/*
- * 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.
*
#include "irgwalk.h"
#include "irprintf.h"
#include "debug.h"
+#include "error.h"
/** The debug handle. */
DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
*/
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);
{
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);
/**
* Returns non-zero if a node is a routine parameter.
*
- * @param node the node to test
+ * @param node the Proj 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 non-zero if a node is a result on a malloc-like routine.
+ *
+ * @param node the Proj node to test
+ */
+static int is_malloc_Result(ir_node *node) {
+ node = get_Proj_pred(node);
+ if (! is_Proj(node))
+ return 0;
+ node = get_Proj_pred(node);
+ if (! is_Call(node))
+ return 0;
+ node = get_Call_ptr(node);
+ if (is_SymConst_addr_ent(node)) {
+ ir_entity *ent = get_SymConst_entity(node);
+
+ if (get_entity_additional_properties(ent) & mtp_property_malloc)
+ return 1;
+ return 0;
+ }
+ return 0;
+} /* is_malloc_Result */
+
/**
* 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(irn) && get_SymConst_kind(irn) == symconst_addr_ent;
+ return is_SymConst_addr_ent(irn);
} /* is_global_var */
/**
/* equal entity addresses */
return sure_alias;
}
- }
- if (is_Sel(adr2)) {
+ } else if (is_Sel(adr2)) {
ir_node *base2 = find_base_adr(adr2, &ent2);
if (is_global_var(base2)) {
/* the second one is a TLS variable so they are always
different (R1 c) */
return no_alias;
+ } else if (is_Proj(base2)) {
+ if (is_malloc_Result(base2)) {
+ /* the second one is an offset from a result of a malloc like call, ie.
+ freshly allocated non-aliases heap memory, (R1 f) */
+ return no_alias;
+ }
+ }
+ } else if (is_Proj(adr2)) {
+ if (is_malloc_Result(adr2)) {
+ /* the second one is a result of a malloc like call, ie.
+ freshly allocated non-aliases heap memory, (R1 f) */
+ return no_alias;
}
}
/* 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) */
+ } else if (is_Proj(base2)) {
+ 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_malloc_Result(base2)) {
+ /* the second one is an offset from a result of a malloc like call, ie.
+ freshly allocated non-aliases heap memory (R1 g) */
+ return no_alias;
+ }
+ }
+ } else if (is_Proj(adr2)) {
+ if (is_arg_Proj(adr2)) {
+ /* a local variable and a parameter are always different (R1 e) */
+ return no_alias;
+ } else if (is_malloc_Result(adr2)) {
+ /* the second one is a result of a malloc like call, ie.
+ freshly allocated non-aliases heap memory (R1 g) */
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 (base1 == base2) {
if (ent1 != ent2) {
/* both addresses are tls variables and we know
they are different (R1 a) */
+ return no_alias;
} else {
/* same tls var */
return different_sel_offsets(adr1, adr2);
}
- else if (base2 == get_irg_frame(irg)) {
+ } 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_Proj(base2)) {
+ if (is_malloc_Result(base2)) {
+ /* the second one is an offset from a result of a malloc like call, ie.
+ freshly allocated non-aliases heap memory (R1 h) */
+ 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 e) */
+ } else if (is_Proj(adr2)) {
+ if (is_malloc_Result(adr2)) {
+ /* the second one is an offset from a result of a malloc like call, ie.
+ freshly allocated non-aliases heap memory (R1 h) */
return no_alias;
}
}
+ } else if (is_Proj(base1)) {
+ 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 e) */
+ return no_alias;
+ } else if (is_Proj(base2)) {
+ if (is_malloc_Result(base2)) {
+ /* the second one is an offset from a result of a malloc like call, ie.
+ freshly allocated non-aliases heap memory (R1 í) */
+ return no_alias;
+ }
+ }
+ } else if (is_Proj(adr2)) {
+ if (is_malloc_Result(adr2)) {
+ /* the second one is a malloc like call, ie.
+ freshly allocated non-aliases heap memory (R1 í) */
+ return no_alias;
+ }
+ }
+ }
} else if (is_global_var(base1)) {
- /* the first one is a global variable */
+ /* the first one is an offset from a global variable */
ent1 = get_SymConst_entity(base1);
if (is_Sel(adr2)) {
/* the second address is a Sel */
if (base1 == base2) {
/* same global var */
return different_sel_offsets(adr1, adr2);
- }
- else if (base2 == get_irg_frame(irg)) {
+ } else if (base2 == get_irg_frame(irg)) {
/* the second one is a local variable so they are always
different (R1 a) */
return no_alias;
/* 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). */
+ } else if (is_Proj(base2)) {
+ 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_malloc_Result(base2)) {
+ /* the second one is an offset from a result of a malloc like call, ie.
+ freshly allocated non-aliases heap memory (R1 g) */
return no_alias;
}
} else if (is_global_var(base2)) {
}
}
} else {
+ /* Note: we cannot check for malloc result here, as we cannot be sure the result is not stored anywhere
+ after getting if.
+ */
+
/* 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)
}
} /* init_taken_flag */
+static void check_initializer_nodes(ir_initializer_t *initializer)
+{
+ switch(initializer->kind) {
+ case IR_INITIALIZER_CONST: {
+ ir_node *n = initializer->consti.value;
+
+ /* 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);
+ }
+ return;
+ }
+ case IR_INITIALIZER_TARVAL:
+ case IR_INITIALIZER_NULL:
+ return;
+ case IR_INITIALIZER_COMPOUND: {
+ size_t i;
+
+ for(i = 0; i < initializer->compound.n_initializers; ++i) {
+ ir_initializer_t *sub_initializer
+ = initializer->compound.initializers[i];
+ check_initializer_nodes(sub_initializer);
+ }
+ return;
+ }
+ }
+ panic("invalid initialzier found");
+}
+
/**
* Mark all entities used in the initializer for the given entity as address taken
*/
if (is_Method_type(get_entity_type(ent)))
return;
- if (is_atomic_entity(ent)) {
+ if (ent->has_initializer) {
+ check_initializer_nodes(ent->attr.initializer);
+ } else if (is_atomic_entity(ent)) {
/* let's check if it's an address */
n = get_atomic_ent_value(ent);
- if (is_SymConst(n) && get_SymConst_kind(n) == symconst_addr_ent) {
+ if (is_SymConst_addr_ent(n)) {
ir_entity *ent = get_SymConst_entity(n);
set_entity_address_taken(ent, ir_address_taken);
}
n = get_compound_ent_value(ent, i);
/* let's check if it's an address */
- if (is_SymConst(n) && get_SymConst_kind(n) == symconst_addr_ent) {
+ if (is_SymConst_addr_ent(n)) {
ir_entity *ent = get_SymConst_entity(n);
set_entity_address_taken(ent, ir_address_taken);
}
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) {
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 */
if (is_SymConst(ptr)) {
ir_entity *ent = get_SymConst_entity(ptr);
- ir_type *mtp = get_entity_type(ent);
ir_type *ctp = get_Call_type(call);
- 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));
+ 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));
+ }
}
}
}
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_method_additional_property(mtp, mtp_property_private);
changed = 1;
}
- DB((dbgcall, LEVEL_1, "found private method %+F\n", ent));
}
}
projects / libfirm / blobdiff