/*
- * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2010 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
#include "iredges_t.h"
#include "irgwalk.h"
-#include "../benode_t.h"
+#include "../benode.h"
+#include "../belive.h"
#define AGGRESSIVE_AM
/* gas/ld don't support negative symconsts :-( */
#undef SUPPORT_NEGATIVE_SYMCONSTS
-static be_lv_t *lv;
static bitset_t *non_address_mode_nodes;
/**
if (get_SymConst_kind(node) != symconst_addr_ent)
return 0;
- (*symconsts)++;
- if (*symconsts > 1)
+ if (++*symconsts > 1)
return 0;
return 1;
+ case iro_Unknown:
+ /* we can use '0' for Unknowns */
+ return 1;
case iro_Add:
case iro_Sub:
/* Add's and Sub's are typically supported as long as both operands are
* immediates */
- if (bitset_is_set(non_address_mode_nodes, get_irn_idx(node)))
+ if (ia32_is_non_address_mode_node(node))
return 0;
- left = get_binop_left(node);
- right = get_binop_right(node);
+ left = get_binop_left(node);
if (!do_is_immediate(left, symconsts, negate))
return 0;
+ right = get_binop_right(node);
if (!do_is_immediate(right, symconsts, is_Sub(node) ? !negate : negate))
return 0;
}
}
-/**
- * Checks if a DAG with a single root node can be represented as a simple immediate.
- *
- * @param node the node
- *
- * @return non-zero if the DAG represents an immediate, 0 else
- */
-#if 0
-static int is_immediate_simple(const ir_node *node) {
- int symconsts = 0;
- return do_is_immediate(node, &symconsts, 0);
-}
-#endif
-
/**
* Check if a DAG starting with root node can be folded into an address mode
* as an immediate.
*/
static void eat_immediate(ia32_address_t *addr, ir_node *node, int negate)
{
- tarval *tv;
- ir_node *left;
- ir_node *right;
- long val;
+ ir_tarval *tv;
+ ir_node *left;
+ ir_node *right;
+ long val;
switch (get_irn_opcode(node)) {
case iro_Const:
#endif
addr->symconst_sign = negate;
break;
+ case iro_Unknown:
+ break;
case iro_Add:
- assert(!bitset_is_set(non_address_mode_nodes, get_irn_idx(node)));
+ assert(!ia32_is_non_address_mode_node(node));
left = get_Add_left(node);
- right = get_Add_right(node);
eat_immediate(addr, left, negate);
+ right = get_Add_right(node);
eat_immediate(addr, right, negate);
break;
case iro_Sub:
- assert(!bitset_is_set(non_address_mode_nodes, get_irn_idx(node)));
+ assert(!ia32_is_non_address_mode_node(node));
left = get_Sub_left(node);
- right = get_Sub_right(node);
eat_immediate(addr, left, negate);
+ right = get_Sub_right(node);
eat_immediate(addr, right, !negate);
break;
default:
*
* @param addr the address mode data so far
* @param node the node
- * @param force if set, ignore the marking of node as a non-address-mode node
+ * @param flags the flags
*
* @return the folded node
*/
-static ir_node *eat_immediates(ia32_address_t *addr, ir_node *node, int force)
+static ir_node *eat_immediates(ia32_address_t *addr, ir_node *node,
+ ia32_create_am_flags_t flags)
{
- if (!force && bitset_is_set(non_address_mode_nodes, get_irn_idx(node)))
+ if (!(flags & ia32_create_am_force) &&
+ ia32_is_non_address_mode_node(node) &&
+ (!(flags & ia32_create_am_double_use) || get_irn_n_edges(node) > 2))
return node;
if (is_Add(node)) {
if (is_immediate(addr, left, 0)) {
eat_immediate(addr, left, 0);
- return eat_immediates(addr, right, 0);
+ return eat_immediates(addr, right, ia32_create_am_normal);
}
if (is_immediate(addr, right, 0)) {
eat_immediate(addr, right, 0);
- return eat_immediates(addr, left, 0);
+ return eat_immediates(addr, left, ia32_create_am_normal);
}
} else if (is_Sub(node)) {
ir_node *left = get_Sub_left(node);
if (is_immediate(addr, right, 1)) {
eat_immediate(addr, right, 1);
- return eat_immediates(addr, left, 0);
+ return eat_immediates(addr, left, ia32_create_am_normal);
}
}
long val;
if (is_Shl(node)) {
- ir_node *right = get_Shl_right(node);
- tarval *tv;
+ ir_node *right = get_Shl_right(node);
+ ir_tarval *tv;
/* we can use shl with 1, 2 or 3 shift */
if (!is_Const(right))
/* we can only eat a shl if we don't have a scale or index set yet */
if (addr->scale != 0 || addr->index != NULL)
return 0;
- if (bitset_is_set(non_address_mode_nodes, get_irn_idx(node)))
+ if (ia32_is_non_address_mode_node(node))
return 0;
#ifndef AGGRESSIVE_AM
}
/* Create an address mode for a given node. */
-void ia32_create_address_mode(ia32_address_t *addr, ir_node *node, int force)
+void ia32_create_address_mode(ia32_address_t *addr, ir_node *node, ia32_create_am_flags_t flags)
{
- int res = 0;
ir_node *eat_imms;
if (is_immediate(addr, node, 0)) {
}
#ifndef AGGRESSIVE_AM
- if (!force && get_irn_n_edges(node) > 1) {
+ if (!(flags & ia32_create_am_force) && get_irn_n_edges(node) > 1) {
addr->base = node;
return;
}
#endif
- if (!force && bitset_is_set(non_address_mode_nodes, get_irn_idx(node))) {
+ if (!(flags & ia32_create_am_force) &&
+ ia32_is_non_address_mode_node(node) &&
+ (!(flags & ia32_create_am_double_use) || get_irn_n_edges(node) > 2)) {
addr->base = node;
return;
}
- eat_imms = eat_immediates(addr, node, force);
+ eat_imms = eat_immediates(addr, node, flags);
if (eat_imms != node) {
- if (force) {
+ if (flags & ia32_create_am_force) {
eat_imms = ia32_skip_downconv(eat_imms);
}
- res = 1;
node = eat_imms;
#ifndef AGGRESSIVE_AM
if (get_irn_n_edges(node) > 1) {
return;
}
#endif
- if (bitset_is_set(non_address_mode_nodes, get_irn_idx(node))) {
+ if (ia32_is_non_address_mode_node(node)) {
addr->base = node;
return;
}
ir_node *left = get_Add_left(node);
ir_node *right = get_Add_right(node);
- if (force) {
+ if (flags & ia32_create_am_force) {
left = ia32_skip_downconv(left);
right = ia32_skip_downconv(right);
}
- assert(force || !is_immediate(addr, left, 0));
- assert(force || !is_immediate(addr, right, 0));
+ assert(flags & ia32_create_am_force || !is_immediate(addr, left, 0));
+ assert(flags & ia32_create_am_force || !is_immediate(addr, right, 0));
if (eat_shl(addr, left)) {
left = NULL;
}
if (left != NULL &&
be_is_FrameAddr(left) &&
- !bitset_is_set(non_address_mode_nodes, get_irn_idx(left))) {
+ !ia32_is_non_address_mode_node(left)) {
assert(addr->base == NULL);
assert(addr->frame_entity == NULL);
addr->base = be_get_FrameAddr_frame(left);
left = NULL;
} else if (right != NULL &&
be_is_FrameAddr(right) &&
- !bitset_is_set(non_address_mode_nodes, get_irn_idx(right))) {
+ !ia32_is_non_address_mode_node(right)) {
assert(addr->base == NULL);
assert(addr->frame_entity == NULL);
addr->base = be_get_FrameAddr_frame(right);
bitset_set(non_address_mode_nodes, get_irn_idx(node));
}
-int ia32_is_non_address_mode_node(ir_node *node)
+int ia32_is_non_address_mode_node(ir_node const *node)
{
return bitset_is_set(non_address_mode_nodes, get_irn_idx(node));
}
-static int value_last_used_here(ir_node *here, ir_node *value)
+/**
+ * Check if a given value is last used (i.e. die after) the block of some other node.
+ */
+static int value_last_used_here(be_lv_t *lv, ir_node *here, ir_node *value)
{
- ir_node *block = get_nodes_block(here);
+ ir_node *block = get_nodes_block(here);
const ir_edge_t *edge;
/* If the value is live end it is for sure it does not die here */
*/
static void mark_non_address_nodes(ir_node *node, void *env)
{
- int i, arity;
+ be_lv_t *lv = (be_lv_t*)env;
+ int arity;
+ int i;
ir_node *val;
ir_node *left;
ir_node *right;
ir_mode *mode;
- (void) env;
mode = get_irn_mode(node);
if (!mode_is_int(mode) && !mode_is_reference(mode) && mode != mode_b)
case iro_Store:
/* Do not mark the pointer, because we want to turn it into AM. */
val = get_Store_value(node);
- bitset_set(non_address_mode_nodes, get_irn_idx(val));
+ ia32_mark_non_am(val);
break;
case iro_Shl:
* an addition and has the same register pressure for the case that only
* one operand dies, but is faster (on Pentium 4).
* && instead of || only folds AM if both operands do not die here */
- if (!value_last_used_here(node, left) ||
- !value_last_used_here(node, right)) {
+ if (!value_last_used_here(lv, node, left) ||
+ !value_last_used_here(lv, node, right)) {
return;
}
/* At least one of left and right are not used by anyone else, so it is
* beneficial for the register pressure (if both are unused otherwise,
* else neutral) and ALU use to not fold AM. */
- bitset_set(non_address_mode_nodes, get_irn_idx(node));
+ ia32_mark_non_am(node);
break;
default:
for (i = 0; i < arity; ++i) {
ir_node *in = get_irn_n(node, i);
- bitset_set(non_address_mode_nodes, get_irn_idx(in));
+ ia32_mark_non_am(in);
}
break;
}
}
-void ia32_calculate_non_address_mode_nodes(be_irg_t *birg)
+void ia32_calculate_non_address_mode_nodes(ir_graph *irg)
{
- ir_graph *irg = be_get_birg_irg(birg);
+ be_lv_t *lv = be_assure_liveness(irg);
- lv = be_assure_liveness(birg);
non_address_mode_nodes = bitset_malloc(get_irg_last_idx(irg));
- irg_walk_graph(irg, NULL, mark_non_address_nodes, NULL);
+ irg_walk_graph(irg, NULL, mark_non_address_nodes, lv);
}
void ia32_free_non_address_mode_nodes(void)
projects / libfirm / blobdiff