/* Make types visible to allow most efficient access */
#include "entity_t.h"
+/**
+ * Returns the tarval of a Const node or tarval_bad for all other nodes.
+ */
+static tarval *default_value_of(const ir_node *n) {
+ if (is_Const(n))
+ return get_Const_tarval(n); /* might return tarval_bad */
+ else
+ return tarval_bad;
+}
+
+value_of_func value_of_ptr = default_value_of;
+
+void set_value_of_func(value_of_func func) {
+ if (func != NULL)
+ value_of_ptr = func;
+ else
+ value_of_ptr = default_value_of;
+}
+
/**
* Return the value of a Constant.
*/
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)))
+ if ((ta != tarval_bad) && (tb != tarval_bad))
return tarval_add(ta, tb);
return tarval_bad;
* Special case: a - a
*/
static tarval *computed_value_Sub(ir_node *n) {
- ir_node *a = get_Sub_left(n);
- ir_node *b = get_Sub_right(n);
- tarval *ta;
- tarval *tb;
+ ir_mode *mode = get_irn_mode(n);
+ ir_node *a = get_Sub_left(n);
+ ir_node *b = get_Sub_right(n);
+ tarval *ta;
+ tarval *tb;
/* a - a */
if (a == b && !is_Bad(a))
- return get_mode_null(get_irn_mode(n));
+ return get_mode_null(mode);
ta = value_of(a);
tb = value_of(b);
- if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b)))
- return tarval_sub(ta, tb);
+ if ((ta != tarval_bad) && (tb != tarval_bad))
+ return tarval_sub(ta, tb, mode);
return tarval_bad;
} /* computed_value_Sub */
return tarval_bad;
} /* computed_value_Mul */
-/**
- * Return the value of a floating point Quot.
- */
-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;
-} /* computed_value_Quot */
-
-/**
- * Calculate the value of an integer Div of two nodes.
- * Special case: 0 / b
- */
-static tarval *do_computed_value_Div(ir_node *a, ir_node *b) {
- tarval *ta = value_of(a);
- tarval *tb = value_of(b);
-
- /* Compute c1 / c2 or 0 / a, a != 0 */
- if (ta != tarval_bad) {
- if ((tb != tarval_bad) && (tb != get_mode_null(get_irn_mode(b)))) /* div by zero: return tarval_bad */
- return tarval_div(ta, tb);
- else if (ta == get_mode_null(get_tarval_mode(ta))) /* 0 / b == 0 */
- return ta;
- }
- return tarval_bad;
-} /* do_computed_value_Div */
-
-/**
- * Return the value of an integer Div.
- */
-static tarval *computed_value_Div(ir_node *n) {
- return do_computed_value_Div(get_Div_left(n), get_Div_right(n));
-} /* computed_value_Div */
-
-/**
- * Calculate the value of an integer Mod of two nodes.
- * Special case: a % 1
- */
-static tarval *do_computed_value_Mod(ir_node *a, ir_node *b) {
- tarval *ta = value_of(a);
- tarval *tb = value_of(b);
-
- /* Compute c1 % c2 or a % 1 */
- if (tb != tarval_bad) {
- if ((ta != tarval_bad) && (tb != get_mode_null(get_tarval_mode(tb)))) /* div by zero: return tarval_bad */
- return tarval_mod(ta, tb);
- else if (tb == get_mode_one(get_tarval_mode(tb))) /* x mod 1 == 0 */
- return get_mode_null(get_irn_mode(a));
- }
- return tarval_bad;
-} /* do_computed_value_Mod */
-
-/**
- * Return the value of an integer Mod.
- */
-static tarval *computed_value_Mod(ir_node *n) {
- return do_computed_value_Mod(get_Mod_left(n), get_Mod_right(n));
-} /* computed_value_Mod */
-
/**
* Return the value of an Abs.
*/
} /* computed_value_Shrs */
/**
- * Return the value of a Rot.
+ * Return the value of a Rotl.
*/
-static tarval *computed_value_Rot(ir_node *n) {
- ir_node *a = get_Rot_left(n);
- ir_node *b = get_Rot_right(n);
+static tarval *computed_value_Rotl(ir_node *n) {
+ ir_node *a = get_Rotl_left(n);
+ ir_node *b = get_Rotl_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_rotl(ta, tb);
}
return tarval_bad;
-} /* computed_value_Rot */
+} /* computed_value_Rotl */
/**
* Return the value of a Conv.
return computed_value_Cmp_Confirm(a, aa, ab, proj_nr);
} /* computed_value_Proj_Cmp */
+/**
+ * Return the value of a floating point Quot.
+ */
+static tarval *do_computed_value_Quot(ir_node *a, ir_node *b) {
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ /* cannot optimize 0 / b = 0 because of NaN */
+ if (ta != tarval_bad && tb != tarval_bad)
+ return tarval_quo(ta, tb);
+ return tarval_bad;
+} /* do_computed_value_Quot */
+
+/**
+ * Calculate the value of an integer Div of two nodes.
+ * Special case: 0 / b
+ */
+static tarval *do_computed_value_Div(ir_node *a, ir_node *b) {
+ tarval *ta = value_of(a);
+ tarval *tb;
+ ir_node *dummy;
+
+ /* Compute c1 / c2 or 0 / a, a != 0 */
+ if (tarval_is_null(ta) && value_not_zero(b, &dummy))
+ return ta; /* 0 / b == 0 */
+ tb = value_of(b);
+ if (ta != tarval_bad && tb != tarval_bad)
+ return tarval_div(ta, tb);
+ return tarval_bad;
+} /* do_computed_value_Div */
+
+/**
+ * Calculate the value of an integer Mod of two nodes.
+ * Special case: a % 1
+ */
+static tarval *do_computed_value_Mod(ir_node *a, ir_node *b) {
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
+
+ /* Compute a % 1 or c1 % c2 */
+ if (tarval_is_one(tb))
+ return get_mode_null(get_irn_mode(a));
+ if (ta != tarval_bad && tb != tarval_bad)
+ return tarval_mod(ta, tb);
+ return tarval_bad;
+} /* do_computed_value_Mod */
+
+
/**
* Return the value of a Proj, handle Proj(Cmp), Proj(Div), Proj(Mod),
* Proj(DivMod) and Proj(Quot).
case iro_Div:
if (get_Proj_proj(n) == pn_Div_res)
- return computed_value(a);
+ return do_computed_value_Div(get_Div_left(a), get_Div_right(a));
break;
case iro_Mod:
if (get_Proj_proj(n) == pn_Mod_res)
- return computed_value(a);
+ return do_computed_value_Mod(get_Mod_left(a), get_Mod_right(a));
break;
case iro_Quot:
* if it has the form Confirm(x, '=', Const).
*/
static tarval *computed_value_Confirm(ir_node *n) {
- return get_Confirm_cmp(n) == pn_Cmp_Eq ?
- value_of(get_Confirm_bound(n)) : tarval_bad;
+ /*
+ * Beware: we might produce Phi(Confirm(x == true), Confirm(x == false)).
+ * Do NOT optimize them away (CondEval wants them), so wait until
+ * remove_confirm is activated.
+ */
+ if (get_opt_remove_confirm()) {
+ if (get_Confirm_cmp(n) == pn_Cmp_Eq) {
+ tarval *tv = value_of(get_Confirm_bound(n));
+ if (tv != tarval_bad)
+ return tv;
+ }
+ }
+ return value_of(get_Confirm_value(n));
} /* computed_value_Confirm */
/**
CASE(Sub);
CASE(Minus);
CASE(Mul);
- CASE(Quot);
- CASE(Div);
- CASE(Mod);
CASE(Abs);
CASE(And);
CASE(Or);
CASE(Shl);
CASE(Shr);
CASE(Shrs);
- CASE(Rot);
+ CASE(Rotl);
CASE(Carry);
CASE(Borrow);
CASE(Conv);
/**
* 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).
ir_node *left, *right;
ir_mode *mode = get_irn_mode(n);
- /* 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))
- return n;
-
n = equivalent_node_neutral_zero(n);
if (n != oldn)
return n;
+ /* 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))
+ return n;
+
left = get_Add_left(n);
right = get_Add_right(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);
+ ir_node *a = get_binop_left(n);
+ ir_node *b = get_binop_right(n);
+ tarval *tb = value_of(b);
- if (is_Const(b) && is_Const_null(b)) {
+ if (tarval_is_null(tb)) {
n = a;
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_NEUTRAL_0);
#define equivalent_node_Shl equivalent_node_left_zero
#define equivalent_node_Shr equivalent_node_left_zero
#define equivalent_node_Shrs equivalent_node_left_zero
-#define equivalent_node_Rot equivalent_node_left_zero
+#define equivalent_node_Rotl equivalent_node_left_zero
/**
* Optimize a - 0 and (a + x) - x (for modes with wrap-around).
ir_node *oldn = n;
ir_node *b;
ir_mode *mode = get_irn_mode(n);
+ tarval *tb;
/* 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))
return n;
- b = get_Sub_right(n);
+ b = get_Sub_right(n);
+ tb = value_of(b);
/* Beware: modes might be different */
- if (is_Const(b) && is_Const_null(b)) {
+ if (tarval_is_null(tb)) {
ir_node *a = get_Sub_left(n);
if (mode == get_irn_mode(a)) {
n = a;
/* we can handle here only the n * n = n bit cases */
if (get_irn_mode(n) == get_irn_mode(a)) {
ir_node *b = get_Mul_right(n);
+ tarval *tv;
- /* Mul is commutative and has again an other neutral element. */
- if (is_Const(a) && is_Const_one(a)) {
- n = b;
- DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_NEUTRAL_1);
- } else if (is_Const(b) && is_Const_one(b)) {
+ /*
+ * Mul is commutative and has again an other neutral element.
+ * Constants are place right, so check this case first.
+ */
+ tv = value_of(b);
+ if (tarval_is_one(tv)) {
n = a;
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_NEUTRAL_1);
+ } else {
+ tv = value_of(a);
+ if (tarval_is_one(tv)) {
+ n = b;
+ DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_NEUTRAL_1);
+ }
}
}
return n;
} /* equivalent_node_Mul */
-/**
- * Optimize a / 1 = a.
- */
-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 (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);
- turn_into_tuple(n, pn_Div_max);
- set_Tuple_pred(n, pn_Div_M, mem);
- set_Tuple_pred(n, pn_Div_X_regular, new_r_Jmp(current_ir_graph, blk));
- set_Tuple_pred(n, pn_Div_X_except, new_Bad()); /* no exception */
- set_Tuple_pred(n, pn_Div_res, a);
- }
- return n;
-} /* equivalent_node_Div */
-
-/**
- * Optimize a / 1.0 = a.
- */
-static ir_node *equivalent_node_Quot(ir_node *n) {
- ir_node *a = get_Quot_left(n);
- ir_node *b = get_Quot_right(n);
-
- /* Div is not commutative. */
- 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);
- turn_into_tuple(n, pn_Quot_max);
- set_Tuple_pred(n, pn_Quot_M, mem);
- set_Tuple_pred(n, pn_Quot_X_regular, new_r_Jmp(current_ir_graph, blk));
- set_Tuple_pred(n, pn_Quot_X_except, new_Bad()); /* no exception */
- set_Tuple_pred(n, pn_Quot_res, a);
- }
- return n;
-} /* equivalent_node_Quot */
-
-/**
- * Optimize a / 1 = a.
- */
-static ir_node *equivalent_node_DivMod(ir_node *n) {
- ir_node *b = get_DivMod_right(n);
-
- /* Div is not commutative. */
- 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);
- ir_node *blk = get_irn_n(n, -1);
- ir_mode *mode = get_DivMod_resmode(n);
-
- turn_into_tuple(n, pn_DivMod_max);
- 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, new_Const(mode, get_mode_null(mode)));
- }
- return n;
-} /* equivalent_node_DivMod */
-
/**
* Use algebraic simplification a | a = a | 0 = 0 | a = a.
*/
ir_mode *n_mode = get_irn_mode(n);
ir_mode *a_mode = get_irn_mode(a);
+restart:
if (n_mode == a_mode) { /* No Conv necessary */
if (get_Conv_strict(n)) {
/* special case: the predecessor might be a also a Conv */
if (is_Conv(a)) {
if (! get_Conv_strict(a)) {
/* first one is not strict, kick it */
- set_Conv_op(n, get_Conv_op(a));
- return n;
+ a = get_Conv_op(a);
+ a_mode = get_irn_mode(a);
+ set_Conv_op(n, a);
+ goto restart;
}
- /* else both are strict conv, second is superflous */
- } else if(is_Proj(a)) {
+ /* else both are strict conv, second is superfluous */
+ } else if (is_Proj(a)) {
ir_node *pred = get_Proj_pred(a);
- if(is_Load(pred)) {
+ if (is_Load(pred)) {
/* loads always return with the exact precision of n_mode */
assert(get_Load_mode(pred) == n_mode);
return a;
ir_node *b = get_Conv_op(a);
ir_mode *b_mode = get_irn_mode(b);
+ if (get_Conv_strict(n) && get_Conv_strict(a)) {
+ /* both are strict conv */
+ if (smaller_mode(a_mode, n_mode)) {
+ /* both are strict, but the first is smaller, so
+ the second cannot remove more precision, remove the
+ strict bit */
+ set_Conv_strict(n, 0);
+ }
+ }
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 (get_mode_size_bits(b_mode) <= get_mode_size_bits(a_mode)) {
- n = b; /* ConvS(ConvL(xxxS(...))) == xxxS(...) */
+ if (! get_Conv_strict(n) && ! get_Conv_strict(a)) {
+ if (n_mode == mode_b) {
+ n = b; /* Convb(Conv*(xxxb(...))) == xxxb(...) */
+ DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_CONV);
+ } else if (get_mode_arithmetic(n_mode) == get_mode_arithmetic(a_mode)) {
+ if (smaller_mode(b_mode, a_mode)) {
+ n = b; /* ConvS(ConvL(xxxS(...))) == xxxS(...) */
+ DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_CONV);
+ }
+ }
+ }
+ if (mode_is_int(n_mode) && mode_is_float(a_mode)) {
+ /* ConvI(ConvF(I)) -> I, iff float mantissa >= int mode */
+ size_t int_mantissa = get_mode_size_bits(n_mode) - (mode_is_signed(n_mode) ? 1 : 0);
+ size_t float_mantissa;
+ /* FIXME There is no way to get the mantissa size of a mode */
+ switch (get_mode_size_bits(a_mode)) {
+ case 32: float_mantissa = 23 + 1; break; // + 1 for implicit 1
+ case 64: float_mantissa = 52 + 1; break;
+ case 80: float_mantissa = 64 + 1; break;
+ default: float_mantissa = 0; break;
+ }
+ if (float_mantissa != 0 && float_mantissa >= int_mantissa) {
+ n = b;
+ DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_CONV);
+ return n;
+ }
+ }
+ if (is_Conv(b)) {
+ if (smaller_mode(b_mode, a_mode)) {
+ if (get_Conv_strict(n))
+ set_Conv_strict(b, 1);
+ n = b; /* ConvA(ConvB(ConvA(...))) == ConvA(...) */
DBG_OPT_ALGSIM1(oldn, a, b, n, FS_OPT_CONV);
}
}
for (i = 0; i < n_preds; ++i) {
first_val = get_Phi_pred(n, i);
if ( (first_val != n) /* not self pointer */
-#if 1
+#if 0
+ /* BEWARE: when the if is changed to 1, Phi's will ignore it's Bad
+ * predecessors. Then, Phi nodes in dead code might be removed, causing
+ * nodes pointing to themself (Add's for instance).
+ * This is really bad and causes endless recursions in several
+ * code pathes, so we do NOT optimize such a code.
+ * This is not that bad as it sounds, optimize_cf() removes bad control flow
+ * (and bad Phi predecessors), so live code is optimized later.
+ */
&& (! is_Bad(first_val))
#endif
) { /* value not dead */
ir_node *scnd_val = get_Phi_pred(n, i);
if ( (scnd_val != n)
&& (scnd_val != first_val)
-#if 1
+#if 0
+ /* see above */
&& (! is_Bad(scnd_val))
#endif
) {
} /* equivalent_node_Sync */
/**
- * Optimize Proj(Tuple) and gigo() for ProjX in Bad block,
- * ProjX(Load) and ProjX(Store).
+ * Optimize Proj(Tuple).
*/
-static ir_node *equivalent_node_Proj(ir_node *proj) {
+static ir_node *equivalent_node_Proj_Tuple(ir_node *proj) {
+ ir_node *oldn = proj;
+ ir_node *tuple = get_Proj_pred(proj);
+
+ /* Remove the Tuple/Proj combination. */
+ proj = get_Tuple_pred(tuple, get_Proj_proj(proj));
+ DBG_OPT_TUPLE(oldn, tuple, proj);
+
+ return proj;
+} /* equivalent_node_Proj_Tuple */
+
+/**
+ * Optimize a / 1 = a.
+ */
+static ir_node *equivalent_node_Proj_Div(ir_node *proj) {
ir_node *oldn = proj;
- ir_node *a = get_Proj_pred(proj);
+ ir_node *div = get_Proj_pred(proj);
+ ir_node *b = get_Div_right(div);
+ tarval *tb = value_of(b);
- 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));
- DBG_OPT_TUPLE(oldn, a, proj);
- } else {
- /* This should not happen! */
- assert(! "found a Proj with higher number than Tuple predecessors");
- proj = new_Bad();
- }
- } else if (get_irn_mode(proj) == mode_X) {
- if (is_Block_dead(get_nodes_block(skip_Proj(proj)))) {
- /* Remove dead control flow -- early gigo(). */
- proj = new_Bad();
- } else if (get_opt_ldst_only_null_ptr_exceptions()) {
- if (is_Load(a)) {
- /* get the Load address */
- ir_node *addr = get_Load_ptr(a);
- ir_node *blk = get_irn_n(a, -1);
- ir_node *confirm;
-
- if (value_not_null(addr, &confirm)) {
- if (confirm == NULL) {
- /* this node may float if it did not depend on a Confirm */
- set_irn_pinned(a, op_pin_state_floats);
- }
- if (get_Proj_proj(proj) == pn_Load_X_except) {
- DBG_OPT_EXC_REM(proj);
- return new_Bad();
- } else
- return new_r_Jmp(current_ir_graph, blk);
- }
- } 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);
- ir_node *confirm;
-
- if (value_not_null(addr, &confirm)) {
- if (confirm == NULL) {
- /* this node may float if it did not depend on a Confirm */
- set_irn_pinned(a, op_pin_state_floats);
- }
- if (get_Proj_proj(proj) == pn_Store_X_except) {
- DBG_OPT_EXC_REM(proj);
- return new_Bad();
- } else
- return new_r_Jmp(current_ir_graph, blk);
+ /* Div is not commutative. */
+ if (tarval_is_one(tb)) { /* div(x, 1) == x */
+ switch (get_Proj_proj(proj)) {
+ case pn_Div_M:
+ proj = get_Div_mem(div);
+ DBG_OPT_ALGSIM0(oldn, proj, FS_OPT_NEUTRAL_1);
+ return proj;
+
+ case pn_Div_res:
+ proj = get_Div_left(div);
+ DBG_OPT_ALGSIM0(oldn, proj, FS_OPT_NEUTRAL_1);
+ return proj;
+
+ default:
+ /* we cannot replace the exception Proj's here, this is done in
+ transform_node_Proj_Div() */
+ return proj;
+ }
+ }
+ return proj;
+} /* equivalent_node_Proj_Div */
+
+/**
+ * Optimize a / 1.0 = a.
+ */
+static ir_node *equivalent_node_Proj_Quot(ir_node *proj) {
+ ir_node *oldn = proj;
+ ir_node *quot = get_Proj_pred(proj);
+ ir_node *b = get_Quot_right(quot);
+ tarval *tb = value_of(b);
+
+ /* Div is not commutative. */
+ if (tarval_is_one(tb)) { /* Quot(x, 1) == x */
+ switch (get_Proj_proj(proj)) {
+ case pn_Quot_M:
+ proj = get_Quot_mem(quot);
+ DBG_OPT_ALGSIM0(oldn, proj, FS_OPT_NEUTRAL_1);
+ return proj;
+
+ case pn_Quot_res:
+ proj = get_Quot_left(quot);
+ DBG_OPT_ALGSIM0(oldn, proj, FS_OPT_NEUTRAL_1);
+ return proj;
+
+ default:
+ /* we cannot replace the exception Proj's here, this is done in
+ transform_node_Proj_Quot() */
+ return proj;
+ }
+ }
+ return proj;
+} /* equivalent_node_Proj_Quot */
+
+/**
+ * Optimize a / 1 = a.
+ */
+static ir_node *equivalent_node_Proj_DivMod(ir_node *proj) {
+ ir_node *oldn = proj;
+ ir_node *divmod = get_Proj_pred(proj);
+ ir_node *b = get_DivMod_right(divmod);
+ tarval *tb = value_of(b);
+
+ /* Div is not commutative. */
+ if (tarval_is_one(tb)) { /* div(x, 1) == x */
+ switch (get_Proj_proj(proj)) {
+ case pn_DivMod_M:
+ proj = get_DivMod_mem(divmod);
+ DBG_OPT_ALGSIM0(oldn, proj, FS_OPT_NEUTRAL_1);
+ return proj;
+
+ case pn_DivMod_res_div:
+ proj = get_DivMod_left(divmod);
+ DBG_OPT_ALGSIM0(oldn, proj, FS_OPT_NEUTRAL_1);
+ return proj;
+
+ default:
+ /* we cannot replace the exception Proj's here, this is done in
+ transform_node_Proj_DivMod().
+ Note further that the pn_DivMod_res_div case is handled in
+ computed_value_Proj(). */
+ return proj;
+ }
+ }
+ return proj;
+} /* equivalent_node_Proj_DivMod */
+
+/**
+ * Optimize CopyB(mem, x, x) into a Nop.
+ */
+static ir_node *equivalent_node_Proj_CopyB(ir_node *proj) {
+ ir_node *oldn = proj;
+ ir_node *copyb = get_Proj_pred(proj);
+ ir_node *a = get_CopyB_dst(copyb);
+ ir_node *b = get_CopyB_src(copyb);
+
+ if (a == b) {
+ /* Turn CopyB into a tuple (mem, jmp, bad, bad) */
+ switch (get_Proj_proj(proj)) {
+ case pn_CopyB_M_regular:
+ proj = get_CopyB_mem(copyb);
+ DBG_OPT_ALGSIM0(oldn, proj, FS_OPT_NOP);
+ break;
+
+ case pn_CopyB_M_except:
+ case pn_CopyB_X_except:
+ DBG_OPT_EXC_REM(proj);
+ proj = get_irg_bad(current_ir_graph);
+ break;
+ }
+ }
+ return proj;
+} /* equivalent_node_Proj_CopyB */
+
+/**
+ * Optimize Bounds(idx, idx, upper) into idx.
+ */
+static ir_node *equivalent_node_Proj_Bound(ir_node *proj) {
+ ir_node *oldn = proj;
+ ir_node *bound = get_Proj_pred(proj);
+ ir_node *idx = get_Bound_index(bound);
+ ir_node *pred = skip_Proj(idx);
+ int ret_tuple = 0;
+
+ if (idx == get_Bound_lower(bound))
+ ret_tuple = 1;
+ else 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(bound);
+ ir_node *upper = get_Bound_upper(bound);
+ if (get_Bound_lower(pred) == lower &&
+ get_Bound_upper(pred) == upper &&
+ get_irn_MacroBlock(bound) == get_irn_MacroBlock(pred)) {
+ /*
+ * 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;
+ }
+ }
+ if (ret_tuple) {
+ /* Turn Bound into a tuple (mem, jmp, bad, idx) */
+ switch (get_Proj_proj(proj)) {
+ case pn_Bound_M:
+ DBG_OPT_EXC_REM(proj);
+ proj = get_Bound_mem(bound);
+ break;
+ case pn_Bound_X_except:
+ DBG_OPT_EXC_REM(proj);
+ proj = get_irg_bad(current_ir_graph);
+ break;
+ case pn_Bound_res:
+ proj = idx;
+ DBG_OPT_ALGSIM0(oldn, proj, FS_OPT_NOP);
+ break;
+ default:
+ /* cannot optimize pn_Bound_X_regular, handled in transform ... */
+ ;
+ }
+ }
+ return proj;
+} /* equivalent_node_Proj_Bound */
+
+/**
+ * Optimize an Exception Proj(Load) with a non-null address.
+ */
+static ir_node *equivalent_node_Proj_Load(ir_node *proj) {
+ if (get_opt_ldst_only_null_ptr_exceptions()) {
+ if (get_irn_mode(proj) == mode_X) {
+ ir_node *oldn = proj;
+ ir_node *load = get_Proj_pred(proj);
+
+ /* get the Load address */
+ ir_node *addr = get_Load_ptr(load);
+ ir_node *blk = get_nodes_block(load);
+ ir_node *confirm;
+
+ if (value_not_null(addr, &confirm)) {
+ if (get_Proj_proj(proj) == pn_Load_X_except) {
+ DBG_OPT_EXC_REM(proj);
+ return get_irg_bad(current_ir_graph);
}
}
}
}
+ return proj;
+} /* equivalent_node_Proj_Load */
+/**
+ * Optimize an Exception Proj(Store) with a non-null address.
+ */
+static ir_node *equivalent_node_Proj_Store(ir_node *proj) {
+ if (get_opt_ldst_only_null_ptr_exceptions()) {
+ if (get_irn_mode(proj) == mode_X) {
+ ir_node *oldn = proj;
+ ir_node *store = get_Proj_pred(proj);
+
+ /* get the load/store address */
+ ir_node *addr = get_Store_ptr(store);
+ ir_node *blk = get_nodes_block(store);
+ ir_node *confirm;
+
+ if (value_not_null(addr, &confirm)) {
+ if (get_Proj_proj(proj) == pn_Store_X_except) {
+ DBG_OPT_EXC_REM(proj);
+ return get_irg_bad(current_ir_graph);
+ }
+ }
+ }
+ }
return proj;
+} /* equivalent_node_Proj_Store */
+
+/**
+ * Does all optimizations on nodes that must be done on it's Proj's
+ * because of creating new nodes.
+ */
+static ir_node *equivalent_node_Proj(ir_node *proj) {
+ ir_node *n = get_Proj_pred(proj);
+
+ switch (get_irn_opcode(n)) {
+ case iro_Div:
+ return equivalent_node_Proj_Div(proj);
+
+ case iro_DivMod:
+ return equivalent_node_Proj_DivMod(proj);
+
+ case iro_Quot:
+ return equivalent_node_Proj_DivMod(proj);
+
+ case iro_Tuple:
+ return equivalent_node_Proj_Tuple(proj);
+
+ case iro_CopyB:
+ return equivalent_node_Proj_CopyB(proj);
+
+ case iro_Bound:
+ return equivalent_node_Proj_Bound(proj);
+
+ case iro_Load:
+ return equivalent_node_Proj_Load(proj);
+
+ case iro_Store:
+ return equivalent_node_Proj_Store(proj);
+
+ default:
+ if (get_irn_mode(proj) == mode_X) {
+ if (is_Block_dead(get_nodes_block(n))) {
+ /* Remove dead control flow -- early gigo(). */
+ proj = get_irg_bad(current_ir_graph);
+ }
+ }
+ return proj;
+ }
} /* equivalent_node_Proj */
/**
do {
n = get_Id_pred(n);
- } while (get_irn_op(n) == op_Id);
+ } while (is_Id(n));
DBG_OPT_ID(oldn, n);
return n;
* 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)) {
+ if (cmp_l == t && tarval_is_null(value_of(cmp_r))) {
/* Mux(t CMP 0, X, t) */
if (is_Minus(f) && get_Minus_op(f) == t) {
/* Mux(t CMP 0, -t, t) */
return n;
} /* equivalent_node_Psi */
-/**
- * Optimize -a CMP -b into b CMP a.
- * This works only for for modes where unary Minus
- * cannot Overflow.
- * Note that two-complement integers can Overflow
- * so it will NOT work.
- *
- * For == and != can be handled in Proj(Cmp)
- */
-static ir_node *equivalent_node_Cmp(ir_node *n) {
- ir_node *left = get_Cmp_left(n);
- ir_node *right = get_Cmp_right(n);
-
- if (is_Minus(left) && is_Minus(right) &&
- !mode_overflow_on_unary_Minus(get_irn_mode(left))) {
- left = get_Minus_op(left);
- right = get_Minus_op(right);
- set_Cmp_left(n, right);
- set_Cmp_right(n, left);
- }
- return n;
-} /* equivalent_node_Cmp */
-
/**
* Remove Confirm nodes if setting is on.
* Replace Confirms(x, '=', Constlike) by Constlike.
ir_node *pred = get_Confirm_value(n);
pn_Cmp pnc = get_Confirm_cmp(n);
- if (is_Confirm(pred) && pnc == get_Confirm_cmp(pred)) {
+ while (is_Confirm(pred) && pnc == get_Confirm_cmp(pred)) {
/*
* rare case: two identical Confirms one after another,
* replace the second one with the first.
*/
- n = pred;
- }
- if (pnc == pn_Cmp_Eq) {
- ir_node *bound = get_Confirm_bound(n);
-
- /*
- * Optimize a rare case:
- * Confirm(x, '=', Constlike) ==> Constlike
- */
- if (is_irn_constlike(bound)) {
- DBG_OPT_CONFIRM(n, bound);
- return bound;
- }
- }
- return get_opt_remove_confirm() ? get_Confirm_value(n) : n;
-}
-
-/**
- * Optimize CopyB(mem, x, x) into a Nop.
- */
-static ir_node *equivalent_node_CopyB(ir_node *n) {
- ir_node *a = get_CopyB_dst(n);
- ir_node *b = get_CopyB_src(n);
-
- if (a == b) {
- /* Turn CopyB into a tuple (mem, jmp, bad, bad) */
- ir_node *mem = get_CopyB_mem(n);
- ir_node *blk = get_nodes_block(n);
- turn_into_tuple(n, pn_CopyB_max);
- set_Tuple_pred(n, pn_CopyB_M, mem);
- set_Tuple_pred(n, pn_CopyB_X_regular, new_r_Jmp(current_ir_graph, blk));
- set_Tuple_pred(n, pn_CopyB_X_except, new_Bad()); /* no exception */
- set_Tuple_pred(n, pn_CopyB_M_except, new_Bad());
+ n = pred;
+ pred = get_Confirm_value(n);
+ pnc = get_Confirm_cmp(n);
}
+ if (get_opt_remove_confirm())
+ return get_Confirm_value(n);
return n;
-} /* equivalent_node_CopyB */
-
-/**
- * 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 *pred = skip_Proj(idx);
- int ret_tuple = 0;
-
- 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)) {
- /*
- * 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;
- }
- }
- if (ret_tuple) {
- /* Turn Bound into a tuple (mem, jmp, bad, idx) */
- ir_node *mem = get_Bound_mem(n);
- ir_node *blk = get_nodes_block(n);
- turn_into_tuple(n, pn_Bound_max);
- set_Tuple_pred(n, pn_Bound_M, mem);
- set_Tuple_pred(n, pn_Bound_X_regular, new_r_Jmp(current_ir_graph, blk)); /* no exception */
- set_Tuple_pred(n, pn_Bound_X_except, new_Bad()); /* no exception */
- set_Tuple_pred(n, pn_Bound_res, idx);
- }
- return n;
-} /* equivalent_node_Bound */
+}
/**
* equivalent_node() returns a node equivalent to input n. It skips all nodes that
CASE(Shl);
CASE(Shr);
CASE(Shrs);
- CASE(Rot);
+ CASE(Rotl);
CASE(Not);
CASE(Minus);
CASE(Mul);
- CASE(Div);
- CASE(Quot);
- CASE(DivMod);
CASE(And);
CASE(Conv);
CASE(Cast);
CASE(Id);
CASE(Mux);
CASE(Psi);
- CASE(Cmp);
CASE(Confirm);
- CASE(CopyB);
- CASE(Bound);
default:
/* leave NULL */;
}
return 1;
} /* is_const_Phi */
+typedef tarval *(*tarval_sub_type)(tarval *a, tarval *b, ir_mode *mode);
+typedef tarval *(*tarval_binop_type)(tarval *a, tarval *b);
+
+/**
+ * Wrapper for the tarval binop evaluation, tarval_sub has one more parameter.
+ */
+static tarval *do_eval(tarval *(*eval)(), tarval *a, tarval *b, ir_mode *mode) {
+ if (eval == tarval_sub) {
+ tarval_sub_type func = (tarval_sub_type)eval;
+
+ return func(a, b, mode);
+ } else {
+ tarval_binop_type func = (tarval_binop_type)eval;
+
+ return func(a, b);
+ }
+}
+
/**
* Apply an evaluator on a binop with a constant operators (and one Phi).
*
*
* @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 *), ir_mode *mode, int left) {
+static ir_node *apply_binop_on_phi(ir_node *phi, tarval *other, tarval *(*eval)(), ir_mode *mode, int left) {
tarval *tv;
void **res;
ir_node *pred;
for (i = 0; i < n; ++i) {
pred = get_irn_n(phi, i);
tv = get_Const_tarval(pred);
- tv = eval(other, tv);
+ tv = do_eval(eval, other, tv, mode);
if (tv == tarval_bad) {
/* folding failed, bad */
for (i = 0; i < n; ++i) {
pred = get_irn_n(phi, i);
tv = get_Const_tarval(pred);
- tv = eval(tv, other);
+ tv = do_eval(eval, tv, other, mode);
if (tv == tarval_bad) {
/* folding failed, bad */
*
* @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) {
+static ir_node *apply_binop_on_2_phis(ir_node *a, ir_node *b, tarval *(*eval)(), ir_mode *mode) {
tarval *tv_l, *tv_r, *tv;
void **res;
ir_node *pred;
tv_l = get_Const_tarval(pred);
pred = get_irn_n(b, i);
tv_r = get_Const_tarval(pred);
- tv = eval(tv_l, tv_r);
+ tv = do_eval(eval, tv_l, tv_r, mode);
if (tv == tarval_bad) {
/* folding failed, bad */
}
}
}
+
return n;
} /* transform_node_AddSub */
b = get_Add_right(n);
mode = get_irn_mode(n);
+
+ if (mode_is_reference(mode)) {
+ ir_mode *lmode = get_irn_mode(a);
+
+ if (is_Const(b) && is_Const_null(b) && mode_is_int(lmode)) {
+ /* an Add(a, NULL) is a hidden Conv */
+ dbg_info *dbg = get_irn_dbg_info(n);
+ return new_rd_Conv(dbg, current_ir_graph, get_nodes_block(n), a, mode);
+ }
+ }
+
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_num(mode)) {
/* the following code leads to endless recursion when Mul are replaced by a simple instruction chain */
if (!is_arch_dep_running() && a == b && mode_is_int(mode)) {
- ir_node *block = get_irn_n(n, -1);
+ ir_node *block = get_nodes_block(n);
n = new_rd_Mul(
get_irn_dbg_info(n),
mode = get_irn_mode(n);
+ if (mode_is_int(mode)) {
+ ir_mode *lmode = get_irn_mode(a);
+
+ if (is_Const(b) && is_Const_null(b) && mode_is_reference(lmode)) {
+ /* a Sub(a, NULL) is a hidden Conv */
+ dbg_info *dbg = get_irn_dbg_info(n);
+ return new_rd_Conv(dbg, current_ir_graph, get_nodes_block(n), a, mode);
+ }
+ }
+
restart:
HANDLE_BINOP_PHI(tarval_sub, a, b, c, mode);
return n;
} /* transform_node_Abs */
+/**
+ * Optimize -a CMP -b into b CMP a.
+ * This works only for for modes where unary Minus
+ * cannot Overflow.
+ * Note that two-complement integers can Overflow
+ * so it will NOT work.
+ *
+ * For == and != can be handled in Proj(Cmp)
+ */
+static ir_node *transform_node_Cmp(ir_node *n) {
+ ir_node *oldn = n;
+ ir_node *left = get_Cmp_left(n);
+ ir_node *right = get_Cmp_right(n);
+
+ if (is_Minus(left) && is_Minus(right) &&
+ !mode_overflow_on_unary_Minus(get_irn_mode(left))) {
+ left = get_Minus_op(left);
+ right = get_Minus_op(right);
+ n = new_rd_Cmp(get_irn_dbg_info(n), current_ir_graph,
+ get_nodes_block(n), left, right);
+ DBG_OPT_ALGSIM0(oldn, n, FS_OPT_CMP_OP_OP);
+ }
+ return n;
+} /* transform_node_Cmp */
+
+
/**
* Transform a Cond node.
*
return n;
} /* transform_node_Cast */
+/**
+ * Transform a Proj(Load) with a non-null address.
+ */
+static ir_node *transform_node_Proj_Load(ir_node *proj) {
+ if (get_opt_ldst_only_null_ptr_exceptions()) {
+ if (get_irn_mode(proj) == mode_X) {
+ ir_node *oldn = proj;
+ ir_node *load = get_Proj_pred(proj);
+
+ /* get the Load address */
+ ir_node *addr = get_Load_ptr(load);
+ ir_node *blk = get_nodes_block(load);
+ ir_node *confirm;
+
+ if (value_not_null(addr, &confirm)) {
+ if (confirm == NULL) {
+ /* this node may float if it did not depend on a Confirm */
+ set_irn_pinned(load, op_pin_state_floats);
+ }
+ if (get_Proj_proj(proj) == pn_Load_X_except) {
+ DBG_OPT_EXC_REM(proj);
+ return get_irg_bad(current_ir_graph);
+ } else {
+ return new_r_Jmp(current_ir_graph, blk);
+ }
+ }
+ }
+ }
+ return proj;
+} /* transform_node_Proj_Load */
+
+/**
+ * Transform a Proj(Store) with a non-null address.
+ */
+static ir_node *transform_node_Proj_Store(ir_node *proj) {
+ if (get_opt_ldst_only_null_ptr_exceptions()) {
+ if (get_irn_mode(proj) == mode_X) {
+ ir_node *oldn = proj;
+ ir_node *store = get_Proj_pred(proj);
+
+ /* get the load/store address */
+ ir_node *addr = get_Store_ptr(store);
+ ir_node *blk = get_nodes_block(store);
+ ir_node *confirm;
+
+ if (value_not_null(addr, &confirm)) {
+ if (confirm == NULL) {
+ /* this node may float if it did not depend on a Confirm */
+ set_irn_pinned(store, op_pin_state_floats);
+ }
+ if (get_Proj_proj(proj) == pn_Store_X_except) {
+ DBG_OPT_EXC_REM(proj);
+ return get_irg_bad(current_ir_graph);
+ } else
+ return new_r_Jmp(current_ir_graph, blk);
+ }
+ }
+ }
+ return proj;
+} /* transform_node_Proj_Store */
+
/**
* Transform a Proj(Div) with a non-zero value.
* Removes the exceptions and routes the memory to the NoMem node.
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);
+ case iro_Rotl:
+ if (get_Rotl_right(left) == get_Rotl_right(right)) {
+ /* a ROTL X CMP b ROTL X ==> a CMP b */
+ left = get_Rotl_left(left);
+ right = get_Rotl_left(right);
changed |= 1;
DBG_OPT_ALGSIM0(n, n, FS_OPT_CMP_OP_OP);
}
/* c > 0 : a < c ==> a <= (c-1) a >= c ==> a > (c-1) */
if ((proj_nr == pn_Cmp_Lt || proj_nr == pn_Cmp_Ge) &&
tarval_cmp(tv, get_mode_null(mode)) == pn_Cmp_Gt) {
- tv = tarval_sub(tv, get_mode_one(mode));
+ tv = tarval_sub(tv, get_mode_one(mode), NULL);
if (tv != tarval_bad) {
proj_nr ^= pn_Cmp_Eq;
}
if (tv2 != tarval_bad) {
- tv2 = tarval_sub(tv, tv2);
+ tv2 = tarval_sub(tv, tv2, NULL);
if (tv2 != tarval_bad) {
left = a;
}
/* -a == c ==> a == -c, -a != c ==> a != -c */
else if (is_Minus(left)) {
- tarval *tv2 = tarval_sub(get_mode_null(mode), tv);
+ tarval *tv2 = tarval_sub(get_mode_null(mode), tv, NULL);
if (tv2 != tarval_bad) {
left = get_Minus_op(left);
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_sub(cond, tv1, NULL);
cond = tarval_shrs(tv, cond);
if (!tarval_is_all_one(cond) && !tarval_is_null(cond)) {
ir_node *blk = get_irn_n(op, -1);
ir_mode *mode = get_irn_mode(v);
- tv = tarval_sub(tv, get_mode_one(mode));
+ tv = tarval_sub(tv, get_mode_one(mode), NULL);
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);
return proj;
} /* transform_node_Proj_Cmp */
+/**
+ * Optimize CopyB(mem, x, x) into a Nop.
+ */
+static ir_node *transform_node_Proj_CopyB(ir_node *proj) {
+ ir_node *oldn = proj;
+ ir_node *copyb = get_Proj_pred(proj);
+ ir_node *a = get_CopyB_dst(copyb);
+ ir_node *b = get_CopyB_src(copyb);
+
+ if (a == b) {
+ switch (get_Proj_proj(proj)) {
+ case pn_CopyB_X_regular:
+ /* Turn CopyB into a tuple (mem, jmp, bad, bad) */
+ DBG_OPT_EXC_REM(proj);
+ proj = new_r_Jmp(current_ir_graph, get_nodes_block(copyb));
+ break;
+ case pn_CopyB_M_except:
+ case pn_CopyB_X_except:
+ DBG_OPT_EXC_REM(proj);
+ proj = get_irg_bad(current_ir_graph);
+ break;
+ default:
+ break;
+ }
+ }
+ return proj;
+} /* transform_node_Proj_CopyB */
+
+/**
+ * Optimize Bounds(idx, idx, upper) into idx.
+ */
+static ir_node *transform_node_Proj_Bound(ir_node *proj) {
+ ir_node *oldn = proj;
+ ir_node *bound = get_Proj_pred(proj);
+ ir_node *idx = get_Bound_index(bound);
+ ir_node *pred = skip_Proj(idx);
+ int ret_tuple = 0;
+
+ if (idx == get_Bound_lower(bound))
+ ret_tuple = 1;
+ else 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(bound);
+ ir_node *upper = get_Bound_upper(bound);
+ if (get_Bound_lower(pred) == lower &&
+ get_Bound_upper(pred) == upper &&
+ get_irn_MacroBlock(bound) == get_irn_MacroBlock(pred)) {
+ /*
+ * 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;
+ }
+ }
+ if (ret_tuple) {
+ /* Turn Bound into a tuple (mem, jmp, bad, idx) */
+ switch (get_Proj_proj(proj)) {
+ case pn_Bound_M:
+ DBG_OPT_EXC_REM(proj);
+ proj = get_Bound_mem(bound);
+ break;
+ case pn_Bound_X_except:
+ DBG_OPT_EXC_REM(proj);
+ proj = get_irg_bad(current_ir_graph);
+ break;
+ case pn_Bound_res:
+ proj = idx;
+ DBG_OPT_ALGSIM0(oldn, proj, FS_OPT_NOP);
+ break;
+ case pn_Bound_X_regular:
+ DBG_OPT_EXC_REM(proj);
+ proj = new_r_Jmp(current_ir_graph, get_nodes_block(bound));
+ break;
+ default:
+ break;
+ }
+ }
+ return proj;
+} /* transform_node_Proj_Bound */
+
/**
* Does all optimizations on nodes that must be done on it's Proj's
* because of creating new nodes.
ir_node *n = get_Proj_pred(proj);
switch (get_irn_opcode(n)) {
+ case iro_Load:
+ return transform_node_Proj_Load(proj);
+
+ case iro_Store:
+ return transform_node_Proj_Store(proj);
+
case iro_Div:
return transform_node_Proj_Div(proj);
/* should not happen, but if it does will be optimized away */
return equivalent_node_Proj(proj);
+ case iro_CopyB:
+ return transform_node_Proj_CopyB(proj);
+
+ case iro_Bound:
+ return transform_node_Proj_CopyB(proj);
+
default:
/* do nothing */
return proj;
} /* transform_node_Or_bf_store */
/**
- * Optimize an Or(shl(x, c), shr(x, bits - c)) into a Rot
+ * Optimize an Or(shl(x, c), shr(x, bits - c)) into a Rotl
*/
-static ir_node *transform_node_Or_Rot(ir_node *or) {
+static ir_node *transform_node_Or_Rotl(ir_node *or) {
ir_mode *mode = get_irn_mode(or);
ir_node *shl, *shr, *block;
- ir_node *irn, *x, *c1, *c2, *v, *sub, *n;
+ ir_node *irn, *x, *c1, *c2, *v, *sub, *n, *rotval;
tarval *tv1, *tv2;
if (! mode_is_int(mode))
return or;
} else if (!is_Shr(shr)) {
return or;
- }
- x = get_Shl_left(shl);
- if (x != get_Shr_left(shr))
- return or;
-
- c1 = get_Shl_right(shl);
- c2 = get_Shr_right(shr);
- if (is_Const(c1) && is_Const(c2)) {
- tv1 = get_Const_tarval(c1);
- if (! tarval_is_long(tv1))
- return or;
-
- tv2 = get_Const_tarval(c2);
- if (! tarval_is_long(tv2))
- return or;
-
- if (get_tarval_long(tv1) + get_tarval_long(tv2)
- != (int) get_mode_size_bits(mode))
- return or;
-
- /* yet, condition met */
- block = get_irn_n(or, -1);
-
- n = new_r_Rot(current_ir_graph, block, x, c1, mode);
-
- DBG_OPT_ALGSIM1(or, shl, shr, n, FS_OPT_OR_SHFT_TO_ROT);
- return n;
- } else if (is_Sub(c1)) {
- v = c2;
- sub = c1;
-
- if (get_Sub_right(sub) != v)
- return or;
-
- c1 = get_Sub_left(sub);
- if (!is_Const(c1))
- return or;
+ }
+ x = get_Shl_left(shl);
+ if (x != get_Shr_left(shr))
+ return or;
+ c1 = get_Shl_right(shl);
+ c2 = get_Shr_right(shr);
+ if (is_Const(c1) && is_Const(c2)) {
tv1 = get_Const_tarval(c1);
if (! tarval_is_long(tv1))
return or;
- if (get_tarval_long(tv1) != (int) get_mode_size_bits(mode))
+ tv2 = get_Const_tarval(c2);
+ if (! tarval_is_long(tv2))
+ return or;
+
+ if (get_tarval_long(tv1) + get_tarval_long(tv2)
+ != (int) get_mode_size_bits(mode))
return or;
/* yet, condition met */
block = get_nodes_block(or);
- /* a Rot right is not supported, so use a rot left */
- n = new_r_Rot(current_ir_graph, block, x, sub, mode);
+ n = new_r_Rotl(current_ir_graph, block, x, c1, mode);
- DBG_OPT_ALGSIM0(or, n, FS_OPT_OR_SHFT_TO_ROT);
+ DBG_OPT_ALGSIM1(or, shl, shr, n, FS_OPT_OR_SHFT_TO_ROTL);
return n;
- } else if (is_Sub(c2)) {
- v = c1;
- sub = c2;
+ }
- c1 = get_Sub_left(sub);
- if (!is_Const(c1))
- return or;
+ if (is_Sub(c1)) {
+ v = c2;
+ sub = c1;
+ rotval = sub; /* a Rot right is not supported, so use a rot left */
+ } else if (is_Sub(c2)) {
+ v = c1;
+ sub = c2;
+ rotval = v;
+ } else return or;
- tv1 = get_Const_tarval(c1);
- if (! tarval_is_long(tv1))
- return or;
+ if (get_Sub_right(sub) != v)
+ return or;
- if (get_tarval_long(tv1) != (int) get_mode_size_bits(mode))
- return or;
+ c1 = get_Sub_left(sub);
+ if (!is_Const(c1))
+ return or;
- /* yet, condition met */
- block = get_irn_n(or, -1);
+ tv1 = get_Const_tarval(c1);
+ if (! tarval_is_long(tv1))
+ return or;
- /* a Rot Left */
- n = new_r_Rot(current_ir_graph, block, x, v, mode);
+ if (get_tarval_long(tv1) != (int) get_mode_size_bits(mode))
+ return or;
- DBG_OPT_ALGSIM0(or, n, FS_OPT_OR_SHFT_TO_ROT);
- return n;
- }
+ /* yet, condition met */
+ block = get_nodes_block(or);
+
+ n = new_r_Rotl(current_ir_graph, block, x, rotval, mode);
- return or;
-} /* transform_node_Or_Rot */
+ DBG_OPT_ALGSIM0(or, n, FS_OPT_OR_SHFT_TO_ROTL);
+ return n;
+} /* transform_node_Or_Rotl */
/**
* Transform an Or.
HANDLE_BINOP_PHI(tarval_or, a, b, c, mode);
n = transform_node_Or_bf_store(n);
- n = transform_node_Or_Rot(n);
+ n = transform_node_Or_Rotl(n);
if (n != oldn)
return n;
static ir_node *transform_node(ir_node *n);
/**
- * Optimize (a >> c1) >> c2), works for Shr, Shrs, Shl, Rot.
+ * Optimize (a >> c1) >> c2), works for Shr, Shrs, Shl, Rotl.
*
* Should be moved to reassociation?
*/
static ir_node *transform_node_shift(ir_node *n) {
ir_node *left, *right;
- tarval *tv1, *tv2, *res;
ir_mode *mode;
- int modulo_shf, flag;
+ tarval *tv1, *tv2, *res;
+ ir_node *in[2], *irn, *block;
left = get_binop_left(n);
if (tv2 == tarval_bad)
return n;
- res = tarval_add(tv1, tv2);
+ res = tarval_add(tv1, tv2);
+ mode = get_irn_mode(n);
/* beware: a simple replacement works only, if res < modulo shift */
+ if (!is_Rotl(n)) {
+ int modulo_shf = get_mode_modulo_shift(mode);
+ assert(modulo_shf >= (int) get_mode_size_bits(mode));
+ if (modulo_shf > 0) {
+ tarval *modulo = new_tarval_from_long(modulo_shf,
+ get_tarval_mode(res));
+
+ /* shifting too much */
+ if (!(tarval_cmp(res, modulo) & pn_Cmp_Lt)) {
+ if (is_Shrs(n)) {
+ ir_graph *irg = get_irn_irg(n);
+ ir_node *block = get_nodes_block(n);
+ dbg_info *dbgi = get_irn_dbg_info(n);
+ ir_node *cnst = new_Const(mode_Iu, new_tarval_from_long(get_mode_size_bits(mode)-1, mode_Iu));
+ return new_rd_Shrs(dbgi, irg, block, get_binop_left(left),
+ cnst, mode);
+ }
+
+ return new_Const(mode, get_mode_null(mode));
+ }
+ }
+ } else {
+ res = tarval_mod(res, new_tarval_from_long(get_mode_size_bits(mode), get_tarval_mode(res)));
+ }
+
+ /* ok, we can replace it */
+ block = get_nodes_block(n);
+
+ in[0] = get_binop_left(left);
+ in[1] = new_r_Const(current_ir_graph, block, get_tarval_mode(res), res);
+
+ irn = new_ir_node(NULL, current_ir_graph, block, get_irn_op(n), mode, 2, in);
+
+ DBG_OPT_ALGSIM0(n, irn, FS_OPT_REASSOC_SHIFT);
+
+ return transform_node(irn);
+} /* transform_node_shift */
+
+/**
+ * normalisation: (x & c1) >> c2 to (x >> c2) & (c1 >> c2)
+ * (we can use:
+ * - and, or, xor instead of &
+ * - Shl, Shr, Shrs, rotl instead of >>
+ * (with a special case for Or/Xor + Shrs)
+ */
+static ir_node *transform_node_bitop_shift(ir_node *n) {
+ ir_node *left;
+ ir_node *right = get_binop_right(n);
+ ir_mode *mode = get_irn_mode(n);
+ ir_node *bitop_left;
+ ir_node *bitop_right;
+ ir_op *op_left;
+ ir_graph *irg;
+ ir_node *block;
+ dbg_info *dbgi;
+ ir_node *new_shift;
+ ir_node *new_bitop;
+ ir_node *new_const;
+ tarval *tv1;
+ tarval *tv2;
+ tarval *tv_shift;
+
+ assert(is_Shrs(n) || is_Shr(n) || is_Shl(n) || is_Rotl(n));
+
+ if (!is_Const(right))
+ return n;
+
+ left = get_binop_left(n);
+ op_left = get_irn_op(left);
+ if (op_left != op_And && op_left != op_Or && op_left != op_Eor)
+ return n;
+
+ /* doing it with Shrs is not legal if the Or/Eor affects the topmost bit */
+ if (is_Shrs(n) && (op_left == op_Or || op_left == op_Eor)) {
+ /* TODO: test if sign bit is affectes */
+ return n;
+ }
+
+ bitop_right = get_binop_right(left);
+ if (!is_Const(bitop_right))
+ return n;
+
+ bitop_left = get_binop_left(left);
+
+ irg = get_irn_irg(n);
+ block = get_nodes_block(n);
+ dbgi = get_irn_dbg_info(n);
+ tv1 = get_Const_tarval(bitop_right);
+ tv2 = get_Const_tarval(right);
+
+ assert(get_tarval_mode(tv1) == mode);
+
+ if (is_Shl(n)) {
+ new_shift = new_rd_Shl(dbgi, irg, block, bitop_left, right, mode);
+ tv_shift = tarval_shl(tv1, tv2);
+ } else if(is_Shr(n)) {
+ new_shift = new_rd_Shr(dbgi, irg, block, bitop_left, right, mode);
+ tv_shift = tarval_shr(tv1, tv2);
+ } else if(is_Shrs(n)) {
+ new_shift = new_rd_Shrs(dbgi, irg, block, bitop_left, right, mode);
+ tv_shift = tarval_shrs(tv1, tv2);
+ } else {
+ assert(is_Rotl(n));
+ new_shift = new_rd_Rotl(dbgi, irg, block, bitop_left, right, mode);
+ tv_shift = tarval_rotl(tv1, tv2);
+ }
+
+ assert(get_tarval_mode(tv_shift) == mode);
+ new_const = new_Const(mode, tv_shift);
+
+ if (op_left == op_And) {
+ new_bitop = new_rd_And(dbgi, irg, block, new_shift, new_const, mode);
+ } else if(op_left == op_Or) {
+ new_bitop = new_rd_Or(dbgi, irg, block, new_shift, new_const, mode);
+ } else {
+ assert(op_left == op_Eor);
+ new_bitop = new_rd_Eor(dbgi, irg, block, new_shift, new_const, mode);
+ }
+
+ return new_bitop;
+}
+
+/**
+ * normalisation:
+ * (x << c1) >> c2 <=> x OP (c2-c1) & ((-1 << c1) >> c2)
+ * also:
+ * (x >> c1) << c2 <=> x OP (c2-c1) & ((-1 >> c1) << c2)
+ * (also with x >>s c1 when c1>=c2)
+ */
+static ir_node *transform_node_shl_shr(ir_node *n) {
+ ir_node *left;
+ ir_node *right = get_binop_right(n);
+ ir_node *x;
+ ir_graph *irg;
+ ir_node *block;
+ ir_mode *mode;
+ dbg_info *dbgi;
+ ir_node *new_const;
+ ir_node *new_shift;
+ ir_node *new_and;
+ tarval *tv_shl;
+ tarval *tv_shr;
+ tarval *tv_shift;
+ tarval *tv_mask;
+ pn_Cmp pnc;
+ int need_shrs = 0;
+
+ assert(is_Shl(n) || is_Shr(n) || is_Shrs(n));
+
+ if (!is_Const(right))
+ return n;
+
+ left = get_binop_left(n);
mode = get_irn_mode(n);
+ if (is_Shl(n) && (is_Shr(left) || is_Shrs(left))) {
+ ir_node *shr_right = get_binop_right(left);
- flag = 0;
+ if (!is_Const(shr_right))
+ return n;
- modulo_shf = get_mode_modulo_shift(mode);
- if (modulo_shf > 0) {
- tarval *modulo = new_tarval_from_long(modulo_shf, get_tarval_mode(res));
+ x = get_binop_left(left);
+ tv_shr = get_Const_tarval(shr_right);
+ tv_shl = get_Const_tarval(right);
- if (tarval_cmp(res, modulo) & pn_Cmp_Lt)
- flag = 1;
- } else
- flag = 1;
+ if (is_Shrs(left)) {
+ /* shrs variant only allowed if c1 >= c2 */
+ if (! (tarval_cmp(tv_shl, tv_shr) & pn_Cmp_Ge))
+ return n;
+
+ tv_mask = tarval_shrs(get_mode_all_one(mode), tv_shr);
+ need_shrs = 1;
+ } else {
+ tv_mask = tarval_shr(get_mode_all_one(mode), tv_shr);
+ }
+ tv_mask = tarval_shl(tv_mask, tv_shl);
+ } else if(is_Shr(n) && is_Shl(left)) {
+ ir_node *shl_right = get_Shl_right(left);
- if (flag) {
- /* ok, we can replace it */
- ir_node *in[2], *irn, *block = get_irn_n(n, -1);
+ if (!is_Const(shl_right))
+ return n;
- in[0] = get_binop_left(left);
- in[1] = new_r_Const(current_ir_graph, block, get_tarval_mode(res), res);
+ x = get_Shl_left(left);
+ tv_shr = get_Const_tarval(right);
+ tv_shl = get_Const_tarval(shl_right);
- irn = new_ir_node(NULL, current_ir_graph, block, get_irn_op(n), mode, 2, in);
+ tv_mask = tarval_shl(get_mode_all_one(mode), tv_shl);
+ tv_mask = tarval_shr(tv_mask, tv_shr);
+ } else {
+ return n;
+ }
- DBG_OPT_ALGSIM0(n, irn, FS_OPT_REASSOC_SHIFT);
+ assert(get_tarval_mode(tv_shl) == get_tarval_mode(tv_shr));
+ assert(tv_mask != tarval_bad);
+ assert(get_tarval_mode(tv_mask) == mode);
- return transform_node(irn);
+ irg = get_irn_irg(n);
+ block = get_nodes_block(n);
+ dbgi = get_irn_dbg_info(n);
+
+ pnc = tarval_cmp(tv_shl, tv_shr);
+ if (pnc == pn_Cmp_Lt || pnc == pn_Cmp_Eq) {
+ tv_shift = tarval_sub(tv_shr, tv_shl, NULL);
+ new_const = new_Const(get_tarval_mode(tv_shift), tv_shift);
+ if (need_shrs) {
+ new_shift = new_rd_Shrs(dbgi, irg, block, x, new_const, mode);
+ } else {
+ new_shift = new_rd_Shr(dbgi, irg, block, x, new_const, mode);
+ }
+ } else {
+ assert(pnc == pn_Cmp_Gt);
+ tv_shift = tarval_sub(tv_shl, tv_shr, NULL);
+ new_const = new_Const(get_tarval_mode(tv_shift), tv_shift);
+ new_shift = new_rd_Shl(dbgi, irg, block, x, new_const, mode);
}
- return n;
-} /* transform_node_shift */
+
+ new_const = new_Const(mode, tv_mask);
+ new_and = new_rd_And(dbgi, irg, block, new_shift, new_const, mode);
+
+ return new_and;
+}
/**
* Transform a Shr.
*/
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_mode *mode = get_irn_mode(n);
+ ir_node *left = get_Shr_left(n);
+ ir_node *right = get_Shr_right(n);
+ ir_mode *mode = get_irn_mode(n);
- HANDLE_BINOP_PHI(tarval_shr, a, b, c, mode);
- return transform_node_shift(n);
+ HANDLE_BINOP_PHI(tarval_shr, left, right, c, mode);
+ n = transform_node_shift(n);
+
+ if (is_Shr(n))
+ n = transform_node_shl_shr(n);
+ if (is_Shr(n))
+ n = transform_node_bitop_shift(n);
+
+ return n;
} /* transform_node_Shr */
/**
ir_mode *mode = get_irn_mode(n);
HANDLE_BINOP_PHI(tarval_shrs, a, b, c, mode);
- return transform_node_shift(n);
+ n = transform_node_shift(n);
+
+ if (is_Shrs(n))
+ n = transform_node_bitop_shift(n);
+
+ return n;
} /* transform_node_Shrs */
/**
ir_mode *mode = get_irn_mode(n);
HANDLE_BINOP_PHI(tarval_shl, a, b, c, mode);
- return transform_node_shift(n);
+ n = transform_node_shift(n);
+
+ if (is_Shl(n))
+ n = transform_node_shl_shr(n);
+ if (is_Shl(n))
+ n = transform_node_bitop_shift(n);
+
+ return n;
} /* transform_node_Shl */
/**
- * Transform a Rot.
+ * Transform a Rotl.
*/
-static ir_node *transform_node_Rot(ir_node *n) {
+static ir_node *transform_node_Rotl(ir_node *n) {
ir_node *c, *oldn = n;
- ir_node *a = get_Rot_left(n);
- ir_node *b = get_Rot_right(n);
+ ir_node *a = get_Rotl_left(n);
+ ir_node *b = get_Rotl_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 */
+ HANDLE_BINOP_PHI(tarval_rotl, a, b, c, mode);
+ n = transform_node_shift(n);
+
+ if (is_Rotl(n))
+ n = transform_node_bitop_shift(n);
+
+ return n;
+} /* transform_node_Rotl */
/**
* Transform a Conv.
static ir_node *transform_node_Mux(ir_node *n) {
ir_node *oldn = n, *sel = get_Mux_sel(n);
ir_mode *mode = get_irn_mode(n);
+ ir_node *t = get_Mux_true(n);
+ ir_node *f = get_Mux_false(n);
+ ir_graph *irg = current_ir_graph;
+ ir_node *conds[1], *vals[2];
+
+ /* first normalization step: move a possible zero to the false case */
+ if (is_Proj(sel)) {
+ ir_node *cmp = get_Proj_pred(sel);
+
+ if (is_Cmp(cmp)) {
+ if (is_Const(t) && is_Const_null(t)) {
+ /* Psi(x, 0, y) => Psi(x, y, 0) */
+ pn_Cmp pnc = get_Proj_proj(sel);
+ sel = new_r_Proj(irg, get_nodes_block(cmp), cmp, mode_b,
+ get_negated_pnc(pnc, get_irn_mode(get_Cmp_left(cmp))));
+ conds[0] = sel;
+ vals[0] = f;
+ vals[1] = t;
+ n = new_rd_Psi(get_irn_dbg_info(n), irg, get_nodes_block(n), 1, conds, vals, mode);
+ t = vals[0];
+ f = vals[1];
+ }
+ }
+ }
+ /* note: after normalization, false can only happen on default */
if (mode == mode_b) {
- ir_node *t = get_Mux_true(n);
- ir_node *f = get_Mux_false(n);
dbg_info *dbg = get_irn_dbg_info(n);
- ir_node *block = get_irn_n(n, -1);
+ ir_node *block = get_nodes_block(n);
ir_graph *irg = current_ir_graph;
if (is_Const(t)) {
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 {
- /* 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 (is_Proj(sel) && !mode_honor_signed_zeros(mode)) {
+ /* more normalization: try to normalize Mux(x, C1, C2) into Mux(x, +1/-1, 0) op C2 */
+ if (is_Const(t) && is_Const(f) && mode_is_int(mode)) {
+ tarval *a = get_Const_tarval(t);
+ tarval *b = get_Const_tarval(f);
+ tarval *null = get_tarval_null(mode);
+ tarval *diff, *min;
+
+ if (tarval_cmp(a, b) & pn_Cmp_Gt) {
+ diff = tarval_sub(a, b, NULL);
+ min = b;
+ } else {
+ diff = tarval_sub(b, a, NULL);
+ min = a;
+ }
+
+ if (diff == get_tarval_one(mode) && min != null) {
+ dbg_info *dbg = get_irn_dbg_info(n);
+ ir_node *block = get_nodes_block(n);
+ ir_graph *irg = current_ir_graph;
+
+
+ conds[0] = sel;
+ vals[0] = new_Const(mode, tarval_sub(a, min, NULL));
+ vals[1] = new_Const(mode, tarval_sub(b, min, NULL));
+ n = new_rd_Psi(dbg, irg, block, 1, conds, vals, mode);
+ n = new_rd_Add(dbg, irg, block, n, new_Const(mode, min), mode);
+ return n;
+ }
+ }
+
+ if (is_Proj(sel)) {
ir_node *cmp = get_Proj_pred(sel);
long pn = get_Proj_proj(sel);
- ir_node *f = get_Mux_false(n);
- ir_node *t = get_Mux_true(n);
/*
* Note: normalization puts the constant on the right side,
*
* 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);
return n;
}
}
+
+ if (mode_is_int(mode)) {
+ /* integer only */
+ if ((pn == pn_Cmp_Lg || pn == pn_Cmp_Eq) && 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))) {
+ if (pn == pn_Cmp_Lg) {
+ /* Psi((a & 2^C) != 0, 2^C, 0) */
+ n = cmp_l;
+ } else {
+ /* Psi((a & 2^C) == 0, 2^C, 0) */
+ n = new_rd_Eor(get_irn_dbg_info(n), current_ir_graph,
+ block, cmp_l, t, 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) {
+ if (pn == pn_Cmp_Lg) {
+ /* (a & (1 << n)) != 0, (1 << n), 0) */
+ n = cmp_l;
+ } else {
+ /* (a & (1 << n)) == 0, (1 << n), 0) */
+ n = new_rd_Eor(get_irn_dbg_info(n), current_ir_graph,
+ block, cmp_l, t, 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) {
+ if (pn == pn_Cmp_Lg) {
+ /* ((1 << n) & a) != 0, (1 << n), 0) */
+ n = cmp_l;
+ } else {
+ /* ((1 << n) & a) == 0, (1 << n), 0) */
+ n = new_rd_Eor(get_irn_dbg_info(n), current_ir_graph,
+ block, cmp_l, t, mode);
+ }
+ return n;
+ }
+ }
+ }
+ }
+ }
}
}
}
CASE(Quot);
CASE(Abs);
CASE(Cond);
+ CASE(Cmp);
CASE(And);
CASE(Or);
CASE(Eor);
CASE(Shr);
CASE(Shrs);
CASE(Shl);
- CASE(Rot);
+ CASE(Rotl);
CASE(Conv);
CASE(End);
CASE(Mux);
/*
* Calculate a hash value of a node.
+ *
+ * @param node The IR-node
*/
-unsigned ir_node_hash(ir_node *node) {
- unsigned h;
- int i, irn_arity;
-
- if (node->op == op_Const) {
- /* special value for const, as they only differ in their tarval. */
- h = HASH_PTR(node->attr.con.tv);
- h = 9*h + HASH_PTR(get_irn_mode(node));
- } else if (node->op == op_SymConst) {
- /* special value for const, as they only differ in their symbol. */
- h = HASH_PTR(node->attr.symc.sym.type_p);
- h = 9*h + HASH_PTR(get_irn_mode(node));
- } else {
-
- /* hash table value = 9*(9*(9*(9*(9*arity+in[0])+in[1])+ ...)+mode)+code */
- h = irn_arity = get_irn_intra_arity(node);
-
- /* consider all in nodes... except the block if not a control flow. */
- for (i = is_cfop(node) ? -1 : 0; i < irn_arity; i++) {
- h = 9*h + HASH_PTR(get_irn_intra_n(node, i));
- }
-
- /* ...mode,... */
- h = 9*h + HASH_PTR(get_irn_mode(node));
- /* ...and code */
- h = 9*h + HASH_PTR(get_irn_op(node));
- }
-
- return h;
+unsigned ir_node_hash(const ir_node *node) {
+ return node->op->ops.hash(node);
} /* ir_node_hash */
+
pset *new_identities(void) {
return new_pset(identities_cmp, N_IR_NODES);
} /* new_identities */
}
} /* update_value_table */
-/**
- * Return the canonical node computing the same value as n.
- *
- * @param value_table The value table
- * @param n The node to lookup
- *
- * Looks up the node in a hash table.
- *
- * For Const nodes this is performed in the constructor, too. Const
- * nodes are extremely time critical because of their frequent use in
- * constant string arrays.
- */
-static INLINE ir_node *identify(pset *value_table, ir_node *n) {
- ir_node *o = NULL;
-
- if (!value_table) return n;
-
- normalize_node(n);
-
- o = pset_find(value_table, n, ir_node_hash(n));
- if (o == NULL)
- return n;
-
- update_known_irn(o, n);
- DBG_OPT_CSE(n, o);
-
- return o;
-} /* identify */
-
-/**
- * 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 (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
return o;
} /* identify_remember */
+/**
+ * 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_remember(value_table, n);
+ 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 */
+
/* Add a node to the identities value table. */
void add_identities(pset *value_table, ir_node *node) {
if (get_opt_cse() && is_no_Block(node))
}
/* remove unnecessary nodes */
- if (get_opt_constant_folding() ||
+ if (get_opt_algebraic_simplification() ||
(iro == iro_Phi) || /* always optimize these nodes. */
(iro == iro_Id) ||
(iro == iro_Proj) ||
/* Some more constant expression evaluation that does not allow to
free the node. */
iro = get_irn_opcode(n);
- if (get_opt_constant_folding() ||
+ if (get_opt_algebraic_simplification() ||
(iro == iro_Cond) ||
(iro == iro_Proj)) /* Flags tested local. */
n = transform_node(n);
/* Remove nodes with dead (Bad) input.
Run always for transformation induced Bads. */
- n = gigo (n);
+ n = gigo(n);
/* Now we have a legal, useful node. Enter it in hash table for CSE */
if (get_opt_cse() && (get_irn_opcode(n) != iro_Block)) {
now all nodes are op_pin_state_pinned to blocks, i.e., the cse only finds common
subexpressions within a block. */
if (get_opt_cse()) {
- n = identify(current_ir_graph->value_table, n);
+ n = identify_remember(current_ir_graph->value_table, n);
}
/* Some more constant expression evaluation. */
return optimize_in_place_2(n);
} /* optimize_in_place */
+/**
+ * Calculate a hash value of a Const node.
+ */
+static unsigned hash_Const(const ir_node *node) {
+ unsigned h;
+
+ /* special value for const, as they only differ in their tarval. */
+ h = HASH_PTR(node->attr.con.tv);
+ h = 9*h + HASH_PTR(get_irn_mode(node));
+
+ return h;
+} /* hash_Const */
+
+/**
+ * Calculate a hash value of a SymConst node.
+ */
+static unsigned hash_SymConst(const ir_node *node) {
+ unsigned h;
+
+ /* special value for const, as they only differ in their symbol. */
+ h = HASH_PTR(node->attr.symc.sym.type_p);
+ h = 9*h + HASH_PTR(get_irn_mode(node));
+
+ return h;
+} /* hash_SymConst */
+
+/**
+ * Set the default hash operation in an ir_op_ops.
+ *
+ * @param code the opcode for the default operation
+ * @param ops the operations initialized
+ *
+ * @return
+ * The operations.
+ */
+static ir_op_ops *firm_set_default_hash(ir_opcode code, ir_op_ops *ops)
+{
+#define CASE(a) \
+ case iro_##a: \
+ ops->hash = hash_##a; \
+ break
+
+ /* hash function already set */
+ if (ops->hash != NULL)
+ return ops;
+
+ switch (code) {
+ CASE(Const);
+ CASE(SymConst);
+ default:
+ /* use input/mode default hash if no function was given */
+ ops->hash = firm_default_hash;
+ }
+
+ return ops;
+#undef CASE
+}
+
/*
* Sets the default operation for an ir_ops.
*/
ir_op_ops *firm_set_default_operations(ir_opcode code, ir_op_ops *ops) {
+ ops = firm_set_default_hash(code, ops);
ops = firm_set_default_computed_value(code, ops);
ops = firm_set_default_equivalent_node(code, ops);
ops = firm_set_default_transform_node(code, ops);
projects / libfirm / blobdiff