X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Flower%2Flower_intrinsics.c;h=d9cf47e02d89feb42ce804980c7db35cd8c8769d;hb=6571b31236f780199ba476adc33ee23518200497;hp=d73cc8675fff64fd4ed9a261994e99afafc2e407;hpb=eb08138c6b80c169945568e4414f491a9bc20388;p=libfirm

diff --git a/ir/lower/lower_intrinsics.c b/ir/lower/lower_intrinsics.c
index d73cc8675..d9cf47e02 100644
--- a/ir/lower/lower_intrinsics.c
+++ b/ir/lower/lower_intrinsics.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
  *
  * This file is part of libFirm.
  *
@@ -17,20 +17,17 @@
  * PURPOSE.
  */
 
-/*
- * Project:     libFIRM
- * File name:   ir/lower/lower_intrinsics.c
- * Purpose:     lowering of Calls of intrinsic functions
- * Author:      Michael Beck
- * Created:
- * CVS-ID:      $Id$
- * Copyright:   (c) 1998-2005 Universität Karlsruhe
+/**
+ * @file
+ * @brief   lowering of Calls of intrinsic functions
+ * @author  Michael Beck
+ * @version $Id$
  */
-
-#ifdef HAVE_CONFIG_H
 #include "config.h"
-#endif
 
+#include <stdbool.h>
+
+#include "lowering.h"
 #include "irop_t.h"
 #include "irprog_t.h"
 #include "irnode_t.h"
@@ -40,284 +37,1159 @@
 #include "irgmod.h"
 #include "irgopt.h"
 #include "trouts.h"
-#include "lower_intrinsics.h"
+#include "irvrfy.h"
 #include "pmap.h"
-#include "xmalloc.h"
+#include "array_t.h"
+#include "irpass_t.h"
+#include "iropt_dbg.h"
+#include "error.h"
 
-/** Walker environment */
+/** Walker environment. */
 typedef struct _walker_env {
-  pmap     *c_map;              /**< The intrinsic call map. */
-  unsigned nr_of_intrinsics;    /**< statistics */
-  i_instr_record **i_map;       /**< The intrinsic instruction map. */
+	pmap     *c_map;              /**< The intrinsic call map. */
+	unsigned nr_of_intrinsics;    /**< statistics */
+	i_instr_record **i_map;       /**< The intrinsic instruction map. */
 } walker_env_t;
 
 /**
  * walker: call all mapper functions
  */
 static void call_mapper(ir_node *node, void *env) {
-  walker_env_t *wenv = env;
-  ir_op *op = get_irn_op(node);
-
-  if (op == op_Call) {
-    ir_node *symconst;
-    pmap_entry *p;
-    const i_call_record *r;
-    ir_entity *ent;
-
-    symconst = get_Call_ptr(node);
-    if (get_irn_op(symconst) != op_SymConst ||
-        get_SymConst_kind(symconst) != symconst_addr_ent)
-      return;
-
-    ent = get_SymConst_entity(symconst);
-    p   = pmap_find(wenv->c_map, ent);
-
-    if (p) {
-      r = p->value;
-      wenv->nr_of_intrinsics += r->i_mapper(node, r->ctx) ? 1 : 0;
-    }
-  }
-  else {
-    if (0 <= op->code && op->code < ARR_LEN(wenv->i_map)) {
-      const i_instr_record *r = wenv->i_map[op->code];
-      /* run all possible mapper */
-      while (r) {
-        if (r->i_mapper(node, r->ctx)) {
-          ++wenv->nr_of_intrinsics;
-          break;
-        }
-        r = r->link;
-      }
-    }
-  }
-}
+	walker_env_t *wenv = env;
+	ir_op *op = get_irn_op(node);
+
+	if (op == op_Call) {
+		ir_node *symconst;
+		pmap_entry *p;
+		const i_call_record *r;
+		ir_entity *ent;
+
+		symconst = get_Call_ptr(node);
+		if (! is_Global(symconst))
+			return;
+
+		ent = get_Global_entity(symconst);
+		p   = pmap_find(wenv->c_map, ent);
+
+		if (p) {
+			r = p->value;
+			wenv->nr_of_intrinsics += r->i_mapper(node, r->ctx) ? 1 : 0;
+		}
+	} else {
+		if (op->code < (unsigned) ARR_LEN(wenv->i_map)) {
+			const i_instr_record *r = wenv->i_map[op->code];
+			/* run all possible mapper */
+			while (r) {
+				if (r->i_mapper(node, r->ctx)) {
+					++wenv->nr_of_intrinsics;
+					break;
+				}
+				r = r->link;
+			}
+		}
+	}
+}  /* call_mapper */
 
 /* Go through all graphs and map calls to intrinsic functions. */
-unsigned lower_intrinsics(i_record *list, int length) {
-  int            i, n_ops = get_irp_n_opcodes();
-  ir_graph       *irg;
-  pmap           *c_map = pmap_create_ex(length);
-  i_instr_record **i_map;
-  unsigned       nr_of_intrinsics = 0;
-  walker_env_t   wenv;
-
-  /* we use the ir_op generic pointers here */
-  NEW_ARR_A(const i_instr_record *, i_map, n_ops);
-  memset((void *)i_map, 0, sizeof(*i_map) * n_ops);
-
-  /* fill a map for faster search */
-  for (i = length - 1; i >= 0; --i) {
-    if (list[i].i_call.kind == INTRINSIC_CALL) {
-      pmap_insert(c_map, list[i].i_call.i_ent, (void *)&list[i].i_call);
-    }
-    else {
-      ir_op *op = list[i].i_instr.op;
-      assert(0 <= op->code && op->code < ARR_LEN(i_map));
-
-      list[i].i_instr.link = i_map[op->code];
-      i_map[op->code] = &list[i].i_instr;
-    }
-  }
-
-  wenv.c_map = c_map;
-  wenv.i_map = i_map;
-
-  for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
-    irg = get_irp_irg(i);
-
-    wenv.nr_of_intrinsics = 0;
-    irg_walk_graph(irg, NULL, call_mapper, &wenv);
-
-    if (wenv.nr_of_intrinsics) {
-      /* changes detected */
-      set_irg_outs_inconsistent(irg);
-      set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
-
-      /* exception control flow might have changed */
-      set_irg_doms_inconsistent(irg);
-      set_irg_extblk_inconsistent(irg);
-      set_irg_loopinfo_inconsistent(irg);
-
-      /* calls might be removed/added */
-      set_trouts_inconsistent();
-
-      /* optimize it, tuple might be created */
-      local_optimize_graph(irg);
-
-      nr_of_intrinsics += wenv.nr_of_intrinsics;
-    }
-  }
-  pmap_destroy(c_map);
-
-  return nr_of_intrinsics;
+unsigned lower_intrinsics(i_record *list, int length, int part_block_used) {
+	int            i, n_ops = get_irp_n_opcodes();
+	ir_graph       *irg;
+	pmap           *c_map = pmap_create_ex(length);
+	i_instr_record **i_map;
+	unsigned       nr_of_intrinsics = 0;
+	walker_env_t   wenv;
+
+	/* we use the ir_op generic pointers here */
+	NEW_ARR_A(const i_instr_record *, i_map, n_ops);
+	memset((void *)i_map, 0, sizeof(*i_map) * n_ops);
+
+	/* fill a map for faster search */
+	for (i = length - 1; i >= 0; --i) {
+		if (list[i].i_call.kind == INTRINSIC_CALL) {
+			pmap_insert(c_map, list[i].i_call.i_ent, (void *)&list[i].i_call);
+		} else {
+			ir_op *op = list[i].i_instr.op;
+			assert(op->code < (unsigned) ARR_LEN(i_map));
+
+			list[i].i_instr.link = i_map[op->code];
+			i_map[op->code] = &list[i].i_instr;
+		}
+	}
+
+	wenv.c_map = c_map;
+	wenv.i_map = i_map;
+
+	for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
+		irg = get_irp_irg(i);
+
+		if (part_block_used) {
+			ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
+			collect_phiprojs(irg);
+		}
+
+		wenv.nr_of_intrinsics = 0;
+		irg_walk_graph(irg, NULL, call_mapper, &wenv);
+
+		if (part_block_used)
+			ir_free_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
+
+		if (wenv.nr_of_intrinsics > 0) {
+			/* Changes detected: we might have added/removed nodes. */
+			set_irg_outs_inconsistent(irg);
+			set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
+
+			/* Exception control flow might have changed / new block might have added. */
+			set_irg_doms_inconsistent(irg);
+			set_irg_extblk_inconsistent(irg);
+			set_irg_loopinfo_inconsistent(irg);
+
+			/* Calls might be removed/added. */
+			set_trouts_inconsistent();
+
+			/* verify here */
+			irg_verify(irg, VRFY_NORMAL);
+
+			/* Optimize it, tuple might be created. */
+			optimize_graph_df(irg);
+
+			nr_of_intrinsics += wenv.nr_of_intrinsics;
+		}
+	}
+	pmap_destroy(c_map);
+
+	return nr_of_intrinsics;
+}  /* lower_intrinsics */
+
+struct pass_t {
+	ir_prog_pass_t pass;
+
+	int part_block_used;
+	int      length;
+	i_record list[1];
+};
+
+/**
+ * Wrapper for running lower_intrinsics() as an ir_prog pass.
+ */
+static int pass_wrapper(ir_prog *irp, void *context)
+{
+	struct pass_t *pass = context;
+	(void) irp; /* TODO: set current irp, or remove parameter */
+	lower_intrinsics(pass->list, pass->length, pass->part_block_used);
+	/* probably this pass should not run again */
+	return 0;
 }
 
+/**
+ * Creates an ir_prog pass for lower_intrinsics.
+ *
+ * @param name             the name of this pass or NULL
+ * @param list             an array of intrinsic map records
+ * @param length           the length of the array
+ * @param part_block_used  set to true if part_block() must be using during lowering
+ */
+ir_prog_pass_t *lower_intrinsics_pass(
+	const char *name,
+	i_record *list, int length, int part_block_used)
+{
+	struct pass_t *pass = xmalloc(sizeof(*pass) + (length-1) * sizeof(pass->list[0]));
+
+	memcpy(pass->list, list, sizeof(list[0]) * length);
+	pass->length          = length;
+	pass->part_block_used = part_block_used;
+
+	return def_prog_pass_constructor(
+		&pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
+}  /* lower_intrinsics_pass*/
+
+/**
+ * Helper function, replace the call by the given node.
+ *
+ * @param irn      the result node
+ * @param call     the call to replace
+ * @param mem      the new mem result
+ * @param reg_jmp  new regular control flow, if NULL, a Jmp will be used
+ * @param exc_jmp  new exception control flow, if reg_jmp == NULL, a Bad will be used
+ */
+static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp) {
+	ir_node *block = get_nodes_block(call);
+
+	if (reg_jmp == NULL) {
+
+		/* Beware: do we need here a protection against CSE? Better we do it. */
+		int old_cse = get_opt_cse();
+		set_opt_cse(0);
+		reg_jmp = new_r_Jmp(block);
+		set_opt_cse(old_cse);
+		exc_jmp = new_Bad();
+	}
+	irn = new_r_Tuple(block, 1, &irn);
+
+	turn_into_tuple(call, pn_Call_max);
+	set_Tuple_pred(call, pn_Call_M, mem);
+	set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
+	set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
+	set_Tuple_pred(call, pn_Call_T_result, irn);
+	set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
+}  /* replace_call */
+
 /* A mapper for the integer abs. */
-int i_mapper_Abs(ir_node *call, void *ctx) {
-  ir_node *mem   = get_Call_mem(call);
-  ir_node *block = get_nodes_block(call);
-  ir_node *op    = get_Call_param(call, 0);
-  ir_node *irn;
-  dbg_info *dbg  = get_irn_dbg_info(call);
-
-  irn = new_rd_Abs(dbg, current_ir_graph, block, op, get_irn_mode(op));
-  irn = new_Tuple(1, &irn);
-
-  turn_into_tuple(call, pn_Call_max);
-  set_Tuple_pred(call, pn_Call_M_regular, mem);
-  set_Tuple_pred(call, pn_Call_X_except, new_Bad());
-  set_Tuple_pred(call, pn_Call_T_result, irn);
-  set_Tuple_pred(call, pn_Call_M_except, mem);
-  set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
-
-  return 1;
-}
+int i_mapper_abs(ir_node *call, void *ctx) {
+	ir_node *mem   = get_Call_mem(call);
+	ir_node *block = get_nodes_block(call);
+	ir_node *op    = get_Call_param(call, 0);
+	ir_node *irn;
+	dbg_info *dbg  = get_irn_dbg_info(call);
+	(void) ctx;
+
+	irn = new_rd_Abs(dbg, block, op, get_irn_mode(op));
+	DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
+	replace_call(irn, call, mem, NULL, NULL);
+	return 1;
+}  /* i_mapper_abs */
+
+/* A mapper for the integer bswap. */
+int i_mapper_bswap(ir_node *call, void *ctx) {
+	ir_node *mem   = get_Call_mem(call);
+	ir_node *block = get_nodes_block(call);
+	ir_node *op    = get_Call_param(call, 0);
+	ir_type *tp    = get_Call_type(call);
+	dbg_info *dbg  = get_irn_dbg_info(call);
+	ir_node *irn;
+	(void) ctx;
+
+	irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
+	set_irn_pinned(irn, op_pin_state_floats);
+	DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
+	irn = new_r_Proj(block, irn, get_irn_mode(op), pn_Builtin_1_result);
+	replace_call(irn, call, mem, NULL, NULL);
+	return 1;
+}  /* i_mapper_bswap */
 
 /* A mapper for the alloca() function. */
-int i_mapper_Alloca(ir_node *call, void *ctx) {
-  ir_node *mem   = get_Call_mem(call);
-  ir_node *block = get_nodes_block(call);
-  ir_node *op    = get_Call_param(call, 0);
-  ir_node *irn, *exc;
-  dbg_info *dbg  = get_irn_dbg_info(call);
-
-  irn = new_rd_Alloc(dbg, current_ir_graph, block, mem, op, firm_unknown_type, stack_alloc);
-  mem = new_Proj(irn, mode_M, pn_Alloc_M);
-  exc = new_Proj(irn, mode_X, pn_Alloc_X_except);
-  irn = new_Proj(irn, get_modeP_data(), pn_Alloc_res);
-  irn = new_Tuple(1, &irn);
-
-  turn_into_tuple(call, pn_Call_max);
-  set_Tuple_pred(call, pn_Call_M_regular, mem);
-  set_Tuple_pred(call, pn_Call_X_except, exc);
-  set_Tuple_pred(call, pn_Call_T_result, irn);
-  set_Tuple_pred(call, pn_Call_M_except, mem);
-  set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
-
-  return 1;
+int i_mapper_alloca(ir_node *call, void *ctx) {
+	ir_node *mem   = get_Call_mem(call);
+	ir_node *block = get_nodes_block(call);
+	ir_node *op    = get_Call_param(call, 0);
+	ir_node *irn, *exc, *no_exc;
+	dbg_info *dbg  = get_irn_dbg_info(call);
+	(void) ctx;
+
+	if (mode_is_signed(get_irn_mode(op))) {
+		ir_mode *mode = get_irn_mode(op);
+		mode = find_unsigned_mode(mode);
+		if (mode == NULL) {
+			panic("Cannot find unsigned mode for %M", mode);
+		}
+		op = new_rd_Conv(dbg, block, op, mode);
+	}
+
+	irn    = new_rd_Alloc(dbg, block, mem, op, firm_unknown_type, stack_alloc);
+	mem    = new_rd_Proj(dbg, block, irn, mode_M, pn_Alloc_M);
+	no_exc = new_rd_Proj(dbg, block, irn, mode_X, pn_Alloc_X_regular);
+	exc    = new_rd_Proj(dbg, block, irn, mode_X, pn_Alloc_X_except);
+	irn    = new_rd_Proj(dbg, block, irn, get_modeP_data(), pn_Alloc_res);
+
+	DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
+	replace_call(irn, call, mem, no_exc, exc);
+	return 1;
+}  /* i_mapper_alloca */
+
+/* A mapper for the floating point sqrt. */
+int i_mapper_sqrt(ir_node *call, void *ctx) {
+	ir_node *mem;
+	tarval *tv;
+	ir_node *op = get_Call_param(call, 0);
+	(void) ctx;
+
+	if (!is_Const(op))
+		return 0;
+
+	tv = get_Const_tarval(op);
+	if (! tarval_is_null(tv) && !tarval_is_one(tv))
+		return 0;
+
+	mem = get_Call_mem(call);
+
+	/* sqrt(0) = 0, sqrt(1) = 1 */
+	DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
+	replace_call(op, call, mem, NULL, NULL);
+	return 1;
+}  /* i_mapper_sqrt */
+
+/* A mapper for the floating point cbrt. */
+int i_mapper_cbrt(ir_node *call, void *ctx) {
+	ir_node *mem;
+	tarval *tv;
+	ir_node *op = get_Call_param(call, 0);
+	(void) ctx;
+
+	if (!is_Const(op))
+		return 0;
+
+	tv = get_Const_tarval(op);
+	if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
+		return 0;
+
+	mem = get_Call_mem(call);
+
+	/* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
+	DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
+	replace_call(op, call, mem, NULL, NULL);
+	return 1;
+}  /* i_mapper_cbrt */
+
+/* A mapper for the floating point pow. */
+int i_mapper_pow(ir_node *call, void *ctx) {
+	dbg_info *dbg;
+	ir_node *mem;
+	ir_node *left  = get_Call_param(call, 0);
+	ir_node *right = get_Call_param(call, 1);
+	ir_node *block = get_nodes_block(call);
+	ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
+	(void) ctx;
+
+	if (is_Const(left) && is_Const_one(left)) {
+		/* pow (1.0, x) = 1.0 */
+		irn = left;
+	} else if (is_Const(right)) {
+		tarval *tv = get_Const_tarval(right);
+		if (tarval_is_null(tv)) {
+			/* pow(x, 0.0) = 1.0 */
+			ir_mode *mode = get_tarval_mode(tv);
+			irn = new_Const(get_mode_one(mode));
+		} else if (tarval_is_one(tv)) {
+			/* pow(x, 1.0) = x */
+			irn = left;
+		} else if (tarval_is_minus_one(tv)) {
+			/* pow(x, -1.0) = 1/x */
+			irn = NULL;
+		} else
+			return 0;
+	} else {
+		return 0;
+	}
+
+	mem = get_Call_mem(call);
+	dbg = get_irn_dbg_info(call);
+
+	if (irn == NULL) {
+		ir_mode *mode = get_irn_mode(left);
+		ir_node *quot;
+
+		irn  = new_Const(get_mode_one(mode));
+		quot = new_rd_Quot(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
+		mem  = new_r_Proj(block, quot, mode_M, pn_Quot_M);
+		irn  = new_r_Proj(block, quot, mode, pn_Quot_res);
+		reg_jmp = new_r_Proj(block, quot, mode_X, pn_Quot_X_regular);
+		exc_jmp = new_r_Proj(block, quot, mode_X, pn_Quot_X_except);
+	}
+	DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
+	replace_call(irn, call, mem, reg_jmp, exc_jmp);
+	return 1;
+}  /* i_mapper_pow */
+
+/* A mapper for the floating point exp. */
+int i_mapper_exp(ir_node *call, void *ctx) {
+	ir_node *val  = get_Call_param(call, 0);
+	(void) ctx;
+
+	if (is_Const(val) && is_Const_null(val)) {
+		/* exp(0.0) = 1.0 */
+		ir_mode *mode  = get_irn_mode(val);
+		ir_node *irn   = new_Const(get_mode_one(mode));
+		ir_node *mem   = get_Call_mem(call);
+		DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
+		replace_call(irn, call, mem, NULL, NULL);
+		return 1;
+	}
+	return 0;
+}  /* i_mapper_exp */
+
+/**
+ * A mapper for mapping f(0.0) to 0.0.
+ */
+static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason) {
+	ir_node *val  = get_Call_param(call, 0);
+	(void) ctx;
+
+	if (is_Const(val) && is_Const_null(val)) {
+		/* f(0.0) = 0.0 */
+		ir_node *mem = get_Call_mem(call);
+		DBG_OPT_ALGSIM0(call, val, reason);
+		replace_call(val, call, mem, NULL, NULL);
+		return 1;
+	}
+	return 0;
+}  /* i_mapper_zero_to_zero */
+
+/**
+ * A mapper for mapping f(1.0) to 0.0.
+ */
+static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason) {
+	ir_node *val  = get_Call_param(call, 0);
+	(void) ctx;
+
+	if (is_Const(val) && is_Const_one(val)) {
+		/* acos(1.0) = 0.0 */
+		ir_mode *mode  = get_irn_mode(val);
+		ir_node *irn   = new_Const(get_mode_null(mode));
+		ir_node *mem   = get_Call_mem(call);
+		DBG_OPT_ALGSIM0(call, irn, reason);
+		replace_call(irn, call, mem, NULL, NULL);
+		return 1;
+	}
+	return 0;
+}  /* i_mapper_one_to_zero */
+
+/**
+ * A mapper for mapping a functions with the following characteristics:
+ * f(-x)  = f(x).
+ * f(0.0) = 1.0
+ */
+static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason) {
+	ir_node *val  = get_Call_param(call, 0);
+	(void) ctx;
+
+	if (is_strictConv(val)) {
+		ir_node *op = get_Conv_op(val);
+		if (is_Minus(op)) {
+			/* f(-x) = f(x) with strictConv */
+			ir_node *block = get_nodes_block(call);
+			ir_mode *mode  = get_irn_mode(val);
+			dbg_info *dbg  = get_irn_dbg_info(val);
+
+			op = get_Minus_op(op);
+			val = new_rd_Conv(dbg, block, op, mode);
+			if (is_Conv(val)) {
+				/* still a Conv ? */
+				set_Conv_strict(val, 1);
+			}
+			DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
+			set_Call_param(call, 0, val);
+		}
+	} else if (is_Minus(val)) {
+		/* f(-x) = f(x) */
+		val = get_Minus_op(val);
+		DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
+		set_Call_param(call, 0, val);
+	}
+
+	if (is_Const(val) && is_Const_null(val)) {
+		/* f(0.0) = 1.0 */
+		ir_mode *mode  = get_irn_mode(val);
+		ir_node *irn   = new_Const(get_mode_one(mode));
+		ir_node *mem   = get_Call_mem(call);
+		DBG_OPT_ALGSIM0(call, irn, reason);
+		replace_call(irn, call, mem, NULL, NULL);
+		return 1;
+	}
+	return 0;
+}  /* i_mapper_symmetric_zero_to_one */
+
+/* A mapper for the floating point log. */
+int i_mapper_log(ir_node *call, void *ctx) {
+	/* log(1.0) = 0.0 */
+	return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
+}  /* i_mapper_log */
+
+/* A mapper for the floating point sin. */
+int i_mapper_sin(ir_node *call, void *ctx) {
+	/* sin(0.0) = 0.0 */
+	return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
+}  /* i_mapper_sin */
+
+/* A mapper for the floating point cos. */
+int i_mapper_cos(ir_node *call, void *ctx) {
+	/* cos(0.0) = 1.0, cos(-x) = x */
+	return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
+}  /* i_mapper_cos */
+
+/* A mapper for the floating point tan. */
+int i_mapper_tan(ir_node *call, void *ctx) {
+	/* tan(0.0) = 0.0 */
+	return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
+}  /* i_mapper_tan */
+
+/* A mapper for the floating point asin. */
+int i_mapper_asin(ir_node *call, void *ctx) {
+	/* asin(0.0) = 0.0 */
+	return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
+}  /* i_mapper_asin */
+
+/* A mapper for the floating point acos. */
+int i_mapper_acos(ir_node *call, void *ctx) {
+	/* acos(1.0) = 0.0 */
+	return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
+}  /* i_mapper_acos */
+
+/* A mapper for the floating point atan. */
+int i_mapper_atan(ir_node *call, void *ctx) {
+	/* atan(0.0) = 0.0 */
+	return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
+}  /* i_mapper_atan */
+
+/* A mapper for the floating point sinh. */
+int i_mapper_sinh(ir_node *call, void *ctx) {
+	/* sinh(0.0) = 0.0 */
+	return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
+}  /* i_mapper_sinh */
+
+/* A mapper for the floating point cosh. */
+int i_mapper_cosh(ir_node *call, void *ctx) {
+	/* cosh(0.0) = 1.0, cosh(-x) = x */
+	return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
+}  /* i_mapper_cosh */
+
+/* A mapper for the floating point tanh. */
+int i_mapper_tanh(ir_node *call, void *ctx) {
+	/* tanh(0.0) = 0.0 */
+	return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
+}  /* i_mapper_tanh */
+
+/**
+ * Return the const entity that is accessed through the pointer ptr or
+ * NULL if there is no entity (or the entity is not constant).
+ *
+ * @param ptr  the pointer
+ */
+static ir_entity *get_const_entity(ir_node *ptr) {
+	/* FIXME: this cannot handle constant strings inside struct initializers yet */
+	if (is_Global(ptr)) {
+		ir_entity *ent = get_Global_entity(ptr);
+
+		if (get_entity_variability(ent) == variability_constant) {
+			/* a constant entity */
+			return ent;
+		}
+	}
+	return NULL;
+}  /* get_const_entity */
+
+static bool initializer_val_is_null(ir_initializer_t *init)
+{
+	tarval *tv;
+
+	if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
+		return true;
+
+	if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
+		tv = get_initializer_tarval_value(init);
+	} else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
+		ir_node *irn = get_initializer_const_value(init);
+		if (!is_Const(irn))
+			return false;
+		tv = get_Const_tarval(irn);
+	} else {
+		return false;
+	}
+
+	return tarval_is_null(tv);
 }
 
+/**
+ * Calculate the value of strlen if possible.
+ *
+ * @param ent     the entity
+ * @param res_tp  the result type
+ *
+ * @return a Const node containing the strlen() result or NULL
+ *         if the evaluation fails
+ */
+static ir_node *eval_strlen(ir_entity *ent, ir_type *res_tp) {
+	ir_type *tp = get_entity_type(ent);
+	ir_mode *mode;
+	ir_initializer_t *initializer;
+	unsigned          size;
+	unsigned          i;
+
+	if (! is_Array_type(tp))
+		return NULL;
+	tp = get_array_element_type(tp);
+	if (! is_Primitive_type(tp))
+		return NULL;
+	mode = get_type_mode(tp);
+
+	/* FIXME: This is too restrict, as the type char might be more the 8bits */
+	if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
+		return NULL;
+
+	if (!has_entity_initializer(ent)) {
+		int len;
+		int n;
+		int i = -1;
+
+		n = get_compound_ent_n_values(ent);
+		for (i = 0; i < n; ++i) {
+			ir_node *irn = get_compound_ent_value(ent, i);
+
+			if (! is_Const(irn))
+				return NULL;
+
+			if (is_Const_null(irn)) {
+				/* found the length */
+				len = i;
+				break;
+			}
+		}
+		if (len >= 0) {
+			tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
+			return new_Const_type(tv, res_tp);
+		}
+		return NULL;
+	}
+
+	if (!has_entity_initializer(ent))
+		return NULL;
+
+	initializer = get_entity_initializer(ent);
+	if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
+		return NULL;
+
+	size = get_initializer_compound_n_entries(initializer);
+	for (i = 0; i < size; ++i) {
+		ir_initializer_t *val = get_initializer_compound_value(initializer, i);
+		if (initializer_val_is_null(val)) {
+			tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
+			return new_Const_type(tv, res_tp);
+		}
+	}
+
+	return NULL;
+}  /* eval_strlen */
+
+/* A mapper for strlen */
+int i_mapper_strlen(ir_node *call, void *ctx) {
+	ir_node *s     = get_Call_param(call, 0);
+	ir_entity *ent = get_const_entity(s);
+
+	(void) ctx;
+
+	/* FIXME: this cannot handle constant strings inside struct initializers yet */
+	if (ent != NULL) {
+		/* a constant entity */
+		ir_type *tp = get_Call_type(call);
+		ir_node *irn;
+
+		tp  = get_method_res_type(tp, 0);
+		irn = eval_strlen(ent, tp);
+
+		if (irn) {
+			ir_node *mem = get_Call_mem(call);
+			DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
+			replace_call(irn, call, mem, NULL, NULL);
+			return 1;
+		}
+	}
+	return 0;
+}  /* i_mapper_strlen */
+
+/**
+ * Calculate the value of strlen if possible.
+ *
+ * @param left    the left entity
+ * @param right   the right entity
+ * @param res_tp  the result type
+ *
+ * @return a Const node containing the strcmp() result or NULL
+ *         if the evaluation fails
+ */
+static ir_node *eval_strcmp(ir_entity *left, ir_entity *right, ir_type *res_tp) {
+	ir_type *tp;
+	ir_mode *mode;
+	int     i, n, n_r, res;
+
+	tp = get_entity_type(left);
+	if (! is_Array_type(tp))
+		return NULL;
+	tp = get_array_element_type(tp);
+	if (! is_Primitive_type(tp))
+		return NULL;
+	mode = get_type_mode(tp);
+
+	/* FIXME: This is too restrict, as the type char might be more the 8bits */
+	if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
+		return NULL;
+
+	tp = get_entity_type(right);
+	if (! is_Array_type(tp))
+		return NULL;
+	tp = get_array_element_type(tp);
+	if (! is_Primitive_type(tp))
+		return NULL;
+	mode = get_type_mode(tp);
+
+	/* FIXME: This is too restrict, as the type char might be more the 8bits */
+	if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
+		return NULL;
+
+	n   = get_compound_ent_n_values(left);
+	n_r = get_compound_ent_n_values(right);
+	if (n_r < n)
+		n = n_r;
+	for (i = 0; i < n; ++i) {
+		ir_node *irn;
+		long v_l, v_r;
+		tarval *tv;
+
+		irn = get_compound_ent_value(left, i);
+		if (! is_Const(irn))
+			return NULL;
+		tv = get_Const_tarval(irn);
+		v_l = get_tarval_long(tv);
+
+		irn = get_compound_ent_value(right, i);
+		if (! is_Const(irn))
+			return NULL;
+		tv = get_Const_tarval(irn);
+		v_r = get_tarval_long(tv);
+
+		if (v_l < v_r) {
+			res = -1;
+			break;
+		}
+		if (v_l > v_r) {
+			res = +1;
+			break;
+		}
+
+		if (v_l == 0) {
+			res = 0;
+			break;
+		}
+	}
+	if (i < n) {
+		/* we found an end */
+		tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
+		return new_Const_type(tv, res_tp);
+	}
+	return NULL;
+}  /* eval_strcmp */
+
+/**
+ * Checks if an entity represents the empty string.
+ *
+ * @param ent     the entity
+ *
+ * @return non-zero if ent represents the empty string
+ */
+static int is_empty_string(ir_entity *ent) {
+	ir_type          *tp = get_entity_type(ent);
+	ir_mode          *mode;
+	ir_node          *irn;
+	ir_initializer_t *initializer;
+	ir_initializer_t *init0;
+
+	if (! is_Array_type(tp))
+		return 0;
+	tp = get_array_element_type(tp);
+	if (! is_Primitive_type(tp))
+		return 0;
+	mode = get_type_mode(tp);
+
+	/* FIXME: This is too restrict, as the type char might be more the 8bits */
+	if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
+		return 0;
+
+	if (!has_entity_initializer(ent)) {
+		/* code for deprecated compound_graph_path stuff */
+		int n = get_compound_ent_n_values(ent);
+		if (n < 1)
+			return 0;
+		irn = get_compound_ent_value(ent, 0);
+
+		return is_Const(irn) && is_Const_null(irn);
+	}
+
+	initializer = get_entity_initializer(ent);
+	if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
+		return 0;
+
+	if (get_initializer_compound_n_entries(initializer) < 1)
+		return 0;
+
+	init0 = get_initializer_compound_value(initializer, 0);
+	return initializer_val_is_null(init0);
+}  /* is_empty_string */
+
+/* A mapper for strcmp */
+int i_mapper_strcmp(ir_node *call, void *ctx) {
+	ir_node   *left    = get_Call_param(call, 0);
+	ir_node   *right   = get_Call_param(call, 1);
+	ir_node   *irn     = NULL;
+	ir_node   *exc     = NULL;
+	ir_node   *reg     = NULL;
+	ir_type   *call_tp = get_Call_type(call);
+	ir_type   *res_tp  = get_method_res_type(call_tp, 0);
+	ir_entity *ent_l, *ent_r;
+	ir_type   *char_tp;
+	ir_node   *v;
+
+	(void) ctx;
+
+	/* do some type checks first */
+	if (! is_Primitive_type(res_tp))
+		return 0;
+	char_tp = get_method_param_type(call_tp, 0);
+	if (char_tp != get_method_param_type(call_tp, 1))
+		return 0;
+	if (! is_Pointer_type(char_tp))
+		return 0;
+	char_tp = get_pointer_points_to_type(char_tp);
+
+	if (left == right) {
+		/* a strcmp(s, s) ==> 0 */
+		ir_node *mem   = get_Call_mem(call);
+		ir_mode *mode  = get_type_mode(res_tp);
+
+		irn = new_Const(get_mode_null(mode));
+		DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
+		replace_call(irn, call, mem, NULL, NULL);
+		return 1;
+	}
+	ent_l = get_const_entity(left);
+	ent_r = get_const_entity(right);
+
+	if (ent_l != NULL && ent_r != NULL) {
+		/* both entities are const, try to evaluate */
+		irn = eval_strcmp(ent_l, ent_r, res_tp);
+	} else if (ent_l != NULL) {
+		if (is_empty_string(ent_l)) {
+			/* s strcmp("", s) ==> -(*s)*/
+			v = right;
+			goto replace_by_call;
+		}
+	} else if (ent_r != NULL) {
+		if (is_empty_string(ent_r)) {
+			/* s strcmp(s, "") ==> (*s) */
+			ir_node  *mem, *block;
+			dbg_info *dbg;
+			ir_mode  *mode;
+
+			v = left;
+replace_by_call:
+			mem   = get_Call_mem(call);
+			block = get_nodes_block(call);
+			dbg   = get_irn_dbg_info(call);
+			mode  = get_type_mode(char_tp);
+
+			/* replace the strcmp by (*x) */
+			irn = new_rd_Load(dbg, block, mem, v, mode, 0);
+			mem = new_r_Proj(block, irn, mode_M, pn_Load_M);
+			exc = new_r_Proj(block, irn, mode_X, pn_Load_X_except);
+			reg = new_r_Proj(block, irn, mode_X, pn_Load_X_regular);
+			irn = new_r_Proj(block, irn, mode, pn_Load_res);
+
+			/* conv to the result mode */
+			mode = get_type_mode(res_tp);
+			irn  = new_rd_Conv(dbg, block, irn, mode);
+
+			if (v == right) {
+				/* negate in the ("", s) case */
+				irn = new_rd_Minus(dbg, block, irn, mode);
+			}
+		}
+	}
+
+	if (irn != NULL) {
+		ir_node *mem = get_Call_mem(call);
+		DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
+		replace_call(irn, call, mem, reg, exc);
+		return 1;
+	}
+
+	return 0;
+}  /* i_mapper_strcmp */
+
+/* A mapper for strncmp */
+int i_mapper_strncmp(ir_node *call, void *ctx) {
+	ir_node *left  = get_Call_param(call, 0);
+	ir_node *right = get_Call_param(call, 1);
+	ir_node *len   = get_Call_param(call, 2);
+	ir_node *irn;
+	(void) ctx;
+
+	if (left == right || (is_Const(len) && is_Const_null(len))) {
+		/* a strncmp(s, s, len) ==> 0 OR
+		   a strncmp(a, b, 0) ==> 0 */
+		ir_node   *mem     = get_Call_mem(call);
+		ir_node   *adr     = get_Call_ptr(call);
+		ir_entity *ent     = get_SymConst_entity(adr);
+		ir_type   *call_tp = get_entity_type(ent);
+		ir_type   *res_tp  = get_method_res_type(call_tp, 0);
+		ir_mode   *mode    = get_type_mode(res_tp);
+
+		irn = new_Const(get_mode_null(mode));
+		DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
+		replace_call(irn, call, mem, NULL, NULL);
+		return 1;
+	}
+	return 0;
+}  /* i_mapper_strncmp */
+
+/* A mapper for strcpy */
+int i_mapper_strcpy(ir_node *call, void *ctx) {
+	ir_node *dst = get_Call_param(call, 0);
+	ir_node *src = get_Call_param(call, 1);
+	(void) ctx;
+
+	if (dst == src) {
+		/* a strcpy(d, s) ==> d */
+		ir_node *mem = get_Call_mem(call);
+		ir_node *dst = get_Call_param(call, 0);
+
+		DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
+		replace_call(dst, call, mem, NULL, NULL);
+		return 1;
+	}
+	return 0;
+}  /* i_mapper_strcpy */
+
+/* A mapper for memcpy */
+int i_mapper_memcpy(ir_node *call, void *ctx) {
+	ir_node *dst = get_Call_param(call, 0);
+	ir_node *src = get_Call_param(call, 1);
+	ir_node *len = get_Call_param(call, 2);
+	(void) ctx;
+
+	if (dst == src || (is_Const(len) && is_Const_null(len))) {
+		/* a memcpy(d, d, len) ==> d OR
+		   a memcpy(d, s, 0) ==> d */
+		ir_node *mem = get_Call_mem(call);
+
+		DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
+		replace_call(dst, call, mem, NULL, NULL);
+		return 1;
+	}
+	return 0;
+}  /* i_mapper_memcpy */
+
+/* A mapper for mempcpy */
+int i_mapper_mempcpy(ir_node *call, void *ctx) {
+	ir_node *dst = get_Call_param(call, 0);
+	ir_node *src = get_Call_param(call, 1);
+	ir_node *len = get_Call_param(call, 2);
+	(void) ctx;
+
+	if (dst == src || (is_Const(len) && is_Const_null(len))) {
+		/* a memcpy(d, d, len) ==> d + len OR
+		   a memcpy(d, s, 0) ==> d + 0 */
+		dbg_info *dbg = get_irn_dbg_info(call);
+		ir_node *mem  = get_Call_mem(call);
+		ir_node *blk  = get_nodes_block(call);
+		ir_mode *mode = get_irn_mode(dst);
+		ir_node *res  = new_rd_Add(dbg, blk, dst, len, mode);
+
+		DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
+		replace_call(res, call, mem, NULL, NULL);
+		return 1;
+	}
+	return 0;
+}  /* i_mapper_mempcpy */
+
+/* A mapper for memmove */
+int i_mapper_memmove(ir_node *call, void *ctx) {
+	ir_node *dst = get_Call_param(call, 0);
+	ir_node *src = get_Call_param(call, 1);
+	ir_node *len = get_Call_param(call, 2);
+	(void) ctx;
+
+	if (dst == src || (is_Const(len) && is_Const_null(len))) {
+		/* a memmove(d, d, len) ==> d OR
+		   a memmove(d, s, 0) ==> d */
+		ir_node *mem = get_Call_mem(call);
+
+		DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
+		replace_call(dst, call, mem, NULL, NULL);
+		return 1;
+	}
+	return 0;
+}  /* i_mapper_memmove */
+
+/* A mapper for memset */
+int i_mapper_memset(ir_node *call, void *ctx) {
+	ir_node *len = get_Call_param(call, 2);
+	(void) ctx;
+
+	if (is_Const(len) && is_Const_null(len)) {
+		/* a memset(d, C, 0) ==> d */
+		ir_node *mem = get_Call_mem(call);
+		ir_node *dst = get_Call_param(call, 0);
+
+		DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
+		replace_call(dst, call, mem, NULL, NULL);
+		return 1;
+	}
+	return 0;
+}  /* i_mapper_memset */
+
+/* A mapper for memcmp */
+int i_mapper_memcmp(ir_node *call, void *ctx) {
+	ir_node *left  = get_Call_param(call, 0);
+	ir_node *right = get_Call_param(call, 1);
+	ir_node *len   = get_Call_param(call, 2);
+	ir_node *irn;
+	(void) ctx;
+
+	if (left == right || (is_Const(len) && is_Const_null(len))) {
+		/* a memcmp(s, s, len) ==> 0 OR
+		   a memcmp(a, b, 0) ==> 0 */
+		ir_node   *mem     = get_Call_mem(call);
+		ir_node   *adr     = get_Call_ptr(call);
+		ir_entity *ent     = get_SymConst_entity(adr);
+		ir_type   *call_tp = get_entity_type(ent);
+		ir_type   *res_tp  = get_method_res_type(call_tp, 0);
+		ir_mode   *mode    = get_type_mode(res_tp);
+
+		irn = new_Const(get_mode_null(mode));
+		DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
+		replace_call(irn, call, mem, NULL, NULL);
+		return 1;
+	}
+	return 0;
+}  /* i_mapper_memcmp */
+
+/**
+ * Returns the result mode of a node.
+ */
+static ir_mode *get_irn_res_mode(ir_node *node) {
+	switch (get_irn_opcode(node)) {
+	case iro_Load:   return get_Load_mode(node);
+	case iro_Quot:   return get_Quot_resmode(node);
+	case iro_Div:    return get_Div_resmode(node);
+	case iro_Mod:    return get_Mod_resmode(node);
+	case iro_DivMod: return get_DivMod_resmode(node);
+	default: return NULL;
+	}
+}  /* get_irn_res_mode */
+
 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
 
 /* A mapper for mapping unsupported instructions to runtime calls. */
 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) {
-  int i, j, arity, first, n_param, n_res;
-  long n_proj;
-  ir_type *mtp;
-  ir_node *mem, *bl, *call, *addr, *res_proj;
-  ir_node **in;
-  ir_graph *irg;
-  symconst_symbol sym;
-
-  /* check if the result modes match */
-  if (get_irn_mode(node) != rt->mode)
-    return 0;
-
-  arity = get_irn_arity(node);
-  if (arity <= 0)
-    return 0;
-
-  mtp     = get_entity_type(rt->ent);
-  n_param = get_method_n_params(mtp);
-  irg     = current_ir_graph;
-
-  mem = get_irn_n(node, 0);
-  if (get_irn_mode(mem) != mode_M) {
-    mem = new_r_NoMem(irg);
-    first = 0;
-  }
-  else
-    first = 1;
-
-  /* check if the modes of the predecessors match the parameter modes */
-  if (arity - first != n_param)
-    return 0;
-
-  for (i = first, j = 0; i < arity; ++i, ++j) {
-    ir_type *param_tp = get_method_param_type(mtp, j);
-    ir_node *pred = get_irn_n(node, i);
-
-    if (get_type_mode(param_tp) != get_irn_mode(pred))
-      return 0;
-  }
-
-  n_res = get_method_n_ress(mtp);
-
-  /* step 0: calculate the number of needed Proj's */
-  n_proj = 0;
-  n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
-  n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
-  n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
-  n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
-
-  if (n_proj > 0) {
-    if (rt->mode != mode_T) /* must be mode_T */
-      return 0;
-  }
-  else {
-    if (n_res > 0)
-      /* must match */
-      if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
-        return 0;
-  }
-
-  /* ok, when we are here, the number of predecessors match as well as the parameter modes */
-  bl = get_nodes_block(node);
-
-  in = NULL;
-  if (n_param > 0) {
-    NEW_ARR_A(ir_node *, in, n_param);
-    for (i = 0; i < n_param; ++i)
-      in[i] = get_irn_n(node, first + i);
-  }
-
-  /* step 1: create the call */
-  sym.entity_p = rt->ent;
-  addr = new_r_SymConst(irg, bl, sym, symconst_addr_ent);
-  call = new_rd_Call(get_irn_dbg_info(node), irg, bl, mem, addr, n_param, in, mtp);
-  set_irn_pinned(call, get_irn_pinned(node));
-
-  if (n_res > 0)
-    res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
-  else
-    res_proj = NULL;
-
-  if (n_proj > 0) {
-    n_proj += n_res - 1;
-
-    /* we are ready */
-    turn_into_tuple(node, n_proj);
-
-    for (i = 0; i < n_proj; ++i)
-      set_Tuple_pred(node, i, new_r_Bad(irg));
-    if (rt->mem_proj_nr >= 0)
-      set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_regular));
-    if (get_irn_op(mem) != op_NoMem) {
-      /* Exceptions can only be handled with real memory */
-      if (rt->exc_proj_nr >= 0)
-        set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_except));
-      if (rt->exc_mem_proj_nr >= 0)
-        set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_except));
-    }
-
-    if (rt->res_proj_nr >= 0)
-      for (i = 0; i < n_res; ++i)
-        set_Tuple_pred(node, rt->res_proj_nr + i,
-          new_r_Proj(irg, bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
-    return 1;
-  }
-  else {
-    /* only one return value supported */
-    if (n_res > 0) {
-      ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
-
-      res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
-      res_proj = new_r_Proj(irg, bl, res_proj, mode, 0);
-
-      exchange(node, res_proj);
-      return 1;
-    }
-  }
-  /* should not happen */
-  return 0;
-}
+	int i, j, arity, first, n_param, n_res;
+	long n_proj;
+	ir_type *mtp;
+	ir_node *mem, *bl, *call, *addr, *res_proj;
+	ir_node **in;
+	ir_graph *irg;
+	symconst_symbol sym;
+	ir_mode *mode = get_irn_mode(node);
+
+	if (mode != rt->mode)
+		return 0;
+	/* check if the result modes match */
+	if (mode == mode_T && rt->res_mode != NULL) {
+		mode = get_irn_res_mode(node);
+		if (mode != rt->res_mode)
+			return 0;
+	}
+
+	arity = get_irn_arity(node);
+	if (arity <= 0)
+		return 0;
+
+	mtp     = get_entity_type(rt->ent);
+	n_param = get_method_n_params(mtp);
+	irg     = current_ir_graph;
+
+	mem = get_irn_n(node, 0);
+	if (get_irn_mode(mem) != mode_M) {
+		mem = new_r_NoMem(irg);
+		first = 0;
+	} else
+		first = 1;
+
+	/* check if the modes of the predecessors match the parameter modes */
+	if (arity - first != n_param)
+		return 0;
+
+	for (i = first, j = 0; i < arity; ++i, ++j) {
+		ir_type *param_tp = get_method_param_type(mtp, j);
+		ir_node *pred = get_irn_n(node, i);
+
+		if (get_type_mode(param_tp) != get_irn_mode(pred))
+			return 0;
+	}
+
+	n_res = get_method_n_ress(mtp);
+
+	/* step 0: calculate the number of needed Proj's */
+	n_proj = 0;
+	n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
+	n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
+	n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
+	n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
+	n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
+
+	if (n_proj > 0) {
+		if (rt->mode != mode_T) /* must be mode_T */
+			return 0;
+	} else {
+		if (n_res > 0)
+			/* must match */
+			if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
+				return 0;
+	}
+
+	/* ok, when we are here, the number of predecessors match as well as the parameter modes */
+	bl = get_nodes_block(node);
+
+	in = NULL;
+	if (n_param > 0) {
+		NEW_ARR_A(ir_node *, in, n_param);
+		for (i = 0; i < n_param; ++i)
+			in[i] = get_irn_n(node, first + i);
+	}
+
+	/* step 1: create the call */
+	sym.entity_p = rt->ent;
+	addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
+	call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
+	set_irn_pinned(call, get_irn_pinned(node));
+
+	if (n_res > 0)
+		res_proj = new_r_Proj(bl, call, mode_T, pn_Call_T_result);
+	else
+		res_proj = NULL;
+
+	if (n_proj > 0) {
+		n_proj += n_res - 1;
+
+		/* we are ready */
+		turn_into_tuple(node, n_proj);
+
+		for (i = 0; i < n_proj; ++i)
+			set_Tuple_pred(node, i, new_r_Bad(irg));
+		if (rt->mem_proj_nr >= 0)
+			set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(bl, call, mode_M, pn_Call_M));
+		if (!is_NoMem(mem)) {
+			/* Exceptions can only be handled with real memory */
+			if (rt->regular_proj_nr >= 0)
+				set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(bl, call, mode_X, pn_Call_X_regular));
+			if (rt->exc_proj_nr >= 0)
+				set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(bl, call, mode_X, pn_Call_X_except));
+			if (rt->exc_mem_proj_nr >= 0)
+				set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(bl, call, mode_M, pn_Call_M));
+		}
+
+		if (rt->res_proj_nr >= 0)
+			for (i = 0; i < n_res; ++i)
+				set_Tuple_pred(node, rt->res_proj_nr + i,
+				new_r_Proj(bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
+			return 1;
+	} else {
+		/* only one return value supported */
+		if (n_res > 0) {
+			ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
+
+			res_proj = new_r_Proj(bl, call, mode_T, pn_Call_T_result);
+			res_proj = new_r_Proj(bl, res_proj, mode, 0);
+
+			exchange(node, res_proj);
+			return 1;
+		}
+	}
+	/* should not happen */
+	return 0;
+}  /* i_mapper_RuntimeCall */