_mode(perm_op);
+		ir_node *proj = new_r_Proj(irg, bl, perm, mode, i);
+		arch_set_irn_register(arch_env, proj, reg);
+
+		sched_add_after(curr, proj);
+		curr = proj;
+
+		copies[0] = perm_op;
+		copies[1] = proj;
+		be_ssa_constr(dom_front, 2, copies);
+	}
+	return perm;
 }