# include "irgraph_t.h"
# include "irmode_t.h"
# include "iropt_t.h"
-# include "ircons.h"
+# include "ircons_t.h"
# include "irgmod.h"
# include "irvrfy.h"
-# include "tv.h"
+# include "tv_t.h"
# include "dbginfo_t.h"
# include "iropt_dbg.h"
# include "irflag_t.h"
return tarval_bad;
}
+/**
+ * return the value of a Constant
+ */
static tarval *computed_value_Const(ir_node *n)
{
return get_Const_tarval(n);
}
+/**
+ * return the value of a 'sizeof' SymConst
+ */
static tarval *computed_value_SymConst(ir_node *n)
{
- if ((get_SymConst_kind(n) == size) &&
+ if ((get_SymConst_kind(n) == symconst_size) &&
(get_type_state(get_SymConst_type(n))) == layout_fixed)
- return new_tarval_from_long (get_type_size(get_SymConst_type(n)), mode_Is);
+ return new_tarval_from_long(get_type_size_bytes(get_SymConst_type(n)), get_irn_mode(n));
return tarval_bad;
}
} else {
tarval *v;
- if ( (tarval_classify ((v = computed_value (a))) == TV_CLASSIFY_NULL)
- || (tarval_classify ((v = computed_value (b))) == TV_CLASSIFY_NULL)) {
+ if ( (classify_tarval ((v = computed_value (a))) == TV_CLASSIFY_NULL)
+ || (classify_tarval ((v = computed_value (b))) == TV_CLASSIFY_NULL)) {
return v;
}
}
return tarval_or (ta, tb);
} else {
tarval *v;
- if ( (tarval_classify ((v = computed_value (a))) == TV_CLASSIFY_ALL_ONE)
- || (tarval_classify ((v = computed_value (b))) == TV_CLASSIFY_ALL_ONE)) {
+ if ( (classify_tarval ((v = computed_value (a))) == TV_CLASSIFY_ALL_ONE)
+ || (classify_tarval ((v = computed_value (b))) == TV_CLASSIFY_ALL_ONE)) {
return v;
}
}
tarval *tb = value_of(b);
if ((ta != tarval_bad) && (tb != tarval_bad)) {
- /* return tarval_rot (ta, tb); */
+ return tarval_rot (ta, tb);
}
return tarval_bad;
}
3. The predecessors are Allocs or void* constants. Allocs never
return NULL, they raise an exception. Therefore we can predict
the Cmp result. */
- if (get_irn_op(a) == op_Cmp) {
+ switch (get_irn_opcode(a)) {
+ case iro_Cmp:
aa = get_Cmp_left(a);
ab = get_Cmp_right(a);
if (aa == ab) { /* 1.: */
- /* This is a tric with the bits used for encoding the Cmp
+ /* This is a trick with the bits used for encoding the Cmp
Proj numbers, the following statement is not the same:
return new_tarval_from_long ((get_Proj_proj(n) == Eq), mode_b) */
return new_tarval_from_long ((get_Proj_proj(n) & Eq), mode_b);
return new_tarval_from_long (get_Proj_proj(n) & flags, mode_b);
}
} else { /* check for 3.: */
- ir_node *aaa = skip_nop(skip_Proj(aa));
- ir_node *aba = skip_nop(skip_Proj(ab));
+ ir_node *aaa = skip_Id(skip_Proj(aa));
+ ir_node *aba = skip_Id(skip_Proj(ab));
if ( ( (/* aa is ProjP and aaa is Alloc */
(get_irn_op(aa) == op_Proj)
return new_tarval_from_long (get_Proj_proj(n) & Ne, mode_b);
}
}
- } else if (get_irn_op(a) == op_DivMod) {
+ break;
+
+ case iro_DivMod:
+ {
tarval *tb = value_of(b = get_DivMod_right(a));
tarval *ta = value_of(a = get_DivMod_left(a));
if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
if (tb == get_mode_null(get_tarval_mode(tb))) /* div by zero: return tarval_bad */
return tarval_bad;
- if (get_Proj_proj(n)== 0) /* Div */
+ if (get_Proj_proj(n)== pn_DivMod_res_div)
return tarval_div(ta, tb);
- else /* Mod */
+ else if (get_Proj_proj(n)== pn_DivMod_res_mod)
return tarval_mod(ta, tb);
}
+ break;
+ }
+
+ case iro_Div:
+ {
+ tarval *tb = value_of(b = get_Div_right(a));
+ tarval *ta = value_of(a = get_Div_left(a));
+
+ if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
+ if (tb == get_mode_null(get_tarval_mode(tb))) /* div by zero: return tarval_bad */
+ return tarval_bad;
+ if (get_Proj_proj(n)== pn_Div_res)
+ return tarval_div(ta, tb);
+ }
+ break;
+ }
+
+ case iro_Mod:
+ {
+ tarval *tb = value_of(b = get_Mod_right(a));
+ tarval *ta = value_of(a = get_Mod_left(a));
+
+ if ((ta != tarval_bad) && (tb != tarval_bad) && (get_irn_mode(a) == get_irn_mode(b))) {
+ if (tb == get_mode_null(get_tarval_mode(tb))) /* div by zero: return tarval_bad */
+ return tarval_bad;
+ if (get_Proj_proj(n)== pn_Mod_res)
+ return tarval_mod(ta, tb);
+ }
+ break;
+ }
+
+ default:
+ return tarval_bad;
}
return tarval_bad;
}
* If the parameter n can be computed, return its value, else tarval_bad.
* Performs constant folding.
*
- * GL: Only if n is arithmetic operator?
+ * @param n The node this should be evaluated
*/
tarval *computed_value(ir_node *n)
{
{
ir_node *oldn = n;
- /* The Block constructor does not call optimize, but mature_block
+ /* The Block constructor does not call optimize, but mature_immBlock
calls the optimization. */
assert(get_Block_matured(n));
This should be true, as the block is matured before optimize is called.
But what about Phi-cycles with the Phi0/Id that could not be resolved?
Remaining Phi nodes are just Ids. */
- if ((get_Block_n_cfgpreds(n) == 1) &&
- (get_irn_op(get_Block_cfgpred(n, 0)) == op_Jmp) &&
- (get_opt_control_flow_straightening())) {
- n = get_nodes_Block(get_Block_cfgpred(n, 0));
- if (n == oldn) {
- /* Jmp jumps into the block it is in -- deal self cycle. */
- n = new_Bad();
- } else {
- DBG_OPT_STG;
- }
-
- } else if ((get_Block_n_cfgpreds(n) == 2) &&
- (get_opt_control_flow_weak_simplification())) {
+ if ((get_Block_n_cfgpreds(n) == 1) &&
+ (get_irn_op(get_Block_cfgpred(n, 0)) == op_Jmp)) {
+ ir_node *predblock = get_nodes_block(get_Block_cfgpred(n, 0));
+ if (predblock == oldn) {
+ /* Jmp jumps into the block it is in -- deal self cycle. */
+ n = new_Bad(); DBG_OPT_DEAD;
+ } else if (get_opt_control_flow_straightening()) {
+ n = predblock; DBG_OPT_STG;
+ }
+ }
+ else if ((get_Block_n_cfgpreds(n) == 1) &&
+ (get_irn_op(skip_Proj(get_Block_cfgpred(n, 0))) == op_Cond)) {
+ ir_node *predblock = get_nodes_block(get_Block_cfgpred(n, 0));
+ if (predblock == oldn) {
+ /* Jmp jumps into the block it is in -- deal self cycle. */
+ n = new_Bad(); DBG_OPT_DEAD;
+ }
+ }
+ else if ((get_Block_n_cfgpreds(n) == 2) &&
+ (get_opt_control_flow_weak_simplification())) {
/* Test whether Cond jumps twice to this block
@@@ we could do this also with two loops finding two preds from several ones. */
ir_node *a = get_Block_cfgpred(n, 0);
(get_irn_mode(get_Cond_selector(get_Proj_pred(a))) == mode_b)) {
/* Also a single entry Block following a single exit Block. Phis have
twice the same operand and will be optimized away. */
- n = get_nodes_Block(a); DBG_OPT_IFSIM;
+ n = get_nodes_block(a); DBG_OPT_IFSIM;
}
} else if (get_opt_unreachable_code() &&
(n != current_ir_graph->start_block) &&
return n;
}
+/**
+ * Returns a equivalent node for a Jmp, a Bad :-)
+ * Of course this only happens if the Block of the Jmp is Bad.
+ */
static ir_node *equivalent_node_Jmp(ir_node *n)
{
/* GL: Why not same for op_Raise?? */
/* unreachable code elimination */
- if (is_Bad(get_nodes_Block(n)))
+ if (is_Bad(get_nodes_block(n)))
n = new_Bad();
return n;
return n;
}
+/**
+ * Use algebraic simplification a v a = a.
+ */
static ir_node *equivalent_node_Or(ir_node *n)
{
ir_node *oldn = n;
}
/**
- * optimize operations that are commutative and have neutral 0.
+ * optimize operations that are commutative and have neutral 0,
+ * so a op 0 = 0 op a = a.
*/
static ir_node *equivalent_node_neutral_zero(ir_node *n)
{
/* After running compute_node there is only one constant predecessor.
Find this predecessors value and remember the other node: */
- if ((tv = computed_value (a)) != tarval_bad) {
+ if ((tv = computed_value(a)) != tarval_bad) {
on = b;
- } else if ((tv = computed_value (b)) != tarval_bad) {
+ } else if ((tv = computed_value(b)) != tarval_bad) {
on = a;
} else
return n;
/* If this predecessors constant value is zero, the operation is
unnecessary. Remove it: */
- if (tarval_classify (tv) == TV_CLASSIFY_NULL) {
+ if (classify_tarval (tv) == TV_CLASSIFY_NULL) {
n = on; DBG_OPT_ALGSIM1;
}
return n;
}
-static ir_node *equivalent_node_Add(ir_node *n)
-{
- return equivalent_node_neutral_zero(n);
-}
-
-static ir_node *equivalent_node_Eor(ir_node *n)
-{
- return equivalent_node_neutral_zero(n);
-}
+#define equivalent_node_Add equivalent_node_neutral_zero
+#define equivalent_node_Eor equivalent_node_neutral_zero
/**
- * optimize operations that are not commutative but have neutral 0 on left.
- * Test only one predecessor.
+ * optimize operations that are not commutative but have neutral 0 on left,
+ * so a op 0 = a.
*/
static ir_node *equivalent_node_left_zero(ir_node *n)
{
ir_node *a = get_binop_left(n);
ir_node *b = get_binop_right(n);
- if (tarval_classify (computed_value (b)) == TV_CLASSIFY_NULL) {
+ if (classify_tarval(computed_value(b)) == TV_CLASSIFY_NULL) {
n = a; DBG_OPT_ALGSIM1;
}
return n;
}
-static ir_node *equivalent_node_Sub(ir_node *n)
-{
- return equivalent_node_left_zero(n);
-}
-
-static ir_node *equivalent_node_Shl(ir_node *n)
-{
- return equivalent_node_left_zero(n);
-}
-
-static ir_node *equivalent_node_Shr(ir_node *n)
-{
- return equivalent_node_left_zero(n);
-}
-
-static ir_node *equivalent_node_Shrs(ir_node *n)
-{
- return equivalent_node_left_zero(n);
-}
-
-static ir_node *equivalent_node_Rot(ir_node *n)
-{
- return equivalent_node_left_zero(n);
-}
+#define equivalent_node_Sub equivalent_node_left_zero
+#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
+/**
+ * Er, a "symmetic unop", ie op(op(n)) = n.
+ */
static ir_node *equivalent_node_symmetric_unop(ir_node *n)
{
ir_node *oldn = n;
return n;
}
-static ir_node *equivalent_node_Not(ir_node *n)
-{
- /* NotNot x == x */
- return equivalent_node_symmetric_unop(n);
-}
+/* NotNot x == x */
+#define equivalent_node_Not equivalent_node_symmetric_unop
-static ir_node *equivalent_node_Minus(ir_node *n)
-{
- /* --x == x */ /* ??? Is this possible or can --x raise an
- out of bounds exception if min =! max? */
- return equivalent_node_symmetric_unop(n);
-}
+/* --x == x */ /* ??? Is this possible or can --x raise an
+ out of bounds exception if min =! max? */
+#define equivalent_node_Minus equivalent_node_symmetric_unop
+/**
+ * Optimize a * 1 = 1 * a = a.
+ */
static ir_node *equivalent_node_Mul(ir_node *n)
{
ir_node *oldn = n;
ir_node *b = get_Mul_right(n);
/* Mul is commutative and has again an other neutral element. */
- if (tarval_classify (computed_value (a)) == TV_CLASSIFY_ONE) {
+ if (classify_tarval (computed_value (a)) == TV_CLASSIFY_ONE) {
n = b; DBG_OPT_ALGSIM1;
- } else if (tarval_classify (computed_value (b)) == TV_CLASSIFY_ONE) {
+ } else if (classify_tarval (computed_value (b)) == TV_CLASSIFY_ONE) {
n = a; DBG_OPT_ALGSIM1;
}
return n;
}
+/**
+ * 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 (tarval_classify (computed_value (b)) == TV_CLASSIFY_ONE) { /* div(x, 1) == x */
+ if (classify_tarval(computed_value(b)) == TV_CLASSIFY_ONE) { /* div(x, 1) == x */
/* Turn Div into a tuple (mem, bad, a) */
ir_node *mem = get_Div_mem(n);
turn_into_tuple(n, 3);
return n;
}
+/**
+ * Optimize a & 0b1...1 = 0b1...1 & a = a & a = a.
+ */
static ir_node *equivalent_node_And(ir_node *n)
{
ir_node *oldn = n;
if (a == b) {
n = a; /* And has it's own neutral element */
- } else if (tarval_classify (computed_value (a)) == TV_CLASSIFY_ALL_ONE) {
+ } else if (classify_tarval(computed_value(a)) == TV_CLASSIFY_ALL_ONE) {
n = b;
- } else if (tarval_classify (computed_value (b)) == TV_CLASSIFY_ALL_ONE) {
+ } else if (classify_tarval(computed_value(b)) == TV_CLASSIFY_ALL_ONE) {
n = a;
}
if (n != oldn) DBG_OPT_ALGSIM1;
return n;
}
+/**
+ * Try to remove useless conv's:
+ */
static ir_node *equivalent_node_Conv(ir_node *n)
{
ir_node *oldn = n;
n_preds = get_Phi_n_preds(n);
- block = get_nodes_Block(n);
+ block = get_nodes_block(n);
/* @@@ fliegt 'raus, sollte aber doch immer wahr sein!!!
assert(get_irn_arity(block) == n_preds && "phi in wrong block!"); */
if ((is_Bad(block)) || /* Control dead */
value that is known at a certain point. This is useful for
dataflow analysis. */
if (n_preds == 2) {
- ir_node *a = follow_Id (get_Phi_pred(n, 0));
- ir_node *b = follow_Id (get_Phi_pred(n, 1));
+ ir_node *a = get_Phi_pred(n, 0);
+ ir_node *b = get_Phi_pred(n, 1);
if ( (get_irn_op(a) == op_Confirm)
&& (get_irn_op(b) == op_Confirm)
&& follow_Id (get_irn_n(a, 0) == get_irn_n(b, 0))
}
#endif
+ /* If the Block has a Bad pred, we also have one. */
+ for (i = 0; i < n_preds; ++i)
+ if (is_Bad (get_Block_cfgpred(block, i)))
+ set_Phi_pred(n, i, new_Bad());
+
/* Find first non-self-referencing input */
for (i = 0; i < n_preds; ++i) {
- first_val = follow_Id(get_Phi_pred(n, i));
- /* skip Id's */
- set_Phi_pred(n, i, first_val);
+ first_val = get_Phi_pred(n, i);
if ( (first_val != n) /* not self pointer */
- && (get_irn_op(first_val) != op_Bad) /* value not dead */
- && !(is_Bad (get_Block_cfgpred(block, i))) ) { /* not dead control flow */
- break; /* then found first value. */
+#if 1
+ && (get_irn_op(first_val) != op_Bad)
+#endif
+ ) { /* value not dead */
+ break; /* then found first value. */
}
}
/* follow_Id () for rest of inputs, determine if any of these
are non-self-referencing */
while (++i < n_preds) {
- scnd_val = follow_Id(get_Phi_pred(n, i));
- /* skip Id's */
- set_Phi_pred(n, i, scnd_val);
+ scnd_val = get_Phi_pred(n, i);
if ( (scnd_val != n)
&& (scnd_val != first_val)
+#if 1
&& (get_irn_op(scnd_val) != op_Bad)
- && !(is_Bad (get_Block_cfgpred(block, i))) ) {
+#endif
+ ) {
break;
}
}
if (i >= n_preds) {
n = first_val; DBG_OPT_PHI;
} else {
- /* skip the remaining Ids. */
- while (++i < n_preds) {
- set_Phi_pred(n, i, follow_Id(get_Phi_pred(n, i)));
- }
+ /* skip the remaining Ids (done in get_Phi_pred). */
+ /* superfluous, since we walk all to propagate Block's Bads.
+ while (++i < n_preds) get_Phi_pred(n, i); */
}
return n;
}
+/**
+ * Optimize Loads after Store.
+ *
+ * @todo FAILS for volatile entities
+ */
static ir_node *equivalent_node_Load(ir_node *n)
{
-#if 0 /* Is an illegal transformation: different nodes can
- represent the same pointer value!! */
- ir_node *a = skip_Proj(get_Load_mem(n));
- ir_node *b = get_Load_ptr(n);
-
- if (get_irn_op(a) == op_Store) {
- if ( different_identity (b, get_Store_ptr(a))) {
- /* load and store use different pointers, therefore load
- needs not take store's memory but the state before. */
- set_Load_mem (n, get_Store_mem(a));
- } else if (( 0 /* ???didn't get cryptic test that returns 0 */ )) {
- }
- }
-#endif
- return n;
+ ir_node *oldn = n;
+
+ /* remove unnecessary Load. */
+ ir_node *a = skip_Proj(get_Load_mem(n));
+ ir_node *b = get_Load_ptr(n);
+ ir_node *c;
+
+ /* TODO: check for volatile */
+ if (get_irn_op(a) == op_Store && get_Store_ptr(a) == b) {
+ /* We load immediately after a store -- a read after write. */
+ ir_node *mem = get_Load_mem(n);
+
+ c = get_Store_value(a);
+ turn_into_tuple(n, 3);
+ set_Tuple_pred(n, pn_Load_M, mem);
+ set_Tuple_pred(n, pn_Load_res, c);
+ set_Tuple_pred(n, pn_Load_X_except, new_Bad()); DBG_OPT_RAW;
+ }
+ return n;
}
+/**
+ * Optimize store after store and load atfter store.
+ *
+ * @todo FAILS for volatile entities
+ */
static ir_node *equivalent_node_Store(ir_node *n)
{
ir_node *oldn = n;
if ( get_Proj_proj(n) <= get_Tuple_n_preds(a) ) {
n = get_Tuple_pred(a, get_Proj_proj(n)); DBG_OPT_TUPLE;
} else {
- assert(0); /* This should not happen! */
- n = new_Bad();
+// assert(0); /* This should not happen! */
+// n = new_Bad();
+ dump_ir_block_graph(current_ir_graph, "-CRASH");
+ printf(">>>%d\n", get_irn_node_nr(n));
+ exit(1);
}
} else if (get_irn_mode(n) == mode_X &&
- is_Bad(get_nodes_Block(n))) {
+ is_Bad(get_nodes_block(n))) {
/* Remove dead control flow -- early gigo. */
n = new_Bad();
}
return n;
}
+/**
+ * Remove Id's.
+ */
static ir_node *equivalent_node_Id(ir_node *n)
{
ir_node *oldn = n;
- n = follow_Id (n); DBG_OPT_ID;
+ n = follow_Id(n); DBG_OPT_ID;
return n;
}
* in array fits, we transform n into a tuple (e.g., Div).
*/
ir_node *
-equivalent_node (ir_node *n)
+equivalent_node(ir_node *n)
{
if (n->op->equivalent_node)
return n->op->equivalent_node(n);
CASE(And);
CASE(Conv);
CASE(Phi);
- CASE(Load);
- CASE(Store);
+ CASE(Load); /* dangerous */
+ CASE(Store); /* dangerous, see todo */
CASE(Proj);
CASE(Id);
default:
static ir_node *transform_node_Div(ir_node *n)
{
- tarval *ta = computed_value(n);
+ tarval *tv = computed_value(n);
+
+ /* BEWARE: it is NOT possible to optimize a/a to 1, as this may cause a exception */
- if (ta != tarval_bad) {
+ if (tv != tarval_bad) {
/* Turn Div into a tuple (mem, bad, value) */
ir_node *mem = get_Div_mem(n);
turn_into_tuple(n, 3);
set_Tuple_pred(n, pn_Div_M, mem);
set_Tuple_pred(n, pn_Div_X_except, new_Bad());
- set_Tuple_pred(n, pn_Div_res, new_Const(get_tarval_mode(ta), ta));
+ set_Tuple_pred(n, pn_Div_res, new_Const(get_tarval_mode(tv), tv));
}
return n;
}
static ir_node *transform_node_Mod(ir_node *n)
{
- tarval *ta = computed_value(n);
+ tarval *tv = computed_value(n);
- if (ta != tarval_bad) {
+ /* BEWARE: it is NOT possible to optimize a%a to 0, as this may cause a exception */
+
+ if (tv != tarval_bad) {
/* Turn Mod into a tuple (mem, bad, value) */
ir_node *mem = get_Mod_mem(n);
turn_into_tuple(n, 3);
set_Tuple_pred(n, pn_Mod_M, mem);
set_Tuple_pred(n, pn_Mod_X_except, new_Bad());
- set_Tuple_pred(n, pn_Mod_res, new_Const(get_tarval_mode(ta), ta));
+ set_Tuple_pred(n, pn_Mod_res, new_Const(get_tarval_mode(tv), tv));
}
return n;
}
ir_node *a = get_DivMod_left(n);
ir_node *b = get_DivMod_right(n);
ir_mode *mode = get_irn_mode(a);
+ tarval *ta = value_of(a);
+ tarval *tb = value_of(b);
if (!(mode_is_int(mode) && mode_is_int(get_irn_mode(b))))
return n;
- if (a == b) {
- a = new_Const(mode, get_mode_one(mode));
- b = new_Const(mode, get_mode_null(mode));
- evaluated = 1;
- } else {
- tarval *ta = value_of(a);
- tarval *tb = value_of(b);
-
- if (tb != tarval_bad) {
- if (tb == get_mode_one(get_tarval_mode(tb))) {
- b = new_Const (mode, get_mode_null(mode));
- evaluated = 1;
- } else if (ta != tarval_bad) {
- tarval *resa, *resb;
- resa = tarval_div (ta, tb);
- if (resa == tarval_bad) return n; /* Causes exception!!! Model by replacing through
- Jmp for X result!? */
- resb = tarval_mod (ta, tb);
- if (resb == tarval_bad) return n; /* Causes exception! */
- a = new_Const (mode, resa);
- b = new_Const (mode, resb);
- evaluated = 1;
- }
- } else if (ta == get_mode_null(mode)) {
- b = a;
+ /* BEWARE: it is NOT possible to optimize a/a to 1, as this may cause a exception */
+
+ if (tb != tarval_bad) {
+ if (tb == get_mode_one(get_tarval_mode(tb))) {
+ b = new_Const (mode, get_mode_null(mode));
+ evaluated = 1;
+ } else if (ta != tarval_bad) {
+ tarval *resa, *resb;
+ resa = tarval_div (ta, tb);
+ if (resa == tarval_bad) return n; /* Causes exception!!! Model by replacing through
+ Jmp for X result!? */
+ resb = tarval_mod (ta, tb);
+ if (resb == tarval_bad) return n; /* Causes exception! */
+ a = new_Const (mode, resa);
+ b = new_Const (mode, resb);
evaluated = 1;
}
+ } else if (ta == get_mode_null(mode)) {
+ b = a;
+ evaluated = 1;
}
if (evaluated) { /* replace by tuple */
ir_node *mem = get_DivMod_mem(n);
set_Tuple_pred(n, pn_DivMod_X_except, new_Bad()); /* no exception */
set_Tuple_pred(n, pn_DivMod_res_div, a);
set_Tuple_pred(n, pn_DivMod_res_mod, b);
- assert(get_nodes_Block(n));
+ assert(get_nodes_block(n));
}
return n;
(get_opt_unreachable_code())) {
/* It's a boolean Cond, branching on a boolean constant.
Replace it by a tuple (Bad, Jmp) or (Jmp, Bad) */
- jmp = new_r_Jmp(current_ir_graph, get_nodes_Block(n));
+ jmp = new_r_Jmp(current_ir_graph, get_nodes_block(n));
turn_into_tuple(n, 2);
if (ta == tarval_b_true) {
set_Tuple_pred(n, pn_Cond_false, new_Bad());
set_Tuple_pred(n, pn_Cond_true, new_Bad());
}
/* We might generate an endless loop, so keep it alive. */
- add_End_keepalive(get_irg_end(current_ir_graph), get_nodes_Block(n));
+ add_End_keepalive(get_irg_end(current_ir_graph), get_nodes_block(n));
} else if ((ta != tarval_bad) &&
(get_irn_mode(a) == mode_Iu) &&
(get_Cond_kind(n) == dense) &&
Also this tuple might get really big...
I generate the Jmp here, and remember it in link. Link is used
when optimizing Proj. */
- set_irn_link(n, new_r_Jmp(current_ir_graph, get_nodes_Block(n)));
+ set_irn_link(n, new_r_Jmp(current_ir_graph, get_nodes_block(n)));
/* We might generate an endless loop, so keep it alive. */
- add_End_keepalive(get_irg_end(current_ir_graph), get_nodes_Block(n));
+ add_End_keepalive(get_irg_end(current_ir_graph), get_nodes_block(n));
} else if ((get_irn_op(a) == op_Eor)
&& (get_irn_mode(a) == mode_b)
- && (tarval_classify(computed_value(get_Eor_right(a))) == TV_CLASSIFY_ONE)) {
+ && (classify_tarval(computed_value(get_Eor_right(a))) == TV_CLASSIFY_ONE)) {
/* The Eor is a negate. Generate a new Cond without the negate,
simulate the negate by exchanging the results. */
- set_irn_link(n, new_r_Cond(current_ir_graph, get_nodes_Block(n),
+ set_irn_link(n, new_r_Cond(current_ir_graph, get_nodes_block(n),
get_Eor_left(a)));
} else if ((get_irn_op(a) == op_Not)
&& (get_irn_mode(a) == mode_b)) {
/* A Not before the Cond. Generate a new Cond without the Not,
simulate the Not by exchanging the results. */
- set_irn_link(n, new_r_Cond(current_ir_graph, get_nodes_Block(n),
+ set_irn_link(n, new_r_Cond(current_ir_graph, get_nodes_block(n),
get_Not_op(a)));
}
return n;
if ((get_irn_mode(n) == mode_b)
&& (get_irn_op(a) == op_Proj)
&& (get_irn_mode(a) == mode_b)
- && (tarval_classify (computed_value (b)) == TV_CLASSIFY_ONE)
+ && (classify_tarval (computed_value (b)) == TV_CLASSIFY_ONE)
&& (get_irn_op(get_Proj_pred(a)) == op_Cmp))
/* The Eor negates a Cmp. The Cmp has the negated result anyways! */
- n = new_r_Proj(current_ir_graph, get_nodes_Block(n), get_Proj_pred(a),
+ n = new_r_Proj(current_ir_graph, get_nodes_block(n), get_Proj_pred(a),
mode_b, get_negated_pnc(get_Proj_proj(a)));
else if ((get_irn_mode(n) == mode_b)
- && (tarval_classify (computed_value (b)) == TV_CLASSIFY_ONE))
+ && (classify_tarval (computed_value (b)) == TV_CLASSIFY_ONE))
/* The Eor is a Not. Replace it by a Not. */
/* ????!!!Extend to bitfield 1111111. */
- n = new_r_Not(current_ir_graph, get_nodes_Block(n), a, mode_b);
+ n = new_r_Not(current_ir_graph, get_nodes_block(n), a, mode_b);
return n;
}
+/**
+ * Transfor a boolean Not.
+ */
static ir_node *transform_node_Not(ir_node *n)
{
ir_node *a = get_Not_op(n);
&& (get_irn_mode(a) == mode_b)
&& (get_irn_op(get_Proj_pred(a)) == op_Cmp))
/* We negate a Cmp. The Cmp has the negated result anyways! */
- n = new_r_Proj(current_ir_graph, get_nodes_Block(n), get_Proj_pred(a),
+ n = new_r_Proj(current_ir_graph, get_nodes_block(n), get_Proj_pred(a),
mode_b, get_negated_pnc(get_Proj_proj(a)));
return n;
}
+/**
+ * Transform a Div/Mod/DivMod with a non-zero constant. Must be
+ * done here to avoid that this optimization runs more than once...
+ */
+static ir_node *transform_node_Proj(ir_node *proj)
+{
+ ir_node *n = get_Proj_pred(proj);
+ ir_node *b;
+ tarval *tb;
+
+ switch (get_irn_opcode(n)) {
+ case iro_Div:
+ b = get_Div_right(n);
+ tb = computed_value(b);
+
+ if (tb != tarval_bad && classify_tarval(tb) != TV_CLASSIFY_NULL) { /* div(x, c) && c != 0 */
+ ir_node *div, *proj;
+ ir_node *a = get_Div_left(n);
+ ir_node *mem = get_Div_mem(n);
+ int rem = get_optimize();
+
+ set_optimize(0);
+ {
+ div = new_rd_Div(get_irn_dbg_info(n), current_ir_graph,
+ get_nodes_block(n), get_irg_initial_mem(current_ir_graph), a, b);
+
+ proj = new_r_Proj(current_ir_graph, get_nodes_block(n), div, get_irn_mode(a), pn_Div_res);
+ }
+ set_optimize(rem);
+
+ turn_into_tuple(n, 3);
+ set_Tuple_pred(n, pn_Mod_M, mem);
+ set_Tuple_pred(n, pn_Mod_X_except, new_Bad());
+ set_Tuple_pred(n, pn_Mod_res, proj);
+ }
+ break;
+ case iro_Mod:
+ b = get_Mod_right(n);
+ tb = computed_value(b);
+
+ if (tb != tarval_bad && classify_tarval(tb) != TV_CLASSIFY_NULL) { /* mod(x, c) && c != 0 */
+ ir_node *mod, *proj;
+ ir_node *a = get_Mod_left(n);
+ ir_node *mem = get_Mod_mem(n);
+ int rem = get_optimize();
+
+ set_optimize(0);
+ {
+ mod = new_rd_Mod(get_irn_dbg_info(n), current_ir_graph,
+ get_nodes_block(n), get_irg_initial_mem(current_ir_graph), a, b);
+
+ proj = new_r_Proj(current_ir_graph, get_nodes_block(n), mod, get_irn_mode(a), pn_Mod_res);
+ }
+ set_optimize(rem);
+
+ turn_into_tuple(n, 3);
+ set_Tuple_pred(n, pn_Mod_M, mem);
+ set_Tuple_pred(n, pn_Mod_X_except, new_Bad());
+ set_Tuple_pred(n, pn_Mod_res, proj);
+ }
+ break;
+ case iro_DivMod:
+ b = get_DivMod_right(n);
+ tb = computed_value(b);
+
+ if (tb != tarval_bad && classify_tarval(tb) != TV_CLASSIFY_NULL) { /* DivMod(x, c) && c != 0 */
+ ir_node *div_mod, *proj_div, *proj_mod;
+ ir_node *a = get_Mod_left(n);
+ ir_node *mem = get_Mod_mem(n);
+ int rem = get_optimize();
+
+ set_optimize(0);
+ {
+ div_mod = new_rd_DivMod(get_irn_dbg_info(n), current_ir_graph,
+ get_nodes_block(n), get_irg_initial_mem(current_ir_graph), a, b);
+
+ proj_div = new_r_Proj(current_ir_graph, get_nodes_block(n), div_mod, get_irn_mode(a), pn_DivMod_res_div);
+ proj_mod = new_r_Proj(current_ir_graph, get_nodes_block(n), div_mod, get_irn_mode(a), pn_DivMod_res_mod);
+ }
+ set_optimize(rem);
+
+ turn_into_tuple(n, 4);
+ set_Tuple_pred(n, pn_DivMod_M, mem);
+ set_Tuple_pred(n, pn_DivMod_X_except, new_Bad());
+ set_Tuple_pred(n, pn_DivMod_res_div, proj_div);
+ set_Tuple_pred(n, pn_DivMod_res_mod, proj_mod);
+ }
+ break;
+
+ case iro_Cond:
+ if (get_opt_unreachable_code()) {
+ b = get_Cond_selector(n);
+ tb = computed_value(b);
+
+ if (tb != tarval_bad && mode_is_int(get_tarval_mode(tb))) {
+ /* we have a constant switch */
+ long num = get_Proj_proj(proj);
+
+ if (num != get_Cond_defaultProj(n)) { /* we cannot optimize default Proj's yet */
+ if (get_tarval_long(tb) == num) {
+ /* Do NOT create a jump here, or we will have 2 control flow ops
+ * in a block. This case is optimized away in optimize_cf(). */
+ return proj;
+ }
+ else
+ return new_Bad();
+ }
+ }
+ }
+ return proj;
+
+ default:
+ /* do nothing */
+ return proj;
+ }
+
+ /* we have added a Tuple, optimize it for the current Proj away */
+ return equivalent_node_Proj(proj);
+}
+
+/**
+ * Transform a Store before a Store to the same address...
+ * Both nodes must be in the same block.
+ *
+ * @todo Check for volatile! Moreover, what if the first store
+ * has a exception handler while the other has not?
+ */
+static ir_node *transform_node_Store(ir_node *store)
+{
+ ir_node *pred = skip_Proj(get_Store_mem(store));
+ ir_node *ptr = get_Store_ptr(store);
+
+ if (get_irn_op(pred) == op_Store &&
+ get_Store_ptr(pred) == ptr &&
+ get_nodes_block(pred) == get_nodes_block(store)) {
+ /* the Store n is useless, as it is overwritten by the store store */
+ ir_node *mem = get_Store_mem(pred);
+
+ turn_into_tuple(pred, 2);
+ set_Tuple_pred(pred, pn_Store_M, mem);
+ set_Tuple_pred(pred, pn_Store_X_except, new_Bad());
+ }
+ return store;
+}
+
+/**
+ * returns the operands of a commutative bin-op, if one operand is
+ * a const, it is returned as the second one.
+ */
+static void get_comm_Binop_Ops(ir_node *binop, ir_node **a, ir_node **c)
+{
+ ir_node *op_a = get_binop_left(binop);
+ ir_node *op_b = get_binop_right(binop);
+
+ assert(is_op_commutative(get_irn_op(binop)));
+
+ if (get_irn_op(op_a) == op_Const) {
+ *a = op_b;
+ *c = op_a;
+ }
+ else {
+ *a = op_a;
+ *c = op_b;
+ }
+}
+
+/**
+ * Optimize a Or(And(Or(And(v,c4),c3),c2),c1) pattern if possible.
+ * Such pattern may arise in bitfield stores.
+ *
+ * value c4 value c4 & c2
+ * AND c3 AND c1 | c3
+ * OR c2 ===> OR
+ * AND c1
+ * OR
+ */
+static ir_node *transform_node_Or(ir_node *or)
+{
+ ir_node *and, *c1;
+ ir_node *or_l, *c2;
+ ir_node *and_l, *c3;
+ ir_node *value, *c4;
+ ir_node *new_and, *new_const, *block;
+ ir_mode *mode = get_irn_mode(or);
+
+ tarval *tv1, *tv2, *tv3, *tv4, *tv, *n_tv4, *n_tv2;
+
+ get_comm_Binop_Ops(or, &and, &c1);
+ if ((get_irn_op(c1) != op_Const) || (get_irn_op(and) != op_And))
+ return or;
+
+ get_comm_Binop_Ops(and, &or_l, &c2);
+ if ((get_irn_op(c2) != op_Const) || (get_irn_op(or_l) != op_Or))
+ return or;
+
+ get_comm_Binop_Ops(or_l, &and_l, &c3);
+ if ((get_irn_op(c3) != op_Const) || (get_irn_op(and_l) != op_And))
+ return or;
+
+ get_comm_Binop_Ops(and_l, &value, &c4);
+ if (get_irn_op(c4) != op_Const)
+ return or;
+
+ /* ok, found the pattern, check for conditions */
+ assert(mode == get_irn_mode(and));
+ assert(mode == get_irn_mode(or_l));
+ assert(mode == get_irn_mode(and_l));
+
+ tv1 = get_Const_tarval(c1);
+ tv2 = get_Const_tarval(c2);
+ tv3 = get_Const_tarval(c3);
+ tv4 = get_Const_tarval(c4);
+
+ tv = tarval_or(tv4, tv2);
+ if (classify_tarval(tv) != TV_CLASSIFY_ALL_ONE) {
+ /* have at least one 0 at the same bit position */
+ return or;
+ }
+
+ n_tv4 = tarval_not(tv4);
+ if (tv3 != tarval_and(tv3, n_tv4)) {
+ /* bit in the or_mask is outside the and_mask */
+ return or;
+ }
+
+ n_tv2 = tarval_not(tv2);
+ if (tv1 != tarval_and(tv1, n_tv2)) {
+ /* bit in the or_mask is outside the and_mask */
+ return or;
+ }
+
+ /* ok, all conditions met */
+ block = get_nodes_block(or);
+
+ new_and = new_r_And(current_ir_graph, block,
+ value, new_r_Const(current_ir_graph, block, mode, tarval_and(tv4, tv2)), mode);
+
+ new_const = new_r_Const(current_ir_graph, block, mode, tarval_or(tv3, tv1));
+
+ set_Or_left(or, new_and);
+ set_Or_right(or, new_const);
+
+ /* check for more */
+ return transform_node_Or(or);
+}
/**
* Tries several [inplace] [optimizing] transformations and returns an
CASE(Cond);
CASE(Eor);
CASE(Not);
+ CASE(Proj);
+ CASE(Store); /* dangerous, see todo */
+ CASE(Or);
default:
op->transform_node = NULL;
}
static int node_cmp_attr_SymConst(ir_node *a, ir_node *b)
{
return (get_irn_symconst_attr(a).num != get_irn_symconst_attr(b).num)
- || (get_irn_symconst_attr(a).tori.typ != get_irn_symconst_attr(b).tori.typ);
+ || (get_irn_symconst_attr(a).sym.type_p != get_irn_symconst_attr(b).sym.type_p);
}
static int node_cmp_attr_Call(ir_node *a, ir_node *b)
if (irn_arity_a != get_irn_arity(b))
return 1;
- /* for block-local cse and pinned nodes: */
- if (!get_opt_global_cse() || (get_op_pinned(get_irn_op(a)) == pinned)) {
+ /* for block-local cse and op_pin_state_pinned nodes: */
+ if (!get_opt_global_cse() || (get_op_pinned(get_irn_op(a)) == op_pin_state_pinned)) {
if (get_irn_n(a, -1) != get_irn_n(b, -1))
return 1;
}
return 0;
}
-/**
+/*
* Calculate a hash value of a node.
*/
-static unsigned
+unsigned
ir_node_hash (ir_node *node)
{
unsigned h;
int i, irn_arity;
- /* hash table value = 9*(9*(9*(9*(9*arity+in[0])+in[1])+ ...)+mode)+code */
- h = irn_arity = get_irn_arity(node);
+ if (node->op == op_Const) {
+ /* special value for const, as they only differ in their tarval. */
+ h = ((unsigned) node->attr.con.tv)>>3 ;
+ h = 9*h + (unsigned)get_irn_mode(node);
+ } else if (node->op == op_SymConst) {
+ /* special value for const, as they only differ in their symbol. */
+ h = ((unsigned) node->attr.i.sym.type_p)>>3 ;
+ h = 9*h + (unsigned)get_irn_mode(node);
+ } else {
- /* consider all in nodes... except the block. */
- for (i = 0; i < irn_arity; i++) {
- h = 9*h + (unsigned long)get_irn_n(node, i);
- }
+ /* hash table value = 9*(9*(9*(9*(9*arity+in[0])+in[1])+ ...)+mode)+code */
+ h = irn_arity = get_irn_arity(node);
- /* ...mode,... */
- h = 9*h + (unsigned long) get_irn_mode (node);
- /* ...and code */
- h = 9*h + (unsigned long) get_irn_op (node);
+ /* consider all in nodes... except the block. */
+ for (i = 0; i < irn_arity; i++) {
+ h = 9*h + (unsigned)get_irn_n(node, i);
+ }
+
+ /* ...mode,... */
+ h = 9*h + (unsigned) get_irn_mode (node);
+ /* ...and code */
+ h = 9*h + (unsigned) get_irn_op (node);
+ }
return h;
}
/**
* Return the canonical node computing the same value as n.
* 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)
}
/**
- * During construction we set the pinned flag in the graph right when the
- * optimizatin is performed. The flag turning on procedure global cse could
+ * 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.
*/
static INLINE ir_node *
ir_node *old = n;
n = identify(value_table, n);
if (get_irn_n(old, -1) != get_irn_n(n, -1))
- set_irg_pinned(current_ir_graph, floats);
+ set_irg_pinned(current_ir_graph, op_pin_state_floats);
return n;
}
* we MUST copy the node here temparary, because it's still needed
* for DBG_OPT_ALGSIM0
*/
- ir_node x = *n;
- oldn = &x;
+ int node_size = offsetof(ir_node, attr) + n->op->attr_size;
+ ir_node *x = alloca(node_size);
+
+ memcpy(x, n, node_size);
+ oldn = x;
+
/* evaluation was successful -- replace the node. */
obstack_free (current_ir_graph->obst, n);
n = new_Const (get_tarval_mode (tv), tv);
/** common subexpression elimination **/
/* Checks whether n is already available. */
/* The block input is used to distinguish different subexpressions. Right
- now all nodes are pinned to blocks, i.e., the cse only finds common
+ 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_cons (current_ir_graph->value_table, n);
/** common subexpression elimination **/
/* Checks whether n is already available. */
/* The block input is used to distinguish different subexpressions. Right
- now all nodes are pinned to blocks, i.e., the cse only finds common
+ 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);
assert(get_irg_phase_state(current_ir_graph) != phase_building);
if (get_opt_global_cse())
- set_irg_pinned(current_ir_graph, floats);
+ set_irg_pinned(current_ir_graph, op_pin_state_floats);
if (get_irg_outs_state(current_ir_graph) == outs_consistent)
set_irg_outs_inconsistent(current_ir_graph);
/* Maybe we could also test whether optimizing the node can
projects / libfirm / blobdiff