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.
*/
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:
* remove_confirm is activated.
*/
if (get_opt_remove_confirm()) {
- return get_Confirm_cmp(n) == pn_Cmp_Eq ?
- value_of(get_Confirm_bound(n)) : tarval_bad;
+ if (get_Confirm_cmp(n) == pn_Cmp_Eq) {
+ tarval *tv = value_of(get_Confirm_bound(n));
+ if (tv != tarval_bad)
+ return tv;
+ }
}
- return tarval_bad;
+ 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);
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);
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.
*/
}
}
}
+ 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))
} /* 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;
+ n = pred;
+ pred = get_Confirm_value(n);
+ pnc = get_Confirm_cmp(n);
}
if (get_opt_remove_confirm())
return get_Confirm_value(n);
return 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());
- }
- 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
* perform no actual computation, as, e.g., the Id nodes. It does not create
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_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.
/* 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;
pnc = tarval_cmp(tv_shl, tv_shr);
if (pnc == pn_Cmp_Lt || pnc == pn_Cmp_Eq) {
- tv_shift = tarval_sub(tv_shr, tv_shl);
+ 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 {
assert(pnc == pn_Cmp_Gt);
- tv_shift = tarval_sub(tv_shl, tv_shr);
+ 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);
}
tarval *diff, *min;
if (tarval_cmp(a, b) & pn_Cmp_Gt) {
- diff = tarval_sub(a, b);
+ diff = tarval_sub(a, b, NULL);
min = b;
} else {
- diff = tarval_sub(b, a);
+ diff = tarval_sub(b, a, NULL);
min = a;
}
conds[0] = sel;
- vals[0] = new_Const(mode, tarval_sub(a, min));
- vals[1] = new_Const(mode, tarval_sub(b, min));
+ 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;
CASE(Quot);
CASE(Abs);
CASE(Cond);
+ CASE(Cmp);
CASE(And);
CASE(Or);
CASE(Eor);
/*
* Calculate a hash value of a node.
+ *
+ * @param node The IR-node
*/
unsigned ir_node_hash(const 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;
+ return node->op->ops.hash(node);
} /* ir_node_hash */
+
pset *new_identities(void) {
return new_pset(identities_cmp, N_IR_NODES);
} /* new_identities */
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