return tarval_bad;
}
-/**
- * If the parameter n can be computed, return its value, else tarval_bad.
- * Performs constant folding.
- *
- * GL: Only if n is arithmetic operator?
- */
-tarval *
-computed_value (ir_node *n)
+static tarval *computed_value_Const(ir_node *n)
{
- tarval *res;
+ return get_Const_tarval(n);
+}
- ir_node *a = NULL, *b = NULL; /* initialized to shut up gcc */
- /* initialized to uniformly filter invalid constants */
- tarval *ta = tarval_bad, *tb = tarval_bad;
+static tarval *computed_value_SymConst(ir_node *n)
+{
+ if ((get_SymConst_kind(n) == size) &&
+ (get_type_state(get_SymConst_type(n))) == layout_fixed)
+ return new_tarval_from_long (get_type_size(get_SymConst_type(n)), mode_Is);
+ return tarval_bad;
+}
- res = tarval_bad;
+static tarval *computed_value_Add(ir_node *n)
+{
+ ir_node *a = get_Add_left(n);
+ ir_node *b = get_Add_right(n);
- /* get the operands we will work on for simple cases. */
- if (is_binop(n)) {
- a = get_binop_left(n);
- b = get_binop_right(n);
- } else if (is_unop(n)) {
- a = get_unop_op(n);
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ if ((ta != tarval_bad) && (tb != tarval_bad)
+ && (get_irn_mode(a) == get_irn_mode(b))
+ && !(get_mode_sort(get_irn_mode(a)) == irms_reference)) {
+ return tarval_add(ta, tb);
}
+ return tarval_bad;
+}
- /* if the operands are constants, get the target value, else set it NULL.
- (a and b may be NULL if we treat a node that is no computation.) */
- ta = value_of (a);
- tb = value_of (b);
+static tarval *computed_value_Sub(ir_node *n)
+{
+ ir_node *a = get_Sub_left(n);
+ ir_node *b = get_Sub_right(n);
- /* Perform the constant evaluation / computation. */
- switch (get_irn_opcode(n)) {
- case iro_Const:
- res = get_Const_tarval(n);
- break;
- case iro_SymConst:
- if ((get_SymConst_kind(n) == size) &&
- (get_type_state(get_SymConst_type(n))) == layout_fixed)
- res = new_tarval_from_long (get_type_size(get_SymConst_type(n)), mode_Is);
- break;
- case iro_Add:
- if ((ta != tarval_bad) && (tb != tarval_bad)
- && (get_irn_mode(a) == get_irn_mode(b))
- && !(get_mode_sort(get_irn_mode(a)) == irms_reference)) {
- res = tarval_add (ta, tb);
- }
- break;
- case iro_Sub:
- if ((ta != tarval_bad) && (tb != tarval_bad)
- && (get_irn_mode(a) == get_irn_mode(b))
- && !(get_mode_sort(get_irn_mode(a)) == irms_reference)) {
- res = tarval_sub (ta, tb);
- }
- break;
- case iro_Minus:
- if ((ta != tarval_bad) && mode_is_signed(get_irn_mode(a)))
- res = tarval_neg (ta);
- break;
- case iro_Mul:
- if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
- res = tarval_mul (ta, tb);
- } else {
- /* a*0 = 0 or 0*b = 0:
- calls computed_value recursive and returns the 0 with proper
- mode. */
- tarval *v;
- if ( ( ((v = computed_value (a)) != tarval_bad)
- && (v == get_mode_null(get_tarval_mode(v))) )
- || ( ((v = computed_value (b)) != tarval_bad)
- && (v == get_mode_null(get_tarval_mode(v))) )) {
- res = v;
- }
- }
- break;
- case iro_Quot:
- /* This was missing in original implementation. Why? */
- if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
- if (tb == get_mode_null(get_tarval_mode(tb))) break; /* div by zero: return tarval_bad */
- res = tarval_quo(ta, tb);
- }
- break;
- case iro_Div:
- /* This was missing in original implementation. Why? */
- if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
- if (tb == get_mode_null(get_tarval_mode(tb))) break; /* div by zero: return tarval_bad */
- res = tarval_div(ta, tb);
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ if ((ta != tarval_bad) && (tb != tarval_bad)
+ && (get_irn_mode(a) == get_irn_mode(b))
+ && !(get_mode_sort(get_irn_mode(a)) == irms_reference)) {
+ return tarval_sub(ta, tb);
+ }
+ return tarval_bad;
+}
+
+static tarval *computed_value_Minus(ir_node *n)
+{
+ ir_node *a = get_Minus_op(n);
+ tarval *ta = value_of(a);
+
+ if ((ta != tarval_bad) && mode_is_signed(get_irn_mode(a)))
+ return tarval_neg(ta);
+
+ return tarval_bad;
+}
+
+static tarval *computed_value_Mul(ir_node *n)
+{
+ ir_node *a = get_Mul_left(n);
+ ir_node *b = get_Mul_right(n);
+
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
+ return tarval_mul(ta, tb);
+ } else {
+ /* a*0 = 0 or 0*b = 0:
+ calls computed_value recursive and returns the 0 with proper
+ mode. */
+ tarval *v;
+
+ if ( ( ((v = ta) != tarval_bad)
+ && (v == get_mode_null(get_tarval_mode(v))) )
+ || ( ((v = tb) != tarval_bad)
+ && (v == get_mode_null(get_tarval_mode(v))) )) {
+ return v;
}
- break;
- case iro_Mod:
- /* This was missing in original implementation. Why? */
- if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
- if (tb == get_mode_null(get_tarval_mode(tb))) break; /* div by zero: return tarval_bad */
- res = tarval_mod(ta, tb);
+ }
+ return tarval_bad;
+}
+
+static tarval *computed_value_Quot(ir_node *n)
+{
+ ir_node *a = get_Quot_left(n);
+ ir_node *b = get_Quot_right(n);
+
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ /* This was missing in original implementation. Why? */
+ if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
+ if (tb != get_mode_null(get_tarval_mode(tb))) /* div by zero: return tarval_bad */
+ return tarval_quo(ta, tb);
+ }
+ return tarval_bad;
+}
+
+static tarval *computed_value_Div(ir_node *n)
+{
+ ir_node *a = get_Div_left(n);
+ ir_node *b = get_Div_right(n);
+
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ /* This was missing in original implementation. Why? */
+ if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
+ if (tb != get_mode_null(get_tarval_mode(tb))) /* div by zero: return tarval_bad */
+ return tarval_div(ta, tb);
+ }
+ return tarval_bad;
+}
+
+static tarval *computed_value_Mod(ir_node *n)
+{
+ ir_node *a = get_Mod_left(n);
+ ir_node *b = get_Mod_right(n);
+
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ /* This was missing in original implementation. Why? */
+ if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
+ if (tb != get_mode_null(get_tarval_mode(tb))) /* div by zero: return tarval_bad */
+ return tarval_mod(ta, tb);
+ }
+ return tarval_bad;
+}
+
+static tarval *computed_value_Abs(ir_node *n)
+{
+ ir_node *a = get_Abs_op(n);
+ tarval *ta = value_of(a);
+
+ if (ta != tarval_bad)
+ return tarval_abs(ta);
+
+ return tarval_bad;
+}
+
+static tarval *computed_value_And(ir_node *n)
+{
+ ir_node *a = get_And_left(n);
+ ir_node *b = get_And_right(n);
+
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ if ((ta != tarval_bad) && (tb != tarval_bad)) {
+ return tarval_and (ta, tb);
+ } else {
+ tarval *v;
+
+ if ( (tarval_classify ((v = computed_value (a))) == TV_CLASSIFY_NULL)
+ || (tarval_classify ((v = computed_value (b))) == TV_CLASSIFY_NULL)) {
+ return v;
}
- break;
- /* for iro_DivMod see iro_Proj */
- case iro_Abs:
- if (ta != tarval_bad)
- res = tarval_abs (ta);
- break;
- case iro_And:
- if ((ta != tarval_bad) && (tb != tarval_bad)) {
- res = tarval_and (ta, tb);
- } else {
- tarval *v;
- if ( (tarval_classify ((v = computed_value (a))) == TV_CLASSIFY_NULL)
- || (tarval_classify ((v = computed_value (b))) == TV_CLASSIFY_NULL)) {
- res = v;
- }
+ }
+ return tarval_bad;
+}
+
+static tarval *computed_value_Or(ir_node *n)
+{
+ ir_node *a = get_Or_left(n);
+ ir_node *b = get_Or_right(n);
+
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ if ((ta != tarval_bad) && (tb != tarval_bad)) {
+ return tarval_or (ta, tb);
+ } else {
+ tarval *v;
+ if ( (tarval_classify ((v = computed_value (a))) == TV_CLASSIFY_ALL_ONE)
+ || (tarval_classify ((v = computed_value (b))) == TV_CLASSIFY_ALL_ONE)) {
+ return v;
}
- break;
- case iro_Or:
- if ((ta != tarval_bad) && (tb != tarval_bad)) {
- res = tarval_or (ta, tb);
+ }
+ return tarval_bad;
+}
+
+static tarval *computed_value_Eor(ir_node *n)
+{
+ ir_node *a = get_Eor_left(n);
+ ir_node *b = get_Eor_right(n);
+
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ if ((ta != tarval_bad) && (tb != tarval_bad)) {
+ return tarval_eor (ta, tb);
+ }
+ return tarval_bad;
+}
+
+static tarval *computed_value_Not(ir_node *n)
+{
+ ir_node *a = get_Not_op(n);
+ tarval *ta = value_of(a);
+
+ if (ta != tarval_bad)
+ return tarval_not(ta);
+
+ return tarval_bad;
+}
+
+static tarval *computed_value_Shl(ir_node *n)
+{
+ ir_node *a = get_Shl_left(n);
+ ir_node *b = get_Shl_right(n);
+
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ if ((ta != tarval_bad) && (tb != tarval_bad)) {
+ return tarval_shl (ta, tb);
+ }
+ return tarval_bad;
+}
+
+static tarval *computed_value_Shr(ir_node *n)
+{
+ ir_node *a = get_Shr_left(n);
+ ir_node *b = get_Shr_right(n);
+
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ if ((ta != tarval_bad) && (tb != tarval_bad)) {
+ return tarval_shr (ta, tb);
+ }
+ return tarval_bad;
+}
+
+static tarval *computed_value_Shrs(ir_node *n)
+{
+ ir_node *a = get_Shrs_left(n);
+ ir_node *b = get_Shrs_right(n);
+
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ if ((ta != tarval_bad) && (tb != tarval_bad)) {
+ return tarval_shrs (ta, tb);
+ }
+ return tarval_bad;
+}
+
+static tarval *computed_value_Rot(ir_node *n)
+{
+ ir_node *a = get_Rot_left(n);
+ ir_node *b = get_Rot_right(n);
+
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ if ((ta != tarval_bad) && (tb != tarval_bad)) {
+ /* return tarval_rot (ta, tb); */
+ }
+ return tarval_bad;
+}
+
+static tarval *computed_value_Conv(ir_node *n)
+{
+ ir_node *a = get_Conv_op(n);
+ tarval *ta = value_of(a);
+
+ if (ta != tarval_bad)
+ return tarval_convert_to(ta, get_irn_mode(n));
+
+ return tarval_bad;
+}
+
+static tarval *computed_value_Proj(ir_node *n)
+{
+ ir_node *a = get_Proj_pred(n), *b;
+ ir_node *aa, *ab;
+
+ /* Optimize Cmp nodes.
+ This performs a first step of unreachable code elimination.
+ Proj can not be computed, but folding a Cmp above the Proj here is
+ not as wasteful as folding a Cmp into a Tuple of 16 Consts of which
+ only 1 is used.
+ There are several case where we can evaluate a Cmp node:
+ 1. The nodes compared are both the same. If we compare for
+ equal, greater equal, ... this will return true, else it
+ will return false. This step relies on cse.
+ 2. The predecessors of Cmp are target values. We can evaluate
+ the Cmp.
+ 3. The predecessors are Allocs or void* constants. Allocs never
+ return NULL, they raise an exception. Therefore we can predict
+ the Cmp result. */
+ if (get_irn_op(a) == op_Cmp) {
+ aa = get_Cmp_left(a);
+ ab = get_Cmp_right(a);
+
+ if (aa == ab) { /* 1.: */
+ /* This is a tric with the bits used for encoding the Cmp
+ Proj numbers, the following statement is not the same:
+ return new_tarval_from_long ((get_Proj_proj(n) == Eq), mode_b) */
+ return new_tarval_from_long ((get_Proj_proj(n) & Eq), mode_b);
} else {
- tarval *v;
- if ( (tarval_classify ((v = computed_value (a))) == TV_CLASSIFY_ALL_ONE)
- || (tarval_classify ((v = computed_value (b))) == TV_CLASSIFY_ALL_ONE)) {
- res = v;
- }
- }
- break;
- case iro_Eor:
- if ((ta != tarval_bad) && (tb != tarval_bad)) {
- res = tarval_eor (ta, tb);
- }
- break;
- case iro_Not:
- if ((ta != tarval_bad)) {
- res = tarval_not (ta);
- }
- break;
- case iro_Shl:
- if ((ta != tarval_bad) && (tb != tarval_bad)) {
- res = tarval_shl (ta, tb);
- }
- break;
- case iro_Shr:
- if ((ta != tarval_bad) && (tb != tarval_bad)) {
- res = tarval_shr (ta, tb);
- }
- break;
- case iro_Shrs:
- if ((ta != tarval_bad) && (tb != tarval_bad)) {
- res = tarval_shrs (ta, tb);
- }
- break;
- case iro_Rot:
- if ((ta != tarval_bad) && (tb != tarval_bad)) {
- /*res = tarval_rot (ta, tb)*/;
- }
- break;
- case iro_Conv:
- if (ta != tarval_bad) {
- res = tarval_convert_to (ta, get_irn_mode (n));
- }
- break;
- case iro_Proj: /* iro_Cmp */
- {
- ir_node *aa, *ab;
-
- a = get_Proj_pred(n);
- /* Optimize Cmp nodes.
- This performs a first step of unreachable code elimination.
- Proj can not be computed, but folding a Cmp above the Proj here is
- not as wasteful as folding a Cmp into a Tuple of 16 Consts of which
- only 1 is used.
- There are several case where we can evaluate a Cmp node:
- 1. The nodes compared are both the same. If we compare for
- equal, greater equal, ... this will return true, else it
- will return false. This step relies on cse.
- 2. The predecessors of Cmp are target values. We can evaluate
- the Cmp.
- 3. The predecessors are Allocs or void* constants. Allocs never
- return NULL, they raise an exception. Therefore we can predict
- the Cmp result. */
- if (get_irn_op(a) == op_Cmp) {
- aa = get_Cmp_left(a);
- ab = get_Cmp_right(a);
- if (aa == ab) { /* 1.: */
- /* This is a tric with the bits used for encoding the Cmp
- Proj numbers, the following statement is not the same:
- res = new_tarval_from_long ((get_Proj_proj(n) == Eq), mode_b) */
- res = new_tarval_from_long ((get_Proj_proj(n) & Eq), mode_b);
- } else {
- tarval *taa = computed_value (aa);
- tarval *tab = computed_value (ab);
- if ((taa != tarval_bad) && (tab != tarval_bad)) { /* 2.: */
- /* strange checks... */
- pnc_number flags = tarval_cmp (taa, tab);
- if (flags != False) {
- res = new_tarval_from_long (get_Proj_proj(n) & flags, mode_b);
- }
- } else { /* check for 3.: */
- ir_node *aaa = skip_nop(skip_Proj(aa));
- ir_node *aba = skip_nop(skip_Proj(ab));
- if ( ( (/* aa is ProjP and aaa is Alloc */
- (get_irn_op(aa) == op_Proj)
- && (mode_is_reference(get_irn_mode(aa)))
- && (get_irn_op(aaa) == op_Alloc))
- && ( (/* ab is constant void */
- (get_irn_op(ab) == op_Const)
- && (mode_is_reference(get_irn_mode(ab)))
- && (get_Const_tarval(ab) == get_mode_null(get_irn_mode(ab))))
- || (/* ab is other Alloc */
- (get_irn_op(ab) == op_Proj)
- && (mode_is_reference(get_irn_mode(ab)))
- && (get_irn_op(aba) == op_Alloc)
- && (aaa != aba))))
- || (/* aa is void and aba is Alloc */
- (get_irn_op(aa) == op_Const)
- && (mode_is_reference(get_irn_mode(aa)))
- && (get_Const_tarval(aa) == get_mode_null(get_irn_mode(aa)))
- && (get_irn_op(ab) == op_Proj)
- && (mode_is_reference(get_irn_mode(ab)))
- && (get_irn_op(aba) == op_Alloc)))
- /* 3.: */
- res = new_tarval_from_long (get_Proj_proj(n) & Ne, mode_b);
- }
- }
- } else if (get_irn_op(a) == op_DivMod) {
- ta = value_of(get_DivMod_left(a));
- tb = value_of(get_DivMod_right(a));
- if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
- if (tb == get_mode_null(get_tarval_mode(tb))) break; /* div by zero: return tarval_bad */
- if (get_Proj_proj(n)== 0) /* Div */
- res = tarval_div(ta, tb);
- else /* Mod */
- res = tarval_mod(ta, tb);
+ tarval *taa = computed_value (aa);
+ tarval *tab = computed_value (ab);
+
+ if ((taa != tarval_bad) && (tab != tarval_bad)) { /* 2.: */
+ /* strange checks... */
+ pnc_number flags = tarval_cmp (taa, tab);
+ if (flags != False) {
+ return new_tarval_from_long (get_Proj_proj(n) & flags, mode_b);
}
+ } else { /* check for 3.: */
+ ir_node *aaa = skip_nop(skip_Proj(aa));
+ ir_node *aba = skip_nop(skip_Proj(ab));
+
+ if ( ( (/* aa is ProjP and aaa is Alloc */
+ (get_irn_op(aa) == op_Proj)
+ && (mode_is_reference(get_irn_mode(aa)))
+ && (get_irn_op(aaa) == op_Alloc))
+ && ( (/* ab is constant void */
+ (get_irn_op(ab) == op_Const)
+ && (mode_is_reference(get_irn_mode(ab)))
+ && (get_Const_tarval(ab) == get_mode_null(get_irn_mode(ab))))
+ || (/* ab is other Alloc */
+ (get_irn_op(ab) == op_Proj)
+ && (mode_is_reference(get_irn_mode(ab)))
+ && (get_irn_op(aba) == op_Alloc)
+ && (aaa != aba))))
+ || (/* aa is void and aba is Alloc */
+ (get_irn_op(aa) == op_Const)
+ && (mode_is_reference(get_irn_mode(aa)))
+ && (get_Const_tarval(aa) == get_mode_null(get_irn_mode(aa)))
+ && (get_irn_op(ab) == op_Proj)
+ && (mode_is_reference(get_irn_mode(ab)))
+ && (get_irn_op(aba) == op_Alloc)))
+ /* 3.: */
+ return new_tarval_from_long (get_Proj_proj(n) & Ne, mode_b);
}
}
- break;
- default: ;
+ } else if (get_irn_op(a) == op_DivMod) {
+ tarval *tb = value_of(b = get_DivMod_right(a));
+ tarval *ta = value_of(a = get_DivMod_left(a));
+
+ if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
+ if (tb == get_mode_null(get_tarval_mode(tb))) /* div by zero: return tarval_bad */
+ return tarval_bad;
+ if (get_Proj_proj(n)== 0) /* Div */
+ return tarval_div(ta, tb);
+ else /* Mod */
+ return tarval_mod(ta, tb);
+ }
}
+ return tarval_bad;
+}
+
+/**
+ * If the parameter n can be computed, return its value, else tarval_bad.
+ * Performs constant folding.
+ *
+ * GL: Only if n is arithmetic operator?
+ */
+tarval *computed_value(ir_node *n)
+{
+ if (n->op->computed_value)
+ return n->op->computed_value(n);
+ return tarval_bad;
+}
- return res;
-} /* compute node */
+/**
+ * set the default computed_value evaluator
+ */
+static ir_op *firm_set_default_computed_value(ir_op *op)
+{
+#define CASE(a) \
+ case iro_##a: \
+ op->computed_value = computed_value_##a; \
+ break
+
+ switch (op->code) {
+ CASE(Const);
+ CASE(SymConst);
+ CASE(Add);
+ CASE(Sub);
+ CASE(Minus);
+ CASE(Mul);
+ CASE(Quot);
+ CASE(Div);
+ CASE(Mod);
+ CASE(Abs);
+ CASE(And);
+ CASE(Or);
+ CASE(Eor);
+ CASE(Not);
+ CASE(Shl);
+ CASE(Shr);
+ CASE(Shrs);
+ CASE(Rot);
+ CASE(Conv);
+ CASE(Proj);
+ default:
+ op->computed_value = NULL;
+ }
+ return op;
+#undef CASE
+}
#if 0
/* returns 1 if the a and b are pointers to different locations. */
}
#endif
-/**
- * equivalent_node() returns a node equivalent to input n. It skips all nodes that
- * perform no actual computation, as, e.g., the Id nodes. It does not create
- * new nodes. It is therefore safe to free n if the node returned is not n.
- * If a node returns a Tuple we can not just skip it. If the size of the
- * in array fits, we transform n into a tuple (e.g., Div).
- */
-ir_node *
-equivalent_node (ir_node *n)
+static ir_node *equivalent_node_Block(ir_node *n)
+{
+ ir_node *oldn = n;
+
+ /* The Block constructor does not call optimize, but mature_block
+ calls the optimization. */
+ assert(get_Block_matured(n));
+
+ /* Straightening: a single entry Block following a single exit Block
+ can be merged, if it is not the Start block. */
+ /* !!! Beware, all Phi-nodes of n must have been optimized away.
+ This should be true, as the block is matured before optimize is called.
+ But what about Phi-cycles with the Phi0/Id that could not be resolved?
+ Remaining Phi nodes are just Ids. */
+ if ((get_Block_n_cfgpreds(n) == 1) &&
+ (get_irn_op(get_Block_cfgpred(n, 0)) == op_Jmp) &&
+ (get_opt_control_flow_straightening())) {
+ n = get_nodes_Block(get_Block_cfgpred(n, 0)); DBG_OPT_STG;
+
+ } else if ((get_Block_n_cfgpreds(n) == 2) &&
+ (get_opt_control_flow_weak_simplification())) {
+ /* Test whether Cond jumps twice to this block
+ @@@ we could do this also with two loops finding two preds from several ones. */
+ ir_node *a = get_Block_cfgpred(n, 0);
+ ir_node *b = get_Block_cfgpred(n, 1);
+
+ if ((get_irn_op(a) == op_Proj) &&
+ (get_irn_op(b) == op_Proj) &&
+ (get_Proj_pred(a) == get_Proj_pred(b)) &&
+ (get_irn_op(get_Proj_pred(a)) == op_Cond) &&
+ (get_irn_mode(get_Cond_selector(get_Proj_pred(a))) == mode_b)) {
+ /* Also a single entry Block following a single exit Block. Phis have
+ twice the same operand and will be optimized away. */
+ n = get_nodes_Block(a); DBG_OPT_IFSIM;
+ }
+ } else if (get_opt_unreachable_code() &&
+ (n != current_ir_graph->start_block) &&
+ (n != current_ir_graph->end_block) ) {
+ int i;
+ /* If all inputs are dead, this block is dead too, except if it is
+ the start or end block. This is a step of unreachable code
+ elimination */
+ for (i = 0; i < get_Block_n_cfgpreds(n); i++) {
+ if (!is_Bad(get_Block_cfgpred(n, i))) break;
+ }
+ if (i == get_Block_n_cfgpreds(n))
+ n = new_Bad();
+ }
+
+ return n;
+}
+
+static ir_node *equivalent_node_Jmp(ir_node *n)
+{
+ /* GL: Why not same for op_Raise?? */
+ /* unreachable code elimination */
+ if (is_Bad(get_nodes_Block(n)))
+ n = new_Bad();
+
+ return n;
+}
+
+static ir_node *equivalent_node_Cond(ir_node *n)
+{
+ /* We do not evaluate Cond here as we replace it by a new node, a Jmp.
+ See cases for iro_Cond and iro_Proj in transform_node. */
+ return n;
+}
+
+static ir_node *equivalent_node_Or(ir_node *n)
+{
+ ir_node *a = get_Or_left(n);
+ ir_node *b = get_Or_right(n);
+
+ /* remove a v a */
+ if (a == b)
+ n = a;
+
+ return n;
+}
+
+static ir_node *equivalent_node_neutral_zero(ir_node *n)
+{
+ ir_node *oldn = n;
+
+ ir_node *a = get_binop_left(n);
+ ir_node *b = get_binop_right(n);
+
+ tarval *tv;
+ ir_node *on;
+
+ /* After running compute_node there is only one constant predecessor.
+ Find this predecessors value and remember the other node: */
+ if ((tv = computed_value (a)) != tarval_bad) {
+ on = b;
+ } else if ((tv = computed_value (b)) != tarval_bad) {
+ on = a;
+ } else
+ return n;
+
+ /* If this predecessors constant value is zero, the operation is
+ unnecessary. Remove it: */
+ if (tarval_classify (tv) == TV_CLASSIFY_NULL) {
+ n = on; DBG_OPT_ALGSIM1;
+ }
+
+ return n;
+}
+
+static ir_node *equivalent_node_Add(ir_node *n)
+{
+ return equivalent_node_neutral_zero(n);
+}
+
+static ir_node *equivalent_node_Eor(ir_node *n)
+{
+ return equivalent_node_neutral_zero(n);
+}
+
+static ir_node *equivalent_node_left_zero(ir_node *n)
+{
+ ir_node *oldn = n;
+
+ ir_node *a = get_binop_left(n);
+ ir_node *b = get_binop_right(n);
+
+ /* optimize operations that are not commutative but have neutral 0 on left. Test only one predecessor. */
+ if (tarval_classify (computed_value (b)) == TV_CLASSIFY_NULL) {
+ n = a; DBG_OPT_ALGSIM1;
+ }
+
+ return n;
+}
+
+static ir_node *equivalent_node_Sub(ir_node *n)
+{
+ return equivalent_node_left_zero(n);
+}
+
+static ir_node *equivalent_node_Shl(ir_node *n)
+{
+ return equivalent_node_left_zero(n);
+}
+
+static ir_node *equivalent_node_Shr(ir_node *n)
+{
+ return equivalent_node_left_zero(n);
+}
+
+static ir_node *equivalent_node_Shrs(ir_node *n)
+{
+ return equivalent_node_left_zero(n);
+}
+
+static ir_node *equivalent_node_Rot(ir_node *n)
+{
+ return equivalent_node_left_zero(n);
+}
+
+static ir_node *equivalent_node_symmetric_unop(ir_node *n)
+{
+ ir_node *oldn = n;
+
+ /* optimize symmetric unop */
+ if (get_irn_op(get_unop_op(n)) == get_irn_op(n)) {
+ n = get_unop_op(get_unop_op(n)); DBG_OPT_ALGSIM2;
+ }
+ return n;
+}
+
+static ir_node *equivalent_node_Not(ir_node *n)
+{
+ /* NotNot x == x */
+ return equivalent_node_symmetric_unop(n);
+}
+
+static ir_node *equivalent_node_Minus(ir_node *n)
+{
+ /* --x == x */ /* ??? Is this possible or can --x raise an
+ out of bounds exception if min =! max? */
+ return equivalent_node_symmetric_unop(n);
+}
+
+static ir_node *equivalent_node_Mul(ir_node *n)
+{
+ ir_node *oldn = n;
+
+ ir_node *a = get_Mul_left(n);
+ ir_node *b = get_Mul_right(n);
+
+ /* Mul is commutative and has again an other neutral element. */
+ if (tarval_classify (computed_value (a)) == TV_CLASSIFY_ONE) {
+ n = b; DBG_OPT_ALGSIM1;
+ } else if (tarval_classify (computed_value (b)) == TV_CLASSIFY_ONE) {
+ n = a; DBG_OPT_ALGSIM1;
+ }
+ return n;
+}
+
+static ir_node *equivalent_node_Div(ir_node *n)
+{
+ ir_node *a = get_Div_left(n);
+ ir_node *b = get_Div_right(n);
+
+ /* Div is not commutative. */
+ if (tarval_classify (computed_value (b)) == TV_CLASSIFY_ONE) { /* div(x, 1) == x */
+ /* Turn Div into a tuple (mem, bad, a) */
+ ir_node *mem = get_Div_mem(n);
+ turn_into_tuple(n, 3);
+ set_Tuple_pred(n, 0, mem);
+ set_Tuple_pred(n, 1, new_Bad());
+ set_Tuple_pred(n, 2, a);
+ }
+ return n;
+}
+
+static ir_node *equivalent_node_And(ir_node *n)
+{
+ ir_node *oldn = n;
+
+ ir_node *a = get_And_left(n);
+ ir_node *b = get_And_right(n);
+
+ if (a == b) {
+ n = a; /* And has it's own neutral element */
+ } else if (tarval_classify (computed_value (a)) == TV_CLASSIFY_ALL_ONE) {
+ n = b;
+ } else if (tarval_classify (computed_value (b)) == TV_CLASSIFY_ALL_ONE) {
+ n = a;
+ }
+ if (n != oldn) DBG_OPT_ALGSIM1;
+ return n;
+}
+
+static ir_node *equivalent_node_Conv(ir_node *n)
{
- int ins;
- ir_node *a = NULL; /* to shutup gcc */
- ir_node *b = NULL; /* to shutup gcc */
- ir_node *c = NULL; /* to shutup gcc */
ir_node *oldn = n;
+ ir_node *a = get_Conv_op(n);
+ ir_node *b;
- ins = get_irn_arity (n);
+ ir_mode *n_mode = get_irn_mode(n);
+ ir_mode *a_mode = get_irn_mode(a);
- /* get the operands we will work on */
- if (is_binop(n)) {
- a = get_binop_left(n);
- b = get_binop_right(n);
- } else if (is_unop(n)) {
- a = get_unop_op(n);
- }
+ if (n_mode == a_mode) { /* No Conv necessary */
+ n = a; DBG_OPT_ALGSIM3;
+ } else if (get_irn_op(a) == op_Conv) { /* Conv(Conv(b)) */
+ ir_mode *b_mode;
- /* skip unnecessary nodes. */
- switch (get_irn_opcode (n)) {
- case iro_Block:
- {
- /* The Block constructor does not call optimize, but mature_block
- calls the optimization. */
- assert(get_Block_matured(n));
-
- /* Straightening: a single entry Block following a single exit Block
- can be merged, if it is not the Start block. */
- /* !!! Beware, all Phi-nodes of n must have been optimized away.
- This should be true, as the block is matured before optimize is called.
- But what about Phi-cycles with the Phi0/Id that could not be resolved?
- Remaining Phi nodes are just Ids. */
- if ((get_Block_n_cfgpreds(n) == 1) &&
- (get_irn_op(get_Block_cfgpred(n, 0)) == op_Jmp) &&
- (get_opt_control_flow_straightening())) {
- n = get_nodes_Block(get_Block_cfgpred(n, 0)); DBG_OPT_STG;
-
- } else if ((get_Block_n_cfgpreds(n) == 2) &&
- (get_opt_control_flow_weak_simplification())) {
- /* Test whether Cond jumps twice to this block
- @@@ we could do this also with two loops finding two preds from several ones. */
- a = get_Block_cfgpred(n, 0);
- b = get_Block_cfgpred(n, 1);
- if ((get_irn_op(a) == op_Proj) &&
- (get_irn_op(b) == op_Proj) &&
- (get_Proj_pred(a) == get_Proj_pred(b)) &&
- (get_irn_op(get_Proj_pred(a)) == op_Cond) &&
- (get_irn_mode(get_Cond_selector(get_Proj_pred(a))) == mode_b)) {
- /* Also a single entry Block following a single exit Block. Phis have
- twice the same operand and will be optimized away. */
- n = get_nodes_Block(a); DBG_OPT_IFSIM;
- }
- } else if (get_opt_unreachable_code() &&
- (n != current_ir_graph->start_block) &&
- (n != current_ir_graph->end_block) ) {
- int i;
- /* If all inputs are dead, this block is dead too, except if it is
- the start or end block. This is a step of unreachable code
- elimination */
- for (i = 0; i < get_Block_n_cfgpreds(n); i++) {
- if (!is_Bad(get_Block_cfgpred(n, i))) break;
- }
- if (i == get_Block_n_cfgpreds(n))
- n = new_Bad();
- }
- }
- break;
+ b = get_Conv_op(a);
+ n_mode = get_irn_mode(n);
+ b_mode = get_irn_mode(b);
- case iro_Jmp: /* GL: Why not same for op_Raise?? */
- /* unreachable code elimination */
- if (is_Bad(get_nodes_Block(n))) n = new_Bad();
- break;
- /* We do not evaluate Cond here as we replace it by a new node, a Jmp.
- See cases for iro_Cond and iro_Proj in transform_node. */
- /** remove stuff as x+0, x*1 x&true ... constant expression evaluation **/
- case iro_Or: if (a == b) {n = a; break;}
- case iro_Add:
- case iro_Eor: {
- tarval *tv;
- ir_node *on;
- /* After running compute_node there is only one constant predecessor.
- Find this predecessors value and remember the other node: */
- if ((tv = computed_value (a)) != tarval_bad) {
- on = b;
- } else if ((tv = computed_value (b)) != tarval_bad) {
- on = a;
- } else break;
-
- /* If this predecessors constant value is zero, the operation is
- unnecessary. Remove it: */
- if (tarval_classify (tv) == TV_CLASSIFY_NULL) {
- n = on; DBG_OPT_ALGSIM1;
- }
- } break;
- case iro_Sub:
- case iro_Shl:
- case iro_Shr:
- case iro_Shrs:
- case iro_Rot:
- /* these operations are not commutative. Test only one predecessor. */
- if (tarval_classify (computed_value (b)) == TV_CLASSIFY_NULL) {
- n = a; DBG_OPT_ALGSIM1;
- /* Test if b > #bits of a ==> return 0 / divide b by #bits
- --> transform node? */
- }
- break;
- case iro_Not: /* NotNot x == x */
- case iro_Minus: /* --x == x */ /* ??? Is this possible or can --x raise an
- out of bounds exception if min =! max? */
- if (get_irn_op(get_unop_op(n)) == get_irn_op(n)) {
- n = get_unop_op(get_unop_op(n)); DBG_OPT_ALGSIM2;
- }
- break;
- case iro_Mul:
- /* Mul is commutative and has again an other neutral element. */
- if (tarval_classify (computed_value (a)) == TV_CLASSIFY_ONE) {
- n = b; DBG_OPT_ALGSIM1;
- } else if (tarval_classify (computed_value (b)) == TV_CLASSIFY_ONE) {
- n = a; DBG_OPT_ALGSIM1;
- }
- break;
- case iro_Div:
- /* Div is not commutative. */
- if (tarval_classify (computed_value (b)) == TV_CLASSIFY_ONE) { /* div(x, 1) == x */
- /* Turn Div into a tuple (mem, bad, a) */
- ir_node *mem = get_Div_mem(n);
- turn_into_tuple(n, 3);
- set_Tuple_pred(n, 0, mem);
- set_Tuple_pred(n, 1, new_Bad());
- set_Tuple_pred(n, 2, a);
- }
- break;
- /*
- case iro_Mod, Quot, DivMod
- DivMod allocates new nodes --> it's treated in transform node.
- What about Quot, DivMod?
- */
- case iro_And:
- if (a == b) {
- n = a; /* And has it's own neutral element */
- } else if (tarval_classify (computed_value (a)) == TV_CLASSIFY_ALL_ONE) {
- n = b;
- } else if (tarval_classify (computed_value (b)) == TV_CLASSIFY_ALL_ONE) {
- n = a;
- }
- if (n != oldn) DBG_OPT_ALGSIM1;
- break;
- case iro_Conv:
- {
- ir_mode *n_mode = get_irn_mode(n);
- ir_mode *a_mode = get_irn_mode(a);
-
- if (n_mode == a_mode) { /* No Conv necessary */
- n = a; DBG_OPT_ALGSIM3;
- } else if (get_irn_op(a) == op_Conv) { /* Conv(Conv(b)) */
- ir_mode *b_mode;
-
- b = get_Conv_op(a);
- n_mode = get_irn_mode(n);
- b_mode = get_irn_mode(b);
-
- if (n_mode == b_mode) {
- if (n_mode == mode_b) {
- n = b; /* Convb(Conv*(xxxb(...))) == xxxb(...) */ DBG_OPT_ALGSIM1;
+ if (n_mode == b_mode) {
+ if (n_mode == mode_b) {
+ n = b; /* Convb(Conv*(xxxb(...))) == xxxb(...) */ DBG_OPT_ALGSIM1;
+ }
+ else if (mode_is_int(n_mode) || mode_is_character(n_mode)) {
+ if (smaller_mode(b_mode, a_mode)){
+ n = b; /* ConvS(ConvL(xxxS(...))) == xxxS(...) */ DBG_OPT_ALGSIM1;
}
- else if (mode_is_int(n_mode) || mode_is_character(n_mode)) {
- if (smaller_mode(b_mode, a_mode)){
- n = b; /* ConvS(ConvL(xxxS(...))) == xxxS(...) */ DBG_OPT_ALGSIM1;
- }
- }
}
}
- break;
}
- case iro_Phi:
- {
- /* Several optimizations:
- - no Phi in start block.
- - remove Id operators that are inputs to Phi
- - fold Phi-nodes, iff they have only one predecessor except
- themselves.
- */
- int i, n_preds;
+ return n;
+}
+
+static ir_node *equivalent_node_Phi(ir_node *n)
+{
+ /* Several optimizations:
+ - no Phi in start block.
+ - remove Id operators that are inputs to Phi
+ - fold Phi-nodes, iff they have only one predecessor except
+ themselves.
+ */
+ int i, n_preds;
- ir_node *block = NULL; /* to shutup gcc */
- ir_node *first_val = NULL; /* to shutup gcc */
- ir_node *scnd_val = NULL; /* to shutup gcc */
+ ir_node *oldn = n;
+ ir_node *block = NULL; /* to shutup gcc */
+ ir_node *first_val = NULL; /* to shutup gcc */
+ ir_node *scnd_val = NULL; /* to shutup gcc */
- if (!get_opt_normalize()) return n;
+ if (!get_opt_normalize()) return n;
- n_preds = get_Phi_n_preds(n);
+ n_preds = get_Phi_n_preds(n);
- block = get_nodes_Block(n);
- /* @@@ fliegt 'raus, sollte aber doch immer wahr sein!!!
- assert(get_irn_arity(block) == n_preds && "phi in wrong block!"); */
- if ((is_Bad(block)) || /* Control dead */
- (block == current_ir_graph->start_block)) /* There should be no Phi nodes */
- return new_Bad(); /* in the Start Block. */
+ block = get_nodes_Block(n);
+ /* @@@ fliegt 'raus, sollte aber doch immer wahr sein!!!
+ assert(get_irn_arity(block) == n_preds && "phi in wrong block!"); */
+ if ((is_Bad(block)) || /* Control dead */
+ (block == current_ir_graph->start_block)) /* There should be no Phi nodes */
+ return new_Bad(); /* in the Start Block. */
- if (n_preds == 0) break; /* Phi of dead Region without predecessors. */
+ if (n_preds == 0) return n; /* Phi of dead Region without predecessors. */
#if 0
- /* first we test for a special case: */
- /* Confirm is a special node fixing additional information for a
- value that is known at a certain point. This is useful for
- dataflow analysis. */
- if (n_preds == 2) {
- ir_node *a = follow_Id (get_Phi_pred(n, 0));
- ir_node *b = follow_Id (get_Phi_pred(n, 1));
- if ( (get_irn_op(a) == op_Confirm)
- && (get_irn_op(b) == op_Confirm)
- && (follow_Id (get_irn_n(a, 0)) == follow_Id(get_irn_n(b, 0)))
- && (get_irn_n(a, 1) == get_irn_n (b, 1))
- && (a->data.num == (~b->data.num & irpn_True) )) {
- n = follow_Id (get_irn_n(a, 0));
- break;
- }
- }
+ /* first we test for a special case: */
+ /* Confirm is a special node fixing additional information for a
+ value that is known at a certain point. This is useful for
+ dataflow analysis. */
+ if (n_preds == 2) {
+ ir_node *a = follow_Id (get_Phi_pred(n, 0));
+ ir_node *b = follow_Id (get_Phi_pred(n, 1));
+ if ( (get_irn_op(a) == op_Confirm)
+ && (get_irn_op(b) == op_Confirm)
+ && (follow_Id (get_irn_n(a, 0)) == follow_Id(get_irn_n(b, 0)))
+ && (get_irn_n(a, 1) == get_irn_n (b, 1))
+ && (a->data.num == (~b->data.num & irpn_True) )) {
+ return follow_Id (get_irn_n(a, 0));
+ }
+ }
#endif
- /* Find first non-self-referencing input */
- for (i = 0; i < n_preds; ++i) {
- first_val = follow_Id(get_Phi_pred(n, i));
- /* skip Id's */
- set_Phi_pred(n, i, first_val);
- if ( (first_val != n) /* not self pointer */
- && (get_irn_op(first_val) != op_Bad) /* value not dead */
- && !(is_Bad (get_Block_cfgpred(block, i))) ) { /* not dead control flow */
- break; /* then found first value. */
- }
- }
+ /* Find first non-self-referencing input */
+ for (i = 0; i < n_preds; ++i) {
+ first_val = follow_Id(get_Phi_pred(n, i));
+ /* skip Id's */
+ set_Phi_pred(n, i, first_val);
+ if ( (first_val != n) /* not self pointer */
+ && (get_irn_op(first_val) != op_Bad) /* value not dead */
+ && !(is_Bad (get_Block_cfgpred(block, i))) ) { /* not dead control flow */
+ break; /* then found first value. */
+ }
+ }
- /* A totally Bad or self-referencing Phi (we didn't break the above loop) */
- if (i >= n_preds) { n = new_Bad(); break; }
-
- scnd_val = NULL;
-
- /* follow_Id () for rest of inputs, determine if any of these
- are non-self-referencing */
- while (++i < n_preds) {
- scnd_val = follow_Id(get_Phi_pred(n, i));
- /* skip Id's */
- set_Phi_pred(n, i, scnd_val);
- if ( (scnd_val != n)
- && (scnd_val != first_val)
- && (get_irn_op(scnd_val) != op_Bad)
- && !(is_Bad (get_Block_cfgpred(block, i))) ) {
- break;
- }
- }
+ /* A totally Bad or self-referencing Phi (we didn't break the above loop) */
+ if (i >= n_preds) { return new_Bad(); }
+
+ scnd_val = NULL;
+
+ /* follow_Id () for rest of inputs, determine if any of these
+ are non-self-referencing */
+ while (++i < n_preds) {
+ scnd_val = follow_Id(get_Phi_pred(n, i));
+ /* skip Id's */
+ set_Phi_pred(n, i, scnd_val);
+ if ( (scnd_val != n)
+ && (scnd_val != first_val)
+ && (get_irn_op(scnd_val) != op_Bad)
+ && !(is_Bad (get_Block_cfgpred(block, i))) ) {
+ break;
+ }
+ }
- /* Fold, if no multiple distinct non-self-referencing inputs */
- if (i >= n_preds) {
- n = first_val; DBG_OPT_PHI;
- } else {
- /* skip the remaining Ids. */
- while (++i < n_preds) {
- set_Phi_pred(n, i, follow_Id(get_Phi_pred(n, i)));
- }
- }
+ /* Fold, if no multiple distinct non-self-referencing inputs */
+ if (i >= n_preds) {
+ n = first_val; DBG_OPT_PHI;
+ } else {
+ /* skip the remaining Ids. */
+ while (++i < n_preds) {
+ set_Phi_pred(n, i, follow_Id(get_Phi_pred(n, i)));
}
- break;
+ }
+ return n;
+}
- case iro_Load:
- {
+static ir_node *equivalent_node_Load(ir_node *n)
+{
#if 0 /* Is an illegal transformation: different nodes can
represent the same pointer value!! */
- a = skip_Proj(get_Load_mem(n));
- b = get_Load_ptr(n);
+ ir_node *a = skip_Proj(get_Load_mem(n));
+ ir_node *b = get_Load_ptr(n);
if (get_irn_op(a) == op_Store) {
if ( different_identity (b, get_Store_ptr(a))) {
}
}
#endif
- }
- break;
- case iro_Store:
- /* remove unnecessary store. */
- {
- a = skip_Proj(get_Store_mem(n));
- b = get_Store_ptr(n);
- c = skip_Proj(get_Store_value(n));
-
- if (get_irn_op(a) == op_Store
- && get_Store_ptr(a) == b
- && skip_Proj(get_Store_value(a)) == c) {
- /* We have twice exactly the same store -- a write after write. */
- n = a; DBG_OPT_WAW;
- } else if (get_irn_op(c) == op_Load
- && (a == c || skip_Proj(get_Load_mem(c)) == a)
- && get_Load_ptr(c) == b ) {
- /* We just loaded the value from the same memory, i.e., the store
- doesn't change the memory -- a write after read. */
- a = get_Store_mem(n);
- turn_into_tuple(n, 2);
- set_Tuple_pred(n, 0, a);
- set_Tuple_pred(n, 1, new_Bad()); DBG_OPT_WAR;
- }
- }
- break;
+ return n;
+}
- case iro_Proj:
- {
- a = get_Proj_pred(n);
-
- if ( get_irn_op(a) == op_Tuple) {
- /* Remove the Tuple/Proj combination. */
- if ( get_Proj_proj(n) <= get_Tuple_n_preds(a) ) {
- n = get_Tuple_pred(a, get_Proj_proj(n)); DBG_OPT_TUPLE;
- } else {
- assert(0); /* This should not happen! */
- n = new_Bad();
- }
- } else if (get_irn_mode(n) == mode_X &&
- is_Bad(get_nodes_Block(n))) {
- /* Remove dead control flow -- early gigo. */
- n = new_Bad();
- }
- }
- break;
+static ir_node *equivalent_node_Store(ir_node *n)
+{
+ ir_node *oldn = n;
- case iro_Id:
- n = follow_Id (n); DBG_OPT_ID;
- break;
+ /* remove unnecessary store. */
+ ir_node *a = skip_Proj(get_Store_mem(n));
+ ir_node *b = get_Store_ptr(n);
+ ir_node *c = skip_Proj(get_Store_value(n));
+
+ if (get_irn_op(a) == op_Store
+ && get_Store_ptr(a) == b
+ && skip_Proj(get_Store_value(a)) == c) {
+ /* We have twice exactly the same store -- a write after write. */
+ n = a; DBG_OPT_WAW;
+ } else if (get_irn_op(c) == op_Load
+ && (a == c || skip_Proj(get_Load_mem(c)) == a)
+ && get_Load_ptr(c) == b ) {
+ /* We just loaded the value from the same memory, i.e., the store
+ doesn't change the memory -- a write after read. */
+ a = get_Store_mem(n);
+ turn_into_tuple(n, 2);
+ set_Tuple_pred(n, 0, a);
+ set_Tuple_pred(n, 1, new_Bad()); DBG_OPT_WAR;
+ }
+ return n;
+}
- default: break;
+static ir_node *equivalent_node_Proj(ir_node *n)
+{
+ ir_node *oldn = n;
+
+ ir_node *a = get_Proj_pred(n);
+
+ if ( get_irn_op(a) == op_Tuple) {
+ /* Remove the Tuple/Proj combination. */
+ if ( get_Proj_proj(n) <= get_Tuple_n_preds(a) ) {
+ n = get_Tuple_pred(a, get_Proj_proj(n)); DBG_OPT_TUPLE;
+ } else {
+ assert(0); /* This should not happen! */
+ n = new_Bad();
+ }
+ } else if (get_irn_mode(n) == mode_X &&
+ is_Bad(get_nodes_Block(n))) {
+ /* Remove dead control flow -- early gigo. */
+ n = new_Bad();
}
+ return n;
+}
+
+static ir_node *equivalent_node_Id(ir_node *n)
+{
+ ir_node *oldn = n;
+ n = follow_Id (n); DBG_OPT_ID;
return n;
-} /* end equivalent_node() */
+}
+
+/*
+case iro_Mod, Quot, DivMod
+ DivMod allocates new nodes --> it's treated in transform node.
+ What about Quot, DivMod?
+*/
+
+/**
+ * equivalent_node() returns a node equivalent to input n. It skips all nodes that
+ * perform no actual computation, as, e.g., the Id nodes. It does not create
+ * new nodes. It is therefore safe to free n if the node returned is not n.
+ * If a node returns a Tuple we can not just skip it. If the size of the
+ * in array fits, we transform n into a tuple (e.g., Div).
+ */
+ir_node *
+equivalent_node (ir_node *n)
+{
+ if (n->op->equivalent_node)
+ return n->op->equivalent_node(n);
+ return n;
+}
+
+/**
+ * set the default equivalent node operation
+ */
+static ir_op *firm_set_default_equivalent_node(ir_op *op)
+{
+#define CASE(a) \
+ case iro_##a: \
+ op->equivalent_node = equivalent_node_##a; \
+ break
+
+ switch (op->code) {
+ CASE(Block);
+ CASE(Jmp);
+ CASE(Cond);
+ CASE(Or);
+ CASE(Add);
+ CASE(Eor);
+ CASE(Sub);
+ CASE(Shl);
+ CASE(Shr);
+ CASE(Shrs);
+ CASE(Rot);
+ CASE(Not);
+ CASE(Minus);
+ CASE(Mul);
+ CASE(Div);
+ CASE(And);
+ CASE(Conv);
+ CASE(Phi);
+ CASE(Load);
+ CASE(Store);
+ CASE(Proj);
+ CASE(Id);
+ default:
+ op->equivalent_node = NULL;
+ }
+
+ return op;
+#undef CASE
+}
/**
* Do node specific optimizations of nodes predecessors.
} /* end switch */
}
+static ir_node *transform_node_Div(ir_node *n)
+{
+ tarval *ta = computed_value(n);
-/**
- * Tries several [inplace] [optimizing] transformations and returns an
- * equivalent node. The difference to equivalent_node() is that these
- * transformations _do_ generate new nodes, and thus the old node must
- * not be freed even if the equivalent node isn't the old one.
- */
-static ir_node *
-transform_node (ir_node *n) {
- ir_node *a = NULL, *b;
- tarval *ta, *tb;
+ if (ta != tarval_bad) {
+ /* Turn Div into a tuple (mem, bad, value) */
+ ir_node *mem = get_Div_mem(n);
- switch (get_irn_opcode(n)) {
- case iro_Div: {
- ta = computed_value(n);
- if (ta != tarval_bad) {
- /* Turn Div into a tuple (mem, bad, value) */
- ir_node *mem = get_Div_mem(n);
- turn_into_tuple(n, 3);
- set_Tuple_pred(n, 0, mem);
- set_Tuple_pred(n, 1, new_Bad());
- set_Tuple_pred(n, 2, new_Const(get_tarval_mode(ta), ta));
- }
- } break;
- case iro_Mod: {
- ta = computed_value(n);
- if (ta != tarval_bad) {
- /* Turn Mod into a tuple (mem, bad, value) */
- ir_node *mem = get_Mod_mem(n);
- turn_into_tuple(n, 3);
- set_Tuple_pred(n, 0, mem);
- set_Tuple_pred(n, 1, new_Bad());
- set_Tuple_pred(n, 2, new_Const(get_tarval_mode(ta), ta));
- }
- } break;
- case iro_DivMod: {
+ turn_into_tuple(n, 3);
+ set_Tuple_pred(n, 0, mem);
+ set_Tuple_pred(n, 1, new_Bad());
+ set_Tuple_pred(n, 2, new_Const(get_tarval_mode(ta), ta));
+ }
+ return n;
+}
- int evaluated = 0;
- ir_mode *mode;
+static ir_node *transform_node_Mod(ir_node *n)
+{
+ tarval *ta = computed_value(n);
+
+ if (ta != tarval_bad) {
+ /* Turn Mod into a tuple (mem, bad, value) */
+ ir_node *mem = get_Mod_mem(n);
+ turn_into_tuple(n, 3);
+ set_Tuple_pred(n, 0, mem);
+ set_Tuple_pred(n, 1, new_Bad());
+ set_Tuple_pred(n, 2, new_Const(get_tarval_mode(ta), ta));
+ }
+ return n;
+}
- a = get_DivMod_left(n);
- b = get_DivMod_right(n);
- mode = get_irn_mode(a);
+static ir_node *transform_node_DivMod(ir_node *n)
+{
+ int evaluated = 0;
- if (!(mode_is_int(get_irn_mode(a)) &&
- mode_is_int(get_irn_mode(b))))
- break;
+ ir_node *a = get_DivMod_left(n);
+ ir_node *b = get_DivMod_right(n);
+ ir_mode *mode = get_irn_mode(a);
- if (a == b) {
- a = new_Const (mode, get_mode_one(mode));
- b = new_Const (mode, get_mode_null(mode));
- evaluated = 1;
- } else {
- ta = value_of(a);
- tb = value_of(b);
-
- if (tb != tarval_bad) {
- if (tb == get_mode_one(get_tarval_mode(tb))) {
- b = new_Const (mode, get_mode_null(mode));
- evaluated = 1;
- } else if (ta != tarval_bad) {
- tarval *resa, *resb;
- resa = tarval_div (ta, tb);
- if (resa == tarval_bad) break; /* Causes exception!!! Model by replacing through
- Jmp for X result!? */
- resb = tarval_mod (ta, tb);
- if (resb == tarval_bad) break; /* Causes exception! */
- a = new_Const (mode, resa);
- b = new_Const (mode, resb);
- evaluated = 1;
- }
- } else if (ta == get_mode_null(get_tarval_mode(ta))) {
- b = a;
+ if (!(mode_is_int(mode) && mode_is_int(get_irn_mode(b))))
+ return n;
+
+ if (a == b) {
+ a = new_Const(mode, get_mode_one(mode));
+ b = new_Const(mode, get_mode_null(mode));
+ evaluated = 1;
+ } else {
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ if (tb != tarval_bad) {
+ if (tb == get_mode_one(get_tarval_mode(tb))) {
+ b = new_Const (mode, get_mode_null(mode));
+ evaluated = 1;
+ } else if (ta != tarval_bad) {
+ tarval *resa, *resb;
+ resa = tarval_div (ta, tb);
+ if (resa == tarval_bad) return n; /* Causes exception!!! Model by replacing through
+ Jmp for X result!? */
+ resb = tarval_mod (ta, tb);
+ if (resb == tarval_bad) return n; /* Causes exception! */
+ a = new_Const (mode, resa);
+ b = new_Const (mode, resb);
evaluated = 1;
}
- }
- if (evaluated) { /* replace by tuple */
- ir_node *mem = get_DivMod_mem(n);
- turn_into_tuple(n, 4);
- set_Tuple_pred(n, 0, mem);
- set_Tuple_pred(n, 1, new_Bad()); /* no exception */
- set_Tuple_pred(n, 2, a);
- set_Tuple_pred(n, 3, b);
- assert(get_nodes_Block(n));
+ } else if (ta == get_mode_null(get_tarval_mode(ta))) {
+ b = a;
+ evaluated = 1;
}
}
- break;
-
- case iro_Cond: {
- /* Replace the Cond by a Jmp if it branches on a constant
- condition. */
- ir_node *jmp;
- a = get_Cond_selector(n);
- ta = value_of(a);
-
- if ((ta != tarval_bad) &&
- (get_irn_mode(a) == mode_b) &&
- (get_opt_unreachable_code())) {
- /* It's a boolean Cond, branching on a boolean constant.
- Replace it by a tuple (Bad, Jmp) or (Jmp, Bad) */
- jmp = new_r_Jmp(current_ir_graph, get_nodes_Block(n));
- turn_into_tuple(n, 2);
- if (ta == tarval_b_true) {
- set_Tuple_pred(n, 0, new_Bad());
- set_Tuple_pred(n, 1, jmp);
- } else {
- set_Tuple_pred(n, 0, jmp);
- set_Tuple_pred(n, 1, new_Bad());
- }
- /* We might generate an endless loop, so keep it alive. */
- add_End_keepalive(get_irg_end(current_ir_graph), get_nodes_Block(n));
- } else if ((ta != tarval_bad) &&
- (get_irn_mode(a) == mode_Iu) &&
- (get_Cond_kind(n) == dense) &&
- (get_opt_unreachable_code())) {
- /* I don't want to allow Tuples smaller than the biggest Proj.
- Also this tuple might get really big...
- I generate the Jmp here, and remember it in link. Link is used
- when optimizing Proj. */
- set_irn_link(n, new_r_Jmp(current_ir_graph, get_nodes_Block(n)));
- /* We might generate an endless loop, so keep it alive. */
- add_End_keepalive(get_irg_end(current_ir_graph), get_nodes_Block(n));
- } else if ((get_irn_op(a) == op_Eor)
- && (get_irn_mode(a) == mode_b)
- && (tarval_classify(computed_value(get_Eor_right(a))) == TV_CLASSIFY_ONE)) {
- /* The Eor is a negate. Generate a new Cond without the negate,
- simulate the negate by exchanging the results. */
- set_irn_link(n, new_r_Cond(current_ir_graph, get_nodes_Block(n),
- get_Eor_left(a)));
- } else if ((get_irn_op(a) == op_Not)
- && (get_irn_mode(a) == mode_b)) {
- /* A Not before the Cond. Generate a new Cond without the Not,
- simulate the Not by exchanging the results. */
- set_irn_link(n, new_r_Cond(current_ir_graph, get_nodes_Block(n),
- get_Not_op(a)));
- }
+ if (evaluated) { /* replace by tuple */
+ ir_node *mem = get_DivMod_mem(n);
+ turn_into_tuple(n, 4);
+ set_Tuple_pred(n, 0, mem);
+ set_Tuple_pred(n, 1, new_Bad()); /* no exception */
+ set_Tuple_pred(n, 2, a);
+ set_Tuple_pred(n, 3, b);
+ assert(get_nodes_Block(n));
}
- break;
-
- case iro_Proj: {
- a = get_Proj_pred(n);
-
- if ((get_irn_op(a) == op_Cond)
- && get_irn_link(a)
- && get_irn_op(get_irn_link(a)) == op_Cond) {
- /* Use the better Cond if the Proj projs from a Cond which get's
- its result from an Eor/Not. */
- assert (((get_irn_op(get_Cond_selector(a)) == op_Eor)
- || (get_irn_op(get_Cond_selector(a)) == op_Not))
- && (get_irn_mode(get_Cond_selector(a)) == mode_b)
- && (get_irn_op(get_irn_link(a)) == op_Cond)
- && (get_Cond_selector(get_irn_link(a)) == get_Eor_left(get_Cond_selector(a))));
- set_Proj_pred(n, get_irn_link(a));
- if (get_Proj_proj(n) == 0)
- set_Proj_proj(n, 1);
- else
- set_Proj_proj(n, 0);
- } else if ((get_irn_op(a) == op_Cond)
- && (get_irn_mode(get_Cond_selector(a)) == mode_Iu)
- && value_of(a)
- && (get_Cond_kind(a) == dense)
- && (get_opt_unreachable_code())) {
- /* The Cond is a Switch on a Constant */
- if (get_Proj_proj(n) == tarval_to_long(value_of(a))) {
- /* The always taken branch, reuse the existing Jmp. */
- if (!get_irn_link(a)) /* well, if it exists ;-> */
- set_irn_link(a, new_r_Jmp(current_ir_graph, get_nodes_Block(n)));
- assert(get_irn_op(get_irn_link(a)) == op_Jmp);
- n = get_irn_link(a);
- } else {/* Not taken control flow, but be careful with the default! */
- if (get_Proj_proj(n) < a->attr.c.default_proj){
- /* a never taken branch */
- n = new_Bad();
- } else {
- a->attr.c.default_proj = get_Proj_proj(n);
- }
- }
+
+ return n;
+}
+
+static ir_node *transform_node_Cond(ir_node *n)
+{
+ /* Replace the Cond by a Jmp if it branches on a constant
+ condition. */
+ ir_node *jmp;
+ ir_node *a = get_Cond_selector(n);
+ tarval *ta = value_of(a);
+
+ if ((ta != tarval_bad) &&
+ (get_irn_mode(a) == mode_b) &&
+ (get_opt_unreachable_code())) {
+ /* It's a boolean Cond, branching on a boolean constant.
+ Replace it by a tuple (Bad, Jmp) or (Jmp, Bad) */
+ jmp = new_r_Jmp(current_ir_graph, get_nodes_Block(n));
+ turn_into_tuple(n, 2);
+ if (ta == tarval_b_true) {
+ set_Tuple_pred(n, 0, new_Bad());
+ set_Tuple_pred(n, 1, jmp);
+ } else {
+ set_Tuple_pred(n, 0, jmp);
+ set_Tuple_pred(n, 1, new_Bad());
}
- } break;
- case iro_Eor: { /* @@@ not tested as boolean Eor not allowed any more. */
- a = get_Eor_left(n);
- b = get_Eor_right(n);
-
- if ((get_irn_mode(n) == mode_b)
- && (get_irn_op(a) == op_Proj)
- && (get_irn_mode(a) == mode_b)
- && (tarval_classify (computed_value (b)) == TV_CLASSIFY_ONE)
- && (get_irn_op(get_Proj_pred(a)) == op_Cmp))
- /* The Eor negates a Cmp. The Cmp has the negated result anyways! */
- n = new_r_Proj(current_ir_graph, get_nodes_Block(n), get_Proj_pred(a),
- mode_b, get_negated_pnc(get_Proj_proj(a)));
- else if ((get_irn_mode(n) == mode_b)
- && (tarval_classify (computed_value (b)) == TV_CLASSIFY_ONE))
- /* The Eor is a Not. Replace it by a Not. */
- /* ????!!!Extend to bitfield 1111111. */
- n = new_r_Not(current_ir_graph, get_nodes_Block(n), a, mode_b);
- }
- break;
- case iro_Not: {
- a = get_Not_op(n);
-
- if ( (get_irn_mode(n) == mode_b)
- && (get_irn_op(a) == op_Proj)
- && (get_irn_mode(a) == mode_b)
- && (get_irn_op(get_Proj_pred(a)) == op_Cmp))
- /* We negate a Cmp. The Cmp has the negated result anyways! */
- n = new_r_Proj(current_ir_graph, get_nodes_Block(n), get_Proj_pred(a),
- mode_b, get_negated_pnc(get_Proj_proj(a)));
- }
- break;
- default: ;
+ /* We might generate an endless loop, so keep it alive. */
+ add_End_keepalive(get_irg_end(current_ir_graph), get_nodes_Block(n));
+ } else if ((ta != tarval_bad) &&
+ (get_irn_mode(a) == mode_Iu) &&
+ (get_Cond_kind(n) == dense) &&
+ (get_opt_unreachable_code())) {
+ /* I don't want to allow Tuples smaller than the biggest Proj.
+ Also this tuple might get really big...
+ I generate the Jmp here, and remember it in link. Link is used
+ when optimizing Proj. */
+ set_irn_link(n, new_r_Jmp(current_ir_graph, get_nodes_Block(n)));
+ /* We might generate an endless loop, so keep it alive. */
+ add_End_keepalive(get_irg_end(current_ir_graph), get_nodes_Block(n));
+ } else if ((get_irn_op(a) == op_Eor)
+ && (get_irn_mode(a) == mode_b)
+ && (tarval_classify(computed_value(get_Eor_right(a))) == TV_CLASSIFY_ONE)) {
+ /* The Eor is a negate. Generate a new Cond without the negate,
+ simulate the negate by exchanging the results. */
+ set_irn_link(n, new_r_Cond(current_ir_graph, get_nodes_Block(n),
+ get_Eor_left(a)));
+ } else if ((get_irn_op(a) == op_Not)
+ && (get_irn_mode(a) == mode_b)) {
+ /* A Not before the Cond. Generate a new Cond without the Not,
+ simulate the Not by exchanging the results. */
+ set_irn_link(n, new_r_Cond(current_ir_graph, get_nodes_Block(n),
+ get_Not_op(a)));
}
return n;
}
+static ir_node *transform_node_Eor(ir_node *n)
+{
+ ir_node *a = get_Eor_left(n);
+ ir_node *b = get_Eor_right(n);
+
+ if ((get_irn_mode(n) == mode_b)
+ && (get_irn_op(a) == op_Proj)
+ && (get_irn_mode(a) == mode_b)
+ && (tarval_classify (computed_value (b)) == TV_CLASSIFY_ONE)
+ && (get_irn_op(get_Proj_pred(a)) == op_Cmp))
+ /* The Eor negates a Cmp. The Cmp has the negated result anyways! */
+ n = new_r_Proj(current_ir_graph, get_nodes_Block(n), get_Proj_pred(a),
+ mode_b, get_negated_pnc(get_Proj_proj(a)));
+ else if ((get_irn_mode(n) == mode_b)
+ && (tarval_classify (computed_value (b)) == TV_CLASSIFY_ONE))
+ /* The Eor is a Not. Replace it by a Not. */
+ /* ????!!!Extend to bitfield 1111111. */
+ n = new_r_Not(current_ir_graph, get_nodes_Block(n), a, mode_b);
+
+ return n;
+}
+
+static ir_node *transform_node_Not(ir_node *n)
+{
+ ir_node *a = get_Not_op(n);
+
+ if ( (get_irn_mode(n) == mode_b)
+ && (get_irn_op(a) == op_Proj)
+ && (get_irn_mode(a) == mode_b)
+ && (get_irn_op(get_Proj_pred(a)) == op_Cmp))
+ /* We negate a Cmp. The Cmp has the negated result anyways! */
+ n = new_r_Proj(current_ir_graph, get_nodes_Block(n), get_Proj_pred(a),
+ mode_b, get_negated_pnc(get_Proj_proj(a)));
+
+ return n;
+}
+
+
+/**
+ * Tries several [inplace] [optimizing] transformations and returns an
+ * equivalent node. The difference to equivalent_node() is that these
+ * transformations _do_ generate new nodes, and thus the old node must
+ * not be freed even if the equivalent node isn't the old one.
+ */
+static ir_node *transform_node(ir_node *n)
+{
+ if (n->op->transform_node)
+ n = n->op->transform_node(n);
+ return n;
+}
+
+/**
+ * set the default transform node operation
+ */
+static ir_op *firm_set_default_transform_node(ir_op *op)
+{
+#define CASE(a) \
+ case iro_##a: \
+ op->transform_node = transform_node_##a; \
+ break
+
+ switch (op->code) {
+ CASE(Div);
+ CASE(Mod);
+ CASE(DivMod);
+ CASE(Cond);
+ CASE(Eor);
+ CASE(Not);
+ default:
+ op->transform_node = NULL;
+ }
+
+ return op;
+#undef CASE
+}
+
+
/* **************** Common Subexpression Elimination **************** */
/** The size of the hash table used, should estimate the number of nodes
in a graph. */
#define N_IR_NODES 512
+static int node_cmp_attr_Const(ir_node *a, ir_node *b)
+{
+ return (get_Const_tarval(a) != get_Const_tarval(b))
+ || (get_Const_type(a) != get_Const_type(b));
+}
+
+static int node_cmp_attr_Proj(ir_node *a, ir_node *b)
+{
+ return get_irn_proj_attr (a) != get_irn_proj_attr (b);
+}
+
+static int node_cmp_attr_Filter(ir_node *a, ir_node *b)
+{
+ return get_Filter_proj(a) != get_Filter_proj(b);
+}
+
+static int node_cmp_attr_Alloc(ir_node *a, ir_node *b)
+{
+ return (get_irn_alloc_attr(a).where != get_irn_alloc_attr(b).where)
+ || (get_irn_alloc_attr(a).type != get_irn_alloc_attr(b).type);
+}
+
+static int node_cmp_attr_Free(ir_node *a, ir_node *b)
+{
+ return (get_irn_free_attr(a) != get_irn_free_attr(b));
+}
+
+static int node_cmp_attr_SymConst(ir_node *a, ir_node *b)
+{
+ return (get_irn_symconst_attr(a).num != get_irn_symconst_attr(b).num)
+ || (get_irn_symconst_attr(a).tori.typ != get_irn_symconst_attr(b).tori.typ);
+}
+
+static int node_cmp_attr_Call(ir_node *a, ir_node *b)
+{
+ return (get_irn_call_attr(a) != get_irn_call_attr(b));
+}
+
+static int node_cmp_attr_FuncCall(ir_node *a, ir_node *b)
+{
+ return (get_irn_funccall_attr(a) != get_irn_funccall_attr(b));
+}
+
+static int node_cmp_attr_Sel(ir_node *a, ir_node *b)
+{
+ return (get_irn_sel_attr(a).ent->kind != get_irn_sel_attr(b).ent->kind)
+ || (get_irn_sel_attr(a).ent->name != get_irn_sel_attr(b).ent->name)
+ || (get_irn_sel_attr(a).ent->owner != get_irn_sel_attr(b).ent->owner)
+ || (get_irn_sel_attr(a).ent->ld_name != get_irn_sel_attr(b).ent->ld_name)
+ || (get_irn_sel_attr(a).ent->type != get_irn_sel_attr(b).ent->type);
+}
+
+static int node_cmp_attr_Phi(ir_node *a, ir_node *b)
+{
+ return get_irn_phi_attr (a) != get_irn_phi_attr (b);
+}
+
+static int node_cmp_attr_Cast(ir_node *a, ir_node *b)
+{
+ return get_Cast_type(a) != get_Cast_type(b);
+}
+
+/**
+ * set the default node attribute compare operation
+ */
+static ir_op *firm_set_default_node_cmp_attr(ir_op *op)
+{
+#define CASE(a) \
+ case iro_##a: \
+ op->node_cmp_attr = node_cmp_attr_##a; \
+ break
+
+ switch (op->code) {
+ CASE(Const);
+ CASE(Proj);
+ CASE(Filter);
+ CASE(Alloc);
+ CASE(Free);
+ CASE(SymConst);
+ CASE(Call);
+ CASE(FuncCall);
+ CASE(Sel);
+ default:
+ op->node_cmp_attr = NULL;
+ }
+
+ return op;
+#undef CASE
+}
+
/**
* Compare function for two nodes in the hash table. Gets two
* nodes as parameters. Returns 0 if the nodes are a cse.
if (get_irn_n(a, i) != get_irn_n(b, i))
return 1;
- switch (get_irn_opcode(a)) {
- case iro_Const:
- return (get_Const_tarval(a) != get_Const_tarval(b))
- || (get_Const_type(a) != get_Const_type(b));
- case iro_Proj:
- return get_irn_proj_attr (a) != get_irn_proj_attr (b);
- case iro_Filter:
- return get_Filter_proj(a) != get_Filter_proj(b);
- case iro_Alloc:
- return (get_irn_alloc_attr(a).where != get_irn_alloc_attr(b).where)
- || (get_irn_alloc_attr(a).type != get_irn_alloc_attr(b).type);
- case iro_Free:
- return (get_irn_free_attr(a) != get_irn_free_attr(b));
- case iro_SymConst:
- return (get_irn_symconst_attr(a).num != get_irn_symconst_attr(b).num)
- || (get_irn_symconst_attr(a).tori.typ != get_irn_symconst_attr(b).tori.typ);
- case iro_Call:
- return (get_irn_call_attr(a) != get_irn_call_attr(b));
- case iro_Sel:
- return (get_irn_sel_attr(a).ent->kind != get_irn_sel_attr(b).ent->kind)
- || (get_irn_sel_attr(a).ent->name != get_irn_sel_attr(b).ent->name)
- || (get_irn_sel_attr(a).ent->owner != get_irn_sel_attr(b).ent->owner)
- || (get_irn_sel_attr(a).ent->ld_name != get_irn_sel_attr(b).ent->ld_name)
- || (get_irn_sel_attr(a).ent->type != get_irn_sel_attr(b).ent->type);
- case iro_Phi:
- return get_irn_phi_attr (a) != get_irn_phi_attr (b);
- case iro_Cast:
- return get_Cast_type(a) != get_Cast_type(b);
- default: ;
- }
+ /*
+ * here, we already now that the nodes are identical except their
+ * attributes
+ */
+ if (a->op->node_cmp_attr)
+ return a->op->node_cmp_attr(a, b);
return 0;
}
set_irg_dom_inconsistent(current_ir_graph);
return optimize_in_place_2 (n);
}
+
+/**
+ * set the default ir op operations
+ */
+ir_op *firm_set_default_operations(ir_op *op)
+{
+ op = firm_set_default_computed_value(op);
+ op = firm_set_default_equivalent_node(op);
+ op = firm_set_default_transform_node(op);
+ op = firm_set_default_node_cmp_attr(op);
+
+ return op;
+}