/*
- * 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.
*
ir_node *a = get_Minus_op(n);
tarval *ta = value_of(a);
- if ((ta != tarval_bad) && mode_is_signed(get_irn_mode(a)))
+ if (ta != tarval_bad)
return tarval_neg(ta);
return tarval_bad;
ir_node *aba = skip_Id(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))
+ is_Proj(aa)
+ && mode_is_reference(get_irn_mode(aa))
+ && is_Alloc(aaa))
&& ( (/* ab is NULL */
- (get_irn_op(ab) == op_Const)
- && (mode_is_reference(get_irn_mode(ab)))
- && (get_Const_tarval(ab) == get_mode_null(get_irn_mode(ab))))
+ is_Const(ab)
+ && mode_is_reference(get_irn_mode(ab))
+ && is_Const_null(ab))
|| (/* ab is other Alloc */
- (get_irn_op(ab) == op_Proj)
- && (mode_is_reference(get_irn_mode(ab)))
- && (get_irn_op(aba) == op_Alloc)
+ is_Proj(ab)
+ && mode_is_reference(get_irn_mode(ab))
+ && is_Alloc(aba)
&& (aaa != aba))))
|| (/* aa is NULL 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)))
+ is_Const(aa)
+ && mode_is_reference(get_irn_mode(aa))
+ && is_Const_null(aa)
+ && is_Proj(ab)
+ && mode_is_reference(get_irn_mode(ab))
+ && is_Alloc(aba)))
/* 3.: */
return new_tarval_from_long(proj_nr & pn_Cmp_Ne, mode_b);
}
static ir_node *equivalent_node_Block(ir_node *n)
{
ir_node *oldn = n;
- int n_preds = get_Block_n_cfgpreds(n);
+ int n_preds;
+
+ /* don't optimize dead blocks */
+ if (is_Block_dead(n))
+ return n;
+
+ n_preds = get_Block_n_cfgpreds(n);
- /* The Block constructor does not call optimize, but mature_immBlock
- calls the optimization. */
+ /* The Block constructor does not call optimize, but mature_immBlock()
+ calls the optimization. */
assert(get_Block_matured(n));
/* Straightening: a single entry Block following a single exit Block
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 ((n_preds == 1) && (get_irn_op(get_Block_cfgpred(n, 0)) == op_Jmp)) {
+ if (n_preds == 1 && is_Jmp(get_Block_cfgpred(n, 0))) {
ir_node *predblock = get_nodes_block(get_Block_cfgpred(n, 0));
if (predblock == oldn) {
/* Jmp jumps into the block it is in -- deal self cycle. */
n = predblock;
DBG_OPT_STG(oldn, n);
}
- } else if ((n_preds == 1) &&
- (get_irn_op(skip_Proj(get_Block_cfgpred(n, 0))) == op_Cond)) {
+ } else if (n_preds == 1 && is_Cond(skip_Proj(get_Block_cfgpred(n, 0)))) {
ir_node *predblock = get_Block_cfgpred_block(n, 0);
if (predblock == oldn) {
/* Jmp jumps into the block it is in -- deal self cycle. */
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) &&
+ if (is_Proj(a) &&
+ is_Proj(b) &&
(get_Proj_pred(a) == get_Proj_pred(b)) &&
- (get_irn_op(get_Proj_pred(a)) == op_Cond) &&
+ is_Cond(get_Proj_pred(a)) &&
(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. */
/**
* Eor is commutative and has neutral 0.
*/
-#define equivalent_node_Eor equivalent_node_neutral_zero
+static ir_node *equivalent_node_Eor(ir_node *n)
+{
+ ir_node *oldn = n;
+ ir_node *a;
+ ir_node *b;
+
+ n = equivalent_node_neutral_zero(n);
+ if (n != oldn) return n;
+
+ a = get_Eor_left(n);
+ b = get_Eor_right(n);
+
+ if (is_Eor(a)) {
+ ir_node *aa = get_Eor_left(a);
+ ir_node *ab = get_Eor_right(a);
+
+ if (aa == b) {
+ /* (a ^ b) ^ a -> b */
+ n = ab;
+ DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_EOR_A_B_A);
+ return n;
+ } else if (ab == b) {
+ /* (a ^ b) ^ b -> a */
+ n = aa;
+ DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_EOR_A_B_A);
+ return n;
+ }
+ }
+ if (is_Eor(b)) {
+ ir_node *ba = get_Eor_left(b);
+ ir_node *bb = get_Eor_right(b);
+
+ if (ba == a) {
+ /* a ^ (a ^ b) -> b */
+ n = bb;
+ DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_EOR_A_B_A);
+ return n;
+ } else if (bb == a) {
+ /* a ^ (b ^ a) -> b */
+ n = ba;
+ DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_EOR_A_B_A);
+ return n;
+ }
+ }
+
+ return n;
+}
/*
* Optimize a - 0 and (a - x) + x (for modes with wrap-around).
left = get_Add_left(n);
right = get_Add_right(n);
- if (get_irn_op(left) == op_Sub) {
+ if (is_Sub(left)) {
if (get_Sub_right(left) == right) {
/* (a - x) + x */
}
}
}
- if (get_irn_op(right) == op_Sub) {
+ if (is_Sub(right)) {
if (get_Sub_right(right) == left) {
/* x + (a - x) */
/**
- * Optimize an "idempotent unary op", ie op(op(n)) = n.
+ * Optimize an "self-inverse unary op", ie op(op(n)) = n.
*
* @todo
* -(-a) == a, but might overflow two times.
ir_node *b = get_Mul_right(n);
/* Mul is commutative and has again an other neutral element. */
- if (tarval_is_one(value_of(a))) {
+ if (is_Const(a) && is_Const_one(a)) {
n = b;
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_NEUTRAL_1);
- } else if (tarval_is_one(value_of(b))) {
+ } else if (is_Const(b) && is_Const_one(b)) {
n = a;
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_NEUTRAL_1);
}
ir_node *b = get_Div_right(n);
/* Div is not commutative. */
- if (tarval_is_one(value_of(b))) { /* div(x, 1) == x */
+ if (is_Const(b) && is_Const_one(b)) { /* div(x, 1) == x */
/* Turn Div into a tuple (mem, bad, a) */
ir_node *mem = get_Div_mem(n);
ir_node *blk = get_irn_n(n, -1);
ir_node *b = get_Quot_right(n);
/* Div is not commutative. */
- if (tarval_is_one(value_of(b))) { /* Quot(x, 1) == x */
+ if (is_Const(b) && is_Const_one(b)) { /* Quot(x, 1) == x */
/* Turn Quot into a tuple (mem, jmp, bad, a) */
ir_node *mem = get_Quot_mem(n);
ir_node *blk = get_irn_n(n, -1);
ir_node *b = get_DivMod_right(n);
/* Div is not commutative. */
- if (tarval_is_one(value_of(b))) { /* div(x, 1) == x */
+ if (is_Const(b) && is_Const_one(b)) { /* div(x, 1) == x */
/* Turn DivMod into a tuple (mem, jmp, bad, a, 0) */
ir_node *a = get_DivMod_left(n);
ir_node *mem = get_Div_mem(n);
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_AND);
return n;
}
- if (tarval_is_all_one(value_of(a))) {
+ if (is_Const(a) && is_Const_all_one(a)) {
n = b;
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_AND);
return n;
}
- if (tarval_is_all_one(value_of(b))) {
+ if (is_Const(b) && is_Const_all_one(b)) {
n = a;
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_AND);
return n;
static ir_node *equivalent_node_Conv(ir_node *n) {
ir_node *oldn = n;
ir_node *a = get_Conv_op(n);
- ir_node *b;
ir_mode *n_mode = get_irn_mode(n);
ir_mode *a_mode = get_irn_mode(a);
set_Conv_op(n, get_Conv_op(a));
return n;
}
- /* else both are strict conv, second is superflous */
- } else {
- /* leave strict floating point Conv's */
- return n;
+ /* else both are strict conv, second is superfluous */
+ } else if(is_Proj(a)) {
+ ir_node *pred = get_Proj_pred(a);
+ if(is_Load(pred)) {
+ /* loads always return with the exact precision of n_mode */
+ assert(get_Load_mode(pred) == n_mode);
+ return a;
+ }
}
+
+ /* leave strict floating point Conv's */
+ return n;
}
n = a;
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_CONV);
- } 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);
+ } else if (is_Conv(a)) { /* Conv(Conv(b)) */
+ ir_node *b = get_Conv_op(a);
+ ir_mode *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(oldn, a, b, n, FS_OPT_CONV);
} else if (mode_is_int(n_mode)) {
- if (smaller_mode(b_mode, a_mode)){
+ if (get_mode_size_bits(b_mode) <= get_mode_size_bits(a_mode)) {
n = b; /* ConvS(ConvL(xxxS(...))) == xxxS(...) */
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_CONV);
}
int i, n_preds;
ir_node *oldn = n;
- ir_node *block = NULL; /* to shutup gcc */
+ ir_node *block;
ir_node *first_val = NULL; /* to shutup gcc */
if (!get_opt_normalize()) return 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_Block_dead(block)) || /* Control dead */
(block == get_irg_start_block(current_ir_graph))) /* There should be no Phi nodes */
return new_Bad(); /* in the Start Block. */
* themselves.
*/
static ir_node *equivalent_node_Sync(ir_node *n) {
- int i, n_preds;
-
- ir_node *oldn = n;
- ir_node *first_val = NULL; /* to shutup gcc */
-
- if (!get_opt_normalize()) return n;
+ int arity = get_Sync_n_preds(n);
+ int i;
- n_preds = get_Sync_n_preds(n);
+ for (i = 0; i < arity;) {
+ ir_node *pred = get_Sync_pred(n, i);
+ int j;
- /* Find first non-self-referencing input */
- for (i = 0; i < n_preds; ++i) {
- first_val = get_Sync_pred(n, i);
- if ((first_val != n) /* not self pointer */ &&
- (! is_Bad(first_val))
- ) { /* value not dead */
- break; /* then found first value. */
+ /* Remove Bad predecessors */
+ if (is_Bad(pred)) {
+ del_Sync_n(n, i);
+ --arity;
+ continue;
}
- }
- if (i >= n_preds)
- /* A totally Bad or self-referencing Sync (we didn't break the above loop) */
- return new_Bad();
-
- /* search the rest of inputs, determine if any of these
- are non-self-referencing */
- while (++i < n_preds) {
- ir_node *scnd_val = get_Sync_pred(n, i);
- if ((scnd_val != n) &&
- (scnd_val != first_val) &&
- (! is_Bad(scnd_val))
- )
- break;
+ /* Remove duplicate predecessors */
+ for (j = 0;; ++j) {
+ if (j >= i) {
+ ++i;
+ break;
+ }
+ if (get_Sync_pred(n, j) == pred) {
+ del_Sync_n(n, i);
+ --arity;
+ break;
+ }
+ }
}
- if (i >= n_preds) {
- /* Fold, if no multiple distinct non-self-referencing inputs */
- n = first_val;
- DBG_OPT_SYNC(oldn, n);
- }
+ if (arity == 0) return new_Bad();
+ if (arity == 1) return get_Sync_pred(n, 0);
return n;
} /* equivalent_node_Sync */
ir_node *oldn = proj;
ir_node *a = get_Proj_pred(proj);
- if (get_irn_op(a) == op_Tuple) {
+ if (is_Tuple(a)) {
/* Remove the Tuple/Proj combination. */
if ( get_Proj_proj(proj) <= get_Tuple_n_preds(a) ) {
proj = get_Tuple_pred(a, get_Proj_proj(proj));
/* Remove dead control flow -- early gigo(). */
proj = new_Bad();
} else if (get_opt_ldst_only_null_ptr_exceptions()) {
- ir_op *op = get_irn_op(a);
-
- if (op == op_Load) {
+ if (is_Load(a)) {
/* get the Load address */
ir_node *addr = get_Load_ptr(a);
ir_node *blk = get_irn_n(a, -1);
} else
return new_r_Jmp(current_ir_graph, blk);
}
- } else if (op == op_Store) {
+ } else if (is_Store(a)) {
/* get the load/store address */
ir_node *addr = get_Store_ptr(a);
ir_node *blk = get_irn_n(a, -1);
n = get_Mux_true(n);
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_MUX_EQ);
}
- else if (get_irn_op(sel) == op_Proj && !mode_honor_signed_zeros(get_irn_mode(n))) {
+ else if (is_Proj(sel) && !mode_honor_signed_zeros(get_irn_mode(n))) {
ir_node *cmp = get_Proj_pred(sel);
long proj_nr = get_Proj_proj(sel);
- ir_node *b = get_Mux_false(n);
- ir_node *a = get_Mux_true(n);
+ ir_node *f = get_Mux_false(n);
+ ir_node *t = get_Mux_true(n);
/*
- * Note: normalization puts the constant on the right site,
- * so we check only one case.
- *
* Note further that these optimization work even for floating point
* with NaN's because -NaN == NaN.
* However, if +0 and -0 is handled differently, we cannot use the first one.
*/
- if (get_irn_op(cmp) == op_Cmp && get_Cmp_left(cmp) == a) {
- ir_node *cmp_r = get_Cmp_right(cmp);
- if (is_Const(cmp_r) && is_Const_null(cmp_r)) {
- /* Mux(a CMP 0, X, a) */
- if (get_irn_op(b) == op_Minus && get_Minus_op(b) == a) {
- /* Mux(a CMP 0, -a, a) */
- if (proj_nr == pn_Cmp_Eq) {
- /* Mux(a == 0, -a, a) ==> -a */
- n = b;
+ if (is_Cmp(cmp)) {
+ ir_node *const cmp_l = get_Cmp_left(cmp);
+ ir_node *const cmp_r = get_Cmp_right(cmp);
+
+ switch (proj_nr) {
+ case pn_Cmp_Eq:
+ if ((cmp_l == t && cmp_r == f) || /* Psi(t == f, t, f) -> f */
+ (cmp_l == f && cmp_r == t)) { /* Psi(f == t, t, f) -> f */
+ n = f;
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_MUX_TRANSFORM);
- } else if (proj_nr == pn_Cmp_Lg || proj_nr == pn_Cmp_Ne) {
- /* Mux(a != 0, -a, a) ==> a */
- n = a;
+ return n;
+ }
+ break;
+
+ case pn_Cmp_Lg:
+ case pn_Cmp_Ne:
+ if ((cmp_l == t && cmp_r == f) || /* Psi(t != f, t, f) -> t */
+ (cmp_l == f && cmp_r == t)) { /* Psi(f != t, t, f) -> t */
+ n = t;
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_MUX_TRANSFORM);
+ return n;
}
- } else if (is_Const(b) && is_Const_null(b)) {
- /* Mux(a CMP 0, 0, a) */
- if (proj_nr == pn_Cmp_Lg || proj_nr == pn_Cmp_Ne) {
- /* Mux(a != 0, 0, a) ==> a */
- n = a;
+ break;
+ }
+
+ /*
+ * Note: normalization puts the constant on the right side,
+ * so we check only one case.
+ */
+ if (cmp_l == t && is_Const(cmp_r) && is_Const_null(cmp_r)) {
+ /* Mux(t CMP 0, X, t) */
+ if (is_Minus(f) && get_Minus_op(f) == t) {
+ /* Mux(t CMP 0, -t, t) */
+ if (proj_nr == pn_Cmp_Eq) {
+ /* Mux(t == 0, -t, t) ==> -t */
+ n = f;
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_MUX_TRANSFORM);
- } else if (proj_nr == pn_Cmp_Eq) {
- /* Mux(a == 0, 0, a) ==> 0 */
- n = b;
+ } else if (proj_nr == pn_Cmp_Lg || proj_nr == pn_Cmp_Ne) {
+ /* Mux(t != 0, -t, t) ==> t */
+ n = t;
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_MUX_TRANSFORM);
}
}
ir_node *pred = get_Confirm_value(n);
pn_Cmp pnc = get_Confirm_cmp(n);
- if (get_irn_op(pred) == op_Confirm && pnc == get_Confirm_cmp(pred)) {
+ if (is_Confirm(pred) && pnc == get_Confirm_cmp(pred)) {
/*
* rare case: two identical Confirms one after another,
* replace the second one with the first.
* Optimize Bounds(idx, idx, upper) into idx.
*/
static ir_node *equivalent_node_Bound(ir_node *n) {
- ir_node *idx = get_Bound_index(n);
- ir_node *lower = get_Bound_lower(n);
+ ir_node *idx = get_Bound_index(n);
+ ir_node *pred = skip_Proj(idx);
int ret_tuple = 0;
- /* By definition lower < upper, so if idx == lower -->
- lower <= idx && idx < upper */
- if (idx == lower) {
- /* Turn Bound into a tuple (mem, jmp, bad, idx) */
- ret_tuple = 1;
- } else {
- ir_node *pred = skip_Proj(idx);
-
- if (get_irn_op(pred) == op_Bound) {
+ if (is_Bound(pred)) {
+ /*
+ * idx was Bounds checked in the same MacroBlock previously,
+ * it is still valid if lower <= pred_lower && pred_upper <= upper.
+ */
+ ir_node *lower = get_Bound_lower(n);
+ ir_node *upper = get_Bound_upper(n);
+ if (get_Bound_lower(pred) == lower &&
+ get_Bound_upper(pred) == upper &&
+ get_irn_MacroBlock(n) == get_irn_MacroBlock(pred)) {
/*
- * idx was Bounds_check previously, it is still valid if
- * lower <= pred_lower && pred_upper <= upper.
+ * One could expect that we simply return the previous
+ * Bound here. However, this would be wrong, as we could
+ * add an exception Proj to a new location then.
+ * So, we must turn in into a tuple.
*/
- ir_node *upper = get_Bound_upper(n);
- if (get_Bound_lower(pred) == lower &&
- get_Bound_upper(pred) == upper) {
- /*
- * One could expect that we simply return the previous
- * Bound here. However, this would be wrong, as we could
- * add an exception Proj to a new location then.
- * So, we must turn in into a tuple.
- */
- ret_tuple = 1;
- }
+ ret_tuple = 1;
}
}
if (ret_tuple) {
static int is_const_Phi(ir_node *n) {
int i;
- if (! is_Phi(n))
+ if (! is_Phi(n) || get_irn_arity(n) == 0)
return 0;
for (i = get_irn_arity(n) - 1; i >= 0; --i)
if (! is_Const(get_irn_n(n, i)))
* @param phi the Phi node
* @param other the other operand
* @param eval an evaluator function
+ * @param mode the mode of the result, may be different from the mode of the Phi!
* @param left if non-zero, other is the left operand, else the right
*
* @return a new Phi node if the conversion was successful, NULL else
*/
-static ir_node *apply_binop_on_phi(ir_node *phi, tarval *other, tarval *(*eval)(tarval *, tarval *), int left) {
+static ir_node *apply_binop_on_phi(ir_node *phi, tarval *other, tarval *(*eval)(tarval *, tarval *), ir_mode *mode, int left) {
tarval *tv;
void **res;
ir_node *pred;
- ir_mode *mode;
ir_graph *irg;
int i, n = get_irn_arity(phi);
res[i] = tv;
}
}
- mode = get_irn_mode(phi);
irg = current_ir_graph;
for (i = 0; i < n; ++i) {
pred = get_irn_n(phi, i);
return new_r_Phi(irg, get_nodes_block(phi), n, (ir_node **)res, mode);
} /* apply_binop_on_phi */
+/**
+ * Apply an evaluator on a binop with two constant Phi.
+ *
+ * @param a the left Phi node
+ * @param b the right Phi node
+ * @param eval an evaluator function
+ * @param mode the mode of the result, may be different from the mode of the Phi!
+ *
+ * @return a new Phi node if the conversion was successful, NULL else
+ */
+static ir_node *apply_binop_on_2_phis(ir_node *a, ir_node *b, tarval *(*eval)(tarval *, tarval *), ir_mode *mode) {
+ tarval *tv_l, *tv_r, *tv;
+ void **res;
+ ir_node *pred;
+ ir_graph *irg;
+ int i, n;
+
+ if (get_nodes_block(a) != get_nodes_block(b))
+ return NULL;
+
+ n = get_irn_arity(a);
+ NEW_ARR_A(void *, res, n);
+
+ for (i = 0; i < n; ++i) {
+ pred = get_irn_n(a, i);
+ tv_l = get_Const_tarval(pred);
+ pred = get_irn_n(b, i);
+ tv_r = get_Const_tarval(pred);
+ tv = eval(tv_l, tv_r);
+
+ if (tv == tarval_bad) {
+ /* folding failed, bad */
+ return NULL;
+ }
+ res[i] = tv;
+ }
+ irg = current_ir_graph;
+ for (i = 0; i < n; ++i) {
+ pred = get_irn_n(a, i);
+ res[i] = new_r_Const_type(irg, get_irg_start_block(irg), mode, res[i], get_Const_type(pred));
+ }
+ return new_r_Phi(irg, get_nodes_block(a), n, (ir_node **)res, mode);
+} /* apply_binop_on_2_phis */
+
/**
* Apply an evaluator on a unop with a constant operator (a Phi).
*
return new_r_Phi(irg, get_nodes_block(phi), n, (ir_node **)res, mode);
} /* apply_unop_on_phi */
+/**
+ * Apply a conversion on a constant operator (a Phi).
+ *
+ * @param phi the Phi node
+ *
+ * @return a new Phi node if the conversion was successful, NULL else
+ */
+static ir_node *apply_conv_on_phi(ir_node *phi, ir_mode *mode) {
+ tarval *tv;
+ void **res;
+ ir_node *pred;
+ ir_graph *irg;
+ int i, n = get_irn_arity(phi);
+
+ NEW_ARR_A(void *, res, n);
+ for (i = 0; i < n; ++i) {
+ pred = get_irn_n(phi, i);
+ tv = get_Const_tarval(pred);
+ tv = tarval_convert_to(tv, mode);
+
+ if (tv == tarval_bad) {
+ /* folding failed, bad */
+ return 0;
+ }
+ res[i] = tv;
+ }
+ irg = current_ir_graph;
+ for (i = 0; i < n; ++i) {
+ pred = get_irn_n(phi, i);
+ res[i] = new_r_Const_type(irg, get_irg_start_block(irg),
+ mode, res[i], get_Const_type(pred));
+ }
+ return new_r_Phi(irg, get_nodes_block(phi), n, (ir_node **)res, mode);
+} /* apply_conv_on_phi */
+
/**
* Transform AddP(P, ConvIs(Iu)), AddP(P, ConvIu(Is)) and
* SubP(P, ConvIs(Iu)), SubP(P, ConvIu(Is)).
ir_mode *mode = get_irn_mode(n);
if (mode_is_reference(mode)) {
- ir_node *left = get_binop_left(n);
- ir_node *right = get_binop_right(n);
- int ref_bits = get_mode_size_bits(mode);
+ ir_node *left = get_binop_left(n);
+ ir_node *right = get_binop_right(n);
+ unsigned ref_bits = get_mode_size_bits(mode);
- if (get_irn_op(left) == op_Conv) {
- ir_mode *mode = get_irn_mode(left);
- int bits = get_mode_size_bits(mode);
+ if (is_Conv(left)) {
+ ir_mode *lmode = get_irn_mode(left);
+ unsigned bits = get_mode_size_bits(lmode);
if (ref_bits == bits &&
- mode_is_int(mode) &&
- get_mode_arithmetic(mode) == irma_twos_complement) {
+ mode_is_int(lmode) &&
+ get_mode_arithmetic(lmode) == irma_twos_complement) {
ir_node *pre = get_Conv_op(left);
ir_mode *pre_mode = get_irn_mode(pre);
}
}
- if (get_irn_op(right) == op_Conv) {
- ir_mode *mode = get_irn_mode(right);
- int bits = get_mode_size_bits(mode);
+ if (is_Conv(right)) {
+ ir_mode *rmode = get_irn_mode(right);
+ unsigned bits = get_mode_size_bits(rmode);
if (ref_bits == bits &&
- mode_is_int(mode) &&
- get_mode_arithmetic(mode) == irma_twos_complement) {
+ mode_is_int(rmode) &&
+ get_mode_arithmetic(rmode) == irma_twos_complement) {
ir_node *pre = get_Conv_op(right);
ir_mode *pre_mode = get_irn_mode(pre);
}
}
}
+
+ /* let address arithmetic use unsigned modes */
+ if (is_Const(right)) {
+ ir_mode *rmode = get_irn_mode(right);
+
+ if (mode_is_signed(rmode) && get_mode_arithmetic(rmode) == irma_twos_complement) {
+ /* convert a AddP(P, *s) into AddP(P, *u) */
+ ir_mode *nm = get_reference_mode_unsigned_eq(mode);
+
+ ir_node *pre = new_r_Conv(current_ir_graph, get_nodes_block(n), right, nm);
+ set_binop_right(n, pre);
+ }
+ }
}
return n;
} /* transform_node_AddSub */
-#define HANDLE_BINOP_PHI(op,a,b,c) \
- c = NULL; \
- if (is_Const(b) && is_const_Phi(a)) { \
- /* check for Op(Phi, Const) */ \
- c = apply_binop_on_phi(a, get_Const_tarval(b), op, 0); \
- } \
- else if (is_Const(a) && is_const_Phi(b)) { \
- /* check for Op(Const, Phi) */ \
- c = apply_binop_on_phi(b, get_Const_tarval(a), op, 1); \
- } \
- if (c) { \
- DBG_OPT_ALGSIM0(oldn, c, FS_OPT_CONST_PHI); \
- return c; \
+#define HANDLE_BINOP_PHI(eval, a, b, c, mode) \
+ c = NULL; \
+ if (is_Const(b) && is_const_Phi(a)) { \
+ /* check for Op(Phi, Const) */ \
+ c = apply_binop_on_phi(a, get_Const_tarval(b), eval, mode, 0);\
+ } \
+ else if (is_Const(a) && is_const_Phi(b)) { \
+ /* check for Op(Const, Phi) */ \
+ c = apply_binop_on_phi(b, get_Const_tarval(a), eval, mode, 1);\
+ } \
+ else if (is_const_Phi(a) && is_const_Phi(b)) { \
+ /* check for Op(Phi, Phi) */ \
+ c = apply_binop_on_2_phis(a, b, eval, mode); \
+ } \
+ if (c) { \
+ DBG_OPT_ALGSIM0(oldn, c, FS_OPT_CONST_PHI); \
+ return c; \
}
-#define HANDLE_UNOP_PHI(op,a,c) \
+#define HANDLE_UNOP_PHI(eval, a, c) \
c = NULL; \
if (is_const_Phi(a)) { \
/* check for Op(Phi) */ \
- c = apply_unop_on_phi(a, op); \
+ c = apply_unop_on_phi(a, eval); \
if (c) { \
DBG_OPT_ALGSIM0(oldn, c, FS_OPT_CONST_PHI); \
return c; \
a = get_Add_left(n);
b = get_Add_right(n);
- HANDLE_BINOP_PHI(tarval_add, a,b,c);
-
mode = get_irn_mode(n);
+ HANDLE_BINOP_PHI(tarval_add, a, b, c, mode);
/* for FP these optimizations are only allowed if fp_strict_algebraic is disabled */
if (mode_is_float(mode) && (get_irg_fp_model(current_ir_graph) & fp_strict_algebraic))
if (mode_is_num(mode)) {
/* the following code leads to endless recursion when Mul are replaced by a simple instruction chain */
- if (!get_opt_arch_dep_running() && a == b && mode_is_int(mode)) {
+ if (!is_arch_dep_running() && a == b && mode_is_int(mode)) {
ir_node *block = get_irn_n(n, -1);
n = new_rd_Mul(
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_ADD_A_MINUS_B);
return n;
}
- if (! get_opt_reassociation()) {
- /* do NOT execute this code if reassociation is enabled, it does the inverse! */
- if (is_Mul(a)) {
- ir_node *ma = get_Mul_left(a);
- ir_node *mb = get_Mul_right(a);
-
- if (b == ma) {
- ir_node *blk = get_irn_n(n, -1);
- n = new_rd_Mul(
- get_irn_dbg_info(n), current_ir_graph, blk,
- ma,
- new_rd_Add(
- get_irn_dbg_info(n), current_ir_graph, blk,
- mb,
- new_r_Const_long(current_ir_graph, blk, mode, 1),
- mode),
- mode);
- DBG_OPT_ALGSIM0(oldn, n, FS_OPT_ADD_MUL_A_X_A);
- return n;
- } else if (b == mb) {
- ir_node *blk = get_irn_n(n, -1);
- n = new_rd_Mul(
- get_irn_dbg_info(n), current_ir_graph, blk,
- mb,
- new_rd_Add(
- get_irn_dbg_info(n), current_ir_graph, blk,
- ma,
- new_r_Const_long(current_ir_graph, blk, mode, 1),
- mode),
- mode);
- DBG_OPT_ALGSIM0(oldn, n, FS_OPT_ADD_MUL_A_X_A);
- return n;
- }
- }
- if (is_Mul(b)) {
- ir_node *ma = get_Mul_left(b);
- ir_node *mb = get_Mul_right(b);
-
- if (a == ma) {
- ir_node *blk = get_irn_n(n, -1);
- n = new_rd_Mul(
- get_irn_dbg_info(n), current_ir_graph, blk,
- ma,
- new_rd_Add(
- get_irn_dbg_info(n), current_ir_graph, blk,
- mb,
- new_r_Const_long(current_ir_graph, blk, mode, 1),
- mode),
- mode);
- DBG_OPT_ALGSIM0(oldn, n, FS_OPT_ADD_MUL_A_X_A);
- return n;
- }
- if (a == mb) {
- ir_node *blk = get_irn_n(n, -1);
- n = new_rd_Mul(
- get_irn_dbg_info(n), current_ir_graph, blk,
- mb,
- new_rd_Add(
- get_irn_dbg_info(n), current_ir_graph, blk,
- ma,
- new_r_Const_long(current_ir_graph, blk, mode, 1),
- mode),
- mode);
- DBG_OPT_ALGSIM0(oldn, n, FS_OPT_ADD_MUL_A_X_A);
- return n;
- }
- }
- }
if (get_mode_arithmetic(mode) == irma_twos_complement) {
/* Here we rely on constants be on the RIGHT side */
if (is_Not(a)) {
ir_node *op = get_Not_op(b);
if (op == a) {
- /* ~x + x = -1 */
+ /* x + ~x = -1 */
ir_node *blk = get_irn_n(n, -1);
n = new_r_Const(current_ir_graph, blk, mode, get_mode_minus_one(mode));
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_ADD_X_NOT_X);
return n;
} /* transform_node_Add */
-/* returns -cnst */
+/**
+ * returns -cnst or NULL if impossible
+ */
static ir_node *const_negate(ir_node *cnst) {
tarval *tv = tarval_neg(get_Const_tarval(cnst));
dbg_info *dbgi = get_irn_dbg_info(cnst);
mode = get_irn_mode(n);
restart:
- HANDLE_BINOP_PHI(tarval_sub, a,b,c);
+ HANDLE_BINOP_PHI(tarval_sub, a, b, c, mode);
/* for FP these optimizations are only allowed if fp_strict_algebraic is disabled */
if (mode_is_float(mode) && (get_irg_fp_model(current_ir_graph) & fp_strict_algebraic))
dbg_info *dbg = get_irn_dbg_info(n);
ir_node *block = get_nodes_block(n);
ir_node *left = get_Minus_op(a);
- ir_mode *mode = get_irn_mode(n);
ir_node *add = new_rd_Add(dbg, irg, block, left, b, mode);
n = new_rd_Minus(dbg, irg, block, add, mode);
dbg_info *dbg = get_irn_dbg_info(n);
ir_node *block = get_nodes_block(n);
ir_node *right = get_Minus_op(b);
- ir_mode *mode = get_irn_mode(n);
n = new_rd_Add(dbg, irg, block, a, right, mode);
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_SUB_MINUS);
ir_node *sub = new_rd_Sub(s_dbg, irg, s_block, s_left, s_right, s_mode);
dbg_info *a_dbg = get_irn_dbg_info(n);
ir_node *a_block = get_nodes_block(n);
- ir_mode *a_mode = get_irn_mode(n);
- n = new_rd_Add(a_dbg, irg, a_block, a, sub, a_mode);
+ n = new_rd_Add(a_dbg, irg, a_block, a, sub, mode);
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_SUB_TO_ADD);
return n;
} else if (is_Mul(b)) { /* a - (b * C) -> a + (b * -C) */
ir_node *mul = new_rd_Mul(m_dbg, irg, m_block, m_left, cnst2, m_mode);
dbg_info *a_dbg = get_irn_dbg_info(n);
ir_node *a_block = get_nodes_block(n);
- ir_mode *a_mode = get_irn_mode(n);
- n = new_rd_Add(a_dbg, irg, a_block, a, mul, a_mode);
+ n = new_rd_Add(a_dbg, irg, a_block, a, mul, mode);
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_SUB_TO_ADD);
return n;
}
if (mode == get_irn_mode(b)) {
ir_mode *ma, *mb;
-
- a = get_Conv_op(a);
- b = get_Conv_op(b);
+ ir_node *op_a = get_Conv_op(a);
+ ir_node *op_b = get_Conv_op(b);
/* check if it's allowed to skip the conv */
- ma = get_irn_mode(a);
- mb = get_irn_mode(b);
+ ma = get_irn_mode(op_a);
+ mb = get_irn_mode(op_b);
if (mode_is_reference(ma) && mode_is_reference(mb)) {
/* SubInt(ConvInt(aP), ConvInt(bP)) -> SubInt(aP,bP) */
+ a = op_a; b = op_b;
set_Sub_left(n, a);
set_Sub_right(n, b);
}
}
/* do NOT execute this code if reassociation is enabled, it does the inverse! */
- if (get_opt_reassociation() && get_irn_op(a) == op_Mul) {
+ if (!is_reassoc_running() && is_Mul(a)) {
ir_node *ma = get_Mul_left(a);
ir_node *mb = get_Mul_right(a);
return n;
}
}
- if (is_Sub(a)) {
- ir_node *x = get_Sub_left(a);
- ir_node *y = get_Sub_right(a);
- ir_node *blk = get_irn_n(n, -1);
- ir_mode *m_b = get_irn_mode(b);
- ir_mode *m_y = get_irn_mode(y);
+ if (is_Sub(a)) { /* (x - y) - b -> x - (y + b) */
+ ir_node *x = get_Sub_left(a);
+ ir_node *y = get_Sub_right(a);
+ ir_node *blk = get_irn_n(n, -1);
+ ir_mode *m_b = get_irn_mode(b);
+ ir_mode *m_y = get_irn_mode(y);
+ ir_mode *add_mode;
ir_node *add;
/* Determine the right mode for the Add. */
if (m_b == m_y)
- mode = m_b;
+ add_mode = m_b;
else if (mode_is_reference(m_b))
- mode = m_b;
+ add_mode = m_b;
else if (mode_is_reference(m_y))
- mode = m_y;
+ add_mode = m_y;
else {
/*
* Both modes are different but none is reference,
return n;
}
- add = new_r_Add(current_ir_graph, blk, y, b, mode);
+ add = new_r_Add(current_ir_graph, blk, y, b, add_mode);
n = new_rd_Sub(get_irn_dbg_info(n), current_ir_graph, blk, x, add, mode);
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_SUB_SUB_X_Y_Z);
ir_mode *smode = get_irn_mode(a);
if (ta == get_mode_one(smode)) {
+ /* (L)1 * (L)b = (L)b */
ir_node *blk = get_irn_n(n, -1);
n = new_rd_Conv(get_irn_dbg_info(n), current_ir_graph, blk, b, mode);
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_NEUTRAL_1);
return n;
}
else if (ta == get_mode_minus_one(smode)) {
+ /* (L)-1 * (L)b = (L)b */
ir_node *blk = get_irn_n(n, -1);
n = new_rd_Minus(get_irn_dbg_info(n), current_ir_graph, blk, b, smode);
n = new_rd_Conv(get_irn_dbg_info(n), current_ir_graph, blk, n, mode);
return n;
}
if (tb == get_mode_one(smode)) {
+ /* (L)a * (L)1 = (L)a */
ir_node *blk = get_irn_n(a, -1);
n = new_rd_Conv(get_irn_dbg_info(n), current_ir_graph, blk, a, mode);
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_NEUTRAL_1);
return n;
}
else if (tb == get_mode_minus_one(smode)) {
+ /* (L)a * (L)-1 = (L)-a */
ir_node *blk = get_irn_n(n, -1);
n = new_rd_Minus(get_irn_dbg_info(n), current_ir_graph, blk, a, smode);
n = new_rd_Conv(get_irn_dbg_info(n), current_ir_graph, blk, n, mode);
if (mode != get_irn_mode(a))
return transform_node_Mul2n(n, mode);
- HANDLE_BINOP_PHI(tarval_mul, a,b,c);
+ HANDLE_BINOP_PHI(tarval_mul, a, b, c, mode);
if (mode_is_signed(mode)) {
ir_node *r = NULL;
if (is_Const(a)) {
tarval *tv = get_Const_tarval(a);
if (tarval_ieee754_get_exponent(tv) == 1 && tarval_ieee754_zero_mantissa(tv)) {
- n = new_rd_Add(get_irn_dbg_info(n), current_ir_graph, get_irn_n(n, -1), b, b, mode);
+ /* 2.0 * b = b + b */
+ n = new_rd_Add(get_irn_dbg_info(n), current_ir_graph, get_nodes_block(n), b, b, mode);
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_ADD_A_A);
return n;
}
else if (is_Const(b)) {
tarval *tv = get_Const_tarval(b);
if (tarval_ieee754_get_exponent(tv) == 1 && tarval_ieee754_zero_mantissa(tv)) {
- n = new_rd_Add(get_irn_dbg_info(n), current_ir_graph, get_irn_n(n, -1), a, a, mode);
+ /* a * 2.0 = a + a */
+ n = new_rd_Add(get_irn_dbg_info(n), current_ir_graph, get_nodes_block(n), a, a, mode);
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_ADD_A_A);
return n;
}
* Transform a Div Node.
*/
static ir_node *transform_node_Div(ir_node *n) {
- tarval *tv = value_of(n);
ir_mode *mode = get_Div_resmode(n);
- ir_node *value = n;
+ ir_node *a = get_Div_left(n);
+ ir_node *b = get_Div_right(n);
+ ir_node *value;
+ tarval *tv;
+
+ if (is_Const(b) && is_const_Phi(a)) {
+ /* check for Div(Phi, Const) */
+ value = apply_binop_on_phi(a, get_Const_tarval(b), tarval_div, mode, 0);
+ if (value) {
+ DBG_OPT_ALGSIM0(n, value, FS_OPT_CONST_PHI);
+ goto make_tuple;
+ }
+ }
+ else if (is_Const(a) && is_const_Phi(b)) {
+ /* check for Div(Const, Phi) */
+ value = apply_binop_on_phi(b, get_Const_tarval(a), tarval_div, mode, 1);
+ if (value) {
+ DBG_OPT_ALGSIM0(n, value, FS_OPT_CONST_PHI);
+ goto make_tuple;
+ }
+ }
+ else if (is_const_Phi(a) && is_const_Phi(b)) {
+ /* check for Div(Phi, Phi) */
+ value = apply_binop_on_2_phis(a, b, tarval_div, mode);
+ if (value) {
+ DBG_OPT_ALGSIM0(n, value, FS_OPT_CONST_PHI);
+ goto make_tuple;
+ }
+ }
+ value = n;
+ tv = value_of(n);
if (tv != tarval_bad) {
value = new_Const(get_tarval_mode(tv), tv);
* Transform a Mod node.
*/
static ir_node *transform_node_Mod(ir_node *n) {
- tarval *tv = value_of(n);
ir_mode *mode = get_Mod_resmode(n);
- ir_node *value = n;
+ ir_node *a = get_Mod_left(n);
+ ir_node *b = get_Mod_right(n);
+ ir_node *value;
+ tarval *tv;
+
+ if (is_Const(b) && is_const_Phi(a)) {
+ /* check for Div(Phi, Const) */
+ value = apply_binop_on_phi(a, get_Const_tarval(b), tarval_mod, mode, 0);
+ if (value) {
+ DBG_OPT_ALGSIM0(n, value, FS_OPT_CONST_PHI);
+ goto make_tuple;
+ }
+ }
+ else if (is_Const(a) && is_const_Phi(b)) {
+ /* check for Div(Const, Phi) */
+ value = apply_binop_on_phi(b, get_Const_tarval(a), tarval_mod, mode, 1);
+ if (value) {
+ DBG_OPT_ALGSIM0(n, value, FS_OPT_CONST_PHI);
+ goto make_tuple;
+ }
+ }
+ else if (is_const_Phi(a) && is_const_Phi(b)) {
+ /* check for Div(Phi, Phi) */
+ value = apply_binop_on_2_phis(a, b, tarval_mod, mode);
+ if (value) {
+ DBG_OPT_ALGSIM0(n, value, FS_OPT_CONST_PHI);
+ goto make_tuple;
+ }
+ }
+ value = n;
+ tv = value_of(n);
if (tv != tarval_bad) {
value = new_Const(get_tarval_mode(tv), tv);
ir_node *a = get_DivMod_left(n);
ir_node *b = get_DivMod_right(n);
ir_mode *mode = get_DivMod_resmode(n);
- tarval *ta = value_of(a);
- tarval *tb = value_of(b);
+ tarval *ta, *tb;
int evaluated = 0;
+ ir_node *va, *vb;
+
+ if (is_Const(b) && is_const_Phi(a)) {
+ /* check for Div(Phi, Const) */
+ va = apply_binop_on_phi(a, get_Const_tarval(b), tarval_div, mode, 0);
+ vb = apply_binop_on_phi(a, get_Const_tarval(b), tarval_mod, mode, 0);
+ if (va && vb) {
+ DBG_OPT_ALGSIM0(n, va, FS_OPT_CONST_PHI);
+ DBG_OPT_ALGSIM0(n, vb, FS_OPT_CONST_PHI);
+ goto make_tuple;
+ }
+ }
+ else if (is_Const(a) && is_const_Phi(b)) {
+ /* check for Div(Const, Phi) */
+ va = apply_binop_on_phi(b, get_Const_tarval(a), tarval_div, mode, 1);
+ vb = apply_binop_on_phi(b, get_Const_tarval(a), tarval_mod, mode, 1);
+ if (va && vb) {
+ DBG_OPT_ALGSIM0(n, va, FS_OPT_CONST_PHI);
+ DBG_OPT_ALGSIM0(n, vb, FS_OPT_CONST_PHI);
+ goto make_tuple;
+ }
+ }
+ else if (is_const_Phi(a) && is_const_Phi(b)) {
+ /* check for Div(Phi, Phi) */
+ va = apply_binop_on_2_phis(a, b, tarval_div, mode);
+ vb = apply_binop_on_2_phis(a, b, tarval_mod, mode);
+ if (va && vb) {
+ DBG_OPT_ALGSIM0(n, va, FS_OPT_CONST_PHI);
+ DBG_OPT_ALGSIM0(n, vb, FS_OPT_CONST_PHI);
+ goto make_tuple;
+ }
+ }
+ 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));
- DBG_OPT_CSTEVAL(n, b);
+ va = a;
+ vb = new_Const(mode, get_mode_null(mode));
+ DBG_OPT_CSTEVAL(n, vb);
goto make_tuple;
} else if (ta != tarval_bad) {
tarval *resa, *resb;
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);
- DBG_OPT_CSTEVAL(n, a);
- DBG_OPT_CSTEVAL(n, b);
+ va = new_Const(mode, resa);
+ vb = new_Const(mode, resb);
+ DBG_OPT_CSTEVAL(n, va);
+ DBG_OPT_CSTEVAL(n, vb);
goto make_tuple;
} else if (mode_is_signed(mode) && tb == get_mode_minus_one(mode)) {
- a = new_rd_Minus(get_irn_dbg_info(n), current_ir_graph, get_irn_n(n, -1), a, mode);
- b = new_Const(mode, get_mode_null(mode));
- DBG_OPT_CSTEVAL(n, a);
- DBG_OPT_CSTEVAL(n, b);
+ va = new_rd_Minus(get_irn_dbg_info(n), current_ir_graph, get_irn_n(n, -1), a, mode);
+ vb = new_Const(mode, get_mode_null(mode));
+ DBG_OPT_CSTEVAL(n, va);
+ DBG_OPT_CSTEVAL(n, vb);
goto make_tuple;
} else { /* Try architecture dependent optimization */
- arch_dep_replace_divmod_by_const(&a, &b, n);
- evaluated = a != NULL;
+ va = a;
+ vb = b;
+ arch_dep_replace_divmod_by_const(&va, &vb, n);
+ evaluated = va != NULL;
}
} else if (a == b) {
if (value_not_zero(a, &dummy)) {
/* a/a && a != 0 */
- a = new_Const(mode, get_mode_one(mode));
- b = new_Const(mode, get_mode_null(mode));
- DBG_OPT_CSTEVAL(n, a);
- DBG_OPT_CSTEVAL(n, b);
+ va = new_Const(mode, get_mode_one(mode));
+ vb = new_Const(mode, get_mode_null(mode));
+ DBG_OPT_CSTEVAL(n, va);
+ DBG_OPT_CSTEVAL(n, vb);
goto make_tuple;
} else {
/* BEWARE: it is NOT possible to optimize a/a to 1, as this may cause a exception */
}
} else if (ta == get_mode_null(mode) && value_not_zero(b, &dummy)) {
/* 0 / non-Const = 0 */
- b = a;
+ vb = va = a;
goto make_tuple;
}
set_Tuple_pred(n, pn_DivMod_M, mem);
set_Tuple_pred(n, pn_DivMod_X_regular, new_r_Jmp(current_ir_graph, blk));
set_Tuple_pred(n, pn_DivMod_X_except, new_Bad()); /* no exception */
- set_Tuple_pred(n, pn_DivMod_res_div, a);
- set_Tuple_pred(n, pn_DivMod_res_mod, b);
+ set_Tuple_pred(n, pn_DivMod_res_div, va);
+ set_Tuple_pred(n, pn_DivMod_res_mod, vb);
}
return n;
if (is_Const(b)) {
tarval *tv = get_Const_tarval(b);
+ int rem;
+ /*
+ * Floating point constant folding might be disabled here to
+ * prevent rounding.
+ * However, as we check for exact result, doing it is safe.
+ * Switch it on.
+ */
+ rem = tarval_enable_fp_ops(1);
tv = tarval_quo(get_mode_one(mode), tv);
+ (void)tarval_enable_fp_ops(rem);
/* Do the transformation if the result is either exact or we are not
using strict rules. */
/**
* Optimize Abs(x) into x if x is Confirmed >= 0
* Optimize Abs(x) into -x if x is Confirmed <= 0
+ * Optimize Abs(-x) int Abs(x)
*/
static ir_node *transform_node_Abs(ir_node *n) {
- ir_node *oldn = n;
- ir_node *a = get_Abs_op(n);
- value_classify_sign sign = classify_value_sign(a);
+ ir_node *c, *oldn = n;
+ ir_node *a = get_Abs_op(n);
+ ir_mode *mode;
- if (sign == value_classified_negative) {
- ir_mode *mode = get_irn_mode(n);
+ HANDLE_UNOP_PHI(tarval_abs, a, c);
+
+ switch (classify_value_sign(a)) {
+ case value_classified_negative:
+ mode = get_irn_mode(n);
/*
* We can replace the Abs by -x here.
- * We even could add a new Confirm here.
+ * We even could add a new Confirm here
+ * (if not twos complement)
*
* Note that -x would create a new node, so we could
* not run it in the equivalent_node() context.
*/
n = new_rd_Minus(get_irn_dbg_info(n), current_ir_graph,
- get_irn_n(n, -1), a, mode);
+ get_nodes_block(n), a, mode);
DBG_OPT_CONFIRM(oldn, n);
- } else if (sign == value_classified_positive) {
+ return n;
+ case value_classified_positive:
/* n is positive, Abs is not needed */
n = a;
DBG_OPT_CONFIRM(oldn, n);
+ return n;
+ default:
+ break;
+ }
+ if (is_Minus(a)) {
+ /* Abs(-x) = Abs(x) */
+ mode = get_irn_mode(n);
+ n = new_rd_Abs(get_irn_dbg_info(n), current_ir_graph,
+ get_nodes_block(n), get_Minus_op(a), mode);
+ DBG_OPT_ALGSIM0(oldn, n, FS_OPT_ABS_MINUS_X);
+ return n;
}
-
return n;
} /* transform_node_Abs */
(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));
+ ir_node *blk = get_nodes_block(n);
+ jmp = new_r_Jmp(current_ir_graph, blk);
turn_into_tuple(n, pn_Cond_max);
if (ta == tarval_b_true) {
set_Tuple_pred(n, pn_Cond_false, new_Bad());
set_Tuple_pred(n, pn_Cond_true, 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));
+ add_End_keepalive(get_irg_end(current_ir_graph), blk);
}
return n;
} /* transform_node_Cond */
-typedef ir_node* (*recursive_transform) (ir_node *n);
+/**
+ * Prototype of a recursive transform function
+ * for bitwise distributive transformations.
+ */
+typedef ir_node* (*recursive_transform)(ir_node *n);
/**
* makes use of distributive laws for and, or, eor
ir_node *b_left = get_binop_left(b);
ir_node *b_right = get_binop_right(b);
ir_node *c = NULL;
- ir_node *op1, *op2;
+ ir_node *op1 = NULL;
+ ir_node *op2 = NULL;
if (is_op_commutative(op)) {
if (a_left == b_left) {
n = new_rd_And(dbgi, irg, blk, new_n, c, mode);
} else {
n = exact_copy(a);
- set_irn_n(n, -1, blk);
+ set_nodes_block(n, blk);
set_binop_left(n, new_n);
set_binop_right(n, c);
+ add_identities(current_ir_graph->value_table, n);
}
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_SHIFT_AND);
ir_node *b = get_And_right(n);
ir_mode *mode;
- HANDLE_BINOP_PHI(tarval_and, a,b,c);
-
mode = get_irn_mode(n);
+ HANDLE_BINOP_PHI(tarval_and, a, b, c, mode);
/* we can evaluate 2 Projs of the same Cmp */
if (mode == mode_b && is_Proj(a) && is_Proj(b)) {
dbg_info *dbg = get_irn_dbg_info(n);
ir_node *block = get_nodes_block(n);
- ar = new_rd_Minus(dbg, current_ir_graph, block, ar, mode);
+ ar = new_rd_Not(dbg, current_ir_graph, block, ar, mode);
n = new_rd_And(dbg, current_ir_graph, block, ar, b, mode);
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_EOR_TO_NOT);
return n;
dbg_info *dbg = get_irn_dbg_info(n);
ir_node *block = get_nodes_block(n);
- al = new_rd_Minus(dbg, current_ir_graph, block, al, mode);
+ al = new_rd_Not(dbg, current_ir_graph, block, al, mode);
n = new_rd_And(dbg, current_ir_graph, block, al, b, mode);
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_EOR_TO_NOT);
return n;
dbg_info *dbg = get_irn_dbg_info(n);
ir_node *block = get_nodes_block(n);
- br = new_rd_Minus(dbg, current_ir_graph, block, br, mode);
+ br = new_rd_Not(dbg, current_ir_graph, block, br, mode);
n = new_rd_And(dbg, current_ir_graph, block, br, a, mode);
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_EOR_TO_NOT);
return n;
dbg_info *dbg = get_irn_dbg_info(n);
ir_node *block = get_nodes_block(n);
- bl = new_rd_Minus(dbg, current_ir_graph, block, bl, mode);
+ bl = new_rd_Not(dbg, current_ir_graph, block, bl, mode);
n = new_rd_And(dbg, current_ir_graph, block, bl, a, mode);
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_EOR_TO_NOT);
return n;
ir_node *b = get_Eor_right(n);
ir_mode *mode = get_irn_mode(n);
- HANDLE_BINOP_PHI(tarval_eor, a,b,c);
+ HANDLE_BINOP_PHI(tarval_eor, a, b, c, mode);
/* we can evaluate 2 Projs of the same Cmp */
- if(get_irn_mode(n) == mode_b && is_Proj(a) && is_Proj(b)) {
+ if (mode == mode_b && is_Proj(a) && is_Proj(b)) {
ir_node *pred_a = get_Proj_pred(a);
ir_node *pred_b = get_Proj_pred(b);
if(pred_a == pred_b) {
n = new_rd_Const(get_irn_dbg_info(n), current_ir_graph, get_irn_n(n, -1),
mode, get_mode_null(mode));
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_EOR_A_A);
- } else if ((mode == mode_b)
- && (get_irn_op(a) == op_Proj)
- && (get_irn_mode(a) == mode_b)
- && tarval_is_one(value_of(b))
- && (get_irn_op(get_Proj_pred(a)) == op_Cmp)) {
+ } else if (mode == mode_b &&
+ is_Proj(a) &&
+ is_Const(b) && is_Const_one(b) &&
+ is_Cmp(get_Proj_pred(a))) {
/* The Eor negates a Cmp. The Cmp has the negated result anyways! */
n = new_r_Proj(current_ir_graph, get_irn_n(n, -1), get_Proj_pred(a),
mode_b, get_negated_pnc(get_Proj_proj(a), mode));
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_EOR_TO_NOT_BOOL);
- } else if (mode == mode_b && tarval_is_one(value_of(b))) {
- /* The Eor is a Not. Replace it by a Not. */
- /* ????!!!Extend to bitfield 1111111. */
- n = new_r_Not(current_ir_graph, get_irn_n(n, -1), a, mode_b);
-
- DBG_OPT_ALGSIM0(oldn, n, FS_OPT_EOR_TO_NOT);
+ } else if (is_Const(b)) {
+ if (is_Not(a)) { /* ~x ^ const -> x ^ ~const */
+ ir_node *cnst = new_Const(mode, tarval_not(get_Const_tarval(b)));
+ ir_node *not_op = get_Not_op(a);
+ dbg_info *dbg = get_irn_dbg_info(n);
+ ir_graph *irg = current_ir_graph;
+ ir_node *block = get_nodes_block(n);
+ ir_mode *mode = get_irn_mode(n);
+ n = new_rd_Eor(dbg, irg, block, not_op, cnst, mode);
+ return n;
+ } else if (is_Const_all_one(b)) { /* x ^ 1...1 -> ~1 */
+ n = new_r_Not(current_ir_graph, get_nodes_block(n), a, mode);
+ DBG_OPT_ALGSIM0(oldn, n, FS_OPT_EOR_TO_NOT);
+ }
} else {
n = transform_bitwise_distributive(n, transform_node_Eor);
}
*/
static ir_node *transform_node_Not(ir_node *n) {
ir_node *c, *oldn = n;
- ir_node *a = get_Not_op(n);
- ir_op *op_a = get_irn_op(a);
+ ir_node *a = get_Not_op(n);
+ ir_mode *mode = get_irn_mode(n);
HANDLE_UNOP_PHI(tarval_not,a,c);
/* check for a boolean Not */
- if ( (get_irn_mode(n) == mode_b)
- && (op_a == op_Proj)
- && (get_irn_mode(a) == mode_b)
- && (get_irn_op(get_Proj_pred(a)) == op_Cmp)) {
+ if (mode == mode_b &&
+ is_Proj(a) &&
+ is_Cmp(get_Proj_pred(a))) {
/* We negate a Cmp. The Cmp has the negated result anyways! */
n = new_r_Proj(current_ir_graph, get_irn_n(n, -1), get_Proj_pred(a),
mode_b, get_negated_pnc(get_Proj_proj(a), mode_b));
DBG_OPT_ALGSIM0(oldn, n, FS_OPT_NOT_CMP);
- return n;
+ return n;
}
- if (op_a == op_Sub) {
- ir_node *sub_r = get_Sub_right(a);
- if (is_Const(sub_r) && is_Const_one(sub_r)) {
- /* ~(x-1) = -x */
- ir_node *op = get_Sub_left(a);
- ir_node *blk = get_irn_n(n, -1);
- n = new_rd_Minus(get_irn_dbg_info(n), current_ir_graph, blk, op, get_irn_mode(n));
- DBG_OPT_ALGSIM0(oldn, n, FS_OPT_NOT_MINUS_1);
+ if (is_Eor(a)) {
+ ir_node *eor_b = get_Eor_right(a);
+ if (is_Const(eor_b)) { /* ~(x ^ const) -> x ^ ~const */
+ ir_node *cnst = new_Const(mode, tarval_not(get_Const_tarval(eor_b)));
+ ir_node *eor_a = get_Eor_left(a);
+ dbg_info *dbg = get_irn_dbg_info(n);
+ ir_graph *irg = current_ir_graph;
+ ir_node *block = get_nodes_block(n);
+ ir_mode *mode = get_irn_mode(n);
+ n = new_rd_Eor(dbg, irg, block, eor_a, cnst, mode);
+ return n;
+ }
+ }
+ if (get_mode_arithmetic(mode) == irma_twos_complement) {
+ if (is_Minus(a)) { /* ~-x -> x + -1 */
+ dbg_info *dbg = get_irn_dbg_info(n);
+ ir_graph *irg = current_ir_graph;
+ ir_node *block = get_nodes_block(n);
+ ir_node *add_l = get_Minus_op(a);
+ ir_node *add_r = new_rd_Const(dbg, irg, block, mode, get_mode_minus_one(mode));
+ n = new_rd_Add(dbg, irg, block, add_l, add_r, mode);
+ } else if (is_Add(a)) {
+ ir_node *add_r = get_Add_right(a);
+ if (is_Const(add_r) && is_Const_all_one(add_r)) {
+ /* ~(x + -1) = -x */
+ ir_node *op = get_Add_left(a);
+ ir_node *blk = get_irn_n(n, -1);
+ n = new_rd_Minus(get_irn_dbg_info(n), current_ir_graph, blk, op, get_irn_mode(n));
+ DBG_OPT_ALGSIM0(oldn, n, FS_OPT_NOT_MINUS_1);
+ }
}
}
return n;
* Optimize:
* -(~x) = x + 1
* -(a-b) = b - a
+ * -(a >>u (size-1)) = a >>s (size-1)
+ * -(a >>s (size-1)) = a >>u (size-1)
+ * -(a * const) -> a * -const
*/
static ir_node *transform_node_Minus(ir_node *n) {
ir_node *c, *oldn = n;
if (is_Const(c)) {
tarval *tv = get_Const_tarval(c);
- if (tarval_is_long(tv) && get_tarval_long(tv) == get_mode_size_bits(mode) - 1) {
+ if (tarval_is_long(tv) && get_tarval_long(tv) == (int) get_mode_size_bits(mode) - 1) {
/* -(a >>u (size-1)) = a >>s (size-1) */
ir_node *v = get_Shr_left(a);
if (is_Const(c)) {
tarval *tv = get_Const_tarval(c);
- if (tarval_is_long(tv) && get_tarval_long(tv) == get_mode_size_bits(mode) - 1) {
+ if (tarval_is_long(tv) && get_tarval_long(tv) == (int) get_mode_size_bits(mode) - 1) {
/* -(a >>s (size-1)) = a >>u (size-1) */
ir_node *v = get_Shrs_left(a);
return n;
}
+ if (is_Mul(a)) { /* -(a * const) -> a * -const */
+ ir_node *mul_l = get_Mul_left(a);
+ ir_node *mul_r = get_Mul_right(a);
+ if (is_Const(mul_r)) {
+ tarval *tv = tarval_neg(get_Const_tarval(mul_r));
+ if(tv != tarval_bad) {
+ ir_node *cnst = new_Const(mode, tv);
+ dbg_info *dbg = get_irn_dbg_info(a);
+ ir_graph *irg = current_ir_graph;
+ ir_node *block = get_nodes_block(a);
+ n = new_rd_Mul(dbg, irg, block, mul_l, cnst, mode);
+ DBG_OPT_ALGSIM2(oldn, a, n, FS_OPT_MINUS_MUL_C);
+ return n;
+ }
+ }
+ }
+
return n;
} /* transform_node_Minus */
ir_node *pred = get_Cast_op(n);
ir_type *tp = get_irn_type(n);
- if (get_irn_op(pred) == op_Const && get_Const_type(pred) != tp) {
+ if (is_Const(pred) && get_Const_type(pred) != tp) {
n = new_rd_Const_type(NULL, current_ir_graph, get_irn_n(pred, -1), get_irn_mode(pred),
get_Const_tarval(pred), tp);
DBG_OPT_CSTEVAL(oldn, n);
- } else if ((get_irn_op(pred) == op_SymConst) && (get_SymConst_value_type(pred) != tp)) {
- n = new_rd_SymConst_type(NULL, current_ir_graph, get_irn_n(pred, -1), get_SymConst_symbol(pred),
- get_SymConst_kind(pred), tp);
+ } else if (is_SymConst(pred) && get_SymConst_value_type(pred) != tp) {
+ n = new_rd_SymConst_type(NULL, current_ir_graph, get_irn_n(pred, -1), get_irn_mode(pred),
+ get_SymConst_symbol(pred), get_SymConst_kind(pred), tp);
DBG_OPT_CSTEVAL(oldn, n);
}
if (value_not_zero(b, &confirm)) {
/* div(x, y) && y != 0 */
+ if (confirm == NULL) {
+ /* we are sure we have a Const != 0 */
+ new_mem = get_Div_mem(div);
+ if (is_Pin(new_mem))
+ new_mem = get_Pin_op(new_mem);
+ set_Div_mem(div, new_mem);
+ set_irn_pinned(div, op_pin_state_floats);
+ }
+
proj_nr = get_Proj_proj(proj);
switch (proj_nr) {
case pn_Div_X_regular:
/* mod(x, y) && y != 0 */
proj_nr = get_Proj_proj(proj);
+ if (confirm == NULL) {
+ /* we are sure we have a Const != 0 */
+ new_mem = get_Mod_mem(mod);
+ if (is_Pin(new_mem))
+ new_mem = get_Pin_op(new_mem);
+ set_Mod_mem(mod, new_mem);
+ set_irn_pinned(mod, op_pin_state_floats);
+ }
+
switch (proj_nr) {
case pn_Mod_X_regular:
/* This node can only float up to the Confirm block */
new_mem = new_r_Pin(current_ir_graph, get_nodes_block(confirm), new_mem);
}
- set_irn_pinned(mod, op_pin_state_floats);
/* this is a Mod without exception, we can remove the memory edge */
- set_Mod_mem(mod, get_irg_no_mem(current_ir_graph));
+ set_Mod_mem(mod, new_mem);
return res;
case pn_Mod_res:
if (get_Mod_left(mod) == b) {
/* DivMod(x, y) && y != 0 */
proj_nr = get_Proj_proj(proj);
+ if (confirm == NULL) {
+ /* we are sure we have a Const != 0 */
+ new_mem = get_DivMod_mem(divmod);
+ if (is_Pin(new_mem))
+ new_mem = get_Pin_op(new_mem);
+ set_DivMod_mem(divmod, new_mem);
+ set_irn_pinned(divmod, op_pin_state_floats);
+ }
+
switch (proj_nr) {
case pn_DivMod_X_regular:
/* This node can only float up to the Confirm block */
new_mem = new_r_Pin(current_ir_graph, get_nodes_block(confirm), new_mem);
}
- set_irn_pinned(divmod, op_pin_state_floats);
/* this is a DivMod without exception, we can remove the memory edge */
- set_DivMod_mem(divmod, get_irg_no_mem(current_ir_graph));
+ set_DivMod_mem(divmod, new_mem);
return res;
case pn_DivMod_res_mod:
return proj;
} /* transform_node_Proj_Cond */
+/**
+ * Create a 0 constant of given mode.
+ */
+static ir_node *create_zero_const(ir_mode *mode) {
+ tarval *tv = get_mode_null(mode);
+ ir_node *cnst = new_Const(mode, tv);
+
+ return cnst;
+}
+
+/* the order of the values is important! */
+typedef enum const_class {
+ const_const = 0,
+ const_like = 1,
+ const_other = 2
+} const_class;
+
+static const_class classify_const(const ir_node* n)
+{
+ if (is_Const(n)) return const_const;
+ if (is_irn_constlike(n)) return const_like;
+ return const_other;
+}
+
+/**
+ * Determines whether r is more constlike or has a larger index (in that order)
+ * than l.
+ */
+static int operands_are_normalized(const ir_node *l, const ir_node *r)
+{
+ const const_class l_order = classify_const(l);
+ const const_class r_order = classify_const(r);
+ return
+ l_order > r_order ||
+ (l_order == r_order && get_irn_idx(l) <= get_irn_idx(r));
+}
+
/**
* Normalizes and optimizes Cmp nodes.
*/
static ir_node *transform_node_Proj_Cmp(ir_node *proj) {
- ir_node *n = get_Proj_pred(proj);
- ir_node *left = get_Cmp_left(n);
- ir_node *right = get_Cmp_right(n);
- ir_node *c = NULL;
- tarval *tv = NULL;
- int changed = 0;
- ir_mode *mode = NULL;
- long proj_nr = get_Proj_proj(proj);
-
- /* we can evaluate this direct */
- switch(proj_nr) {
+ ir_node *n = get_Proj_pred(proj);
+ ir_node *left = get_Cmp_left(n);
+ ir_node *right = get_Cmp_right(n);
+ tarval *tv = NULL;
+ int changed = 0;
+ ir_mode *mode = NULL;
+ long proj_nr = get_Proj_proj(proj);
+
+ /* we can evaluate some cases directly */
+ switch (proj_nr) {
case pn_Cmp_False:
return new_Const(mode_b, get_tarval_b_false());
case pn_Cmp_True:
return new_Const(mode_b, get_tarval_b_true());
case pn_Cmp_Leg:
- if(!mode_is_float(get_irn_mode(left)))
+ if (!mode_is_float(get_irn_mode(left)))
return new_Const(mode_b, get_tarval_b_true());
break;
default:
break;
}
+ /* remove Casts of both sides */
+ left = skip_Cast(left);
+ right = skip_Cast(right);
+
/* Remove unnecessary conversions */
/* TODO handle constants */
if (is_Conv(left) && is_Conv(right)) {
ir_mode *mode_left = get_irn_mode(op_left);
ir_mode *mode_right = get_irn_mode(op_right);
- if (smaller_mode(mode_left, mode) && smaller_mode(mode_right, mode)) {
+ if (smaller_mode(mode_left, mode) && smaller_mode(mode_right, mode)
+ && mode_left != mode_b && mode_right != mode_b) {
ir_graph *irg = current_ir_graph;
ir_node *block = get_nodes_block(n);
left = op_left;
right = op_right;
changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_CONV_CONV);
} else if (smaller_mode(mode_left, mode_right)) {
left = new_r_Conv(irg, block, op_left, mode_right);
right = op_right;
changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_CONV);
} else if (smaller_mode(mode_right, mode_left)) {
left = op_left;
right = new_r_Conv(irg, block, op_right, mode_left);
changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_CONV);
}
}
}
- /* TODO extend to arbitrary constants */
- if (is_Conv(left) && is_Const(right) && is_Const_null(right)) {
- ir_mode* mode = get_irn_mode(left);
- ir_node* op = get_Conv_op(left);
- ir_mode* op_mode = get_irn_mode(op);
-
- if (get_mode_size_bits(mode) > get_mode_size_bits(op_mode) &&
- (mode_is_signed(mode) || !mode_is_signed(op_mode))) {
- ir_node *null = new_Const(op_mode, get_mode_null(op_mode));
- set_Cmp_left( n, op);
- set_Cmp_right(n, null);
- return proj;
- }
- }
-
- /* remove Casts */
- if (is_Cast(left))
- left = get_Cast_op(left);
- if (is_Cast(right))
- right = get_Cast_op(right);
-
- /* remove operation of both sides if possible */
+ /* remove operation on both sides if possible */
if (proj_nr == pn_Cmp_Eq || proj_nr == pn_Cmp_Lg) {
- ir_opcode lop = get_irn_opcode(left);
-
- if (lop == get_irn_opcode(right)) {
- ir_node *ll, *lr, *rl, *rr;
-
- /* same operation on both sides, try to remove */
- switch (lop) {
- case iro_Not:
- case iro_Minus:
- /* ~a CMP ~b => a CMP b, -a CMP -b ==> a CMP b */
- left = get_unop_op(left);
- right = get_unop_op(right);
- changed |= 1;
- break;
- case iro_Add:
- ll = get_Add_left(left);
- lr = get_Add_right(left);
- rl = get_Add_left(right);
- rr = get_Add_right(right);
-
- if (ll == rl) {
- /* X + a CMP X + b ==> a CMP b */
- left = lr;
- right = rr;
- changed |= 1;
- } else if (ll == rr) {
- /* X + a CMP b + X ==> a CMP b */
- left = lr;
- right = rl;
- changed |= 1;
- } else if (lr == rl) {
- /* a + X CMP X + b ==> a CMP b */
- left = ll;
- right = rr;
- changed |= 1;
- } else if (lr == rr) {
- /* a + X CMP b + X ==> a CMP b */
- left = ll;
- right = rl;
+ /*
+ * The following operations are NOT safe for floating point operations, for instance
+ * 1.0 + inf == 2.0 + inf, =/=> x == y
+ */
+ if (mode_is_int(get_irn_mode(left))) {
+ unsigned lop = get_irn_opcode(left);
+
+ if (lop == get_irn_opcode(right)) {
+ ir_node *ll, *lr, *rl, *rr;
+
+ /* same operation on both sides, try to remove */
+ switch (lop) {
+ case iro_Not:
+ case iro_Minus:
+ /* ~a CMP ~b => a CMP b, -a CMP -b ==> a CMP b */
+ left = get_unop_op(left);
+ right = get_unop_op(right);
changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_OP);
+ break;
+ case iro_Add:
+ ll = get_Add_left(left);
+ lr = get_Add_right(left);
+ rl = get_Add_left(right);
+ rr = get_Add_right(right);
+
+ if (ll == rl) {
+ /* X + a CMP X + b ==> a CMP b */
+ left = lr;
+ right = rr;
+ changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_OP);
+ } else if (ll == rr) {
+ /* X + a CMP b + X ==> a CMP b */
+ left = lr;
+ right = rl;
+ changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_OP);
+ } else if (lr == rl) {
+ /* a + X CMP X + b ==> a CMP b */
+ left = ll;
+ right = rr;
+ changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_OP);
+ } else if (lr == rr) {
+ /* a + X CMP b + X ==> a CMP b */
+ left = ll;
+ right = rl;
+ changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_OP);
+ }
+ break;
+ case iro_Sub:
+ ll = get_Sub_left(left);
+ lr = get_Sub_right(left);
+ rl = get_Sub_left(right);
+ rr = get_Sub_right(right);
+
+ if (ll == rl) {
+ /* X - a CMP X - b ==> a CMP b */
+ left = lr;
+ right = rr;
+ changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_OP);
+ } else if (lr == rr) {
+ /* a - X CMP b - X ==> a CMP b */
+ left = ll;
+ right = rl;
+ changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_OP);
+ }
+ break;
+ case iro_Rot:
+ if (get_Rot_right(left) == get_Rot_right(right)) {
+ /* a ROT X CMP b ROT X ==> a CMP b */
+ left = get_Rot_left(left);
+ right = get_Rot_left(right);
+ changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_OP);
+ }
+ break;
+ default:
+ break;
}
- break;
- case iro_Sub:
- ll = get_Sub_left(left);
- lr = get_Sub_right(left);
- rl = get_Sub_left(right);
- rr = get_Sub_right(right);
-
- if (ll == rl) {
- /* X - a CMP X - b ==> a CMP b */
- left = lr;
- right = rr;
- changed |= 1;
- } else if (lr == rr) {
- /* a - X CMP b - X ==> a CMP b */
- left = ll;
- right = rl;
+ }
+
+ /* X+A == A, A+X == A, A-X == A -> X == 0 */
+ if (is_Add(left) || is_Sub(left)) {
+ ir_node *ll = get_binop_left(left);
+ ir_node *lr = get_binop_right(left);
+
+ if (lr == right && is_Add(left)) {
+ ir_node *tmp = ll;
+ ll = lr;
+ lr = tmp;
+ }
+ if (ll == right) {
+ left = lr;
+ right = create_zero_const(get_irn_mode(left));
changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_OP);
}
- break;
- case iro_Rot:
- if (get_Rot_right(left) == get_Rot_right(right)) {
- /* a ROT X CMP b ROT X */
- left = get_Rot_left(left);
- right = get_Rot_left(right);
+ }
+ if (is_Add(right) || is_Sub(right)) {
+ ir_node *rl = get_binop_left(right);
+ ir_node *rr = get_binop_right(right);
+
+ if (rr == left && is_Add(right)) {
+ ir_node *tmp = rl;
+ rl = rr;
+ rr = tmp;
+ }
+ if (rl == left) {
+ left = rr;
+ right = create_zero_const(get_irn_mode(left));
changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_OP);
}
- break;
- default:
- break;
}
- }
- }
+ } /* mode_is_int(...) */
+ } /* proj_nr == pn_Cmp_Eq || proj_nr == pn_Cmp_Lg */
+ /* replace mode_b compares with ands/ors */
if (get_irn_mode(left) == mode_b) {
ir_graph *irg = current_ir_graph;
ir_node *block = get_nodes_block(n);
+ ir_node *bres;
switch (proj_nr) {
- case pn_Cmp_Le: return new_r_Or( irg, block, new_r_Not(irg, block, left, mode_b), right, mode_b);
- case pn_Cmp_Lt: return new_r_And(irg, block, new_r_Not(irg, block, left, mode_b), right, mode_b);
- case pn_Cmp_Ge: return new_r_Or( irg, block, left, new_r_Not(irg, block, right, mode_b), mode_b);
- case pn_Cmp_Gt: return new_r_And(irg, block, left, new_r_Not(irg, block, right, mode_b), mode_b);
- case pn_Cmp_Lg: return new_r_Eor(irg, block, left, right, mode_b);
- case pn_Cmp_Eq: return new_r_Not(irg, block, new_r_Eor(irg, block, left, right, mode_b), mode_b);
+ case pn_Cmp_Le: bres = new_r_Or( irg, block, new_r_Not(irg, block, left, mode_b), right, mode_b); break;
+ case pn_Cmp_Lt: bres = new_r_And(irg, block, new_r_Not(irg, block, left, mode_b), right, mode_b); break;
+ case pn_Cmp_Ge: bres = new_r_Or( irg, block, left, new_r_Not(irg, block, right, mode_b), mode_b); break;
+ case pn_Cmp_Gt: bres = new_r_And(irg, block, left, new_r_Not(irg, block, right, mode_b), mode_b); break;
+ case pn_Cmp_Lg: bres = new_r_Eor(irg, block, left, right, mode_b); break;
+ case pn_Cmp_Eq: bres = new_r_Not(irg, block, new_r_Eor(irg, block, left, right, mode_b), mode_b); break;
+ default: bres = NULL;
+ }
+ if (bres) {
+ DBG_OPT_ALGSIM0(n, bres, FS_OPT_CMP_TO_BOOL);
+ return bres;
}
}
- if (!get_opt_reassociation())
- return proj;
-
/*
* First step: normalize the compare op
* by placing the constant on the right side
* or moving the lower address node to the left.
- * We ignore the case that both are constants
- * this case should be optimized away.
*/
- if (is_Const(right)) {
- c = right;
- } else if (is_Const(left)) {
- c = left;
- left = right;
- right = c;
-
- proj_nr = get_inversed_pnc(proj_nr);
- changed |= 1;
- } else if (get_irn_idx(left) > get_irn_idx(right)) {
+ if (!operands_are_normalized(left, right)) {
ir_node *t = left;
left = right;
* later and may help to normalize more compares.
* Of course this is only possible for integer values.
*/
- if (c) {
- mode = get_irn_mode(c);
- tv = get_Const_tarval(c);
+ if (is_Const(right)) {
+ mode = get_irn_mode(right);
+ tv = get_Const_tarval(right);
+
+ /* TODO extend to arbitrary constants */
+ if (is_Conv(left) && tarval_is_null(tv)) {
+ ir_node *op = get_Conv_op(left);
+ ir_mode *op_mode = get_irn_mode(op);
+
+ /*
+ * UpConv(x) REL 0 ==> x REL 0
+ */
+ if (get_mode_size_bits(mode) > get_mode_size_bits(op_mode) &&
+ ((proj_nr == pn_Cmp_Eq || proj_nr == pn_Cmp_Lg) ||
+ mode_is_signed(mode) || !mode_is_signed(op_mode))) {
+ tv = get_mode_null(op_mode);
+ left = op;
+ mode = op_mode;
+ changed |= 2;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_CONV);
+ }
+ }
if (tv != tarval_bad) {
/* the following optimization is possible on modes without Overflow
left = get_Minus_op(left);
proj_nr = get_inversed_pnc(proj_nr);
changed |= 2;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_C);
}
} else if (is_Not(left) && (proj_nr == pn_Cmp_Eq || proj_nr == pn_Cmp_Lg)) {
+ /* Not(a) ==/!= c ==> a ==/!= Not(c) */
tv = tarval_not(tv);
if (tv != tarval_bad) {
left = get_Not_op(left);
changed |= 2;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_C);
}
}
if (tv != tarval_bad) {
proj_nr ^= pn_Cmp_Eq;
changed |= 2;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_CNST_MAGN);
}
}
/* c < 0 : a > c ==> a >= (c+1) a <= c ==> a < (c+1) */
if (tv != tarval_bad) {
proj_nr ^= pn_Cmp_Eq;
changed |= 2;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_CNST_MAGN);
}
}
/* the following reassociations work only for == and != */
if (proj_nr == pn_Cmp_Eq || proj_nr == pn_Cmp_Lg) {
+#if 0 /* Might be not that good in general */
/* a-b == 0 ==> a == b, a-b != 0 ==> a != b */
if (tarval_is_null(tv) && is_Sub(left)) {
- right =get_Sub_right(left);
+ right = get_Sub_right(left);
left = get_Sub_left(left);
tv = value_of(right);
changed = 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_C);
}
+#endif
if (tv != tarval_bad) {
- ir_op *op = get_irn_op(left);
-
/* a-c1 == c2 ==> a == c2+c1, a-c1 != c2 ==> a != c2+c1 */
- if (op == op_Sub) {
+ if (is_Sub(left)) {
ir_node *c1 = get_Sub_right(left);
tarval *tv2 = value_of(c1);
left = get_Sub_left(left);
tv = tv2;
changed |= 2;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_C);
}
}
}
/* a+c1 == c2 ==> a == c2-c1, a+c1 != c2 ==> a != c2-c1 */
- else if (op == op_Add) {
+ else if (is_Add(left)) {
ir_node *a_l = get_Add_left(left);
ir_node *a_r = get_Add_right(left);
ir_node *a;
tarval *tv2;
- if (get_irn_op(a_l) == op_Const) {
+ if (is_Const(a_l)) {
a = a_r;
tv2 = value_of(a_l);
} else {
left = a;
tv = tv2;
changed |= 2;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_C);
}
}
}
/* -a == c ==> a == -c, -a != c ==> a != -c */
- else if (op == op_Minus) {
+ else if (is_Minus(left)) {
tarval *tv2 = tarval_sub(get_mode_null(mode), tv);
if (tv2 != tarval_bad) {
left = get_Minus_op(left);
tv = tv2;
changed |= 2;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_C);
}
}
}
/* the following reassociations work only for <= */
else if (proj_nr == pn_Cmp_Le || proj_nr == pn_Cmp_Lt) {
if (tv != tarval_bad) {
- ir_op *op = get_irn_op(left);
-
/* c >= 0 : Abs(a) <= c ==> (unsigned)(a + c) <= 2*c */
- if (op == op_Abs) {
+ if (get_irn_op(left) == op_Abs) { // TODO something is missing here
}
}
}
} /* mode_is_int */
- /*
- * optimization for AND:
- * Optimize:
- * And(x, C) == C ==> And(x, C) != 0
- * And(x, C) != C ==> And(X, C) == 0
- *
- * if C is a single Bit constant.
- */
- if ((proj_nr == pn_Cmp_Eq || proj_nr == pn_Cmp_Lg) && is_And(left)) {
- if (tarval_is_single_bit(tv)) {
- /* check for Constant's match. We have check hare the tarvals,
- because our const might be changed */
- ir_node *la = get_And_left(left);
- ir_node *ra = get_And_right(left);
- if ((is_Const(la) && get_Const_tarval(la) == tv) ||
- (is_Const(ra) && get_Const_tarval(ra) == tv)) {
- /* fine: do the transformation */
- tv = get_mode_null(get_tarval_mode(tv));
- proj_nr ^= pn_Cmp_Leg;
- changed |= 2;
+ if (proj_nr == pn_Cmp_Eq || proj_nr == pn_Cmp_Lg) {
+ switch (get_irn_opcode(left)) {
+ ir_node *c1;
+
+ case iro_And:
+ c1 = get_And_right(left);
+ if (is_Const(c1)) {
+ /*
+ * And(x, C1) == C2 ==> FALSE if C2 & C1 != C2
+ * And(x, C1) != C2 ==> TRUE if C2 & C1 != C2
+ */
+ tarval *mask = tarval_and(get_Const_tarval(c1), tv);
+ if (mask != tv) {
+ /* TODO: move to constant evaluation */
+ tv = proj_nr == pn_Cmp_Eq ? get_tarval_b_false() : get_tarval_b_true();
+ c1 = new_Const(mode_b, tv);
+ DBG_OPT_CSTEVAL(proj, c1);
+ return c1;
+ }
+
+ if (tarval_is_single_bit(tv)) {
+ /*
+ * optimization for AND:
+ * Optimize:
+ * And(x, C) == C ==> And(x, C) != 0
+ * And(x, C) != C ==> And(X, C) == 0
+ *
+ * if C is a single Bit constant.
+ */
+
+ /* check for Constant's match. We have check hare the tarvals,
+ because our const might be changed */
+ if (get_Const_tarval(c1) == tv) {
+ /* fine: do the transformation */
+ tv = get_mode_null(get_tarval_mode(tv));
+ proj_nr ^= pn_Cmp_Leg;
+ changed |= 2;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_CNST_MAGN);
+ }
+ }
}
- }
+ break;
+ case iro_Or:
+ c1 = get_Or_right(left);
+ if (is_Const(c1) && tarval_is_null(tv)) {
+ /*
+ * Or(x, C) == 0 && C != 0 ==> FALSE
+ * Or(x, C) != 0 && C != 0 ==> TRUE
+ */
+ if (! tarval_is_null(get_Const_tarval(c1))) {
+ /* TODO: move to constant evaluation */
+ tv = proj_nr == pn_Cmp_Eq ? get_tarval_b_false() : get_tarval_b_true();
+ c1 = new_Const(mode_b, tv);
+ DBG_OPT_CSTEVAL(proj, c1);
+ return c1;
+ }
+ }
+ break;
+ case iro_Shl:
+ /*
+ * optimize x << c1 == c into x & (-1 >>u c1) == c >> c1 if c & (-1 << c1) == c
+ * FALSE else
+ * optimize x << c1 != c into x & (-1 >>u c1) != c >> c1 if c & (-1 << c1) == c
+ * TRUE else
+ */
+ c1 = get_Shl_right(left);
+ if (is_Const(c1)) {
+ tarval *tv1 = get_Const_tarval(c1);
+ ir_mode *mode = get_irn_mode(left);
+ tarval *minus1 = get_mode_all_one(mode);
+ tarval *amask = tarval_shr(minus1, tv1);
+ tarval *cmask = tarval_shl(minus1, tv1);
+ ir_node *sl, *blk;
+
+ if (tarval_and(tv, cmask) != tv) {
+ /* condition not met */
+ tv = proj_nr == pn_Cmp_Eq ? get_tarval_b_false() : get_tarval_b_true();
+ c1 = new_Const(mode_b, tv);
+ DBG_OPT_CSTEVAL(proj, c1);
+ return c1;
+ }
+ sl = get_Shl_left(left);
+ blk = get_nodes_block(n);
+ left = new_rd_And(get_irn_dbg_info(left), current_ir_graph, blk, sl, new_Const(mode, amask), mode);
+ tv = tarval_shr(tv, tv1);
+ changed |= 2;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_SHF_TO_AND);
+ }
+ break;
+ case iro_Shr:
+ /*
+ * optimize x >>u c1 == c into x & (-1 << c1) == c << c1 if c & (-1 >>u c1) == c
+ * FALSE else
+ * optimize x >>u c1 != c into x & (-1 << c1) != c << c1 if c & (-1 >>u c1) == c
+ * TRUE else
+ */
+ c1 = get_Shr_right(left);
+ if (is_Const(c1)) {
+ tarval *tv1 = get_Const_tarval(c1);
+ ir_mode *mode = get_irn_mode(left);
+ tarval *minus1 = get_mode_all_one(mode);
+ tarval *amask = tarval_shl(minus1, tv1);
+ tarval *cmask = tarval_shr(minus1, tv1);
+ ir_node *sl, *blk;
+
+ if (tarval_and(tv, cmask) != tv) {
+ /* condition not met */
+ tv = proj_nr == pn_Cmp_Eq ? get_tarval_b_false() : get_tarval_b_true();
+ c1 = new_Const(mode_b, tv);
+ DBG_OPT_CSTEVAL(proj, c1);
+ return c1;
+ }
+ sl = get_Shr_left(left);
+ blk = get_nodes_block(n);
+ left = new_rd_And(get_irn_dbg_info(left), current_ir_graph, blk, sl, new_Const(mode, amask), mode);
+ tv = tarval_shl(tv, tv1);
+ changed |= 2;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_SHF_TO_AND);
+ }
+ break;
+ case iro_Shrs:
+ /*
+ * optimize x >>s c1 == c into x & (-1 << c1) == c << c1 if (c >>s (BITS - c1)) \in {0,-1}
+ * FALSE else
+ * optimize x >>s c1 != c into x & (-1 << c1) != c << c1 if (c >>s (BITS - c1)) \in {0,-1}
+ * TRUE else
+ */
+ c1 = get_Shrs_right(left);
+ if (is_Const(c1)) {
+ tarval *tv1 = get_Const_tarval(c1);
+ ir_mode *mode = get_irn_mode(left);
+ tarval *minus1 = get_mode_all_one(mode);
+ tarval *amask = tarval_shl(minus1, tv1);
+ tarval *cond = new_tarval_from_long(get_mode_size_bits(mode), get_tarval_mode(tv1));
+ ir_node *sl, *blk;
+
+ cond = tarval_sub(cond, tv1);
+ cond = tarval_shrs(tv, cond);
+
+ if (!tarval_is_all_one(cond) && !tarval_is_null(cond)) {
+ /* condition not met */
+ tv = proj_nr == pn_Cmp_Eq ? get_tarval_b_false() : get_tarval_b_true();
+ c1 = new_Const(mode_b, tv);
+ DBG_OPT_CSTEVAL(proj, c1);
+ return c1;
+ }
+ sl = get_Shrs_left(left);
+ blk = get_nodes_block(n);
+ left = new_rd_And(get_irn_dbg_info(left), current_ir_graph, blk, sl, new_Const(mode, amask), mode);
+ tv = tarval_shl(tv, tv1);
+ changed |= 2;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_SHF_TO_AND);
+ }
+ break;
+ } /* switch */
}
} /* tarval != bad */
}
+ if (changed & 2) /* need a new Const */
+ right = new_Const(mode, tv);
+
+ if ((proj_nr == pn_Cmp_Eq || proj_nr == pn_Cmp_Lg) && is_Const(right) && is_Const_null(right) && is_Proj(left)) {
+ ir_node *op = get_Proj_pred(left);
+
+ if ((is_Mod(op) && get_Proj_proj(left) == pn_Mod_res) ||
+ (is_DivMod(op) && get_Proj_proj(left) == pn_DivMod_res_mod)) {
+ ir_node *c = get_binop_right(op);
+
+ if (is_Const(c)) {
+ tarval *tv = get_Const_tarval(c);
+
+ if (tarval_is_single_bit(tv)) {
+ /* special case: (x % 2^n) CMP 0 ==> x & (2^n-1) CMP 0 */
+ ir_node *v = get_binop_left(op);
+ ir_node *blk = get_irn_n(op, -1);
+ ir_mode *mode = get_irn_mode(v);
+
+ tv = tarval_sub(tv, get_mode_one(mode));
+ left = new_rd_And(get_irn_dbg_info(op), current_ir_graph, blk, v, new_Const(mode, tv), mode);
+ changed |= 1;
+ DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_MOD_TO_AND);
+ }
+ }
+ }
+ }
+
if (changed) {
ir_node *block = get_irn_n(n, -1); /* Beware of get_nodes_Block() */
- if (changed & 2) /* need a new Const */
- right = new_Const(mode, tv);
-
/* create a new compare */
n = new_rd_Cmp(get_irn_dbg_info(n), current_ir_graph, block, left, right);
-
- set_Proj_pred(proj, n);
- set_Proj_proj(proj, proj_nr);
+ proj = new_rd_Proj(get_irn_dbg_info(proj), current_ir_graph, block, n, get_irn_mode(proj), proj_nr);
}
return proj;
assert(is_op_commutative(get_irn_op(binop)));
- if (get_irn_op(op_a) == op_Const) {
+ if (is_Const(op_a)) {
*a = op_b;
*c = op_a;
} else {
shl = get_binop_left(or);
shr = get_binop_right(or);
- if (get_irn_op(shl) == op_Shr) {
- if (get_irn_op(shr) != op_Shl)
+ if (is_Shr(shl)) {
+ if (!is_Shl(shr))
return or;
irn = shl;
shl = shr;
shr = irn;
- } else if (get_irn_op(shl) != op_Shl) {
+ } else if (!is_Shl(shl)) {
return or;
- } else if (get_irn_op(shr) != op_Shr) {
+ } else if (!is_Shr(shr)) {
return or;
}
x = get_Shl_left(shl);
c1 = get_Shl_right(shl);
c2 = get_Shr_right(shr);
- if (get_irn_op(c1) == op_Const && get_irn_op(c2) == op_Const) {
+ if (is_Const(c1) && is_Const(c2)) {
tv1 = get_Const_tarval(c1);
if (! tarval_is_long(tv1))
return or;
return or;
if (get_tarval_long(tv1) + get_tarval_long(tv2)
- != get_mode_size_bits(mode))
+ != (int) get_mode_size_bits(mode))
return or;
/* yet, condition met */
DBG_OPT_ALGSIM1(or, shl, shr, n, FS_OPT_OR_SHFT_TO_ROT);
return n;
- } else if (get_irn_op(c1) == op_Sub) {
+ } else if (is_Sub(c1)) {
v = c2;
sub = c1;
return or;
c1 = get_Sub_left(sub);
- if (get_irn_op(c1) != op_Const)
+ if (!is_Const(c1))
return or;
tv1 = get_Const_tarval(c1);
if (! tarval_is_long(tv1))
return or;
- if (get_tarval_long(tv1) != get_mode_size_bits(mode))
+ if (get_tarval_long(tv1) != (int) get_mode_size_bits(mode))
return or;
/* yet, condition met */
DBG_OPT_ALGSIM0(or, n, FS_OPT_OR_SHFT_TO_ROT);
return n;
- } else if (get_irn_op(c2) == op_Sub) {
+ } else if (is_Sub(c2)) {
v = c1;
sub = c2;
c1 = get_Sub_left(sub);
- if (get_irn_op(c1) != op_Const)
+ if (!is_Const(c1))
return or;
tv1 = get_Const_tarval(c1);
if (! tarval_is_long(tv1))
return or;
- if (get_tarval_long(tv1) != get_mode_size_bits(mode))
+ if (get_tarval_long(tv1) != (int) get_mode_size_bits(mode))
return or;
/* yet, condition met */
ir_node *c, *oldn = n;
ir_node *a = get_Or_left(n);
ir_node *b = get_Or_right(n);
+ ir_mode *mode;
if (is_Not(a) && is_Not(b)) {
/* ~a | ~b = ~(a&b) */
ir_node *block = get_nodes_block(n);
- ir_mode *mode = get_irn_mode(n);
+ mode = get_irn_mode(n);
a = get_Not_op(a);
b = get_Not_op(b);
n = new_rd_And(get_irn_dbg_info(n), current_ir_graph, block, a, b, mode);
}
}
- HANDLE_BINOP_PHI(tarval_or, a,b,c);
+ mode = get_irn_mode(n);
+ HANDLE_BINOP_PHI(tarval_or, a, b, c, mode);
n = transform_node_Or_bf_store(n);
n = transform_node_Or_Rot(n);
static ir_node *transform_node(ir_node *n);
/**
- * Optimize (a >> c1) >> c2), works for Shr, Shrs, Shl.
+ * Optimize (a >> c1) >> c2), works for Shr, Shrs, Shl, Rot.
*
* Should be moved to reassociation?
*/
*/
static ir_node *transform_node_Shr(ir_node *n) {
ir_node *c, *oldn = n;
- ir_node *a = get_Shr_left(n);
- ir_node *b = get_Shr_right(n);
+ ir_node *a = get_Shr_left(n);
+ ir_node *b = get_Shr_right(n);
+ ir_mode *mode = get_irn_mode(n);
- HANDLE_BINOP_PHI(tarval_shr, a, b, c);
+ HANDLE_BINOP_PHI(tarval_shr, a, b, c, mode);
return transform_node_shift(n);
} /* transform_node_Shr */
*/
static ir_node *transform_node_Shrs(ir_node *n) {
ir_node *c, *oldn = n;
- ir_node *a = get_Shrs_left(n);
- ir_node *b = get_Shrs_right(n);
+ ir_node *a = get_Shrs_left(n);
+ ir_node *b = get_Shrs_right(n);
+ ir_mode *mode = get_irn_mode(n);
- HANDLE_BINOP_PHI(tarval_shrs, a, b, c);
+ HANDLE_BINOP_PHI(tarval_shrs, a, b, c, mode);
return transform_node_shift(n);
} /* transform_node_Shrs */
*/
static ir_node *transform_node_Shl(ir_node *n) {
ir_node *c, *oldn = n;
- ir_node *a = get_Shl_left(n);
- ir_node *b = get_Shl_right(n);
+ ir_node *a = get_Shl_left(n);
+ ir_node *b = get_Shl_right(n);
+ ir_mode *mode = get_irn_mode(n);
- HANDLE_BINOP_PHI(tarval_shl, a, b, c);
+ HANDLE_BINOP_PHI(tarval_shl, a, b, c, mode);
return transform_node_shift(n);
} /* transform_node_Shl */
+/**
+ * Transform a Rot.
+ */
+static ir_node *transform_node_Rot(ir_node *n) {
+ ir_node *c, *oldn = n;
+ ir_node *a = get_Rot_left(n);
+ ir_node *b = get_Rot_right(n);
+ ir_mode *mode = get_irn_mode(n);
+
+ HANDLE_BINOP_PHI(tarval_rot, a, b, c, mode);
+ return transform_node_shift(n);
+} /* transform_node_Rot */
+
+/**
+ * Transform a Conv.
+ */
+static ir_node *transform_node_Conv(ir_node *n) {
+ ir_node *c, *oldn = n;
+ ir_node *a = get_Conv_op(n);
+
+ if (is_const_Phi(a)) {
+ c = apply_conv_on_phi(a, get_irn_mode(n));
+ if (c) {
+ DBG_OPT_ALGSIM0(oldn, c, FS_OPT_CONST_PHI);
+ return c;
+ }
+ }
+
+ if (is_Unknown(a)) { /* Conv_A(Unknown_B) -> Unknown_A */
+ ir_mode *mode = get_irn_mode(n);
+ return new_r_Unknown(current_ir_graph, mode);
+ }
+
+ return n;
+} /* transform_node_Conv */
+
/**
* Remove dead blocks and nodes in dead blocks
* in keep alive list. We do not generate a new End node.
/** returns 1 if a == -b */
static int is_negated_value(ir_node *a, ir_node *b) {
- if(is_Minus(a) && get_Minus_op(a) == b)
+ if (is_Minus(a) && get_Minus_op(a) == b)
return 1;
- if(is_Minus(b) && get_Minus_op(b) == a)
+ if (is_Minus(b) && get_Minus_op(b) == a)
return 1;
- if(is_Sub(a) && is_Sub(b)) {
+ if (is_Sub(a) && is_Sub(b)) {
ir_node *a_left = get_Sub_left(a);
ir_node *a_right = get_Sub_right(a);
ir_node *b_left = get_Sub_left(b);
ir_node *b_right = get_Sub_right(b);
- if(a_left == b_right && a_right == b_left)
+ if (a_left == b_right && a_right == b_left)
return 1;
}
tarval *tv_t = get_Const_tarval(t);
if (tv_t == tarval_b_true) {
if (is_Const(f)) {
+ /* Muxb(sel, true, false) = sel */
assert(get_Const_tarval(f) == tarval_b_false);
+ DBG_OPT_ALGSIM0(oldn, sel, FS_OPT_MUX_BOOL);
return sel;
} else {
- return new_rd_Or(dbg, irg, block, sel, f, mode_b);
+ /* Muxb(sel, true, x) = Or(sel, x) */
+ n = new_rd_Or(dbg, irg, block, sel, f, mode_b);
+ DBG_OPT_ALGSIM0(oldn, n, FS_OPT_MUX_OR_BOOL);
+ return n;
}
} else {
ir_node* not_sel = new_rd_Not(dbg, irg, block, sel, mode_b);
assert(tv_t == tarval_b_false);
if (is_Const(f)) {
+ /* Muxb(sel, false, true) = Not(sel) */
assert(get_Const_tarval(f) == tarval_b_true);
+ DBG_OPT_ALGSIM0(oldn, not_sel, FS_OPT_MUX_NOT_BOOL);
return not_sel;
} else {
- return new_rd_And(dbg, irg, block, not_sel, f, mode_b);
+ /* Muxb(sel, false, x) = And(Not(sel), x) */
+ n = new_rd_And(dbg, irg, block, not_sel, f, mode_b);
+ DBG_OPT_ALGSIM0(oldn, n, FS_OPT_MUX_ANDNOT_BOOL);
+ return n;
}
}
} else if (is_Const(f)) {
tarval *tv_f = get_Const_tarval(f);
if (tv_f == tarval_b_true) {
+ /* Muxb(sel, x, true) = Or(Not(sel), x) */
ir_node* not_sel = new_rd_Not(dbg, irg, block, sel, mode_b);
- return new_rd_Or(dbg, irg, block, not_sel, t, mode_b);
+ DBG_OPT_ALGSIM0(oldn, n, FS_OPT_MUX_ORNOT_BOOL);
+ n = new_rd_Or(dbg, irg, block, not_sel, t, mode_b);
+ return n;
} else {
+ /* Muxb(sel, x, false) = And(sel, x) */
assert(tv_f == tarval_b_false);
- return new_rd_And(dbg, irg, block, sel, t, mode_b);
+ n = new_rd_And(dbg, irg, block, sel, t, mode_b);
+ DBG_OPT_ALGSIM0(oldn, n, FS_OPT_MUX_AND_BOOL);
+ return n;
}
}
}
- if (get_irn_op(sel) == op_Proj && !mode_honor_signed_zeros(mode)) {
+ if (is_Proj(sel)) {
ir_node *cmp = get_Proj_pred(sel);
long pn = get_Proj_proj(sel);
ir_node *f = get_Mux_false(n);
*
* Note further that these optimization work even for floating point
* with NaN's because -NaN == NaN.
- * However, if +0 and -0 is handled differently, we cannot use the first
- * one.
+ * However, if +0 and -0 is handled differently, we cannot use the Abs/-Abs
+ * transformations.
*/
if (is_Cmp(cmp)) {
ir_node *cmp_r = get_Cmp_right(cmp);
if (is_Const(cmp_r) && is_Const_null(cmp_r)) {
- ir_node *block = get_irn_n(n, -1);
+ ir_node *block = get_nodes_block(n);
+ ir_node *cmp_l = get_Cmp_left(cmp);
- if(is_negated_value(f, t)) {
- ir_node *cmp_left = get_Cmp_left(cmp);
+ if (mode_honor_signed_zeros(mode) && is_negated_value(f, t)) {
+ /* f = -t */
- /* Psi(a >= 0, a, -a) = Psi(a <= 0, -a, a) ==> Abs(a) */
- if ( (cmp_left == t && (pn == pn_Cmp_Ge || pn == pn_Cmp_Gt))
- || (cmp_left == f && (pn == pn_Cmp_Le || pn == pn_Cmp_Lt)))
+ if ( (cmp_l == t && (pn == pn_Cmp_Ge || pn == pn_Cmp_Gt))
+ || (cmp_l == f && (pn == pn_Cmp_Le || pn == pn_Cmp_Lt)))
{
+ /* Psi(a >/>= 0, a, -a) = Psi(a </<= 0, -a, a) ==> Abs(a) */
n = new_rd_Abs(get_irn_dbg_info(n), current_ir_graph, block,
- cmp_left, mode);
+ cmp_l, mode);
DBG_OPT_ALGSIM1(oldn, cmp, sel, n, FS_OPT_MUX_TO_ABS);
return n;
- /* Psi(a <= 0, a, -a) = Psi(a >= 0, -a, a) ==> -Abs(a) */
- } else if ((cmp_left == t && (pn == pn_Cmp_Le || pn == pn_Cmp_Lt))
- || (cmp_left == f && (pn == pn_Cmp_Ge || pn == pn_Cmp_Gt)))
+ } else if ((cmp_l == t && (pn == pn_Cmp_Le || pn == pn_Cmp_Lt))
+ || (cmp_l == f && (pn == pn_Cmp_Ge || pn == pn_Cmp_Gt)))
{
+ /* Psi(a </<= 0, a, -a) = Psi(a >/>= 0, -a, a) ==> -Abs(a) */
n = new_rd_Abs(get_irn_dbg_info(n), current_ir_graph, block,
- cmp_left, mode);
+ cmp_l, mode);
n = new_rd_Minus(get_irn_dbg_info(n), current_ir_graph,
block, n, mode);
DBG_OPT_ALGSIM1(oldn, cmp, sel, n, FS_OPT_MUX_TO_ABS);
}
}
- if (mode_is_int(mode) && mode_is_signed(mode) &&
- get_mode_arithmetic(mode) == irma_twos_complement) {
- ir_node *x = get_Cmp_left(cmp);
-
- /* the following optimization works only with signed integer two-complement mode */
-
- if (mode == get_irn_mode(x)) {
- /*
- * FIXME: this restriction is two rigid, as it would still
- * work if mode(x) = Hs and mode == Is, but at least it removes
- * all wrong cases.
- */
- if ((pn == pn_Cmp_Lt || pn == pn_Cmp_Le) &&
- is_Const(t) && is_Const_all_one(t) &&
- is_Const(f) && is_Const_null(f)) {
- /*
- * Mux(x:T </<= 0, 0, -1) -> Shrs(x, sizeof_bits(T) - 1)
- * Conditions:
- * T must be signed.
- */
- n = new_rd_Shrs(get_irn_dbg_info(n),
- current_ir_graph, block, x,
- new_r_Const_long(current_ir_graph, block, mode_Iu,
- get_mode_size_bits(mode) - 1),
- mode);
- DBG_OPT_ALGSIM1(oldn, cmp, sel, n, FS_OPT_MUX_TO_SHR);
- return n;
- } else if ((pn == pn_Cmp_Gt || pn == pn_Cmp_Ge) &&
- is_Const(t) && is_Const_one(t) &&
- is_Const(f) && is_Const_null(f)) {
- /*
- * Mux(x:T >/>= 0, 0, 1) -> Shr(-x, sizeof_bits(T) - 1)
- * Conditions:
- * T must be signed.
- */
- n = new_rd_Shr(get_irn_dbg_info(n),
- current_ir_graph, block,
- new_r_Minus(current_ir_graph, block, x, mode),
- new_r_Const_long(current_ir_graph, block, mode_Iu,
- get_mode_size_bits(mode) - 1),
- mode);
- DBG_OPT_ALGSIM1(oldn, cmp, sel, n, FS_OPT_MUX_TO_SHR);
- return n;
+ if (mode_is_int(mode)) {
+ /* integer only */
+ if (pn == pn_Cmp_Eq) {
+ ir_node *tmp = t;
+ t = f;
+ f = tmp;
+ pn = pn_Cmp_Lg;
+ }
+ if (pn == pn_Cmp_Lg && is_And(cmp_l)) {
+ /* Psi((a & b) != 0, c, 0) */
+ ir_node *and_r = get_And_right(cmp_l);
+ ir_node *and_l;
+
+ if (and_r == t && f == cmp_r) {
+ if (is_Const(t) && tarval_is_single_bit(get_Const_tarval(t))) {
+ /* Psi((a & 2^C) != 0, 2^C, 0) */
+ n = cmp_l;
+ return n;
+ }
+ }
+ if (and_r == f && t == cmp_r) {
+ if (is_Const(f) && tarval_is_single_bit(get_Const_tarval(f))) {
+ /* Psi((a & 2^C) != 0, 0, 2^C) */
+ n = new_rd_Eor(get_irn_dbg_info(n), current_ir_graph,
+ block, cmp_l, f, mode);
+ return n;
+ }
+ }
+ if (is_Shl(and_r)) {
+ ir_node *shl_l = get_Shl_left(and_r);
+ if (is_Const(shl_l) && is_Const_one(shl_l)) {
+ if (and_r == t && f == cmp_r) {
+ /* (a & (1 << n)) != 0, (1 << n), 0) */
+ n = cmp_l;
+ return n;
+ }
+ else if (and_r == f && t == cmp_r) {
+ /* (a & (1 << n)) != 0, 0, (1 << n)) */
+ n = new_rd_Eor(get_irn_dbg_info(n), current_ir_graph,
+ block, cmp_l, f, mode);
+ return n;
+ }
+ }
+ }
+ and_l = get_And_left(cmp_l);
+ if (is_Shl(and_l)) {
+ ir_node *shl_l = get_Shl_left(and_l);
+ if (is_Const(shl_l) && is_Const_one(shl_l)) {
+ if (and_l == t && f == cmp_r) {
+ /* ((1 << n) & a) != 0, (1 << n), 0) */
+ n = cmp_l;
+ return n;
+ }
+ else if (and_l == f && t == cmp_r) {
+ /* ((1 << n) & a) != 0, 0, (1 << n)) */
+ n = new_rd_Eor(get_irn_dbg_info(n), current_ir_graph,
+ block, cmp_l, f, mode);
+ return n;
+ }
+ }
}
}
}
return n;
} /* transform_node_Psi */
+/**
+ * optimize sync nodes that have other syncs as input we simply add the inputs
+ * of the other sync to our own inputs
+ */
+static ir_node *transform_node_Sync(ir_node *n) {
+ int arity = get_Sync_n_preds(n);
+ int i;
+
+ for (i = 0; i < arity;) {
+ ir_node *pred = get_Sync_pred(n, i);
+ int pred_arity;
+ int j;
+
+ if (!is_Sync(pred)) {
+ ++i;
+ continue;
+ }
+
+ del_Sync_n(n, i);
+ --arity;
+
+ pred_arity = get_Sync_n_preds(pred);
+ for (j = 0; j < pred_arity; ++j) {
+ ir_node *pred_pred = get_Sync_pred(pred, j);
+ int k;
+
+ for (k = 0;; ++k) {
+ if (k >= arity) {
+ add_irn_n(n, pred_pred);
+ ++arity;
+ break;
+ }
+ if (get_Sync_pred(n, k) == pred_pred) break;
+ }
+ }
+ }
+
+ /* rehash the sync node */
+ add_identities(current_ir_graph->value_table, n);
+
+ return n;
+}
+
/**
* Tries several [inplace] [optimizing] transformations and returns an
* equivalent node. The difference to equivalent_node() is that these
CASE(Shr);
CASE(Shrs);
CASE(Shl);
+ CASE(Rot);
+ CASE(Conv);
CASE(End);
CASE(Mux);
CASE(Psi);
+ CASE(Sync);
default:
/* leave NULL */;
}
static int node_cmp_attr_SymConst(ir_node *a, ir_node *b) {
const symconst_attr *pa = get_irn_symconst_attr(a);
const symconst_attr *pb = get_irn_symconst_attr(b);
- return (pa->num != pb->num)
+ return (pa->kind != pb->kind)
|| (pa->sym.type_p != pb->sym.type_p)
|| (pa->tp != pb->tp);
} /* node_cmp_attr_SymConst */
/** Compares the attributes of two Call nodes. */
static int node_cmp_attr_Call(ir_node *a, ir_node *b) {
- return (get_irn_call_attr(a) != get_irn_call_attr(b));
+ return get_irn_call_attr(a) != get_irn_call_attr(b);
} /* node_cmp_attr_Call */
/** Compares the attributes of two Sel nodes. */
/* we can only enter this function if both nodes have the same number of inputs,
hence it is enough to check if one of them is a Phi0 */
if (is_Phi0(a)) {
- /* check the Phi0 attribute */
- return get_irn_phi0_attr(a) != get_irn_phi0_attr(b);
+ /* check the Phi0 pos attribute */
+ return get_irn_phi_attr(a)->u.pos != get_irn_phi_attr(b)->u.pos;
}
return 0;
} /* node_cmp_attr_Phi */
get_Store_volatility(b) == volatility_is_volatile);
} /* node_cmp_attr_Store */
+/** Compares two exception attributes */
+static int node_cmp_exception(ir_node *a, ir_node *b) {
+ const except_attr *ea = get_irn_except_attr(a);
+ const except_attr *eb = get_irn_except_attr(b);
+
+ return ea->pin_state != eb->pin_state;
+}
+
+#define node_cmp_attr_Bound node_cmp_exception
+
+/** Compares the attributes of two Div nodes. */
+static int node_cmp_attr_Div(ir_node *a, ir_node *b) {
+ const divmod_attr *ma = get_irn_divmod_attr(a);
+ const divmod_attr *mb = get_irn_divmod_attr(b);
+ return ma->exc.pin_state != mb->exc.pin_state ||
+ ma->res_mode != mb->res_mode ||
+ ma->no_remainder != mb->no_remainder;
+} /* node_cmp_attr_Div */
+
+/** Compares the attributes of two DivMod nodes. */
+static int node_cmp_attr_DivMod(ir_node *a, ir_node *b) {
+ const divmod_attr *ma = get_irn_divmod_attr(a);
+ const divmod_attr *mb = get_irn_divmod_attr(b);
+ return ma->exc.pin_state != mb->exc.pin_state ||
+ ma->res_mode != mb->res_mode;
+} /* node_cmp_attr_DivMod */
+
+/** Compares the attributes of two Mod nodes. */
+static int node_cmp_attr_Mod(ir_node *a, ir_node *b) {
+ const divmod_attr *ma = get_irn_divmod_attr(a);
+ const divmod_attr *mb = get_irn_divmod_attr(b);
+ return ma->exc.pin_state != mb->exc.pin_state ||
+ ma->res_mode != mb->res_mode;
+} /* node_cmp_attr_Mod */
+
+/** Compares the attributes of two Quot nodes. */
+static int node_cmp_attr_Quot(ir_node *a, ir_node *b) {
+ const divmod_attr *ma = get_irn_divmod_attr(a);
+ const divmod_attr *mb = get_irn_divmod_attr(b);
+ return ma->exc.pin_state != mb->exc.pin_state ||
+ ma->res_mode != mb->res_mode;
+} /* node_cmp_attr_Quot */
+
/** Compares the attributes of two Confirm nodes. */
static int node_cmp_attr_Confirm(ir_node *a, ir_node *b) {
return (get_Confirm_cmp(a) != get_Confirm_cmp(b));
CASE(Store);
CASE(Confirm);
CASE(ASM);
+ CASE(Div);
+ CASE(DivMod);
+ CASE(Mod);
+ CASE(Quot);
+ CASE(Bound);
+ /* FIXME CopyB */
default:
/* leave NULL */;
}
} /* firm_set_default_node_cmp_attr */
/*
- * Compare function for two nodes in the hash table. Gets two
- * nodes as parameters. Returns 0 if the nodes are a cse.
+ * Compare function for two nodes in the value table. Gets two
+ * nodes as parameters. Returns 0 if the nodes are a Common Sub Expression.
*/
int identities_cmp(const void *elt, const void *key) {
- ir_node *a, *b;
+ ir_node *a = (ir_node *)elt;
+ ir_node *b = (ir_node *)key;
int i, irn_arity_a;
- a = (void *)elt;
- b = (void *)key;
-
if (a == b) return 0;
if ((get_irn_op(a) != get_irn_op(b)) ||
(get_irn_mode(a) != get_irn_mode(b))) return 1;
/* compare if a's in and b's in are of equal length */
- irn_arity_a = get_irn_intra_arity (a);
+ irn_arity_a = get_irn_intra_arity(a);
if (irn_arity_a != get_irn_intra_arity(b))
return 1;
- /* for block-local cse and op_pin_state_pinned nodes: */
- if (!get_opt_global_cse() || (get_irn_pinned(a) == op_pin_state_pinned)) {
+ if (get_irn_pinned(a) == op_pin_state_pinned) {
+ /* for pinned nodes, the block inputs must be equal */
if (get_irn_intra_n(a, -1) != get_irn_intra_n(b, -1))
return 1;
+ } else if (! get_opt_global_cse()) {
+ /* for block-local CSE both nodes must be in the same MacroBlock */
+ if (get_irn_MacroBlock(a) != get_irn_MacroBlock(b))
+ return 1;
}
/* compare a->in[0..ins] with b->in[0..ins] */
} /* del_identities */
/**
- * Normalize a node by putting constants (and operands with smaller
- * node index) on the right
+ * Normalize a node by putting constants (and operands with larger
+ * node index) on the right (operator side).
*
* @param n The node to normalize
*/
static void normalize_node(ir_node *n) {
- if (get_opt_reassociation()) {
- if (is_op_commutative(get_irn_op(n))) {
- ir_node *l = get_binop_left(n);
- ir_node *r = get_binop_right(n);
- int l_idx = get_irn_idx(l);
- int r_idx = get_irn_idx(r);
-
- /* For commutative operators perform a OP b == b OP a but keep
- constants on the RIGHT side. This helps greatly in some optimizations.
- Moreover we use the idx number to make the form deterministic. */
- if (is_irn_constlike(l))
- l_idx = -l_idx;
- if (is_irn_constlike(r))
- r_idx = -r_idx;
- if (l_idx < r_idx) {
- set_binop_left(n, r);
- set_binop_right(n, l);
- }
+ if (is_op_commutative(get_irn_op(n))) {
+ ir_node *l = get_binop_left(n);
+ ir_node *r = get_binop_right(n);
+
+ /* For commutative operators perform a OP b == b OP a but keep
+ * constants on the RIGHT side. This helps greatly in some
+ * optimizations. Moreover we use the idx number to make the form
+ * deterministic. */
+ if (!operands_are_normalized(l, r)) {
+ set_binop_left(n, r);
+ set_binop_right(n, l);
}
}
} /* normalize_node */
+/**
+ * Update the nodes after a match in the value table. If both nodes have
+ * the same MacroBlock but different Blocks, we must ensure that the node
+ * with the dominating Block (the node that is near to the MacroBlock header
+ * is stored in the table.
+ * Because a MacroBlock has only one "non-exception" flow, we don't need
+ * dominance info here: We known, that one block must dominate the other and
+ * following the only block input will allow to find it.
+ */
+static void update_known_irn(ir_node *known_irn, const ir_node *new_ir_node) {
+ ir_node *known_blk, *new_block, *block, *mbh;
+
+ if (get_opt_global_cse()) {
+ /* Block inputs are meaning less */
+ return;
+ }
+ known_blk = get_irn_n(known_irn, -1);
+ new_block = get_irn_n(new_ir_node, -1);
+ if (known_blk == new_block) {
+ /* already in the same block */
+ return;
+ }
+ /*
+ * We expect the typical case when we built the graph. In that case, the
+ * known_irn is already the upper one, so checking this should be faster.
+ */
+ block = new_block;
+ mbh = get_Block_MacroBlock(new_block);
+ for (;;) {
+ if (block == known_blk) {
+ /* ok, we have found it: known_block dominates new_block as expected */
+ return;
+ }
+ if (block == mbh) {
+ /*
+ * We have reached the MacroBlock header NOT founding
+ * the known_block. new_block must dominate known_block.
+ * Update known_irn.
+ */
+ set_irn_n(known_irn, -1, new_block);
+ return;
+ }
+ assert(get_Block_n_cfgpreds(block) == 1);
+ block = get_Block_cfgpred_block(block, 0);
+ }
+} /* update_value_table */
+
/**
* Return the canonical node computing the same value as n.
*
normalize_node(n);
o = pset_find(value_table, n, ir_node_hash(n));
- if (!o) return n;
+ if (o == NULL)
+ return n;
+ update_known_irn(o, n);
DBG_OPT_CSE(n, o);
return o;
* During construction we set the op_pin_state_pinned flag in the graph right when the
* optimization is performed. The flag turning on procedure global cse could
* be changed between two allocations. This way we are safe.
+ *
+ * @param value_table The value table
+ * @param n The node to lookup
*/
static INLINE ir_node *identify_cons(pset *value_table, ir_node *n) {
ir_node *old = n;
n = identify(value_table, n);
- if (get_irn_n(old, -1) != get_irn_n(n, -1))
+ if (n != old && get_irn_MacroBlock(old) != get_irn_MacroBlock(n))
set_irg_pinned(current_ir_graph, op_pin_state_floats);
return n;
} /* identify_cons */
* Return the canonical node computing the same value as n.
* Looks up the node in a hash table, enters it in the table
* if it isn't there yet.
+ *
+ * @param value_table the HashSet containing all nodes in the
+ * current IR graph
+ * @param n the node to look up
+ *
+ * @return a node that computes the same value as n or n if no such
+ * node could be found
*/
ir_node *identify_remember(pset *value_table, ir_node *n) {
ir_node *o = NULL;
o = pset_insert(value_table, n, ir_node_hash(n));
if (o != n) {
+ update_known_irn(o, n);
DBG_OPT_CSE(n, o);
}
ir_node *block = get_nodes_block(skip_Proj(node));
/* Don't optimize nodes in immature blocks. */
- if (!get_Block_matured(block)) return node;
+ if (!get_Block_matured(block))
+ return node;
/* Don't optimize End, may have Bads. */
if (op == op_End) return node;
if (is_Block(block)) {
- irn_arity = get_irn_arity(block);
- for (i = 0; i < irn_arity; i++) {
+ if (is_Block_dead(block)) {
+ /* control flow from dead block is dead */
+ return new_Bad();
+ }
+
+ for (i = get_irn_arity(block) - 1; i >= 0; --i) {
if (!is_Bad(get_irn_n(block, i)))
break;
}
- if (i == irn_arity) {
+ if (i < 0) {
ir_graph *irg = get_irn_irg(block);
/* the start block is never dead */
if (block != get_irg_start_block(irg)
- && block != get_irg_end_block(irg))
+ && block != get_irg_end_block(irg)) {
+ /*
+ * Do NOT kill control flow without setting
+ * the block to dead of bad things can happen:
+ * We get a Block that is not reachable be irg_block_walk()
+ * but can be found by irg_walk()!
+ */
+ set_Block_dead(block);
return new_Bad();
+ }
}
}
}
* Beware: we can only read the block of a non-floating node.
*/
if (is_irn_pinned_in_irg(node) &&
- is_Block_dead(get_nodes_block(node)))
+ is_Block_dead(get_nodes_block(skip_Proj(node))))
return new_Bad();
for (i = 0; i < irn_arity; i++) {
ir_node *oldn = n;
ir_opcode iro = get_irn_opcode(n);
- if (!get_opt_optimize() && (get_irn_op(n) != op_Phi)) return n;
+ if (!get_opt_optimize() && !is_Phi(n)) return n;
/* constant expression evaluation / constant folding */
if (get_opt_constant_folding()) {
projects / libfirm / blobdiff