/*
- * Project: libFIRM
- * File name: ir/ana/irmemory.c
- * Purpose: Memory disambiguator
- * Author: Michael Beck
- * Modified by:
- * Created: 27.12.2006
- * CVS-ID: $Id$
- * Copyright: (c) 2006-2007 Universität Karlsruhe
- * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ *
+ * This file is part of libFirm.
+ *
+ * This file may be distributed and/or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
+ *
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+
+/**
+ * @file
+ * @brief Memory disambiguator
+ * @author Michael Beck
+ * @date 27.12.2006
+ * @version $Id$
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#include "irouts.h"
#include "irgwalk.h"
#include "irprintf.h"
+#include "debug.h"
+
+/** The debug handle. */
+DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
/** The source language specific language disambiguator function. */
static DISAMBIGUATOR_FUNC language_disambuigator = NULL;
/** The global memory disambiguator options. */
static unsigned global_mem_disamgig_opt = aa_opt_no_opt;
+/* Returns a human readable name for an alias relation. */
+const char *get_ir_alias_relation_name(ir_alias_relation rel) {
+#define X(a) case a: return #a
+ switch (rel) {
+ X(no_alias);
+ X(may_alias);
+ X(sure_alias);
+ default: assert(0); return "UNKNOWN";
+ }
+#undef X
+}
+
/* Get the memory disambiguator options for a graph. */
unsigned get_irg_memory_disambiguator_options(ir_graph *irg) {
unsigned opt = irg->mem_disambig_opt;
} /* find_base_adr */
/**
- * Two address expressions have the same base address,
- * check if there offsets are different.
+ * Check if a given Const node is greater or equal a given size.
+ *
+ * @return no_alias if the Const is greater, may_alias else
+ */
+static ir_alias_relation check_const(ir_node *cns, int size) {
+ tarval *tv = get_Const_tarval(cns);
+ tarval *tv_size;
+
+ if (size == 0)
+ return tarval_is_null(tv) ? may_alias : no_alias;
+ tv_size = new_tarval_from_long(size, get_tarval_mode(tv));
+ return tarval_cmp(tv_size, tv) & (pn_Cmp_Eq|pn_Cmp_Lt) ? no_alias : may_alias;
+} /* check_const */
+
+/**
+ * Treat idx1 and idx2 as integer indexes and check if they differ always more than size.
+ *
+ * @return sure_alias iff idx1 == idx2
+ * no_alias iff they ALWAYS differ more than size
+ * may_alias else
+ */
+static ir_alias_relation different_index(ir_node *idx1, ir_node *idx2, int size) {
+ if (idx1 == idx2)
+ return sure_alias;
+ if (is_Const(idx1) && is_Const(idx2)) {
+ /* both are const, we can compare them */
+ tarval *tv1 = get_Const_tarval(idx1);
+ tarval *tv2 = get_Const_tarval(idx2);
+ tarval *tv, *tv_size;
+ ir_mode *m1, *m2;
+
+ if (size == 0)
+ return tv1 == tv2 ? sure_alias : no_alias;
+
+ /* arg, modes may be different */
+ m1 = get_tarval_mode(tv1);
+ m2 = get_tarval_mode(tv2);
+ if (m1 != m2) {
+ int size = get_mode_size_bits(m1) - get_mode_size_bits(m2);
+
+ if (size < 0) {
+ /* m1 is a small mode, cast up */
+ m1 = mode_is_signed(m1) ? find_signed_mode(m2) : find_unsigned_mode(m2);
+ if (m1 == NULL) {
+ /* should NOT happen, but if it does we give up here */
+ return may_alias;
+ }
+ tv1 = tarval_convert_to(tv1, m1);
+ } else if (size > 0) {
+ /* m2 is a small mode, cast up */
+ m2 = mode_is_signed(m2) ? find_signed_mode(m1) : find_unsigned_mode(m1);
+ if (m2 == NULL) {
+ /* should NOT happen, but if it does we give up here */
+ return may_alias;
+ }
+ tv2 = tarval_convert_to(tv2, m2);
+ }
+ /* here the size should be identical, check for signed */
+ if (get_mode_sign(m1) != get_mode_sign(m2)) {
+ /* find the signed */
+ if (mode_is_signed(m2)) {
+ tarval *t = tv1;
+ ir_mode *tm = m1;
+ tv1 = tv2; m1 = m2;
+ tv2 = t; m2 = tm;
+ }
+
+ /* m1 is now the signed one */
+ if (tarval_cmp(tv1, get_tarval_null(m1)) & (pn_Cmp_Eq|pn_Cmp_Gt)) {
+ /* tv1 is signed, but >= 0, simply cast into unsigned */
+ tv1 = tarval_convert_to(tv1, m2);
+ } else {
+ tv_size = new_tarval_from_long(size, m2);
+
+ if (tarval_cmp(tv2, tv_size) & (pn_Cmp_Eq|pn_Cmp_Gt)) {
+ /* tv1 is negative and tv2 >= tv_size, so the difference is bigger than size */
+ return no_alias;
+ }
+ /* tv_size > tv2, so we can subtract without overflow */
+ tv2 = tarval_sub(tv_size, tv2);
+
+ /* tv1 is < 0, so we can negate it */
+ tv1 = tarval_neg(tv1);
+
+ /* cast it into unsigned. for two-complement it does the right thing for MIN_INT */
+ tv1 = tarval_convert_to(tv1, m2);
+
+ /* now we can compare without overflow */
+ return tarval_cmp(tv1, tv2) & (pn_Cmp_Eq|pn_Cmp_Gt) ? no_alias : may_alias;
+ }
+ }
+ }
+ if (tarval_cmp(tv1, tv2) == pn_Cmp_Gt) {
+ tarval *t = tv1;
+ tv1 = tv2;
+ tv2 = t;
+ }
+ /* tv1 is now the "smaller" one */
+ tv = tarval_sub(tv2, tv1);
+ tv_size = new_tarval_from_long(size, get_tarval_mode(tv));
+ return tarval_cmp(tv_size, tv) & (pn_Cmp_Eq|pn_Cmp_Lt) ? no_alias : may_alias;
+ }
+
+ /* Note: we rely here on the fact that normalization puts constants on the RIGHT side */
+ if (is_Add(idx1)) {
+ ir_node *l1 = get_Add_left(idx1);
+ ir_node *r1 = get_Add_right(idx1);
+
+ if (l1 == idx2) {
+ /* x + c == y */
+ if (is_Const(r1))
+ return check_const(r1, size);
+ }
+ if (is_Add(idx2)) {
+ /* both are Adds, check if they are of x + a == x + b kind */
+ ir_node *l2 = get_Add_left(idx2);
+ ir_node *r2 = get_Add_right(idx2);
+
+ if (l1 == l2)
+ return different_index(r1, r2, size);
+ else if (l1 == r2)
+ return different_index(r1, l2, size);
+ else if (r1 == r2)
+ return different_index(l1, l2, size);
+ else if (r1 == l2)
+ return different_index(l1, r2, size);
+ }
+ }
+ if (is_Add(idx2)) {
+ ir_node *l2 = get_Add_left(idx2);
+ ir_node *r2 = get_Add_right(idx2);
+
+ if (l2 == idx1) {
+ /* x + c == y */
+ if (is_Const(r2))
+ return check_const(r2, size);
+ }
+ }
+
+ if (is_Sub(idx1)) {
+ ir_node *l1 = get_Sub_left(idx1);
+ ir_node *r1 = get_Sub_right(idx1);
+
+ if (l1 == idx2) {
+ /* x - c == y */
+ if (is_Const(r1))
+ return check_const(r1, size);
+ }
+
+ if (is_Sub(idx2)) {
+ /* both are Subs, check if they are of x - a == x - b kind */
+ ir_node *l2 = get_Sub_left(idx2);
+
+ if (l1 == l2) {
+ ir_node *r2 = get_Sub_right(idx2);
+ return different_index(r1, r2, size);
+ }
+ }
+ }
+ if (is_Sub(idx2)) {
+ ir_node *l2 = get_Sub_left(idx2);
+ ir_node *r2 = get_Sub_right(idx2);
+
+ if (l2 == idx1) {
+ /* x - c == y */
+ if (is_Const(r2))
+ return check_const(r2, size);
+ }
+
+ }
+ return may_alias;
+} /* different_index */
+
+/**
+ * Two Sel addresses have the same base address, check if there offsets are different.
*
* @param adr1 The first address.
* @param adr2 The second address.
*/
-static ir_alias_relation different_offsets(ir_node *adr1, ir_node *adr2) {
+static ir_alias_relation different_sel_offsets(ir_node *sel1, ir_node *sel2) {
+ /* seems to be broken */
+ (void) sel1;
+ (void) sel2;
+#if 0
+ ir_entity *ent1 = get_Sel_entity(sel1);
+ ir_entity *ent2 = get_Sel_entity(sel2);
+ int i, check_arr = 0;
+
+ if (ent1 == ent2)
+ check_arr = 1;
+ else {
+ ir_type *tp1 = get_entity_type(ent1);
+ ir_type *tp2 = get_entity_type(ent2);
+
+ if (tp1 == tp2)
+ check_arr = 1;
+ else if (get_type_state(tp1) == layout_fixed && get_type_state(tp2) == layout_fixed &&
+ get_type_size_bits(tp1) == get_type_size_bits(tp2))
+ check_arr = 1;
+ }
+ if (check_arr) {
+ /* we select an entity of same size, check for indexes */
+ int n = get_Sel_n_indexs(sel1);
+ int have_no = 0;
+
+ if (n > 0 && n == get_Sel_n_indexs(sel2)) {
+ /* same non-zero number of indexes, an array access, check */
+ for (i = 0; i < n; ++i) {
+ ir_node *idx1 = get_Sel_index(sel1, i);
+ ir_node *idx2 = get_Sel_index(sel2, i);
+ ir_alias_relation res = different_index(idx1, idx2, 0); /* we can safely IGNORE the size here if it's at least >0 */
+
+ if (res == may_alias)
+ return may_alias;
+ else if (res == no_alias)
+ have_no = 1;
+ }
+ /* if we have at least one no_alias, there is no alias relation, else we have sure */
+ return have_no > 0 ? no_alias : sure_alias;
+ }
+ }
+#endif
return may_alias;
-} /* different_offsets */
+} /* different_sel_offsets */
/**
* Determine the alias relation by checking if adr1 and adr2 are pointer
{
ir_entity *ent1 = NULL, *ent2 = NULL;
- if (is_SymConst(adr1) && get_SymConst_kind(adr1) == symconst_addr_ent)
+ if (is_SymConst_addr_ent(adr1))
ent1 = get_SymConst_entity(adr1);
else if (is_Sel(adr1))
ent1 = get_Sel_entity(adr1);
- if (is_SymConst(adr2) && get_SymConst_kind(adr2) == symconst_addr_ent)
+ if (is_SymConst_addr_ent(adr2))
ent2 = get_SymConst_entity(adr2);
else if (is_Sel(adr2))
ent2 = get_Sel_entity(adr2);
return may_alias;
} /* different_types */
+/**
+ * Check if an offset is a constant and these constant is bigger or equal
+ * than a given size.
+ */
+static int check_const_offset(ir_node *offset, int size) {
+ ir_mode *mode = get_irn_mode(offset);
+
+ /* ok, we found an offset, check for constant */
+ if (is_Const(offset) && mode_is_int(mode)) {
+ tarval *tv = new_tarval_from_long(size, mode);
+
+ /* size <= offset ? */
+ if (tarval_cmp(tv, get_Const_tarval(offset)) & (pn_Cmp_Eq|pn_Cmp_Lt))
+ return 1;
+ }
+ return 0;
+} /* check_const_offset */
+
+/**
+ * Check if we can determine that the two pointers always have an offset bigger then size
+ */
+static ir_alias_relation _different_pointer(ir_node *adr1, ir_node *adr2, int size) {
+ int found = 0;
+
+ if (is_Add(adr1)) {
+ /* first address is the result of a pointer addition */
+ ir_node *l1 = get_Add_left(adr1);
+ ir_node *r1 = get_Add_right(adr1);
+
+ if (l1 == adr2) {
+ found = check_const_offset(r1, size);
+ } else if (r1 == adr2) {
+ found = check_const_offset(l1, size);
+ } else if (is_Add(adr2)) {
+ /* second address is the result of a pointer addition */
+ ir_node *l2 = get_Add_left(adr2);
+ ir_node *r2 = get_Add_right(adr2);
+
+ if (l1 == l2) {
+ return _different_pointer(r1, r2, size);
+ } else if (l1 == r2) {
+ return _different_pointer(r1, l2, size);
+ } else if (r1 == l2) {
+ return _different_pointer(l1, r2, size);
+ } else if (r1 == r2) {
+ return _different_pointer(l1, l2, size);
+ }
+ }
+ } else if (is_Add(adr2)) {
+ /* second address is the result of a pointer addition */
+ ir_node *l2 = get_Add_left(adr2);
+ ir_node *r2 = get_Add_right(adr2);
+
+ if (l2 == adr1) {
+ found = check_const_offset(r2, size);
+ } else if (r2 == adr1) {
+ found = check_const_offset(l2, size);
+ }
+ } else {
+ return different_index(adr1, adr2, size);
+ }
+ return found ? no_alias : may_alias;
+} /* _different_pointer */
+
+/**
+ * Check if we can determine that the two pointers always have an offset bigger then the maximum size of mode1, mode2
+ */
+static ir_alias_relation different_pointer(ir_node *adr1, ir_mode *mode1, ir_node *adr2, ir_mode *mode2) {
+ int size = get_mode_size_bytes(mode1);
+ int n = get_mode_size_bytes(mode2);
+
+ if (n > size)
+ size = n;
+ return _different_pointer(adr1, adr2, size);
+} /* different_pointer */
+
+/**
+ * Returns non-zero if a node is a routine parameter.
+ *
+ * @param node the node to test
+ */
+static int is_arg_Proj(ir_node *node) {
+ if (! is_Proj(node))
+ return 0;
+ node = get_Proj_pred(node);
+ if (! is_Proj(node))
+ return 0;
+ return pn_Start_T_args == get_Proj_proj(node) && is_Start(get_Proj_pred(node));
+} /* is_arg_Proj */
+
+/**
+ * Returns true if an address represents a global variable.
+ *
+ * @param irn the node representing the address
+ */
+static INLINE int is_global_var(ir_node *irn) {
+ return is_SymConst_addr_ent(irn);
+} /* is_global_var */
+
/**
* Determine the alias relation between two addresses.
*/
ir_node *adr1, ir_mode *mode1,
ir_node *adr2, ir_mode *mode2)
{
- opcode op1, op2;
+ ir_opcode op1, op2;
ir_entity *ent1, *ent2;
unsigned options;
/* Two save some code, sort the addresses by its id's. Beware, this
might break some things, so better check here. */
- assert(iro_SymConst < iro_Sel && "Code dependence breaked");
+ assert(iro_SymConst < iro_Sel && iro_Sel < iro_Proj && "Code dependence broken");
op1 = get_irn_opcode(adr1);
op2 = get_irn_opcode(adr2);
mode2 = m;
}
- if (is_SymConst(adr1) && get_SymConst_kind(adr1) == symconst_addr_ent) {
+ if (is_global_var(adr1)) {
/* first address is a global variable */
- if (is_SymConst(adr2) && get_SymConst_kind(adr2) == symconst_addr_ent) {
+ if (is_global_var(adr2)) {
/* both addresses are global variables and we know
they are different (R1 a) */
if (get_SymConst_entity(adr1) != get_SymConst_entity(adr2))
return no_alias;
else {
- /* equal addresses */
+ /* equal entity addresses */
return sure_alias;
}
}
if (is_Sel(adr2)) {
- ir_node *base = find_base_adr(adr2, &ent2);
+ ir_node *base2 = find_base_adr(adr2, &ent2);
- if (is_SymConst(base) && get_SymConst_kind(base) == symconst_addr_ent) {
- /* base address is a global var (R1 a) */
- if (adr1 != base)
+ if (is_global_var(base2)) {
+ /* base2 address is a global var (R1 a) */
+ if (adr1 != base2)
return no_alias;
- if (base == adr1)
- return different_offsets(adr1, adr2);
- } else if (base == get_irg_frame(irg)) {
+ } else if (base2 == get_irg_frame(irg)) {
/* the second one is a local variable so they are always
different (R1 b) */
return no_alias;
- } else if (base == get_irg_tls(irg)) {
+ } else if (base2 == get_irg_tls(irg)) {
/* the second one is a TLS variable so they are always
different (R1 c) */
return no_alias;
ir_node *base1 = find_base_adr(adr1, &ent1);
if (base1 == get_irg_frame(irg)) {
- /* the first is a local variable */
+ /* first is a local variable ent1 */
if (is_Sel(adr2)) {
/* the second address is a Sel */
ir_node *base2 = find_base_adr(adr2, &ent2);
- if (base2 == get_irg_frame(irg)) {
- /* both addresses are local variables and we know
- they are different (R1 a) */
- if (ent1 != ent2)
+ if (base1 == base2) {
+ /* identical bases: both are local variables */
+ if (ent1 != ent2) {
+ /* both addresses are local variables and we know
+ they are different (R1 a) */
return no_alias;
- else
- return different_offsets(adr1, adr2);
+ } else {
+ /* same local var */
+ return different_sel_offsets(adr1, adr2);
+ }
} else if (base2 == get_irg_tls(irg)) {
/* the second one is a TLS variable so they are always
different (R1 d) */
return no_alias;
+ } else if (is_arg_Proj(base2)) {
+ /* the second one is an offset from a parameter so they are
+ always different (R1 e) */
+ return no_alias;
}
+ } else if (is_arg_Proj(adr2)) {
+ /* a local variable and a parameter are always different (R1 e) */
+ return no_alias;
}
} else if (base1 == get_irg_tls(irg)) {
/* the first is a TLS variable */
/* the second address is a Sel */
ir_node *base2 = find_base_adr(adr2, &ent2);
+ if (base1 == base2)
+ if (ent1 != ent2) {
+ /* both addresses are tls variables and we know
+ they are different (R1 a) */
+ } else {
+ /* same tls var */
+ return different_sel_offsets(adr1, adr2);
+ }
+ else if (base2 == get_irg_frame(irg)) {
+ /* the first one is a tls variable, the second a local one,
+ they are different (R1 d) */
+ return no_alias;
+ }
+ }
+ } else if (is_arg_Proj(base1)) {
+ /* the first one is an offset from a parameter */
+ if (is_Sel(adr2)) {
+ /* the second address is a Sel */
+ ir_node *base2 = find_base_adr(adr2, &ent2);
+
if (base2 == get_irg_frame(irg)) {
/* the second one is a local variable so they are always
- different (R1 d) */
+ different (R1 e) */
+ return no_alias;
+ }
+ }
+ } else if (is_global_var(base1)) {
+ /* the first one is a global variable */
+ ent1 = get_SymConst_entity(base1);
+ if (is_Sel(adr2)) {
+ /* the second address is a Sel */
+ ir_node *base2 = find_base_adr(adr2, &ent2);
+
+ if (base1 == base2) {
+ /* same global var */
+ return different_sel_offsets(adr1, adr2);
+ }
+ else if (base2 == get_irg_frame(irg)) {
+ /* the second one is a local variable so they are always
+ different (R1 a) */
return no_alias;
} else if (base2 == get_irg_tls(irg)) {
- /* both addresses are TLS variables and we know
+ /* the second one is a TLS variable so they are always
+ different (R1 a) */
+ return no_alias;
+ } else if (is_arg_Proj(base2)) {
+ if (get_entity_address_taken(ent1) == ir_address_not_taken) {
+ /* The address of the global variable was never taken, so
+ the pointer cannot match (R2). */
+ return no_alias;
+ }
+ } else if (is_global_var(base2)) {
+ ent2 = get_SymConst_entity(base2);
+ /* both addresses are global variables and we know
they are different (R1 a) */
if (ent1 != ent2)
return no_alias;
- else
- return different_offsets(adr1, adr2);
}
}
}
+ } else {
+ /* some pointers, check if they have the same base buf constant offset */
+ ir_alias_relation rel = different_pointer(adr1, mode1, adr2, mode2);
+ if (rel != may_alias)
+ return rel;
}
- if (options & aa_opt_type_based) {
+
+ if (options & aa_opt_type_based) { /* Type based alias analysis */
ir_alias_relation rel;
if (options & aa_opt_byte_type_may_alias) {
if (get_mode_size_bits(mode1) == 8 || get_mode_size_bits(mode2) == 8) {
- /* One of the modes address a byte. Assume a may_alias. */
- return may_alias;
+ /* One of the modes address a byte. Assume a may_alias and leave
+ the type based check. */
+ goto leave_type_based_alias;
}
}
/* cheap check: If the mode sizes did not match, the types MUST be different */
if (get_mode_size_bits(mode1) != get_mode_size_bits(mode2))
return no_alias;
+ /* cheap test: if only one is a reference mode, no alias */
+ if (mode_is_reference(mode1) != mode_is_reference(mode2))
+ return no_alias;
+
/* try rule R5 */
rel = different_types(adr1, adr2);
if (rel != may_alias)
return rel;
+leave_type_based_alias:;
}
/* do we have a language specific memory disambiguator? */
ir_node *adr2, ir_mode *mode2)
{
ir_alias_relation rel = _get_alias_relation(irg, adr1, mode1, adr2, mode2);
+ DB((dbg, LEVEL_1, "alias(%+F, %+f) = %s\n", adr1, adr2, get_ir_alias_relation_name(rel)));
return rel;
} /* get_alias_relation */
static int cmp_mem_disambig_entry(const void *elt, const void *key, size_t size) {
const mem_disambig_entry *p1 = elt;
const mem_disambig_entry *p2 = key;
+ (void) size;
return p1->adr1 == p2->adr1 && p1->adr2 == p2->adr2;
} /* cmp_mem_disambig_entry */
* @param irn the node
*/
static ir_address_taken_state find_address_taken_state(ir_node *irn) {
- int i;
+ int i, j;
ir_mode *emode, *mode;
ir_node *value;
ir_entity *ent;
case iro_Call:
/* Only the call address is not an address taker but
this is an uninteresting case, so we ignore it here. */
- return ir_address_taken;
+ for (j = get_Call_n_params(succ) - 1; j >= 0; --j) {
+ ir_node *param = get_Call_param(succ, j);
+ if (param == irn)
+ return ir_address_taken;
+ }
+ break;
default:
/* another op, the address may be taken */
analyse_irg_address_taken(irg);
} /* assure_irg_address_taken_computed */
+
/**
* Initialize the address_taken flag for a global type like type.
*/
}
} /* init_taken_flag */
+/**
+ * Mark all entities used in the initializer for the given entity as address taken
+ */
+static void check_initializer(ir_entity *ent) {
+ ir_node *n;
+ int i;
+
+ /* do not check uninitialized values */
+ if (get_entity_variability(ent) == variability_uninitialized)
+ return;
+
+ /* Beware: Methods initialized with "themself". This does not count as a taken
+ address. */
+ if (is_Method_type(get_entity_type(ent)))
+ return;
+
+ if (is_atomic_entity(ent)) {
+ /* let's check if it's an address */
+ n = get_atomic_ent_value(ent);
+ if (is_SymConst_addr_ent(n)) {
+ ir_entity *ent = get_SymConst_entity(n);
+ set_entity_address_taken(ent, ir_address_taken);
+ }
+ } else {
+ for (i = get_compound_ent_n_values(ent) - 1; i >= 0; --i) {
+ n = get_compound_ent_value(ent, i);
+
+ /* let's check if it's an address */
+ if (is_SymConst_addr_ent(n)) {
+ ir_entity *ent = get_SymConst_entity(n);
+ set_entity_address_taken(ent, ir_address_taken);
+ }
+ }
+ }
+} /* check_initializer */
+
+
+/**
+ * Mark all entities used in initializers as address taken
+ */
+static void check_initializers(ir_type *tp) {
+ int i;
+
+ for (i = get_compound_n_members(tp) - 1; i >= 0; --i) {
+ ir_entity *ent = get_compound_member(tp, i);
+
+ check_initializer(ent);
+ }
+} /* check_initializers */
+
+#ifdef DEBUG_libfirm
/**
* Print the address taken state of all entities of a given type for debugging.
*/
ir_address_taken_state state = get_entity_address_taken(ent);
if (state != ir_address_not_taken) {
- assert(ir_address_not_taken <= state && state <= ir_address_taken);
+ assert(ir_address_not_taken <= (int) state && state <= ir_address_taken);
ir_printf("%+F: %s\n", ent, get_address_taken_state_name(state));
}
}
} /* print_address_taken_state */
+#endif /* DEBUG_libfirm */
/**
* Post-walker: check for global entity address
ir_entity *ent;
ir_address_taken_state state;
- if (is_SymConst(irn) && get_SymConst_kind(irn) == symconst_addr_ent) {
+ if (is_SymConst_addr_ent(irn)) {
/* A global. */
ent = get_SymConst_entity(irn);
} else if (is_Sel(irn) && get_Sel_ptr(irn) == tls) {
/* A TLS variable. */
- ent = get_SymConst_entity(irn);
+ ent = get_Sel_entity(irn);
} else
return;
- if (get_entity_address_taken(ent) == ir_address_not_taken) {
+ if (get_entity_address_taken(ent) >= ir_address_taken) {
/* Already at the maximum. */
return;
}
static void analyse_irp_globals_address_taken(void) {
int i;
+ FIRM_DBG_REGISTER(dbg, "firm.ana.irmemory");
+
init_taken_flag(get_glob_type());
init_taken_flag(get_tls_type());
+ check_initializers(get_glob_type());
+ check_initializers(get_tls_type());
+
for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
ir_graph *irg = get_irp_irg(i);
assure_irg_outs(irg);
irg_walk_graph(irg, NULL, check_global_address, get_irg_tls(irg));
}
- //print_address_taken_state(get_glob_type());
- //print_address_taken_state(get_tls_type());
+
+#ifdef DEBUG_libfirm
+ if (firm_dbg_get_mask(dbg) & LEVEL_1) {
+ print_address_taken_state(get_glob_type());
+ print_address_taken_state(get_tls_type());
+ }
+#endif /* DEBUG_libfirm */
/* now computed */
irp->globals_adr_taken_state = ir_address_taken_computed;
if (irp->globals_adr_taken_state == ir_address_taken_not_computed)
analyse_irp_globals_address_taken();
} /* assure_irp_globals_address_taken_computed */
+
+
+#include <adt/pmap.h>
+#include "typerep.h"
+
+DEBUG_ONLY(static firm_dbg_module_t *dbgcall = NULL;)
+
+/** Maps method types to cloned method types. */
+static pmap *mtp_map;
+
+/**
+ * Clone a method type if not already cloned.
+ */
+static ir_type *clone_type_and_cache(ir_type *tp) {
+ static ident *prefix = NULL;
+ ir_type *res;
+ pmap_entry *e = pmap_find(mtp_map, tp);
+
+ if (e)
+ return e->value;
+
+ if (prefix == NULL)
+ prefix = new_id_from_chars("C", 1);
+
+ res = clone_type_method(tp, prefix);
+ pmap_insert(mtp_map, tp, res);
+ DB((dbgcall, LEVEL_2, "cloned type %+F into %+F\n", tp, res));
+
+ return res;
+} /* clone_type_and_cache */
+
+/**
+ * Copy the calling conventions from the entities to the call type.
+ */
+static void update_calls_to_private(ir_node *call, void *env) {
+ (void) env;
+ if (is_Call(call)) {
+ ir_node *ptr = get_Call_ptr(call);
+
+ if (is_SymConst(ptr)) {
+ ir_entity *ent = get_SymConst_entity(ptr);
+ ir_type *ctp = get_Call_type(call);
+
+ if (get_entity_additional_properties(ent) & mtp_property_private) {
+ if ((get_method_additional_properties(ctp) & mtp_property_private) == 0) {
+ ctp = clone_type_and_cache(ctp);
+ set_method_additional_property(ctp, mtp_property_private);
+ set_Call_type(call, ctp);
+ DB((dbgcall, LEVEL_1, "changed call to private method %+F\n", ent));
+ }
+ }
+ }
+ }
+} /* update_calls_to_private */
+
+/* Mark all private methods, i.e. those of which all call sites are known. */
+void mark_private_methods(void) {
+ int i;
+ int changed = 0;
+
+ FIRM_DBG_REGISTER(dbgcall, "firm.opt.cc");
+
+ assure_irp_globals_address_taken_computed();
+
+ mtp_map = pmap_create();
+
+ /* first step: change the calling conventions of the local non-escaped entities */
+ for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
+ ir_graph *irg = get_irp_irg(i);
+ ir_entity *ent = get_irg_entity(irg);
+ ir_address_taken_state state = get_entity_address_taken(ent);
+
+ if (get_entity_visibility(ent) == visibility_local &&
+ state == ir_address_not_taken) {
+ ir_type *mtp = get_entity_type(ent);
+
+ set_entity_additional_property(ent, mtp_property_private);
+ DB((dbgcall, LEVEL_1, "found private method %+F\n", ent));
+ if ((get_method_additional_properties(mtp) & mtp_property_private) == 0) {
+ /* need a new type */
+ mtp = clone_type_and_cache(mtp);
+ set_entity_type(ent, mtp);
+ set_method_additional_property(mtp, mtp_property_private);
+ changed = 1;
+ }
+ }
+ }
+
+ if (changed)
+ all_irg_walk(NULL, update_calls_to_private, NULL);
+
+ pmap_destroy(mtp_map);
+} /* mark_private_methods */
projects / libfirm / blobdiff