X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fia32%2Fbearch_ia32.c;h=f8bda7c11bb8e77d97759320df9ffba31628de85;hb=cbfbedae75798a9830fb0ef090189345ede85dc8;hp=bdf1589a6176b51adb53c337544ac062821ebae5;hpb=10b57fa67b6df8de4876a8b8ba1720b75ef3ec53;p=libfirm

diff --git a/ir/be/ia32/bearch_ia32.c b/ir/be/ia32/bearch_ia32.c
index bdf1589a6..f8bda7c11 100644
--- a/ir/be/ia32/bearch_ia32.c
+++ b/ir/be/ia32/bearch_ia32.c
@@ -21,6 +21,8 @@
 #include <libcore/lc_opts_enum.h>
 #endif /* WITH_LIBCORE */
 
+#include <math.h>
+
 #include "pseudo_irg.h"
 #include "irgwalk.h"
 #include "irprog.h"
@@ -29,8 +31,8 @@
 #include "ircons.h"
 #include "irgmod.h"
 #include "irgopt.h"
-
-#include "bitset.h"
+#include "irbitset.h"
+#include "pdeq.h"
 #include "debug.h"
 
 #include "../beabi.h"                 /* the general register allocator interface */
@@ -38,6 +40,7 @@
 #include "../belower.h"
 #include "../besched_t.h"
 #include "../be.h"
+#include "../be_t.h"
 #include "bearch_ia32_t.h"
 
 #include "ia32_new_nodes.h"           /* ia32 nodes interface */
@@ -49,6 +52,8 @@
 #include "ia32_optimize.h"
 #include "ia32_x87.h"
 #include "ia32_dbg_stat.h"
+#include "ia32_finish.h"
+#include "ia32_util.h"
 
 #define DEBUG_MODULE "firm.be.ia32.isa"
 
@@ -227,19 +232,29 @@ static const arch_register_t *ia32_get_irn_reg(const void *self, const ir_node *
 }
 
 static arch_irn_class_t ia32_classify(const void *self, const ir_node *irn) {
+	arch_irn_class_t classification = arch_irn_class_normal;
+
 	irn = my_skip_proj(irn);
+
 	if (is_cfop(irn))
-		return arch_irn_class_branch;
-	else if (is_ia32_Cnst(irn))
-		return arch_irn_class_const;
-	else if (is_ia32_Ld(irn))
-		return arch_irn_class_load;
-	else if (is_ia32_St(irn) || is_ia32_Store8Bit(irn))
-		return arch_irn_class_store;
-	else if (is_ia32_irn(irn))
-		return arch_irn_class_normal;
-	else
-		return 0;
+		classification |= arch_irn_class_branch;
+
+	if (! is_ia32_irn(irn))
+		return classification & ~arch_irn_class_normal;
+
+	if (is_ia32_Cnst(irn))
+		classification |= arch_irn_class_const;
+
+	if (is_ia32_Ld(irn))
+		classification |= arch_irn_class_load;
+
+	if (is_ia32_St(irn) || is_ia32_Store8Bit(irn))
+		classification |= arch_irn_class_store;
+
+	if (is_ia32_got_reload(irn))
+		classification |= arch_irn_class_reload;
+
+	return classification;
 }
 
 static arch_irn_flags_t ia32_get_flags(const void *self, const ir_node *irn) {
@@ -257,6 +272,10 @@ static entity *ia32_get_frame_entity(const void *self, const ir_node *irn) {
 	return is_ia32_irn(irn) ? get_ia32_frame_ent(irn) : NULL;
 }
 
+static void ia32_set_frame_entity(const void *self, ir_node *irn, entity *ent) {
+	set_ia32_frame_ent(irn, ent);
+}
+
 static void ia32_set_stack_bias(const void *self, ir_node *irn, int bias) {
 	char buf[64];
 	const ia32_irn_ops_t *ops = self;
@@ -325,7 +344,6 @@ static const arch_register_t *ia32_abi_prologue(void *self, ir_node **mem, pmap
 	ia32_abi_env_t *env              = self;
 
 	if (!env->flags.try_omit_fp) {
-		int reg_size         = get_mode_size_bytes(env->isa->bp->reg_class->mode);
 		ir_node *bl          = get_irg_start_block(env->irg);
 		ir_node *curr_sp     = be_abi_reg_map_get(reg_map, env->isa->sp);
 		ir_node *curr_bp     = be_abi_reg_map_get(reg_map, env->isa->bp);
@@ -384,7 +402,6 @@ static void ia32_abi_epilogue(void *self, ir_node *bl, ir_node **mem, pmap *reg_
 	else {
 		const ia32_isa_t *isa = (ia32_isa_t *)env->isa;
 		ir_mode *mode_bp = env->isa->bp->reg_class->mode;
-		int reg_size     = get_mode_size_bytes(env->isa->bp->reg_class->mode);
 
 		/* gcc always emits a leave at the end of a routine */
 		if (1 || ARCH_AMD(isa->opt_arch)) {
@@ -425,35 +442,39 @@ static void ia32_abi_epilogue(void *self, ir_node *bl, ir_node **mem, pmap *reg_
  */
 static ir_type *ia32_abi_get_between_type(void *self)
 {
+#define IDENT(s) new_id_from_chars(s, sizeof(s)-1)
 	static ir_type *omit_fp_between_type = NULL;
 	static ir_type *between_type         = NULL;
 
 	ia32_abi_env_t *env = self;
 
-	if(!between_type) {
+	if ( !between_type) {
 		entity *old_bp_ent;
 		entity *ret_addr_ent;
 		entity *omit_fp_ret_addr_ent;
 
-		ir_type *old_bp_type   = new_type_primitive(new_id_from_str("bp"), mode_P);
-		ir_type *ret_addr_type = new_type_primitive(new_id_from_str("return_addr"), mode_P);
+		ir_type *old_bp_type   = new_type_primitive(IDENT("bp"), mode_P);
+		ir_type *ret_addr_type = new_type_primitive(IDENT("return_addr"), mode_P);
 
-		between_type           = new_type_class(new_id_from_str("ia32_between_type"));
-		old_bp_ent             = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
-		ret_addr_ent           = new_entity(between_type, new_id_from_str("ret_addr"), ret_addr_type);
+		between_type           = new_type_struct(IDENT("ia32_between_type"));
+		old_bp_ent             = new_entity(between_type, IDENT("old_bp"), old_bp_type);
+		ret_addr_ent           = new_entity(between_type, IDENT("ret_addr"), ret_addr_type);
 
 		set_entity_offset_bytes(old_bp_ent, 0);
 		set_entity_offset_bytes(ret_addr_ent, get_type_size_bytes(old_bp_type));
 		set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
+		set_type_state(between_type, layout_fixed);
 
-		omit_fp_between_type   = new_type_class(new_id_from_str("ia32_between_type_omit_fp"));
-		omit_fp_ret_addr_ent   = new_entity(omit_fp_between_type, new_id_from_str("ret_addr"), ret_addr_type);
+		omit_fp_between_type = new_type_struct(IDENT("ia32_between_type_omit_fp"));
+		omit_fp_ret_addr_ent = new_entity(omit_fp_between_type, IDENT("ret_addr"), ret_addr_type);
 
 		set_entity_offset_bytes(omit_fp_ret_addr_ent, 0);
 		set_type_size_bytes(omit_fp_between_type, get_type_size_bytes(ret_addr_type));
+		set_type_state(omit_fp_between_type, layout_fixed);
 	}
 
 	return env->flags.try_omit_fp ? omit_fp_between_type : between_type;
+#undef IDENT
 }
 
 /**
@@ -466,42 +487,39 @@ static ir_type *ia32_abi_get_between_type(void *self)
  */
 static int ia32_get_op_estimated_cost(const void *self, const ir_node *irn)
 {
-  int cost;
-  switch (get_ia32_irn_opcode(irn)) {
-    case iro_ia32_xDiv:
-    case iro_ia32_DivMod:
-      cost = 8;
-      break;
-
-    case iro_ia32_xLoad:
-    case iro_ia32_l_Load:
-    case iro_ia32_Load:
-    case iro_ia32_Push:
-    case iro_ia32_Pop:
-      cost = 10;
-      break;
-
-    case iro_ia32_xStore:
-    case iro_ia32_l_Store:
-    case iro_ia32_Store:
-    case iro_ia32_Store8Bit:
-      cost = 50;
-      break;
-
-    case iro_ia32_MulS:
-    case iro_ia32_Mul:
-    case iro_ia32_Mulh:
-    case iro_ia32_xMul:
-    case iro_ia32_l_MulS:
-    case iro_ia32_l_Mul:
-      cost = 2;
-      break;
-
-    default:
-      cost = 1;
-  }
-
-  return cost;
+	int cost;
+	ia32_op_type_t op_tp;
+	const ia32_irn_ops_t *ops = self;
+
+	if (is_Proj(irn))
+	  return 0;
+
+	assert(is_ia32_irn(irn));
+
+	cost  = get_ia32_latency(irn);
+	op_tp = get_ia32_op_type(irn);
+
+	if (is_ia32_CopyB(irn)) {
+		cost = 250;
+		if (ARCH_INTEL(ops->cg->arch))
+			cost += 150;
+	}
+	else if (is_ia32_CopyB_i(irn)) {
+		int size = get_tarval_long(get_ia32_Immop_tarval(irn));
+		cost     = 20 + (int)ceil((4/3) * size);
+		if (ARCH_INTEL(ops->cg->arch))
+			cost += 150;
+	}
+	/* in case of address mode operations add additional cycles */
+	else if (op_tp == ia32_AddrModeD || op_tp == ia32_AddrModeS) {
+		/*
+			In case of stack access add 5 cycles (we assume stack is in cache),
+			other memory operations cost 20 cycles.
+		*/
+		cost += is_ia32_use_frame(irn) ? 5 : 20;
+	}
+
+	return cost;
 }
 
 /**
@@ -564,8 +582,8 @@ static arch_inverse_t *ia32_get_inverse(const void *self, const ir_node *irn, in
 			}
 			else {
 				/* normal add: inverse == sub */
-				ir_node  *proj = get_irn_out_edge_first(irn)->src;
-				assert(proj && is_Proj(proj));
+				ir_node *proj = ia32_get_res_proj(irn);
+				assert(proj);
 
 				inverse->nodes[0] = new_rd_ia32_Sub(NULL, irg, block, noreg, noreg, proj, get_irn_n(irn, i ^ 1), nomem);
 				pnc               = pn_ia32_Sub_res;
@@ -583,8 +601,8 @@ static arch_inverse_t *ia32_get_inverse(const void *self, const ir_node *irn, in
 			}
 			else {
 				/* normal sub */
-				ir_node  *proj = get_irn_out_edge_first(irn)->src;
-				assert(proj && is_Proj(proj));
+				ir_node *proj = ia32_get_res_proj(irn);
+				assert(proj);
 
 				if (i == 2) {
 					inverse->nodes[0] = new_rd_ia32_Add(NULL, irg, block, noreg, noreg, proj, get_irn_n(irn, 3), nomem);
@@ -611,16 +629,24 @@ static arch_inverse_t *ia32_get_inverse(const void *self, const ir_node *irn, in
 				inverse->costs   += 1;
 			}
 			break;
-		case iro_ia32_Not:
-			inverse->nodes[0] = new_rd_ia32_Not(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), nomem);
+		case iro_ia32_Not: {
+			ir_node *proj = ia32_get_res_proj(irn);
+			assert(proj);
+
+			inverse->nodes[0] = new_rd_ia32_Not(NULL, irg, block, noreg, noreg, proj, nomem);
 			pnc = pn_ia32_Not_res;
 			inverse->costs   += 1;
 			break;
-		case iro_ia32_Minus:
-			inverse->nodes[0] = new_rd_ia32_Minus(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), nomem);
-			pnc = pn_ia32_Minus_res;
+		}
+		case iro_ia32_Minus: {
+			ir_node *proj = ia32_get_res_proj(irn);
+			assert(proj);
+
+			inverse->nodes[0] = new_rd_ia32_Minus(NULL, irg, block, noreg, noreg, proj, nomem);
+			pnc               = pn_ia32_Minus_res;
 			inverse->costs   += 1;
 			break;
+		}
 		default:
 			/* inverse operation not supported */
 			return NULL;
@@ -632,6 +658,60 @@ static arch_inverse_t *ia32_get_inverse(const void *self, const ir_node *irn, in
 	return inverse;
 }
 
+/**
+ * Check if irn can load it's operand at position i from memory (source addressmode).
+ * @param self   Pointer to irn ops itself
+ * @param irn    The irn to be checked
+ * @param i      The operands position
+ * @return Non-Zero if operand can be loaded
+ */
+static int ia32_possible_memory_operand(const void *self, const ir_node *irn, unsigned int i) {
+	if (! is_ia32_irn(irn)                            ||  /* must be an ia32 irn */
+		get_irn_arity(irn) != 5                       ||  /* must be a binary operation */
+		get_ia32_op_type(irn) != ia32_Normal          ||  /* must not already be a addressmode irn */
+		! (get_ia32_am_support(irn) & ia32_am_Source) ||  /* must be capable of source addressmode */
+        (i != 2 && i != 3)                            ||  /* a "real" operand position must be requested */
+		(i == 2 && ! is_ia32_commutative(irn))        ||  /* if first operand requested irn must be commutative */
+		is_ia32_use_frame(irn))                           /* must not already use frame */
+		return 0;
+
+	return 1;
+}
+
+static void ia32_perform_memory_operand(const void *self, ir_node *irn, ir_node *reload, unsigned int i) {
+	assert(ia32_possible_memory_operand(self, irn, i) && "Cannot perform memory operand change");
+	assert(get_nodes_block(reload) == get_nodes_block(irn) && "Reload must be in same block as irn.");
+
+	if (get_irn_n_edges(reload) > 1)
+		return;
+
+	if (i == 2) {
+		ir_node *tmp = get_irn_n(irn, 3);
+		set_irn_n(irn, 3, get_irn_n(irn, 2));
+		set_irn_n(irn, 2, tmp);
+	}
+
+	set_ia32_am_support(irn, ia32_am_Source);
+	set_ia32_op_type(irn, ia32_AddrModeS);
+	set_ia32_am_flavour(irn, ia32_B);
+	set_ia32_ls_mode(irn, get_irn_mode(reload));
+	set_ia32_frame_ent(irn, be_get_frame_entity(reload));
+	set_ia32_use_frame(irn);
+	set_ia32_got_reload(irn);
+
+	set_irn_n(irn, 0, be_get_Reload_frame(reload));
+	set_irn_n(irn, 4, be_get_Reload_mem(reload));
+
+	/*
+		Input at position one is index register, which is NoReg.
+		We would need cg object to get a real noreg, but we cannot
+		access it from here.
+	 */
+	set_irn_n(irn, 3, get_irn_n(irn, 1));
+
+	DBG_OPT_AM_S(reload, irn);
+}
+
 static const be_abi_callbacks_t ia32_abi_callbacks = {
 	ia32_abi_init,
 	free,
@@ -650,9 +730,12 @@ static const arch_irn_ops_if_t ia32_irn_ops_if = {
 	ia32_classify,
 	ia32_get_flags,
 	ia32_get_frame_entity,
+	ia32_set_frame_entity,
 	ia32_set_stack_bias,
 	ia32_get_inverse,
-	ia32_get_op_estimated_cost
+	ia32_get_op_estimated_cost,
+	ia32_possible_memory_operand,
+	ia32_perform_memory_operand,
 };
 
 ia32_irn_ops_t ia32_irn_ops = {
@@ -673,6 +756,16 @@ ia32_irn_ops_t ia32_irn_ops = {
  *                       |___/
  **************************************************/
 
+static void ia32_kill_convs(ia32_code_gen_t *cg) {
+	ir_node *irn;
+
+	/* BEWARE: the Projs are inserted in the set */
+	foreach_nodeset(cg->kill_conv, irn) {
+		ir_node *in = get_irn_n(get_Proj_pred(irn), 2);
+		edges_reroute(irn, in, cg->birg->irg);
+	}
+}
+
 /**
  * Transforms the standard firm graph into
  * an ia32 firm graph
@@ -685,152 +778,91 @@ static void ia32_prepare_graph(void *self) {
 	FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.transform");
 
 	/* 1st: transform constants and psi condition trees */
-	irg_walk_blkwise_graph(cg->irg, ia32_place_consts_set_modes, ia32_transform_psi_cond_tree, cg);
+	ia32_pre_transform_phase(cg);
 
 	/* 2nd: transform all remaining nodes */
 	ia32_register_transformers();
 	dom = be_compute_dominance_frontiers(cg->irg);
+
+	cg->kill_conv = new_nodeset(5);
 	irg_walk_blkwise_graph(cg->irg, NULL, ia32_transform_node, cg);
+	ia32_kill_convs(cg);
+	del_nodeset(cg->kill_conv);
+
 	be_free_dominance_frontiers(dom);
-	be_dump(cg->irg, "-transformed", dump_ir_block_graph_sched);
+
+	if (cg->dump)
+		be_dump(cg->irg, "-transformed", dump_ir_block_graph_sched);
 
 	/* 3rd: optimize address mode */
 	FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.am");
 	ia32_optimize_addressmode(cg);
-	be_dump(cg->irg, "-am", dump_ir_block_graph_sched);
-	DEBUG_ONLY(cg->mod = old_mod;)
-}
 
-static INLINE int need_constraint_copy(ir_node *irn) {
-	return \
-		! is_ia32_Lea(irn)          && \
-		! is_ia32_Conv_I2I(irn)     && \
-		! is_ia32_Conv_I2I8Bit(irn) && \
-		! is_ia32_CmpCMov(irn)      && \
-		! is_ia32_CmpSet(irn);
+	if (cg->dump)
+		be_dump(cg->irg, "-am", dump_ir_block_graph_sched);
+
+	DEBUG_ONLY(cg->mod = old_mod;)
 }
 
 /**
- * Insert copies for all ia32 nodes where the should_be_same requirement
- * is not fulfilled.
- * Transform Sub into Neg -- Add if IN2 == OUT
+ * Dummy functions for hooks we don't need but which must be filled.
  */
-static void ia32_finish_node(ir_node *irn, void *env) {
-	ia32_code_gen_t            *cg = env;
-	const ia32_register_req_t **reqs;
-	const arch_register_t      *out_reg, *in_reg, *in2_reg;
-	int                         n_res, i;
-	ir_node                    *copy, *in_node, *block, *in2_node;
-	ia32_op_type_t              op_tp;
+static void ia32_before_sched(void *self) {
+}
 
-	if (is_ia32_irn(irn)) {
-		/* AM Dest nodes don't produce any values  */
-		op_tp = get_ia32_op_type(irn);
-		if (op_tp == ia32_AddrModeD)
-			goto end;
-
-		reqs  = get_ia32_out_req_all(irn);
-		n_res = get_ia32_n_res(irn);
-		block = get_nodes_block(irn);
-
-		/* check all OUT requirements, if there is a should_be_same */
-		if ((op_tp == ia32_Normal || op_tp == ia32_AddrModeS) && need_constraint_copy(irn))
-		{
-			for (i = 0; i < n_res; i++) {
-				if (arch_register_req_is(&(reqs[i]->req), should_be_same)) {
-					/* get in and out register */
-					out_reg  = get_ia32_out_reg(irn, i);
-					in_node  = get_irn_n(irn, reqs[i]->same_pos);
-					in_reg   = arch_get_irn_register(cg->arch_env, in_node);
-
-					/* don't copy ignore nodes */
-					if (arch_irn_is(cg->arch_env, in_node, ignore) && is_Proj(in_node))
-						continue;
-
-					/* check if in and out register are equal */
-					if (! REGS_ARE_EQUAL(out_reg, in_reg)) {
-						/* in case of a commutative op: just exchange the in's */
-						/* beware: the current op could be everything, so test for ia32 */
-						/*         commutativity first before getting the second in     */
-						if (is_ia32_commutative(irn)) {
-							in2_node = get_irn_n(irn, reqs[i]->same_pos ^ 1);
-							in2_reg  = arch_get_irn_register(cg->arch_env, in2_node);
-
-							if (REGS_ARE_EQUAL(out_reg, in2_reg)) {
-								set_irn_n(irn, reqs[i]->same_pos, in2_node);
-								set_irn_n(irn, reqs[i]->same_pos ^ 1, in_node);
-							}
-							else
-								goto insert_copy;
-						}
-						else {
-insert_copy:
-							DBG((cg->mod, LEVEL_1, "inserting copy for %+F in_pos %d\n", irn, reqs[i]->same_pos));
-							/* create copy from in register */
-							copy = be_new_Copy(arch_register_get_class(in_reg), cg->irg, block, in_node);
-
-							DBG_OPT_2ADDRCPY(copy);
-
-							/* destination is the out register */
-							arch_set_irn_register(cg->arch_env, copy, out_reg);
-
-							/* insert copy before the node into the schedule */
-							sched_add_before(irn, copy);
-
-							/* set copy as in */
-							set_irn_n(irn, reqs[i]->same_pos, copy);
-						}
-					}
-				}
-			}
-		}
+static void remove_unused_nodes(ir_node *irn, bitset_t *already_visited) {
+	int i;
+	ir_mode *mode;
+	ir_node *mem_proj;
 
-		/* If we have a CondJmp/CmpSet/xCmpSet with immediate, we need to    */
-		/* check if it's the right operand, otherwise we have */
-		/* to change it, as CMP doesn't support immediate as  */
-		/* left operands.                                     */
-		if ((is_ia32_CondJmp(irn) || is_ia32_CmpSet(irn) || is_ia32_xCmpSet(irn)) &&
-			(is_ia32_ImmConst(irn) || is_ia32_ImmSymConst(irn))                   &&
-			op_tp == ia32_AddrModeS)
-		{
-			set_ia32_op_type(irn, ia32_AddrModeD);
-			set_ia32_pncode(irn, get_inversed_pnc(get_ia32_pncode(irn)));
-		}
+	if (is_Block(irn))
+		return;
 
-		/* check if there is a sub which need to be transformed */
-		ia32_transform_sub_to_neg_add(irn, cg);
+	mode = get_irn_mode(irn);
 
-		/* transform a LEA into an Add if possible */
-		ia32_transform_lea_to_add(irn, cg);
-	}
-end:
+	/* check if we already saw this node or the node has more than one user */
+	if (bitset_contains_irn(already_visited, irn) || get_irn_n_edges(irn) > 1)
+		return;
 
-	/* check for peephole optimization */
-	ia32_peephole_optimization(irn, cg);
-}
+	/* mark irn visited */
+	bitset_add_irn(already_visited, irn);
 
-static void ia32_finish_irg_walker(ir_node *block, void *env) {
-	ir_node *irn, *next;
+	/* non-Tuple nodes with one user: ok, return */
+	if (get_irn_n_edges(irn) >= 1 && mode != mode_T)
+		return;
 
-	for (irn = sched_first(block); !sched_is_end(irn); irn = next) {
-		next = sched_next(irn);
-		ia32_finish_node(irn, env);
+	/* tuple node has one user which is not the mem proj-> ok */
+	if (mode == mode_T && get_irn_n_edges(irn) == 1) {
+		mem_proj = ia32_get_proj_for_mode(irn, mode_M);
+		if (! mem_proj)
+			return;
 	}
-}
 
-/**
- * Add Copy nodes for not fulfilled should_be_equal constraints
- */
-static void ia32_finish_irg(ir_graph *irg, ia32_code_gen_t *cg) {
-	irg_block_walk_graph(irg, NULL, ia32_finish_irg_walker, cg);
-}
+	for (i = get_irn_arity(irn) - 1; i >= 0; i--) {
+		ir_node *pred = get_irn_n(irn, i);
 
+		/* do not follow memory edges or we will accidentally remove stores */
+		if (is_Proj(pred) && get_irn_mode(pred) == mode_M)
+			continue;
 
+		set_irn_n(irn, i, new_Bad());
 
-/**
- * Dummy functions for hooks we don't need but which must be filled.
- */
-static void ia32_before_sched(void *self) {
+		/*
+			The current node is about to be removed: if the predecessor
+			has only this node as user, it need to be removed as well.
+		*/
+		if (get_irn_n_edges(pred) <= 1)
+			remove_unused_nodes(pred, already_visited);
+	}
+
+	if (sched_is_scheduled(irn))
+		sched_remove(irn);
+}
+
+static void remove_unused_loads_walker(ir_node *irn, void *env) {
+	bitset_t *already_visited = env;
+	if (is_ia32_Ld(irn) && ! bitset_contains_irn(already_visited, irn))
+		remove_unused_nodes(irn, env);
 }
 
 /**
@@ -839,9 +871,19 @@ static void ia32_before_sched(void *self) {
  * simulator and the emitter.
  */
 static void ia32_before_ra(void *self) {
-	ia32_code_gen_t *cg = self;
+	ia32_code_gen_t *cg              = self;
+	bitset_t        *already_visited = bitset_irg_malloc(cg->irg);
 
 	cg->blk_sched = sched_create_block_schedule(cg->irg);
+
+	/*
+		Handle special case:
+		There are sometimes unused loads, only pinned by memory.
+		We need to remove those Loads and all other nodes which won't be used
+		after removing the Load from schedule.
+	*/
+	irg_walk_graph(cg->irg, remove_unused_loads_walker, NULL, already_visited);
+	bitset_free(already_visited);
 }
 
 
@@ -953,6 +995,125 @@ static void transform_to_Store(ia32_transform_env_t *env) {
 	exchange(irn, proj);
 }
 
+static ir_node *create_push(ia32_transform_env_t *env, ir_node *schedpoint, ir_node *sp, ir_node *mem, entity *ent, const char *offset) {
+	ir_node *noreg = ia32_new_NoReg_gp(env->cg);
+
+	ir_node *push = new_rd_ia32_Push(env->dbg, env->irg, env->block, sp, noreg, mem);
+
+	set_ia32_frame_ent(push, ent);
+	set_ia32_use_frame(push);
+	set_ia32_op_type(push, ia32_AddrModeS);
+	set_ia32_am_flavour(push, ia32_B);
+	set_ia32_ls_mode(push, mode_Is);
+	if(offset != NULL)
+		add_ia32_am_offs(push, offset);
+
+	sched_add_before(schedpoint, push);
+	return push;
+}
+
+static ir_node *create_pop(ia32_transform_env_t *env, ir_node *schedpoint, ir_node *sp, entity *ent, const char *offset) {
+	ir_node *pop = new_rd_ia32_Pop(env->dbg, env->irg, env->block, sp, new_NoMem());
+
+	set_ia32_frame_ent(pop, ent);
+	set_ia32_use_frame(pop);
+	set_ia32_op_type(pop, ia32_AddrModeD);
+	set_ia32_am_flavour(pop, ia32_B);
+	set_ia32_ls_mode(pop, mode_Is);
+	if(offset != NULL)
+		add_ia32_am_offs(pop, offset);
+
+	sched_add_before(schedpoint, pop);
+
+	return pop;
+}
+
+static ir_node* create_spproj(ia32_transform_env_t *env, ir_node *pred, ir_node *schedpoint, const ir_node *oldsp) {
+	ir_mode *spmode = get_irn_mode(oldsp);
+	const arch_register_t *spreg = arch_get_irn_register(env->cg->arch_env, oldsp);
+	ir_node *sp;
+
+	sp = new_rd_Proj(env->dbg, env->irg, env->block, pred, spmode, 0);
+	arch_set_irn_register(env->cg->arch_env, sp, spreg);
+	sched_add_before(schedpoint, sp);
+
+	return sp;
+}
+
+static void transform_MemPerm(ia32_transform_env_t *env) {
+	/*
+	 * Transform memperm, currently we do this the ugly way and produce
+	 * push/pop into/from memory cascades. This is possible without using
+	 * any registers.
+	 */
+	ir_node *node = env->irn;
+	int i, arity;
+	ir_node *sp = get_irn_n(node, 0);
+	const ir_edge_t *edge;
+	const ir_edge_t *next;
+	ir_node **pops;
+
+	arity = be_get_MemPerm_entity_arity(node);
+	pops = alloca(arity * sizeof(pops[0]));
+
+	// create pushs
+	for(i = 0; i < arity; ++i) {
+		entity *ent = be_get_MemPerm_in_entity(node, i);
+		ir_type *enttype = get_entity_type(ent);
+		int entbits = get_type_size_bits(enttype);
+		ir_node *mem = get_irn_n(node, i + 1);
+		ir_node *push;
+
+		assert( (entbits == 32 || entbits == 64) && "spillslot on x86 should be 32 or 64 bit");
+
+		push = create_push(env, node, sp, mem, ent, NULL);
+		sp = create_spproj(env, push, node, sp);
+		if(entbits == 64) {
+			// add another push after the first one
+			push = create_push(env, node, sp, mem, ent, "4");
+			sp = create_spproj(env, push, node, sp);
+		}
+
+		set_irn_n(node, i, new_Bad());
+	}
+
+	// create pops
+	for(i = arity - 1; i >= 0; --i) {
+		entity *ent = be_get_MemPerm_out_entity(node, i);
+		ir_type *enttype = get_entity_type(ent);
+		int entbits = get_type_size_bits(enttype);
+
+		ir_node *pop;
+
+		assert( (entbits == 32 || entbits == 64) && "spillslot on x86 should be 32 or 64 bit");
+
+		pop = create_pop(env, node, sp, ent, NULL);
+		if(entbits == 64) {
+			// add another pop after the first one
+			sp = create_spproj(env, pop, node, sp);
+			pop = create_pop(env, node, sp, ent, "4");
+		}
+		if(i != 0) {
+			sp = create_spproj(env, pop, node, sp);
+		}
+
+		pops[i] = pop;
+	}
+
+	// exchange memprojs
+	foreach_out_edge_safe(node, edge, next) {
+		ir_node *proj = get_edge_src_irn(edge);
+		int p = get_Proj_proj(proj);
+
+		assert(p < arity);
+
+		set_Proj_pred(proj, pops[p]);
+		set_Proj_proj(proj, 3);
+	}
+
+	sched_remove(node);
+}
+
 /**
  * Fix the mode of Spill/Reload
  */
@@ -993,12 +1154,18 @@ static void ia32_after_ra_walker(ir_node *block, void *env) {
 			transform_to_Load(&tenv);
 		}
 		else if (be_is_Spill(node)) {
+			ir_node *spillval = get_irn_n(node, be_pos_Spill_val);
 			/* we always spill the whole register  */
 			tenv.dbg  = get_irn_dbg_info(node);
 			tenv.irn  = node;
-			tenv.mode = fix_spill_mode(cg, get_irn_mode(be_get_Spill_context(node)));
+			tenv.mode = fix_spill_mode(cg, get_irn_mode(spillval));
 			transform_to_Store(&tenv);
 		}
+		else if(be_is_MemPerm(node)) {
+			tenv.dbg = get_irn_dbg_info(node);
+			tenv.irn = node;
+			transform_MemPerm(&tenv);
+		}
 	}
 }
 
@@ -1011,6 +1178,7 @@ static void ia32_after_ra_walker(ir_node *block, void *env) {
  */
 static void ia32_after_ra(void *self) {
 	ia32_code_gen_t *cg = self;
+
 	irg_block_walk_graph(cg->irg, NULL, ia32_after_ra_walker, self);
 
 	/* if we do x87 code generation, rewrite all the virtual instructions and registers */
@@ -1019,6 +1187,15 @@ static void ia32_after_ra(void *self) {
 	}
 }
 
+/**
+ * Last touchups for the graph before emit
+ */
+static void ia32_finish(void *self) {
+	ia32_code_gen_t *cg = self;
+	ir_graph        *irg = cg->irg;
+
+	ia32_finish_irg(irg, cg);
+}
 
 /**
  * Emits the code, closes the output file and frees
@@ -1028,8 +1205,6 @@ static void ia32_codegen(void *self) {
 	ia32_code_gen_t *cg = self;
 	ir_graph        *irg = cg->irg;
 
-	ia32_finish_irg(irg, cg);
-	be_dump(irg, "-finished", dump_ir_block_graph_sched);
 	ia32_gen_routine(cg->isa->out, irg, cg);
 
 	cur_reg_set = NULL;
@@ -1040,7 +1215,6 @@ static void ia32_codegen(void *self) {
 	/* de-allocate code generator */
 	del_set(cg->reg_set);
 	free(self);
-
 }
 
 static void *ia32_cg_init(const be_irg_t *birg);
@@ -1052,6 +1226,7 @@ static const arch_code_generator_if_t ia32_code_gen_if = {
 	ia32_before_sched,   /* before scheduling hook */
 	ia32_before_ra,      /* before register allocation hook */
 	ia32_after_ra,       /* after register allocation hook */
+	ia32_finish,         /* called before codegen */
 	ia32_codegen         /* emit && done */
 };
 
@@ -1073,11 +1248,14 @@ static void *ia32_cg_init(const be_irg_t *birg) {
 	cg->gp_to_fp  = NULL;
 	cg->fp_kind   = isa->fp_kind;
 	cg->used_fp   = fp_none;
+	cg->dump      = (birg->main_env->options->dump_flags & DUMP_BE) ? 1 : 0;
 
 	FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.cg");
 
 	/* copy optimizations from isa for easier access */
-	cg->opt = isa->opt;
+	cg->opt      = isa->opt;
+	cg->arch     = isa->arch;
+	cg->opt_arch = isa->opt_arch;
 
 	/* enter it */
 	isa->cg = cg;
@@ -1110,6 +1288,34 @@ static void *ia32_cg_init(const be_irg_t *birg) {
  *
  *****************************************************************/
 
+/**
+ * Set output modes for GCC
+ */
+static const tarval_mode_info mo_integer = {
+	TVO_DECIMAL,
+	NULL,
+	NULL,
+};
+
+/*
+* set the tarval output mode to C-semantics
+*/
+static void set_tarval_output_modes(void)
+{
+	set_tarval_mode_output_option(get_modeLs(), &mo_integer);
+	set_tarval_mode_output_option(get_modeLu(), &mo_integer);
+	set_tarval_mode_output_option(get_modeIs(), &mo_integer);
+	set_tarval_mode_output_option(get_modeIu(), &mo_integer);
+	set_tarval_mode_output_option(get_modeHs(), &mo_integer);
+	set_tarval_mode_output_option(get_modeHu(), &mo_integer);
+	set_tarval_mode_output_option(get_modeBs(), &mo_integer);
+	set_tarval_mode_output_option(get_modeBu(), &mo_integer);
+	set_tarval_mode_output_option(get_modeC(),  &mo_integer);
+	set_tarval_mode_output_option(get_modeU(),  &mo_integer);
+	set_tarval_mode_output_option(get_modeIu(), &mo_integer);
+}
+
+
 /**
  * The template that generates a new ISA object.
  * Note that this template can be changed by command line
@@ -1153,6 +1359,8 @@ static void *ia32_init(FILE *file_handle) {
 	if (inited)
 		return NULL;
 
+	set_tarval_output_modes();
+
 	isa = xmalloc(sizeof(*isa));
 	memcpy(isa, &ia32_isa_template, sizeof(*isa));
 
@@ -1180,14 +1388,14 @@ static void *ia32_init(FILE *file_handle) {
 
 	/* patch register names of x87 registers */
 	if (USE_x87(isa)) {
-	  ia32_st_regs[0].name = "st";
-	  ia32_st_regs[1].name = "st(1)";
-	  ia32_st_regs[2].name = "st(2)";
-	  ia32_st_regs[3].name = "st(3)";
-	  ia32_st_regs[4].name = "st(4)";
-	  ia32_st_regs[5].name = "st(5)";
-	  ia32_st_regs[6].name = "st(6)";
-	  ia32_st_regs[7].name = "st(7)";
+		ia32_st_regs[0].name = "st";
+		ia32_st_regs[1].name = "st(1)";
+		ia32_st_regs[2].name = "st(2)";
+		ia32_st_regs[3].name = "st(3)";
+		ia32_st_regs[4].name = "st(4)";
+		ia32_st_regs[5].name = "st(5)";
+		ia32_st_regs[6].name = "st(6)";
+		ia32_st_regs[7].name = "st(7)";
 	}
 
 #ifndef NDEBUG
@@ -1245,7 +1453,6 @@ static int ia32_get_n_reg_class(const void *self) {
  * Return the register class for index i.
  */
 static const arch_register_class_t *ia32_get_reg_class(const void *self, int i) {
-	const ia32_isa_t *isa = self;
 	assert(i >= 0 && i < 3 && "Invalid ia32 register class requested.");
 	if (i == 0)
 		return &ia32_reg_classes[CLASS_ia32_gp];
@@ -1380,7 +1587,7 @@ const arch_irn_handler_t *ia32_get_irn_handler(const void *self) {
 }
 
 int ia32_to_appear_in_schedule(void *block_env, const ir_node *irn) {
-	return is_ia32_irn(irn);
+	return is_ia32_irn(irn) ? 1 : -1;
 }
 
 /**
@@ -1390,6 +1597,14 @@ static const arch_code_generator_if_t *ia32_get_code_generator_if(void *self) {
 	return &ia32_code_gen_if;
 }
 
+/**
+ * Returns the estimated execution time of an ia32 irn.
+ */
+static sched_timestep_t ia32_sched_exectime(void *env, const ir_node *irn) {
+	const arch_env_t *arch_env = env;
+	return is_ia32_irn(irn) ? ia32_get_op_estimated_cost(arch_get_irn_ops(arch_env, irn), irn) : 1;
+}
+
 list_sched_selector_t ia32_sched_selector;
 
 /**
@@ -1398,6 +1613,7 @@ list_sched_selector_t ia32_sched_selector;
 static const list_sched_selector_t *ia32_get_list_sched_selector(const void *self) {
 //	memcpy(&ia32_sched_selector, reg_pressure_selector, sizeof(list_sched_selector_t));
 	memcpy(&ia32_sched_selector, trivial_selector, sizeof(list_sched_selector_t));
+	ia32_sched_selector.exectime              = ia32_sched_exectime;
 	ia32_sched_selector.to_appear_in_schedule = ia32_to_appear_in_schedule;
 	return &ia32_sched_selector;
 }