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);
+ X(ir_no_alias);
+ X(ir_may_alias);
+ X(ir_sure_alias);
default: assert(0); return "UNKNOWN";
}
#undef X
/**
* Check if a given Const node is greater or equal a given size.
*
- * @return no_alias if the Const is greater, may_alias else
+ * @return ir_no_alias if the Const is greater, ir_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;
+ return tarval_is_null(tv) ? ir_may_alias : ir_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;
+ return tarval_cmp(tv_size, tv) & (pn_Cmp_Eq|pn_Cmp_Lt) ? ir_no_alias : ir_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
+ * @return ir_sure_alias iff idx1 == idx2
+ * ir_no_alias iff they ALWAYS differ more than size
+ * ir_may_alias else
*/
static ir_alias_relation different_index(ir_node *idx1, ir_node *idx2, int size) {
if (idx1 == idx2)
- return sure_alias;
+ return ir_sure_alias;
if (is_Const(idx1) && is_Const(idx2)) {
/* both are const, we can compare them */
tarval *tv1 = get_Const_tarval(idx1);
ir_mode *m1, *m2;
if (size == 0)
- return tv1 == tv2 ? sure_alias : no_alias;
+ return tv1 == tv2 ? ir_sure_alias : ir_no_alias;
/* arg, modes may be different */
m1 = get_tarval_mode(tv1);
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;
+ return ir_may_alias;
}
tv1 = tarval_convert_to(tv1, m1);
} else if (size > 0) {
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;
+ return ir_may_alias;
}
tv2 = tarval_convert_to(tv2, 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;
+ return ir_no_alias;
}
/* tv_size > tv2, so we can subtract without overflow */
- tv2 = tarval_sub(tv_size, tv2);
+ tv2 = tarval_sub(tv_size, tv2, NULL);
/* tv1 is < 0, so we can negate it */
tv1 = tarval_neg(tv1);
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;
+ return tarval_cmp(tv1, tv2) & (pn_Cmp_Eq|pn_Cmp_Gt) ? ir_no_alias : ir_may_alias;
}
}
}
tv2 = t;
}
/* tv1 is now the "smaller" one */
- tv = tarval_sub(tv2, tv1);
+ tv = tarval_sub(tv2, tv1, NULL);
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;
+ return tarval_cmp(tv_size, tv) & (pn_Cmp_Eq|pn_Cmp_Lt) ? ir_no_alias : ir_may_alias;
}
/* Note: we rely here on the fact that normalization puts constants on the RIGHT side */
}
}
- return may_alias;
+ return ir_may_alias;
} /* different_index */
/**
}
}
#endif
- return may_alias;
+ return ir_may_alias;
} /* different_sel_offsets */
/**
if (get_type_tpop(tp1) != get_type_tpop(tp2)) {
/* different type structure */
- return no_alias;
+ return ir_no_alias;
}
if (is_Class_type(tp1)) {
/* check class hierarchy */
if (! is_SubClass_of(tp1, tp2) &&
! is_SubClass_of(tp2, tp1))
- return no_alias;
+ return ir_no_alias;
} else {
/* different types */
- return no_alias;
+ return ir_no_alias;
}
}
}
- return may_alias;
+ return ir_may_alias;
} /* different_types */
-/**
- * Returns non-zero if a node is a routine parameter.
- *
- * @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.
*
return 0;
} /* is_malloc_Result */
-/**
- * classify storage locations.
- * Except STORAGE_CLASS_POINTER they are all disjoint.
- * STORAGE_CLASS_POINTER potentially aliases all classes which don't have a
- * NOTTAKEN modifier.
- */
-typedef enum {
- STORAGE_CLASS_POINTER = 0x0000,
- STORAGE_CLASS_GLOBALVAR = 0x0001,
- STORAGE_CLASS_LOCALVAR = 0x0002,
- STORAGE_CLASS_ARGUMENT = 0x0003,
- STORAGE_CLASS_TLS = 0x0004,
- STORAGE_CLASS_MALLOCED = 0x0005,
-
- STORAGE_CLASS_MODIFIER_NOTTAKEN = 0x1000,
-} storage_class_class_t;
-
/**
* Classify a base pointer.
*
* @param irn the node representing the base address
* @param ent the base entity of the base address iff any
*/
-static storage_class_class_t classify_pointer(ir_graph *irg, ir_node *irn, ir_entity *ent)
+ir_storage_class_class_t classify_pointer(ir_graph *irg, ir_node *irn, ir_entity *ent)
{
- storage_class_class_t res = STORAGE_CLASS_POINTER;
+ ir_storage_class_class_t res = ir_sc_pointer;
if (is_Global(irn)) {
ir_entity *entity = get_Global_entity(irn);
- res = STORAGE_CLASS_GLOBALVAR;
+ res = ir_sc_globalvar;
if (get_entity_address_taken(entity) == ir_address_not_taken)
- res |= STORAGE_CLASS_MODIFIER_NOTTAKEN;
+ res |= ir_sc_modifier_nottaken;
} else if (irn == get_irg_frame(irg)) {
- res = STORAGE_CLASS_LOCALVAR;
+ res = ir_sc_localvar;
if (ent != NULL && get_entity_address_taken(ent) == ir_address_not_taken)
- res |= STORAGE_CLASS_MODIFIER_NOTTAKEN;
+ res |= ir_sc_modifier_nottaken;
} else if (is_arg_Proj(irn)) {
- return STORAGE_CLASS_ARGUMENT;
+ return ir_sc_argument;
} else if (irn == get_irg_tls(irg)) {
- res = STORAGE_CLASS_TLS;
+ res = ir_sc_tls;
if (ent != NULL && get_entity_address_taken(ent) == ir_address_not_taken)
- res |= STORAGE_CLASS_MODIFIER_NOTTAKEN;
+ res |= ir_sc_modifier_nottaken;
} else if (is_Proj(irn) && is_malloc_Result(irn)) {
- return STORAGE_CLASS_MALLOCED;
+ return ir_sc_malloced;
}
return res;
ir_node *orig_adr1 = adr1;
ir_node *orig_adr2 = adr2;
unsigned mode_size;
- storage_class_class_t class1, class2;
+ ir_storage_class_class_t class1, class2;
int have_const_offsets;
if (! get_opt_alias_analysis())
- return may_alias;
+ return ir_may_alias;
if (adr1 == adr2)
- return sure_alias;
+ return ir_sure_alias;
options = get_irg_memory_disambiguator_options(irg);
/* The Armageddon switch */
if (options & aa_opt_no_alias)
- return no_alias;
+ return ir_no_alias;
/* do the addresses have constants offsets?
* Note: nodes are normalized to have constants at right inputs,
*/
if (adr1 == adr2 && have_const_offsets) {
if ((unsigned long)labs(offset2 - offset1) >= mode_size)
- return no_alias;
+ return ir_no_alias;
else
- return sure_alias;
+ return ir_sure_alias;
}
/*
* Bitfields can be constructed as Sels from its base address.
* As they have different entities, the disambiguator would find that they are
- * alias free. While this is true vor it's values, it is false for the addresses
+ * alias free. While this is true for it's values, it is false for the addresses
* (strictly speaking, the Sel's are NOT the addresses of the bitfields).
* So, skip those bitfield selecting Sel's.
*/
/* same base address -> compare sel entities */
if (base1 == base2 && ent1 != NULL && ent2 != NULL) {
if (ent1 != ent2)
- return no_alias;
+ return ir_no_alias;
else if (have_const_offsets)
return different_sel_offsets(adr1, adr2);
}
class1 = classify_pointer(irg, base1, ent1);
class2 = classify_pointer(irg, base2, ent2);
- if (class1 == STORAGE_CLASS_POINTER) {
- if (class2 & STORAGE_CLASS_MODIFIER_NOTTAKEN) {
- return no_alias;
+ if (class1 == ir_sc_pointer) {
+ if (class2 & ir_sc_modifier_nottaken) {
+ return ir_no_alias;
} else {
- return may_alias;
+ return ir_may_alias;
}
- } else if (class2 == STORAGE_CLASS_POINTER) {
- if (class1 & STORAGE_CLASS_MODIFIER_NOTTAKEN) {
- return no_alias;
+ } else if (class2 == ir_sc_pointer) {
+ if (class1 & ir_sc_modifier_nottaken) {
+ return ir_no_alias;
} else {
- return may_alias;
+ return ir_may_alias;
}
}
if (class1 != class2) {
- return no_alias;
+ return ir_no_alias;
}
- if (class1 == STORAGE_CLASS_GLOBALVAR) {
+ if (class1 == ir_sc_globalvar) {
ir_entity *entity1 = get_SymConst_entity(base1);
ir_entity *entity2 = get_SymConst_entity(base2);
if (entity1 != entity2)
- return no_alias;
+ return ir_no_alias;
/* for some reason CSE didn't happen yet for the 2 SymConsts... */
- return may_alias;
+ return ir_may_alias;
}
/* Type based alias analysis */
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 and leave
+ /* One of the modes address a byte. Assume a ir_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;
+ return ir_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;
+ return ir_no_alias;
/* try rule R5 */
rel = different_types(orig_adr1, orig_adr2);
- if (rel != may_alias)
+ if (rel != ir_may_alias)
return rel;
leave_type_based_alias:;
}
/* do we have a language specific memory disambiguator? */
if (language_disambuigator) {
ir_alias_relation rel = (*language_disambuigator)(irg, orig_adr1, mode1, orig_adr2, mode2);
- if (rel != may_alias)
+ if (rel != ir_may_alias)
return rel;
}
/* access points-to information here */
- return may_alias;
+ return ir_may_alias;
} /* _get_alias_relation */
/*
ir_fprintf(stderr, "%+F <-> %+F\n", adr1, adr2);
if (! get_opt_alias_analysis())
- return may_alias;
+ return ir_may_alias;
if (get_irn_opcode(adr1) > get_irn_opcode(adr2)) {
ir_node *t = adr1;
projects / libfirm / blobdiff