#include <mono/metadata/opcodes.h>
#include "mini.h"
+/* FIXME: Get rid of these */
+#define NEW_BIALU(cfg,dest,op,dr,sr1,sr2) do { \
+ MONO_INST_NEW ((cfg), (dest), (op)); \
+ (dest)->dreg = (dr); \
+ (dest)->sreg1 = (sr1); \
+ (dest)->sreg2 = (sr2); \
+ } while (0)
+
+#define NEW_BIALU_IMM(cfg,dest,op,dr,sr,imm) do { \
+ MONO_INST_NEW ((cfg), (dest), (op)); \
+ (dest)->dreg = (dr); \
+ (dest)->sreg1 = (sr); \
+ (dest)->inst_p1 = (gpointer)(gssize)(imm); \
+ } while (0)
+
+#ifndef MONO_ARCH_IS_OP_MEMBASE
+#define MONO_ARCH_IS_OP_MEMBASE(opcode) FALSE
+#endif
#define MONO_DEBUG_LOCAL_PROP 0
#define MONO_DEBUG_TREE_MOVER 0
*tree = *cp;
}
} else {
- if ((tree->inst_i0->inst_vtype->type == cp->inst_vtype->type) ||
+ MonoType *inst_i0_underlying_type = mono_type_get_underlying_type (tree->inst_i0->inst_vtype);
+ MonoType *cp_underlying_type = mono_type_get_underlying_type (cp->inst_vtype);
+ if ((inst_i0_underlying_type->type == cp_underlying_type->type) ||
(tree->type == STACK_OBJ) || (tree->type == STACK_MP)) {
if (cfg->opt & MONO_OPT_COPYPROP) {
//{ static int c = 0; printf ("VCOPY %d\n", ++c); }
}
break;
- case CEE_CALL:
+ case OP_CALL:
case OP_CALL_REG:
- case CEE_CALLVIRT:
+ case OP_CALLVIRT:
case OP_LCALL_REG:
case OP_LCALLVIRT:
case OP_LCALL:
case OP_VCALL:
case OP_VOIDCALL_REG:
case OP_VOIDCALLVIRT:
- case OP_VOIDCALL: {
+ case OP_VOIDCALL:
+ case OP_TRAMPCALL_VTABLE:
+ case OP_CALL_RGCTX:
+ case OP_FCALL_RGCTX:
+ case OP_VOIDCALL_RGCTX:
+ case OP_LCALL_RGCTX:
+ case OP_VCALL_RGCTX:
+ case OP_CALL_REG_RGCTX:
+ case OP_FCALL_REG_RGCTX:
+ case OP_VOIDCALL_REG_RGCTX:
+ case OP_LCALL_REG_RGCTX:
+ case OP_VCALL_REG_RGCTX:
+ case OP_CALLVIRT_IMT:
+ case OP_VOIDCALLVIRT_IMT:
+ case OP_FCALLVIRT_IMT:
+ case OP_LCALLVIRT_IMT:
+ case OP_VCALLVIRT_IMT: {
MonoCallInst *call = (MonoCallInst *)tree;
MonoMethodSignature *sig = call->signature;
int i, byref = FALSE;
printf ("Running tree mover on BB%d\n", bb->block_num);
}
}
- for (; tree; tree = tree->next) {
+ MONO_BB_FOR_EACH_INS (bb, tree) {
if (tree_mover != NULL) {
if (MONO_DEBUG_TREE_MOVER) {
printf ("Running tree mover on tree ");
acp [tree->inst_i0->inst_c0] = NULL;
if (MONO_DEBUG_TREE_MOVER) {
- printf ("Assignment clears ACP[%d] at tree ", tree->inst_i0->inst_c0);
+ printf ("Assignment clears ACP[%d] at tree ", (int)tree->inst_i0->inst_c0);
mono_print_tree (tree);
printf ("\n");
}
acp [tree->inst_i0->inst_c0] = i1;
tree_can_be_moved = FALSE;
if (MONO_DEBUG_LOCAL_PROP) {
- printf (" Consequently, ACP[%d] becomes constant ", tree->inst_i0->inst_c0);
+ printf (" Consequently, ACP[%ld] becomes constant ", (long)tree->inst_i0->inst_c0);
mono_print_tree (i1);
printf ("\n");
}
acp [tree->inst_i0->inst_c0] = i1->inst_i0;
tree_can_be_moved = FALSE;
if (MONO_DEBUG_LOCAL_PROP) {
- printf (" Consequently, ACP[%d] becomes local ", tree->inst_i0->inst_c0);
+ printf (" Consequently, ACP[%d] becomes local ", (int)tree->inst_i0->inst_c0);
mono_print_tree (i1->inst_i0);
printf ("\n");
}
if (tree->inst_i0->inst_i0->opcode == OP_ICONST &&
tree->inst_i0->inst_i1->opcode == OP_ICONST) {
- tree->opcode = CEE_BR;
+ tree->opcode = OP_BR;
if (tree->inst_i0->inst_i0->opcode == tree->inst_i0->inst_i1->opcode) {
tree->inst_target_bb = tree->inst_true_bb;
} else {
}
/* All tests passed, apply move */
*(move->use) = move->definition->inst_i1;
- move->definition->opcode = CEE_NOP;
+ move->definition->opcode = OP_NOP;
move->definition->ssa_op = MONO_SSA_NOP;
/* Then disable moves affected by this move */
printf (" Consequently, kill dependent definition %d: ", tree_mover_slot_to_index (tree_mover, dependency->defined_slot));
mono_print_tree_nl (dependency->dead_definition);
}
- dependency->dead_definition->opcode = CEE_NOP;
+ dependency->dead_definition->opcode = OP_NOP;
dependency->dead_definition->ssa_op = MONO_SSA_NOP;
}
}
TreeMoverTreeMove *move;
/* Move the movable trees */
if (MONO_DEBUG_TREE_MOVER) {
- printf ("BEFORE TREE MOVER START\n");
- mono_print_code (cfg);
- printf ("BEFORE TREE MOVER END\n");
+ mono_print_code (cfg, "BEFORE TREE MOVER");
printf ("Applying tree mover...\n");
}
for (move = tree_mover->scheduled_moves; move != NULL; move = move->next) {
apply_tree_mover (tree_mover, move);
}
if (MONO_DEBUG_TREE_MOVER) {
- printf ("AFTER TREE MOVER START\n");
- mono_print_code (cfg);
- printf ("AFTER TREE MOVER END\n");
+ mono_print_code (cfg, "AFTER TREE MOVER");
}
/* Global cleanup of tree mover memory */
mono_mempool_destroy(tree_mover->pool);
}
}
+
+static inline MonoBitSet*
+mono_bitset_mp_new_noinit (MonoMemPool *mp, guint32 max_size)
+{
+ int size = mono_bitset_alloc_size (max_size, 0);
+ gpointer mem;
+
+ mem = mono_mempool_alloc (mp, size);
+ return mono_bitset_mem_new (mem, max_size, MONO_BITSET_DONT_FREE);
+}
+
+/*
+ * mono_local_cprop2:
+ *
+ * A combined local copy and constant propagation pass.
+ */
+void
+mono_local_cprop2 (MonoCompile *cfg)
+{
+ MonoBasicBlock *bb;
+ MonoInst **defs;
+ gint32 *def_index;
+ int max;
+
+restart:
+
+ max = cfg->next_vreg;
+ defs = mono_mempool_alloc (cfg->mempool, sizeof (MonoInst*) * (cfg->next_vreg + 1));
+ def_index = mono_mempool_alloc (cfg->mempool, sizeof (guint32) * (cfg->next_vreg + 1));
+
+ for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
+ MonoInst *ins;
+ int ins_index;
+ int last_call_index;
+
+ /* Manually init the defs entries used by the bblock */
+ MONO_BB_FOR_EACH_INS (bb, ins) {
+ if ((ins->dreg != -1) && (ins->dreg < max)) {
+ defs [ins->dreg] = NULL;
+#if SIZEOF_VOID_P == 4
+ defs [ins->dreg + 1] = NULL;
+#endif
+ }
+ if ((ins->sreg1 != -1) && (ins->sreg1 < max)) {
+ defs [ins->sreg1] = NULL;
+#if SIZEOF_VOID_P == 4
+ defs [ins->sreg1 + 1] = NULL;
+#endif
+ }
+ if ((ins->sreg2 != -1) && (ins->sreg2 < max)) {
+ defs [ins->sreg2] = NULL;
+#if SIZEOF_VOID_P == 4
+ defs [ins->sreg2 + 1] = NULL;
+#endif
+ }
+ }
+
+ ins_index = 0;
+ last_call_index = -1;
+ MONO_BB_FOR_EACH_INS (bb, ins) {
+ const char *spec = INS_INFO (ins->opcode);
+ int regtype, srcindex, sreg;
+
+ if (ins->opcode == OP_NOP) {
+ MONO_DELETE_INS (bb, ins);
+ continue;
+ }
+
+ g_assert (ins->opcode > MONO_CEE_LAST);
+
+ /* FIXME: Optimize this */
+ if (ins->opcode == OP_LDADDR) {
+ MonoInst *var = ins->inst_p0;
+
+ defs [var->dreg] = NULL;
+ /*
+ if (!MONO_TYPE_ISSTRUCT (var->inst_vtype))
+ break;
+ */
+ }
+
+ if (MONO_IS_STORE_MEMBASE (ins)) {
+ sreg = ins->dreg;
+ regtype = 'i';
+
+ if ((regtype == 'i') && (sreg != -1) && defs [sreg]) {
+ MonoInst *def = defs [sreg];
+
+ if ((def->opcode == OP_MOVE) && (!defs [def->sreg1] || (def_index [def->sreg1] < def_index [sreg])) && !vreg_is_volatile (cfg, def->sreg1)) {
+ int vreg = def->sreg1;
+ //printf ("CCOPY: R%d -> R%d\n", sreg, vreg);
+ ins->dreg = vreg;
+ }
+ }
+ }
+
+ for (srcindex = 0; srcindex < 2; ++srcindex) {
+ MonoInst *def;
+
+ regtype = srcindex == 0 ? spec [MONO_INST_SRC1] : spec [MONO_INST_SRC2];
+ sreg = srcindex == 0 ? ins->sreg1 : ins->sreg2;
+
+ if ((regtype == ' ') || (sreg == -1) || (!defs [sreg]))
+ continue;
+
+ def = defs [sreg];
+
+ /* Copy propagation */
+ /*
+ * The first check makes sure the source of the copy did not change since
+ * the copy was made.
+ * The second check avoids volatile variables.
+ * The third check avoids copy propagating local vregs through a call,
+ * since the lvreg will be spilled
+ * The fourth check avoids copy propagating a vreg in cases where
+ * it would be eliminated anyway by reverse copy propagation later,
+ * because propagating it would create another use for it, thus making
+ * it impossible to use reverse copy propagation.
+ */
+ /* Enabling this for floats trips up the fp stack */
+ /*
+ * Enabling this for floats on amd64 seems to cause a failure in
+ * basic-math.cs, most likely because it gets rid of some r8->r4
+ * conversions.
+ */
+ if (MONO_IS_MOVE (def) &&
+ (!defs [def->sreg1] || (def_index [def->sreg1] < def_index [sreg])) &&
+ !vreg_is_volatile (cfg, def->sreg1) &&
+ /* This avoids propagating local vregs across calls */
+ ((get_vreg_to_inst (cfg, def->sreg1) || !defs [def->sreg1] || (def_index [def->sreg1] >= last_call_index) || (def->opcode == OP_VMOVE))) &&
+ !(defs [def->sreg1] && defs [def->sreg1]->next == def) &&
+ (!MONO_ARCH_USE_FPSTACK || (def->opcode != OP_FMOVE)) &&
+ (def->opcode != OP_FMOVE)) {
+ int vreg = def->sreg1;
+
+ //printf ("CCOPY: R%d -> R%d\n", sreg, vreg);
+ if (srcindex == 0)
+ ins->sreg1 = vreg;
+ else
+ ins->sreg2 = vreg;
+
+ /* Allow further iterations */
+ srcindex = -1;
+ continue;
+ }
+
+ /* Constant propagation */
+ /* FIXME: Make is_inst_imm a macro */
+ /* FIXME: Make is_inst_imm take an opcode argument */
+ /* is_inst_imm is only needed for binops */
+ if ((((def->opcode == OP_ICONST) || ((sizeof (gpointer) == 8) && (def->opcode == OP_I8CONST))) &&
+ (((srcindex == 0) && (ins->sreg2 == -1)) || mono_arch_is_inst_imm (def->inst_c0))) ||
+ (!MONO_ARCH_USE_FPSTACK && (def->opcode == OP_R8CONST))) {
+ guint32 opcode2;
+
+ /* srcindex == 1 -> binop, ins->sreg2 == -1 -> unop */
+ if ((srcindex == 1) && (ins->sreg1 != -1) && defs [ins->sreg1] && (defs [ins->sreg1]->opcode == OP_ICONST) && defs [ins->sreg2]) {
+ /* Both arguments are constants, perform cfold */
+ mono_constant_fold_ins2 (cfg, ins, defs [ins->sreg1], defs [ins->sreg2], TRUE);
+ } else if ((srcindex == 0) && (ins->sreg2 != -1) && defs [ins->sreg2]) {
+ /* Arg 1 is constant, swap arguments if possible */
+ int opcode = ins->opcode;
+ mono_constant_fold_ins2 (cfg, ins, defs [ins->sreg1], defs [ins->sreg2], TRUE);
+ if (ins->opcode != opcode) {
+ /* Allow further iterations */
+ srcindex = -1;
+ continue;
+ }
+ } else if ((srcindex == 0) && (ins->sreg2 == -1)) {
+ /* Constant unop, perform cfold */
+ mono_constant_fold_ins2 (cfg, ins, defs [ins->sreg1], NULL, TRUE);
+ }
+
+ opcode2 = mono_op_to_op_imm (ins->opcode);
+ if ((opcode2 != -1) && mono_arch_is_inst_imm (def->inst_c0) && ((srcindex == 1) || (ins->sreg2 == -1))) {
+ ins->opcode = opcode2;
+ if ((def->opcode == OP_I8CONST) && (sizeof (gpointer) == 4)) {
+ ins->inst_ls_word = def->inst_ls_word;
+ ins->inst_ms_word = def->inst_ms_word;
+ } else {
+ ins->inst_imm = def->inst_c0;
+ }
+ if (srcindex == 0)
+ ins->sreg1 = -1;
+ else
+ ins->sreg2 = -1;
+
+ if ((opcode2 == OP_VOIDCALL) || (opcode2 == OP_CALL) || (opcode2 == OP_LCALL) || (opcode2 == OP_FCALL))
+ ((MonoCallInst*)ins)->fptr = (gpointer)ins->inst_imm;
+
+ /* Allow further iterations */
+ srcindex = -1;
+ continue;
+ }
+ else {
+ /* Special cases */
+#if defined(__i386__) || defined(__x86_64__)
+ if ((ins->opcode == OP_X86_LEA) && (srcindex == 1)) {
+#if SIZEOF_VOID_P == 8
+ /* FIXME: Use OP_PADD_IMM when the new JIT is done */
+ ins->opcode = OP_LADD_IMM;
+#else
+ ins->opcode = OP_ADD_IMM;
+#endif
+ ins->inst_imm += def->inst_c0 << ins->backend.shift_amount;
+ ins->sreg2 = -1;
+ }
+#endif
+ opcode2 = mono_load_membase_to_load_mem (ins->opcode);
+ if ((srcindex == 0) && (opcode2 != -1) && mono_arch_is_inst_imm (def->inst_c0)) {
+ ins->opcode = opcode2;
+ ins->inst_imm = def->inst_c0 + ins->inst_offset;
+ ins->sreg1 = -1;
+ }
+ }
+ }
+ else if (((def->opcode == OP_ADD_IMM) || (def->opcode == OP_LADD_IMM)) && (MONO_IS_LOAD_MEMBASE (ins) || MONO_ARCH_IS_OP_MEMBASE (ins->opcode))) {
+ /* ADD_IMM is created by spill_global_vars */
+ /*
+ * We have to guarantee that def->sreg1 haven't changed since def->dreg
+ * was defined. cfg->frame_reg is assumed to remain constant.
+ */
+ if ((def->sreg1 == cfg->frame_reg) || ((def->next == ins) && (def->dreg != def->sreg1))) {
+ ins->inst_basereg = def->sreg1;
+ ins->inst_offset += def->inst_imm;
+ }
+ } else if ((ins->opcode == OP_ISUB_IMM) && (def->opcode == OP_IADD_IMM) && (def->next == ins)) {
+ ins->sreg1 = def->sreg1;
+ ins->inst_imm -= def->inst_imm;
+ } else if ((ins->opcode == OP_IADD_IMM) && (def->opcode == OP_ISUB_IMM) && (def->next == ins)) {
+ ins->sreg1 = def->sreg1;
+ ins->inst_imm -= def->inst_imm;
+ } else if (ins->opcode == OP_STOREI1_MEMBASE_REG &&
+ (def->opcode == OP_ICONV_TO_U1 || def->opcode == OP_ICONV_TO_I1 || def->opcode == OP_SEXT_I4 || (SIZEOF_VOID_P == 8 && def->opcode == OP_LCONV_TO_U1)) &&
+ (!defs [def->sreg1] || (def_index [def->sreg1] < def_index [sreg]))) {
+ /* Avoid needless sign extension */
+ ins->sreg1 = def->sreg1;
+ } else if (ins->opcode == OP_STOREI2_MEMBASE_REG &&
+ (def->opcode == OP_ICONV_TO_U2 || def->opcode == OP_ICONV_TO_I2 || def->opcode == OP_SEXT_I4 || (SIZEOF_VOID_P == 8 && def->opcode == OP_LCONV_TO_I2)) &&
+ (!defs [def->sreg1] || (def_index [def->sreg1] < def_index [sreg]))) {
+ /* Avoid needless sign extension */
+ ins->sreg1 = def->sreg1;
+ }
+ }
+
+ /* Do strength reduction here */
+ /* FIXME: Add long/float */
+ switch (ins->opcode) {
+ case OP_MOVE:
+ if (ins->dreg == ins->sreg1) {
+ MONO_DELETE_INS (bb, ins);
+ spec = INS_INFO (ins->opcode);
+ }
+ break;
+ case OP_ADD_IMM:
+ case OP_IADD_IMM:
+ case OP_SUB_IMM:
+ case OP_ISUB_IMM:
+#if SIZEOF_VOID_P == 8
+ case OP_LADD_IMM:
+ case OP_LSUB_IMM:
+#endif
+ if (ins->inst_imm == 0) {
+ ins->opcode = OP_MOVE;
+ spec = INS_INFO (ins->opcode);
+ }
+ break;
+ case OP_MUL_IMM:
+ case OP_IMUL_IMM:
+#if SIZEOF_VOID_P == 8
+ case OP_LMUL_IMM:
+#endif
+ if (ins->inst_imm == 0) {
+ ins->opcode = (ins->opcode == OP_LMUL_IMM) ? OP_I8CONST : OP_ICONST;
+ ins->inst_c0 = 0;
+ ins->sreg1 = -1;
+ } else if (ins->inst_imm == 1) {
+ ins->opcode = OP_MOVE;
+ } else if ((ins->opcode == OP_IMUL_IMM) && (ins->inst_imm == -1)) {
+ ins->opcode = OP_INEG;
+ } else if ((ins->opcode == OP_LMUL_IMM) && (ins->inst_imm == -1)) {
+ ins->opcode = OP_LNEG;
+ } else {
+ int power2 = mono_is_power_of_two (ins->inst_imm);
+ if (power2 >= 0) {
+ ins->opcode = (ins->opcode == OP_MUL_IMM) ? OP_SHL_IMM : ((ins->opcode == OP_LMUL_IMM) ? OP_LSHL_IMM : OP_ISHL_IMM);
+ ins->inst_imm = power2;
+ }
+ }
+ spec = INS_INFO (ins->opcode);
+ break;
+ case OP_IREM_UN_IMM:
+ case OP_IDIV_UN_IMM: {
+ int c = ins->inst_imm;
+ int power2 = mono_is_power_of_two (c);
+
+ if (power2 >= 0) {
+ if (ins->opcode == OP_IREM_UN_IMM) {
+ ins->opcode = OP_IAND_IMM;
+ ins->sreg2 = -1;
+ ins->inst_imm = (1 << power2) - 1;
+ } else if (ins->opcode == OP_IDIV_UN_IMM) {
+ ins->opcode = OP_ISHR_UN_IMM;
+ ins->sreg2 = -1;
+ ins->inst_imm = power2;
+ }
+ }
+ spec = INS_INFO (ins->opcode);
+ break;
+ }
+ case OP_IDIV_IMM: {
+ int c = ins->inst_imm;
+ int power2 = mono_is_power_of_two (c);
+ MonoInst *tmp1, *tmp2, *tmp3, *tmp4;
+
+ /* FIXME: Move this elsewhere cause its hard to implement it here */
+ if (power2 == 1) {
+ int r1 = mono_alloc_ireg (cfg);
+
+ NEW_BIALU_IMM (cfg, tmp1, OP_ISHR_UN_IMM, r1, ins->sreg1, 31);
+ mono_bblock_insert_after_ins (bb, ins, tmp1);
+ NEW_BIALU (cfg, tmp2, OP_IADD, r1, r1, ins->sreg1);
+ mono_bblock_insert_after_ins (bb, tmp1, tmp2);
+ NEW_BIALU_IMM (cfg, tmp3, OP_ISHR_IMM, ins->dreg, r1, 1);
+ mono_bblock_insert_after_ins (bb, tmp2, tmp3);
+
+ NULLIFY_INS (ins);
+
+ // We allocated a new vreg, so need to restart
+ goto restart;
+ } else if (power2 > 0) {
+ int r1 = mono_alloc_ireg (cfg);
+
+ NEW_BIALU_IMM (cfg, tmp1, OP_ISHR_IMM, r1, ins->sreg1, 31);
+ mono_bblock_insert_after_ins (bb, ins, tmp1);
+ NEW_BIALU_IMM (cfg, tmp2, OP_ISHR_UN_IMM, r1, r1, (32 - power2));
+ mono_bblock_insert_after_ins (bb, tmp1, tmp2);
+ NEW_BIALU (cfg, tmp3, OP_IADD, r1, r1, ins->sreg1);
+ mono_bblock_insert_after_ins (bb, tmp2, tmp3);
+ NEW_BIALU_IMM (cfg, tmp4, OP_ISHR_IMM, ins->dreg, r1, power2);
+ mono_bblock_insert_after_ins (bb, tmp3, tmp4);
+
+ NULLIFY_INS (ins);
+
+ // We allocated a new vreg, so need to restart
+ goto restart;
+ }
+ break;
+ }
+ }
+
+ if (spec [MONO_INST_DEST] != ' ') {
+ MonoInst *def = defs [ins->dreg];
+
+ if (def && (def->opcode == OP_ADD_IMM) && (def->sreg1 == cfg->frame_reg) && (MONO_IS_STORE_MEMBASE (ins))) {
+ /* ADD_IMM is created by spill_global_vars */
+ /* cfg->frame_reg is assumed to remain constant */
+ ins->inst_destbasereg = def->sreg1;
+ ins->inst_offset += def->inst_imm;
+ }
+ }
+
+ if ((spec [MONO_INST_DEST] != ' ') && !MONO_IS_STORE_MEMBASE (ins) && !vreg_is_volatile (cfg, ins->dreg)) {
+ defs [ins->dreg] = ins;
+ def_index [ins->dreg] = ins_index;
+ }
+
+ if (MONO_IS_CALL (ins))
+ last_call_index = ins_index;
+
+ ins_index ++;
+ }
+ }
+}
+
+/**
+ * mono_local_deadce:
+ *
+ * Get rid of the dead assignments to local vregs like the ones created by the
+ * copyprop pass.
+ */
+void
+mono_local_deadce (MonoCompile *cfg)
+{
+ MonoBasicBlock *bb;
+ MonoInst *ins, *prev;
+ MonoBitSet *used, *defined;
+
+ //mono_print_code (cfg, "BEFORE LOCAL-DEADCE");
+
+ /*
+ * Assignments to global vregs can't be eliminated so this pass must come
+ * after the handle_global_vregs () pass.
+ */
+
+ used = mono_bitset_mp_new_noinit (cfg->mempool, cfg->next_vreg + 1);
+ defined = mono_bitset_mp_new_noinit (cfg->mempool, cfg->next_vreg + 1);
+
+ /* First pass: collect liveness info */
+ for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
+ /* Manually init the defs entries used by the bblock */
+ MONO_BB_FOR_EACH_INS (bb, ins) {
+ const char *spec = INS_INFO (ins->opcode);
+
+ if (spec [MONO_INST_DEST] != ' ') {
+ mono_bitset_clear_fast (used, ins->dreg);
+ mono_bitset_clear_fast (defined, ins->dreg);
+#if SIZEOF_VOID_P == 4
+ /* Regpairs */
+ mono_bitset_clear_fast (used, ins->dreg + 1);
+ mono_bitset_clear_fast (defined, ins->dreg + 1);
+#endif
+ }
+ if (spec [MONO_INST_SRC1] != ' ') {
+ mono_bitset_clear_fast (used, ins->sreg1);
+#if SIZEOF_VOID_P == 4
+ mono_bitset_clear_fast (used, ins->sreg1 + 1);
+#endif
+ }
+ if (spec [MONO_INST_SRC2] != ' ') {
+ mono_bitset_clear_fast (used, ins->sreg2);
+#if SIZEOF_VOID_P == 4
+ mono_bitset_clear_fast (used, ins->sreg2 + 1);
+#endif
+ }
+ }
+
+ /*
+ * Make a reverse pass over the instruction list
+ */
+ MONO_BB_FOR_EACH_INS_REVERSE_SAFE (bb, prev, ins) {
+ const char *spec = INS_INFO (ins->opcode);
+
+ if (ins->opcode == OP_NOP) {
+ MONO_DELETE_INS (bb, ins);
+ continue;
+ }
+
+ g_assert (ins->opcode > MONO_CEE_LAST);
+
+ if (((ins->opcode == OP_MOVE) || (ins->opcode == OP_VMOVE)) && ins->prev) {
+ MonoInst *def;
+ const char *spec2;
+
+ def = ins->prev;
+ while (def->prev && (def->opcode == OP_NOP))
+ def = def->prev;
+ spec2 = INS_INFO (def->opcode);
+
+ /*
+ * Perform a limited kind of reverse copy propagation, i.e.
+ * transform B <- FOO; A <- B into A <- FOO
+ * This isn't copyprop, not deadce, but it can only be performed
+ * after handle_global_vregs () has run.
+ */
+ if (!get_vreg_to_inst (cfg, ins->sreg1) && (spec2 [MONO_INST_DEST] != ' ') && (def->dreg == ins->sreg1) && !mono_bitset_test_fast (used, ins->sreg1) && !MONO_IS_STORE_MEMBASE (def) && ((spec [MONO_INST_DEST] == 'f' && ins->sreg1 > MONO_MAX_FREGS) || (spec [MONO_INST_DEST] == 'i' && ins->sreg1 > MONO_MAX_IREGS) || (spec [MONO_INST_DEST] == 'v'))) {
+ if (cfg->verbose_level > 2) {
+ printf ("\tReverse copyprop in BB%d on ", bb->block_num);
+ mono_print_ins (ins);
+ }
+
+ def->dreg = ins->dreg;
+ MONO_DELETE_INS (bb, ins);
+ spec = INS_INFO (ins->opcode);
+ }
+ }
+
+ /* Enabling this on x86 could screw up the fp stack */
+ if (((spec [MONO_INST_DEST] == 'i') && (ins->dreg >= MONO_MAX_IREGS)) ||
+ ((spec [MONO_INST_DEST] == 'f') && (ins->dreg >= MONO_MAX_FREGS) && !MONO_ARCH_USE_FPSTACK) ||
+ (spec [MONO_INST_DEST] == 'v')) {
+ /*
+ * Assignments to global vregs can only be eliminated if there is another
+ * assignment to the same vreg later in the same bblock.
+ */
+ if (!mono_bitset_test_fast (used, ins->dreg) &&
+ (!get_vreg_to_inst (cfg, ins->dreg) || (!bb->extended && !vreg_is_volatile (cfg, ins->dreg) && mono_bitset_test_fast (defined, ins->dreg))) &&
+ MONO_INS_HAS_NO_SIDE_EFFECT (ins)) {
+ /* Happens with CMOV instructions */
+ if (ins->prev && ins->prev->opcode == OP_ICOMPARE_IMM) {
+ MonoInst *prev = ins->prev;
+ MONO_DELETE_INS (bb, prev);
+ }
+ //printf ("DEADCE: "); mono_print_ins (ins);
+ MONO_DELETE_INS (bb, ins);
+ spec = INS_INFO (ins->opcode);
+ }
+
+ if (spec [MONO_INST_DEST] != ' ')
+ mono_bitset_clear_fast (used, ins->dreg);
+ }
+
+ if (spec [MONO_INST_DEST] != ' ')
+ mono_bitset_set_fast (defined, ins->dreg);
+ if (spec [MONO_INST_SRC1] != ' ')
+ mono_bitset_set_fast (used, ins->sreg1);
+ if (spec [MONO_INST_SRC2] != ' ')
+ mono_bitset_set_fast (used, ins->sreg2);
+ if (MONO_IS_STORE_MEMBASE (ins))
+ mono_bitset_set_fast (used, ins->dreg);
+
+ if (MONO_IS_CALL (ins)) {
+ MonoCallInst *call = (MonoCallInst*)ins;
+ GSList *l;
+
+ if (call->out_ireg_args) {
+ for (l = call->out_ireg_args; l; l = l->next) {
+ guint32 regpair, reg;
+
+ regpair = (guint32)(gssize)(l->data);
+ reg = regpair & 0xffffff;
+
+ mono_bitset_set_fast (used, reg);
+ }
+ }
+
+ if (call->out_freg_args) {
+ for (l = call->out_freg_args; l; l = l->next) {
+ guint32 regpair, reg;
+
+ regpair = (guint32)(gssize)(l->data);
+ reg = regpair & 0xffffff;
+
+ mono_bitset_set_fast (used, reg);
+ }
+ }
+ }
+ }
+ }
+
+ //mono_print_code (cfg, "AFTER LOCAL-DEADCE");
+}
projects / mono.git / blobdiff