/*
- * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
- *
* This file is part of libFirm.
- *
- * This file may be distributed and/or modified under the terms of the
- * GNU General Public License version 2 as published by the Free Software
- * Foundation and appearing in the file LICENSE.GPL included in the
- * packaging of this file.
- *
- * Licensees holding valid libFirm Professional Edition licenses may use
- * this file in accordance with the libFirm Commercial License.
- * Agreement provided with the Software.
- *
- * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
- * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE.
+ * Copyright (C) 2012 University of Karlsruhe.
*/
/**
* @file
* @brief Implements several optimizations for IA32.
* @author Matthias Braun, Christian Wuerdig
- * @version $Id$
*/
#include "config.h"
#include "tv.h"
#include "irgmod.h"
#include "irgwalk.h"
-#include "height.h"
-#include "irbitset.h"
+#include "heights.h"
#include "irprintf.h"
+#include "irdump.h"
#include "error.h"
+#include "firmstat_t.h"
-#include "../be_t.h"
-#include "../beabi.h"
-#include "../benode.h"
-#include "../besched.h"
-#include "../bepeephole.h"
+#include "be_t.h"
+#include "beabi.h"
+#include "benode.h"
+#include "besched.h"
+#include "bepeephole.h"
#include "ia32_new_nodes.h"
#include "ia32_optimize.h"
#include "ia32_common_transform.h"
#include "ia32_transform.h"
#include "ia32_dbg_stat.h"
-#include "ia32_util.h"
#include "ia32_architecture.h"
DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
-static ia32_code_gen_t *cg;
-
-static void copy_mark(const ir_node *old, ir_node *new)
+static void copy_mark(const ir_node *old, ir_node *newn)
{
if (is_ia32_is_reload(old))
- set_ia32_is_reload(new);
+ set_ia32_is_reload(newn);
if (is_ia32_is_spill(old))
- set_ia32_is_spill(new);
+ set_ia32_is_spill(newn);
if (is_ia32_is_remat(old))
- set_ia32_is_remat(new);
+ set_ia32_is_remat(newn);
}
typedef enum produces_flag_t {
produces_no_flag,
- produces_flag_zero,
- produces_flag_carry
+ produces_zero_sign,
+ produces_zero_in_carry
} produces_flag_t;
/**
- * Return which usable flag the given node produces
+ * Return which usable flag the given node produces about the result.
+ * That is zero (ZF) and sign(SF).
+ * We do not check for carry (CF) or overflow (OF).
*
* @param node the node to check
* @param pn the projection number of the used result
*/
-static produces_flag_t produces_test_flag(ir_node *node, int pn)
+static produces_flag_t check_produces_zero_sign(ir_node *node, int pn)
{
ir_node *count;
const ia32_immediate_attr_t *imm_attr;
case iro_ia32_ShlD:
case iro_ia32_ShrD:
- assert(n_ia32_ShlD_count == n_ia32_ShrD_count);
+ assert((int)n_ia32_ShlD_count == (int)n_ia32_ShrD_count);
count = get_irn_n(node, n_ia32_ShlD_count);
goto check_shift_amount;
case iro_ia32_Shl:
case iro_ia32_Shr:
case iro_ia32_Sar:
- assert(n_ia32_Shl_count == n_ia32_Shr_count
- && n_ia32_Shl_count == n_ia32_Sar_count);
+ assert((int)n_ia32_Shl_count == (int)n_ia32_Shr_count
+ && (int)n_ia32_Shl_count == (int)n_ia32_Sar_count);
count = get_irn_n(node, n_ia32_Shl_count);
check_shift_amount:
/* when shift count is zero the flags are not affected, so we can only
case iro_ia32_Mul:
return pn == pn_ia32_Mul_res_high ?
- produces_flag_carry : produces_no_flag;
+ produces_zero_in_carry : produces_no_flag;
default:
return produces_no_flag;
}
- return pn == pn_ia32_res ?
- produces_flag_zero : produces_no_flag;
+ return pn == pn_ia32_res ? produces_zero_sign : produces_no_flag;
}
/**
*/
static void peephole_ia32_Cmp(ir_node *const node)
{
- ir_node *right;
- ia32_immediate_attr_t const *imm;
- dbg_info *dbgi;
- ir_node *block;
- ir_node *noreg;
- ir_node *nomem;
- ir_node *op;
- ia32_attr_t const *attr;
- int ins_permuted;
- int cmp_unsigned;
- ir_node *test;
- arch_register_t const *reg;
- ir_edge_t const *edge;
- ir_edge_t const *tmp;
-
if (get_ia32_op_type(node) != ia32_Normal)
return;
- right = get_irn_n(node, n_ia32_Cmp_right);
+ ir_node *const right = get_irn_n(node, n_ia32_Cmp_right);
if (!is_ia32_Immediate(right))
return;
- imm = get_ia32_immediate_attr_const(right);
+ ia32_immediate_attr_t const *const imm = get_ia32_immediate_attr_const(right);
if (imm->symconst != NULL || imm->offset != 0)
return;
- dbgi = get_irn_dbg_info(node);
- block = get_nodes_block(node);
- noreg = ia32_new_NoReg_gp(cg);
- nomem = get_irg_no_mem(current_ir_graph);
- op = get_irn_n(node, n_ia32_Cmp_left);
- attr = get_irn_generic_attr(node);
- ins_permuted = attr->data.ins_permuted;
- cmp_unsigned = attr->data.cmp_unsigned;
-
- if (is_ia32_Cmp(node)) {
- test = new_bd_ia32_Test(dbgi, block, noreg, noreg, nomem,
- op, op, ins_permuted, cmp_unsigned);
- } else {
- test = new_bd_ia32_Test8Bit(dbgi, block, noreg, noreg, nomem,
- op, op, ins_permuted, cmp_unsigned);
- }
- set_ia32_ls_mode(test, get_ia32_ls_mode(node));
+ dbg_info *const dbgi = get_irn_dbg_info(node);
+ ir_node *const block = get_nodes_block(node);
+ ir_graph *const irg = get_Block_irg(block);
+ ir_node *const noreg = ia32_new_NoReg_gp(irg);
+ ir_node *const nomem = get_irg_no_mem(irg);
+ ir_node *const op = get_irn_n(node, n_ia32_Cmp_left);
+ int const ins_permuted = get_ia32_attr(node)->data.ins_permuted;
+
+ ir_mode *const ls_mode = get_ia32_ls_mode(node);
+ ir_node *const test = get_mode_size_bits(ls_mode) == 8
+ ? new_bd_ia32_Test_8bit(dbgi, block, noreg, noreg, nomem, op, op, ins_permuted)
+ : new_bd_ia32_Test (dbgi, block, noreg, noreg, nomem, op, op, ins_permuted);
+ set_ia32_ls_mode(test, ls_mode);
- reg = arch_irn_get_register(node, pn_ia32_Cmp_eflags);
- arch_irn_set_register(test, pn_ia32_Test_eflags, reg);
+ arch_register_t const *const reg = arch_get_irn_register_out(node, pn_ia32_Cmp_eflags);
+ arch_set_irn_register_out(test, pn_ia32_Test_eflags, reg);
- foreach_out_edge_safe(node, edge, tmp) {
+ foreach_out_edge_safe(node, edge) {
ir_node *const user = get_edge_src_irn(edge);
if (is_Proj(user))
ir_node *left = get_irn_n(node, n_ia32_Test_left);
ir_node *right = get_irn_n(node, n_ia32_Test_right);
- assert(n_ia32_Test_left == n_ia32_Test8Bit_left
- && n_ia32_Test_right == n_ia32_Test8Bit_right);
-
if (left == right) { /* we need a test for 0 */
ir_node *block = get_nodes_block(node);
int pn = pn_ia32_res;
+ ir_node *op = left;
ir_node *flags_proj;
ir_mode *flags_mode;
+ ir_mode *op_mode;
ir_node *schedpoint;
- const ir_edge_t *edge;
+ produces_flag_t produced;
if (get_nodes_block(left) != block)
return;
- if (is_Proj(left)) {
- pn = get_Proj_proj(left);
- left = get_Proj_pred(left);
+ if (is_Proj(op)) {
+ pn = get_Proj_proj(op);
+ op = get_Proj_pred(op);
}
- /* happens rarely, but if it does code will panic' */
- if (is_ia32_Unknown_GP(left))
- return;
-
- /* walk schedule up and abort when we find left or some other node destroys
- the flags */
+ /* walk schedule up and abort when we find left or some other node
+ * destroys the flags */
schedpoint = node;
for (;;) {
schedpoint = sched_prev(schedpoint);
- if (schedpoint == left)
+ if (schedpoint == op)
break;
if (arch_irn_is(schedpoint, modify_flags))
return;
panic("couldn't find left");
}
- /* make sure only Lg/Eq tests are used */
+ produced = check_produces_zero_sign(op, pn);
+ if (produced == produces_no_flag)
+ return;
+
+ /* make sure users only look at the sign/zero flag */
foreach_out_edge(node, edge) {
- ir_node *user = get_edge_src_irn(edge);
- int pnc = get_ia32_condcode(user);
+ ir_node *user = get_edge_src_irn(edge);
+ ia32_condition_code_t cc = get_ia32_condcode(user);
- if(pnc != pn_Cmp_Eq && pnc != pn_Cmp_Lg) {
- return;
+ if (cc == ia32_cc_equal || cc == ia32_cc_not_equal)
+ continue;
+ if (produced == produces_zero_sign
+ && (cc == ia32_cc_sign || cc == ia32_cc_not_sign)) {
+ continue;
}
+ return;
}
- switch (produces_test_flag(left, pn)) {
- case produces_flag_zero:
- break;
+ op_mode = get_ia32_ls_mode(op);
+ if (op_mode == NULL)
+ op_mode = get_irn_mode(op);
- case produces_flag_carry:
- foreach_out_edge(node, edge) {
- ir_node *user = get_edge_src_irn(edge);
- int pnc = get_ia32_condcode(user);
-
- switch (pnc) {
- case pn_Cmp_Eq: pnc = pn_Cmp_Ge | ia32_pn_Cmp_unsigned; break;
- case pn_Cmp_Lg: pnc = pn_Cmp_Lt | ia32_pn_Cmp_unsigned; break;
- default: panic("unexpected pn");
- }
- set_ia32_condcode(user, pnc);
- }
- break;
+ /* Make sure we operate on the same bit size */
+ if (get_mode_size_bits(op_mode) != get_mode_size_bits(get_ia32_ls_mode(node)))
+ return;
- default:
- return;
+ if (produced == produces_zero_in_carry) {
+ /* patch users to look at the carry instead of the zero flag */
+ foreach_out_edge(node, edge) {
+ ir_node *user = get_edge_src_irn(edge);
+ ia32_condition_code_t cc = get_ia32_condcode(user);
+
+ switch (cc) {
+ case ia32_cc_equal: cc = ia32_cc_above_equal; break;
+ case ia32_cc_not_equal: cc = ia32_cc_below; break;
+ default: panic("unexpected pn");
+ }
+ set_ia32_condcode(user, cc);
+ }
}
- if (get_irn_mode(left) != mode_T) {
- set_irn_mode(left, mode_T);
+ if (get_irn_mode(op) != mode_T) {
+ set_irn_mode(op, mode_T);
/* If there are other users, reroute them to result proj */
- if (get_irn_n_edges(left) != 2) {
- ir_node *res = new_r_Proj(block, left, mode_Iu, pn_ia32_res);
-
- edges_reroute(left, res, current_ir_graph);
- /* Reattach the result proj to left */
- set_Proj_pred(res, left);
+ if (get_irn_n_edges(op) != 2) {
+ ir_node *res = new_r_Proj(op, mode_Iu, pn_ia32_res);
+ edges_reroute_except(op, res, res);
}
+ } else {
+ if (get_irn_n_edges(left) == 2)
+ kill_node(left);
}
flags_mode = ia32_reg_classes[CLASS_ia32_flags].mode;
- flags_proj = new_r_Proj(block, left, flags_mode, pn_ia32_flags);
- arch_set_irn_register(flags_proj, &ia32_flags_regs[REG_EFLAGS]);
+ flags_proj = new_r_Proj(op, flags_mode, pn_ia32_flags);
+ arch_set_irn_register(flags_proj, &ia32_registers[REG_EFLAGS]);
assert(get_irn_mode(node) != mode_T);
offset = imm->offset;
if (get_ia32_op_type(node) == ia32_AddrModeS) {
- ia32_attr_t *const attr = get_irn_generic_attr(node);
+ ia32_attr_t *const attr = get_ia32_attr(node);
+ ir_graph *const irg = get_irn_irg(node);
if ((offset & 0xFFFFFF00) == 0) {
/* attr->am_offs += 0; */
} else if ((offset & 0xFFFF00FF) == 0) {
- ir_node *imm = ia32_create_Immediate(NULL, 0, offset >> 8);
- set_irn_n(node, n_ia32_Test_right, imm);
+ ir_node *imm_node = ia32_create_Immediate(irg, NULL, 0, offset >> 8);
+ set_irn_n(node, n_ia32_Test_right, imm_node);
attr->am_offs += 1;
} else if ((offset & 0xFF00FFFF) == 0) {
- ir_node *imm = ia32_create_Immediate(NULL, 0, offset >> 16);
- set_irn_n(node, n_ia32_Test_right, imm);
+ ir_node *imm_node = ia32_create_Immediate(irg, NULL, 0, offset >> 16);
+ set_irn_n(node, n_ia32_Test_right, imm_node);
attr->am_offs += 2;
} else if ((offset & 0x00FFFFFF) == 0) {
- ir_node *imm = ia32_create_Immediate(NULL, 0, offset >> 24);
- set_irn_n(node, n_ia32_Test_right, imm);
+ ir_node *imm_node = ia32_create_Immediate(irg, NULL, 0, offset >> 24);
+ set_irn_n(node, n_ia32_Test_right, imm_node);
attr->am_offs += 3;
} else {
return;
} else if (offset < 256) {
arch_register_t const* const reg = arch_get_irn_register(left);
- if (reg != &ia32_gp_regs[REG_EAX] &&
- reg != &ia32_gp_regs[REG_EBX] &&
- reg != &ia32_gp_regs[REG_ECX] &&
- reg != &ia32_gp_regs[REG_EDX]) {
+ if (reg != &ia32_registers[REG_EAX] &&
+ reg != &ia32_registers[REG_EBX] &&
+ reg != &ia32_registers[REG_ECX] &&
+ reg != &ia32_registers[REG_EDX]) {
return;
}
} else {
*/
static void peephole_ia32_Return(ir_node *node)
{
- ir_node *block, *irn;
-
if (!ia32_cg_config.use_pad_return)
return;
- block = get_nodes_block(node);
-
/* check if this return is the first on the block */
- sched_foreach_reverse_from(node, irn) {
+ sched_foreach_reverse_before(node, irn) {
switch (get_irn_opcode(irn)) {
- case beo_Return:
- /* the return node itself, ignore */
- continue;
- case iro_Start:
case beo_Start:
- case beo_Barrier:
/* ignore no code generated */
continue;
case beo_IncSP:
}
/* only optimize up to 48 stores behind IncSPs */
-#define MAXPUSH_OPTIMIZE 48
+#define MAXPUSH_OPTIMIZE 48
/**
* Tries to create Push's from IncSP, Store combinations.
*/
static void peephole_IncSP_Store_to_push(ir_node *irn)
{
- int i;
- int maxslot;
- int inc_ofs;
- ir_node *node;
- ir_node *stores[MAXPUSH_OPTIMIZE];
- ir_node *block;
- ir_graph *irg;
- ir_node *curr_sp;
- ir_mode *spmode;
- ir_node *first_push = NULL;
- ir_edge_t const *edge;
- ir_edge_t const *next;
+ int i;
+ int maxslot;
+ ir_node *stores[MAXPUSH_OPTIMIZE];
+ ir_node *block;
+ ir_graph *irg;
+ ir_node *curr_sp;
+ ir_mode *spmode;
+ ir_node *first_push = NULL;
memset(stores, 0, sizeof(stores));
- assert(be_is_IncSP(irn));
-
- inc_ofs = be_get_IncSP_offset(irn);
+ int inc_ofs = be_get_IncSP_offset(irn);
if (inc_ofs < 4)
return;
* attached to the node
*/
maxslot = -1;
- for (node = sched_next(irn); !sched_is_end(node); node = sched_next(node)) {
+ sched_foreach_after(irn, node) {
ir_node *mem;
int offset;
int storeslot;
/* walk through the Stores and create Pushs for them */
block = get_nodes_block(irn);
spmode = get_irn_mode(irn);
- irg = cg->irg;
+ irg = get_irn_irg(irn);
for (; i >= 0; --i) {
const arch_register_t *spreg;
ir_node *push;
ir_node *val, *mem, *mem_proj;
ir_node *store = stores[i];
- ir_node *noreg = ia32_new_NoReg_gp(cg);
+ ir_node *noreg = ia32_new_NoReg_gp(irg);
val = get_irn_n(store, n_ia32_unary_op);
mem = get_irn_n(store, n_ia32_mem);
spreg = arch_get_irn_register(curr_sp);
- push = new_bd_ia32_Push(get_irn_dbg_info(store), block, noreg, noreg, mem, val, curr_sp);
+ push = new_bd_ia32_Push(get_irn_dbg_info(store), block, noreg, noreg,
+ mem, val, curr_sp);
copy_mark(store, push);
if (first_push == NULL)
sched_add_after(skip_Proj(curr_sp), push);
/* create stackpointer Proj */
- curr_sp = new_r_Proj(block, push, spmode, pn_ia32_Push_stack);
+ curr_sp = new_r_Proj(push, spmode, pn_ia32_Push_stack);
arch_set_irn_register(curr_sp, spreg);
/* create memory Proj */
- mem_proj = new_r_Proj(block, push, mode_M, pn_ia32_Push_M);
+ mem_proj = new_r_Proj(push, mode_M, pn_ia32_Push_M);
+
+ /* rewire Store Projs */
+ foreach_out_edge_safe(store, edge) {
+ ir_node *proj = get_edge_src_irn(edge);
+ if (!is_Proj(proj))
+ continue;
+ switch (get_Proj_proj(proj)) {
+ case pn_ia32_Store_M:
+ exchange(proj, mem_proj);
+ break;
+ default:
+ panic("unexpected Proj on Store->IncSp");
+ }
+ }
/* use the memproj now */
- be_peephole_exchange(store, mem_proj);
+ be_peephole_exchange(store, push);
inc_ofs -= 4;
}
- foreach_out_edge_safe(irn, edge, next) {
+ foreach_out_edge_safe(irn, edge) {
ir_node *const src = get_edge_src_irn(edge);
int const pos = get_edge_src_pos(edge);
be_set_IncSP_offset(irn, inc_ofs);
}
-#if 0
-static void peephole_store_incsp(ir_node *store)
-{
- dbg_info *dbgi;
- ir_node *node;
- ir_node *block;
- ir_node *noreg;
- ir_node *mem;
- ir_node *push;
- ir_node *val;
- ir_node *base;
- ir_node *index;
- ir_node *am_base = get_irn_n(store, n_ia32_Store_base);
- if (!be_is_IncSP(am_base)
- || get_nodes_block(am_base) != get_nodes_block(store))
- return;
- mem = get_irn_n(store, n_ia32_Store_mem);
- if (!is_ia32_NoReg_GP(get_irn_n(store, n_ia32_Store_index))
- || !is_NoMem(mem))
- return;
-
- int incsp_offset = be_get_IncSP_offset(am_base);
- if (incsp_offset <= 0)
- return;
-
- /* we have to be at offset 0 */
- int my_offset = get_ia32_am_offs_int(store);
- if (my_offset != 0) {
- /* TODO here: find out wether there is a store with offset 0 before
- * us and wether we can move it down to our place */
- return;
- }
- ir_mode *ls_mode = get_ia32_ls_mode(store);
- int my_store_size = get_mode_size_bytes(ls_mode);
-
- if (my_offset + my_store_size > incsp_offset)
- return;
-
- /* correctness checking:
- - noone else must write to that stackslot
- (because after translation incsp won't allocate it anymore)
- */
- sched_foreach_reverse_from(store, node) {
- int i, arity;
-
- if (node == am_base)
- break;
-
- /* make sure noone else can use the space on the stack */
- arity = get_irn_arity(node);
- for (i = 0; i < arity; ++i) {
- ir_node *pred = get_irn_n(node, i);
- if (pred != am_base)
- continue;
-
- if (i == n_ia32_base &&
- (get_ia32_op_type(node) == ia32_AddrModeS
- || get_ia32_op_type(node) == ia32_AddrModeD)) {
- int node_offset = get_ia32_am_offs_int(node);
- ir_mode *node_ls_mode = get_ia32_ls_mode(node);
- int node_size = get_mode_size_bytes(node_ls_mode);
- /* overlapping with our position? abort */
- if (node_offset < my_offset + my_store_size
- && node_offset + node_size >= my_offset)
- return;
- /* otherwise it's fine */
- continue;
- }
-
- /* strange use of esp: abort */
- return;
- }
- }
-
- /* all ok, change to push */
- dbgi = get_irn_dbg_info(store);
- block = get_nodes_block(store);
- noreg = ia32_new_NoReg_gp(cg);
- val = get_irn_n(store, n_ia32_Store_val);
-
- push = new_bd_ia32_Push(dbgi, block, noreg, noreg, mem,
-
- create_push(dbgi, current_ir_graph, block, am_base, store);
-}
-#endif
-
/**
* Return true if a mode can be stored in the GP register set
*/
static inline int mode_needs_gp_reg(ir_mode *mode)
{
- if (mode == mode_fpcw)
+ if (mode == ia32_mode_fpcw)
return 0;
if (get_mode_size_bits(mode) > 32)
return 0;
*/
static void peephole_Load_IncSP_to_pop(ir_node *irn)
{
- const arch_register_t *esp = &ia32_gp_regs[REG_ESP];
- int i, maxslot, inc_ofs, ofs;
- ir_node *node, *pred_sp, *block;
+ const arch_register_t *esp = &ia32_registers[REG_ESP];
+ int i, maxslot, ofs;
ir_node *loads[MAXPUSH_OPTIMIZE];
- ir_graph *irg;
unsigned regmask = 0;
unsigned copymask = ~0;
memset(loads, 0, sizeof(loads));
- assert(be_is_IncSP(irn));
- inc_ofs = -be_get_IncSP_offset(irn);
+ int inc_ofs = -be_get_IncSP_offset(irn);
if (inc_ofs < 4)
return;
* attached to the node
*/
maxslot = -1;
- pred_sp = be_get_IncSP_pred(irn);
- for (node = sched_prev(irn); !sched_is_end(node); node = sched_prev(node)) {
+ ir_node *pred_sp = be_get_IncSP_pred(irn);
+ sched_foreach_reverse_before(irn, node) {
int offset;
int loadslot;
const arch_register_t *sreg, *dreg;
if (loads[loadslot] != NULL)
break;
- dreg = arch_irn_get_register(node, pn_ia32_Load_res);
+ dreg = arch_get_irn_register_out(node, pn_ia32_Load_res);
if (regmask & (1 << dreg->index)) {
/* this register is already used */
break;
inc_ofs = (i+1) * 4;
/* create a new IncSP if needed */
- block = get_nodes_block(irn);
- irg = cg->irg;
+ ir_node *const block = get_nodes_block(irn);
if (inc_ofs > 0) {
pred_sp = be_new_IncSP(esp, block, pred_sp, -inc_ofs, be_get_IncSP_align(irn));
sched_add_before(irn, pred_sp);
for (++i; i <= maxslot; ++i) {
ir_node *load = loads[i];
ir_node *mem, *pop;
- const ir_edge_t *edge, *tmp;
const arch_register_t *reg;
mem = get_irn_n(load, n_ia32_mem);
- reg = arch_irn_get_register(load, pn_ia32_Load_res);
+ reg = arch_get_irn_register_out(load, pn_ia32_Load_res);
pop = new_bd_ia32_Pop(get_irn_dbg_info(load), block, mem, pred_sp);
- arch_irn_set_register(pop, pn_ia32_Load_res, reg);
+ arch_set_irn_register_out(pop, pn_ia32_Load_res, reg);
copy_mark(load, pop);
/* create stackpointer Proj */
- pred_sp = new_r_Proj(block, pop, mode_Iu, pn_ia32_Pop_stack);
+ pred_sp = new_r_Proj(pop, mode_Iu, pn_ia32_Pop_stack);
arch_set_irn_register(pred_sp, esp);
sched_add_before(irn, pop);
/* rewire now */
- foreach_out_edge_safe(load, edge, tmp) {
+ foreach_out_edge_safe(load, edge) {
ir_node *proj = get_edge_src_irn(edge);
set_Proj_pred(proj, pop);
/**
* Find a free GP register if possible, else return NULL.
*/
-static const arch_register_t *get_free_gp_reg(void)
+static const arch_register_t *get_free_gp_reg(ir_graph *irg)
{
+ be_irg_t *birg = be_birg_from_irg(irg);
int i;
- for(i = 0; i < N_ia32_gp_REGS; ++i) {
- const arch_register_t *reg = &ia32_gp_regs[i];
- if(arch_register_type_is(reg, ignore))
+ for (i = 0; i < N_ia32_gp_REGS; ++i) {
+ const arch_register_t *reg = &ia32_reg_classes[CLASS_ia32_gp].regs[i];
+ if (!rbitset_is_set(birg->allocatable_regs, reg->global_index))
continue;
- if(be_peephole_get_value(CLASS_ia32_gp, i) == NULL)
- return &ia32_gp_regs[i];
+ if (be_peephole_get_value(reg->global_index) == NULL)
+ return reg;
}
return NULL;
ir_node *stack, ir_node *schedpoint,
const arch_register_t *reg)
{
- const arch_register_t *esp = &ia32_gp_regs[REG_ESP];
+ const arch_register_t *esp = &ia32_registers[REG_ESP];
+ ir_graph *irg = get_irn_irg(block);
ir_node *pop;
ir_node *keep;
ir_node *val;
ir_node *in[1];
- pop = new_bd_ia32_Pop(dbgi, block, new_NoMem(), stack);
+ pop = new_bd_ia32_Pop(dbgi, block, get_irg_no_mem(irg), stack);
- stack = new_r_Proj(block, pop, mode_Iu, pn_ia32_Pop_stack);
+ stack = new_r_Proj(pop, mode_Iu, pn_ia32_Pop_stack);
arch_set_irn_register(stack, esp);
- val = new_r_Proj(block, pop, mode_Iu, pn_ia32_Pop_res);
+ val = new_r_Proj(pop, mode_Iu, pn_ia32_Pop_res);
arch_set_irn_register(val, reg);
sched_add_before(schedpoint, pop);
return stack;
}
-/**
- * Creates a Push instruction before the given schedule point.
- *
- * @param dbgi debug info
- * @param block the block
- * @param stack the previous stack value
- * @param schedpoint the new node is added before this node
- * @param reg the register to pop
- *
- * @return the new stack value
- */
-static ir_node *create_push(dbg_info *dbgi, ir_node *block,
- ir_node *stack, ir_node *schedpoint)
-{
- const arch_register_t *esp = &ia32_gp_regs[REG_ESP];
-
- ir_node *val = ia32_new_Unknown_gp(cg);
- ir_node *noreg = ia32_new_NoReg_gp(cg);
- ir_node *nomem = new_NoMem();
- ir_node *push = new_bd_ia32_Push(dbgi, block, noreg, noreg, nomem, val, stack);
- sched_add_before(schedpoint, push);
-
- stack = new_r_Proj(block, push, mode_Iu, pn_ia32_Push_stack);
- arch_set_irn_register(stack, esp);
-
- return stack;
-}
-
/**
* Optimize an IncSp by replacing it with Push/Pop.
*/
static void peephole_be_IncSP(ir_node *node)
{
- const arch_register_t *esp = &ia32_gp_regs[REG_ESP];
+ const arch_register_t *esp = &ia32_registers[REG_ESP];
const arch_register_t *reg;
dbg_info *dbgi;
ir_node *block;
if (offset < 0) {
/* we need a free register for pop */
- reg = get_free_gp_reg();
+ reg = get_free_gp_reg(get_irn_irg(node));
if (reg == NULL)
return;
dbgi = get_irn_dbg_info(node);
block = get_nodes_block(node);
stack = be_get_IncSP_pred(node);
- stack = create_push(dbgi, block, stack, node);
+ stack = new_bd_ia32_PushEax(dbgi, block, stack);
+ arch_set_irn_register(stack, esp);
+ sched_add_before(node, stack);
if (offset == +8) {
- stack = create_push(dbgi, block, stack, node);
+ stack = new_bd_ia32_PushEax(dbgi, block, stack);
+ arch_set_irn_register(stack, esp);
+ sched_add_before(node, stack);
}
}
const arch_register_t *reg;
ir_node *block;
dbg_info *dbgi;
- ir_node *xor;
+ ir_node *xorn;
/* try to transform a mov 0, reg to xor reg reg */
if (attr->offset != 0 || attr->symconst != NULL)
if (ia32_cg_config.use_mov_0)
return;
/* xor destroys the flags, so no-one must be using them */
- if (be_peephole_get_value(CLASS_ia32_flags, REG_EFLAGS) != NULL)
+ if (be_peephole_get_value(REG_EFLAGS) != NULL)
return;
reg = arch_get_irn_register(node);
/* create xor(produceval, produceval) */
block = get_nodes_block(node);
dbgi = get_irn_dbg_info(node);
- xor = new_bd_ia32_Xor0(dbgi, block);
- arch_set_irn_register(xor, reg);
+ xorn = new_bd_ia32_Xor0(dbgi, block);
+ arch_set_irn_register(xorn, reg);
- sched_add_before(node, xor);
+ sched_add_before(node, xorn);
- copy_mark(node, xor);
- be_peephole_exchange(node, xor);
+ copy_mark(node, xorn);
+ be_peephole_exchange(node, xorn);
}
-static inline int is_noreg(ia32_code_gen_t *cg, const ir_node *node)
+static inline int is_noreg(const ir_node *node)
{
- return node == cg->noreg_gp;
+ return is_ia32_NoReg_GP(node);
}
ir_node *ia32_immediate_from_long(long val)
ir_node *start_block = get_irg_start_block(irg);
ir_node *immediate
= new_bd_ia32_Immediate(NULL, start_block, NULL, 0, 0, val);
- arch_set_irn_register(immediate, &ia32_gp_regs[REG_GP_NOREG]);
+ arch_set_irn_register(immediate, &ia32_registers[REG_GP_NOREG]);
return immediate;
}
res = new_bd_ia32_Immediate(NULL, block, entity, sc_sign, sc_no_pic_adjust,
offset);
- arch_set_irn_register(res, &ia32_gp_regs[REG_GP_NOREG]);
+ arch_set_irn_register(res, &ia32_registers[REG_GP_NOREG]);
return res;
}
dbg_info *dbgi;
ir_node *block;
ir_node *res;
- ir_node *noreg;
- ir_node *nomem;
assert(is_ia32_Lea(node));
/* we can only do this if it is allowed to clobber the flags */
- if(be_peephole_get_value(CLASS_ia32_flags, REG_EFLAGS) != NULL)
+ if (be_peephole_get_value(REG_EFLAGS) != NULL)
return;
base = get_irn_n(node, n_ia32_Lea_base);
index = get_irn_n(node, n_ia32_Lea_index);
- if(is_noreg(cg, base)) {
+ if (is_noreg(base)) {
base = NULL;
base_reg = NULL;
} else {
base_reg = arch_get_irn_register(base);
}
- if(is_noreg(cg, index)) {
+ if (is_noreg(index)) {
index = NULL;
index_reg = NULL;
} else {
index_reg = arch_get_irn_register(index);
}
- if(base == NULL && index == NULL) {
+ if (base == NULL && index == NULL) {
/* we shouldn't construct these in the first place... */
#ifdef DEBUG_libfirm
ir_fprintf(stderr, "Optimisation warning: found immediate only lea\n");
assert(!is_ia32_need_stackent(node) || get_ia32_frame_ent(node) != NULL);
/* check if we have immediates values (frame entities should already be
* expressed in the offsets) */
- if(get_ia32_am_offs_int(node) != 0 || get_ia32_am_sc(node) != NULL) {
+ if (get_ia32_am_offs_int(node) != 0 || get_ia32_am_sc(node) != NULL) {
has_immediates = 1;
} else {
has_immediates = 0;
/* we can transform leas where the out register is the same as either the
* base or index register back to an Add or Shl */
- if(out_reg == base_reg) {
- if(index == NULL) {
+ if (out_reg == base_reg) {
+ if (index == NULL) {
#ifdef DEBUG_libfirm
- if(!has_immediates) {
+ if (!has_immediates) {
ir_fprintf(stderr, "Optimisation warning: found lea which is "
"just a copy\n");
}
op1 = base;
goto make_add_immediate;
}
- if(scale == 0 && !has_immediates) {
+ if (scale == 0 && !has_immediates) {
op1 = base;
op2 = index;
goto make_add;
}
/* can't create an add */
return;
- } else if(out_reg == index_reg) {
- if(base == NULL) {
- if(has_immediates && scale == 0) {
+ } else if (out_reg == index_reg) {
+ if (base == NULL) {
+ if (has_immediates && scale == 0) {
op1 = index;
goto make_add_immediate;
- } else if(!has_immediates && scale > 0) {
+ } else if (!has_immediates && scale > 0) {
op1 = index;
op2 = ia32_immediate_from_long(scale);
goto make_shl;
- } else if(!has_immediates) {
+ } else if (!has_immediates) {
#ifdef DEBUG_libfirm
ir_fprintf(stderr, "Optimisation warning: found lea which is "
"just a copy\n");
#endif
}
- } else if(scale == 0 && !has_immediates) {
+ } else if (scale == 0 && !has_immediates) {
op1 = index;
op2 = base;
goto make_add;
}
make_add_immediate:
- if(ia32_cg_config.use_incdec) {
- if(is_am_one(node)) {
+ if (ia32_cg_config.use_incdec) {
+ if (is_am_one(node)) {
dbgi = get_irn_dbg_info(node);
block = get_nodes_block(node);
res = new_bd_ia32_Inc(dbgi, block, op1);
arch_set_irn_register(res, out_reg);
goto exchange;
}
- if(is_am_minus_one(node)) {
+ if (is_am_minus_one(node)) {
dbgi = get_irn_dbg_info(node);
block = get_nodes_block(node);
res = new_bd_ia32_Dec(dbgi, block, op1);
make_add:
dbgi = get_irn_dbg_info(node);
block = get_nodes_block(node);
- noreg = ia32_new_NoReg_gp(cg);
- nomem = new_NoMem();
+ ir_graph *irg = get_irn_irg(node);
+ ir_node *noreg = ia32_new_NoReg_gp(irg);
+ ir_node *nomem = get_irg_no_mem(irg);
res = new_bd_ia32_Add(dbgi, block, noreg, noreg, nomem, op1, op2);
arch_set_irn_register(res, out_reg);
set_ia32_commutative(res);
make_shl:
dbgi = get_irn_dbg_info(node);
block = get_nodes_block(node);
- noreg = ia32_new_NoReg_gp(cg);
- nomem = new_NoMem();
res = new_bd_ia32_Shl(dbgi, block, op1, op2);
arch_set_irn_register(res, out_reg);
goto exchange;
return;
}
/* we need a free register */
- reg = get_free_gp_reg();
+ reg = get_free_gp_reg(get_irn_irg(imul));
if (reg == NULL)
return;
/* fine, we can rebuild it */
- res = turn_back_am(imul);
+ res = ia32_turn_back_am(imul);
arch_set_irn_register(res, reg);
}
/**
* Replace xorps r,r and xorpd r,r by pxor r,r
*/
-static void peephole_ia32_xZero(ir_node *xor)
+static void peephole_ia32_xZero(ir_node *xorn)
{
- set_irn_op(xor, op_ia32_xPzero);
+ set_irn_op(xorn, op_ia32_xPzero);
}
/**
*/
static void peephole_ia32_Conv_I2I(ir_node *node)
{
- const arch_register_t *eax = &ia32_gp_regs[REG_EAX];
+ const arch_register_t *eax = &ia32_registers[REG_EAX];
ir_mode *smaller_mode = get_ia32_ls_mode(node);
ir_node *val = get_irn_n(node, n_ia32_Conv_I2I_val);
dbg_info *dbgi;
if (get_mode_size_bits(smaller_mode) != 16 ||
!mode_is_signed(smaller_mode) ||
eax != arch_get_irn_register(val) ||
- eax != arch_irn_get_register(node, pn_ia32_Conv_I2I_res))
+ eax != arch_get_irn_register_out(node, pn_ia32_Conv_I2I_res))
return;
dbgi = get_irn_dbg_info(node);
}
/* Perform peephole-optimizations. */
-void ia32_peephole_optimization(ia32_code_gen_t *new_cg)
+void ia32_peephole_optimization(ir_graph *irg)
{
- cg = new_cg;
+ /* we currently do it in 2 passes because:
+ * Lea -> Add could be usefull as flag producer for Test later
+ */
- /* register peephole optimisations */
- clear_irp_opcodes_generic_func();
- register_peephole_optimisation(op_ia32_Const, peephole_ia32_Const);
- register_peephole_optimisation(op_be_IncSP, peephole_be_IncSP);
- register_peephole_optimisation(op_ia32_Lea, peephole_ia32_Lea);
+ /* pass 1 */
+ ir_clear_opcodes_generic_func();
register_peephole_optimisation(op_ia32_Cmp, peephole_ia32_Cmp);
- register_peephole_optimisation(op_ia32_Cmp8Bit, peephole_ia32_Cmp);
- register_peephole_optimisation(op_ia32_Test, peephole_ia32_Test);
- register_peephole_optimisation(op_ia32_Test8Bit, peephole_ia32_Test);
- register_peephole_optimisation(op_be_Return, peephole_ia32_Return);
- if (! ia32_cg_config.use_imul_mem_imm32)
- register_peephole_optimisation(op_ia32_IMul, peephole_ia32_Imul_split);
- if (ia32_cg_config.use_pxor)
- register_peephole_optimisation(op_ia32_xZero, peephole_ia32_xZero);
+ register_peephole_optimisation(op_ia32_Lea, peephole_ia32_Lea);
if (ia32_cg_config.use_short_sex_eax)
register_peephole_optimisation(op_ia32_Conv_I2I, peephole_ia32_Conv_I2I);
-
- be_peephole_opt(cg->birg);
+ if (ia32_cg_config.use_pxor)
+ register_peephole_optimisation(op_ia32_xZero, peephole_ia32_xZero);
+ if (! ia32_cg_config.use_imul_mem_imm32)
+ register_peephole_optimisation(op_ia32_IMul, peephole_ia32_Imul_split);
+ be_peephole_opt(irg);
+
+ /* pass 2 */
+ ir_clear_opcodes_generic_func();
+ register_peephole_optimisation(op_ia32_Const, peephole_ia32_Const);
+ register_peephole_optimisation(op_be_IncSP, peephole_be_IncSP);
+ register_peephole_optimisation(op_ia32_Test, peephole_ia32_Test);
+ register_peephole_optimisation(op_be_Return, peephole_ia32_Return);
+ be_peephole_opt(irg);
}
/**
* Removes node from schedule if it is not used anymore. If irn is a mode_T node
- * all it's Projs are removed as well.
+ * all its Projs are removed as well.
* @param irn The irn to be removed from schedule
*/
static inline void try_kill(ir_node *node)
{
- if(get_irn_mode(node) == mode_T) {
- const ir_edge_t *edge, *next;
- foreach_out_edge_safe(node, edge, next) {
+ if (get_irn_mode(node) == mode_T) {
+ foreach_out_edge_safe(node, edge) {
ir_node *proj = get_edge_src_irn(edge);
try_kill(proj);
}
}
- if(get_irn_n_edges(node) != 0)
+ if (get_irn_n_edges(node) != 0)
return;
if (sched_is_scheduled(node)) {
ir_mode *conv_mode;
ir_mode *store_mode;
- if(!is_ia32_Store(node) && !is_ia32_Store8Bit(node))
+ if (!is_ia32_Store(node))
return;
- assert(n_ia32_Store_val == n_ia32_Store8Bit_val);
pred_proj = get_irn_n(node, n_ia32_Store_val);
- if(is_Proj(pred_proj)) {
+ if (is_Proj(pred_proj)) {
pred = get_Proj_pred(pred_proj);
} else {
pred = pred_proj;
}
- if(!is_ia32_Conv_I2I(pred) && !is_ia32_Conv_I2I8Bit(pred))
+ if (!is_ia32_Conv_I2I(pred))
return;
- if(get_ia32_op_type(pred) != ia32_Normal)
+ if (get_ia32_op_type(pred) != ia32_Normal)
return;
/* the store only stores the lower bits, so we only need the conv
* it it shrinks the mode */
conv_mode = get_ia32_ls_mode(pred);
store_mode = get_ia32_ls_mode(node);
- if(get_mode_size_bits(conv_mode) < get_mode_size_bits(store_mode))
+ if (get_mode_size_bits(conv_mode) < get_mode_size_bits(store_mode))
return;
+ ir_fprintf(stderr, "Optimisation warning: unoptimized ia32 Store(Conv) (%+F, %+F)\n", node, pred);
set_irn_n(node, n_ia32_Store_val, get_irn_n(pred, n_ia32_Conv_I2I_val));
- if(get_irn_n_edges(pred_proj) == 0) {
+ if (get_irn_n_edges(pred_proj) == 0) {
kill_node(pred_proj);
- if(pred != pred_proj)
+ if (pred != pred_proj)
kill_node(pred);
}
}
ir_mode *load_mode;
ir_mode *conv_mode;
- if (!is_ia32_Conv_I2I(node) && !is_ia32_Conv_I2I8Bit(node))
+ if (!is_ia32_Conv_I2I(node))
return;
- assert(n_ia32_Conv_I2I_val == n_ia32_Conv_I2I8Bit_val);
pred = get_irn_n(node, n_ia32_Conv_I2I_val);
- if(!is_Proj(pred))
+ if (!is_Proj(pred))
return;
predpred = get_Proj_pred(pred);
- if(!is_ia32_Load(predpred))
+ if (!is_ia32_Load(predpred))
return;
/* the load is sign extending the upper bits, so we only need the conv
* if it shrinks the mode */
load_mode = get_ia32_ls_mode(predpred);
conv_mode = get_ia32_ls_mode(node);
- if(get_mode_size_bits(conv_mode) < get_mode_size_bits(load_mode))
+ if (get_mode_size_bits(conv_mode) < get_mode_size_bits(load_mode))
return;
- if(get_mode_sign(conv_mode) != get_mode_sign(load_mode)) {
+ if (get_mode_sign(conv_mode) != get_mode_sign(load_mode)) {
/* change the load if it has only 1 user */
- if(get_irn_n_edges(pred) == 1) {
+ if (get_irn_n_edges(pred) == 1) {
ir_mode *newmode;
- if(get_mode_sign(conv_mode)) {
+ if (get_mode_sign(conv_mode)) {
newmode = find_signed_mode(load_mode);
} else {
newmode = find_unsigned_mode(load_mode);
}
/* kill the conv */
+ ir_fprintf(stderr, "Optimisation warning: unoptimized ia32 Conv(Load) (%+F, %+F)\n", node, predpred);
exchange(node, pred);
}
int conv_mode_bits;
int pred_mode_bits;
- if (!is_ia32_Conv_I2I(node) && !is_ia32_Conv_I2I8Bit(node))
+ if (!is_ia32_Conv_I2I(node))
return;
- assert(n_ia32_Conv_I2I_val == n_ia32_Conv_I2I8Bit_val);
pred_proj = get_irn_n(node, n_ia32_Conv_I2I_val);
- if(is_Proj(pred_proj))
+ if (is_Proj(pred_proj))
pred = get_Proj_pred(pred_proj);
else
pred = pred_proj;
- if(!is_ia32_Conv_I2I(pred) && !is_ia32_Conv_I2I8Bit(pred))
+ if (!is_ia32_Conv_I2I(pred))
return;
/* we know that after a conv, the upper bits are sign extended
pred_mode = get_ia32_ls_mode(pred);
pred_mode_bits = get_mode_size_bits(pred_mode);
- if(conv_mode_bits == pred_mode_bits
+ if (conv_mode_bits == pred_mode_bits
&& get_mode_sign(conv_mode) == get_mode_sign(pred_mode)) {
result_conv = pred_proj;
- } else if(conv_mode_bits <= pred_mode_bits) {
+ } else if (conv_mode_bits <= pred_mode_bits) {
/* if 2nd conv is smaller then first conv, then we can always take the
* 2nd conv */
- if(get_irn_n_edges(pred_proj) == 1) {
+ if (get_irn_n_edges(pred_proj) == 1) {
result_conv = pred_proj;
set_ia32_ls_mode(pred, conv_mode);
/* Argh:We must change the opcode to 8bit AND copy the register constraints */
if (get_mode_size_bits(conv_mode) == 8) {
- set_irn_op(pred, op_ia32_Conv_I2I8Bit);
- set_ia32_in_req_all(pred, get_ia32_in_req_all(node));
+ const arch_register_req_t **reqs = arch_get_irn_register_reqs_in(node);
+ set_irn_op(pred, op_ia32_Conv_I2I);
+ arch_set_irn_register_reqs_in(pred, reqs);
}
} else {
/* we don't want to end up with 2 loads, so we better do nothing */
- if(get_irn_mode(pred) == mode_T) {
+ if (get_irn_mode(pred) == mode_T) {
return;
}
/* Argh:We must change the opcode to 8bit AND copy the register constraints */
if (get_mode_size_bits(conv_mode) == 8) {
- set_irn_op(result_conv, op_ia32_Conv_I2I8Bit);
- set_ia32_in_req_all(result_conv, get_ia32_in_req_all(node));
+ const arch_register_req_t **reqs = arch_get_irn_register_reqs_in(node);
+ set_irn_op(result_conv, op_ia32_Conv_I2I);
+ arch_set_irn_register_reqs_in(result_conv, reqs);
}
}
} else {
/* if both convs have the same sign, then we can take the smaller one */
- if(get_mode_sign(conv_mode) == get_mode_sign(pred_mode)) {
+ if (get_mode_sign(conv_mode) == get_mode_sign(pred_mode)) {
result_conv = pred_proj;
} else {
/* no optimisation possible if smaller conv is sign-extend */
- if(mode_is_signed(pred_mode)) {
+ if (mode_is_signed(pred_mode)) {
return;
}
/* we can take the smaller conv if it is unsigned */
}
}
+ ir_fprintf(stderr, "Optimisation warning: unoptimized ia32 Conv(Conv) (%+F, %+F)\n", node, pred);
/* Some user (like Phis) won't be happy if we change the mode. */
set_irn_mode(result_conv, get_irn_mode(node));
/* kill the conv */
exchange(node, result_conv);
- if(get_irn_n_edges(pred_proj) == 0) {
+ if (get_irn_n_edges(pred_proj) == 0) {
kill_node(pred_proj);
- if(pred != pred_proj)
+ if (pred != pred_proj)
kill_node(pred);
}
optimize_conv_conv(result_conv);
/**
* Performs conv and address mode optimization.
*/
-void ia32_optimize_graph(ia32_code_gen_t *cg)
+void ia32_optimize_graph(ir_graph *irg)
{
- irg_walk_blkwise_graph(cg->irg, NULL, optimize_node, cg);
-
- if (cg->dump)
- be_dump(cg->irg, "-opt", dump_ir_block_graph_sched);
+ irg_walk_blkwise_graph(irg, NULL, optimize_node, NULL);
}
void ia32_init_optimize(void)
projects / libfirm / blobdiff