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Various SSA-related tweaks

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* Add FETCH_LIST to inference
* Restrict JMP_SET/COALESCE result type
* Fix typos in range inference
* Add const annotations in zend_ssa.h
* For pi statements dump the associated predecessor block
* If type can be both true and false, dump bool instead
This commit is contained in:
Nikita Popov 2016-02-27 18:51:53 +01:00
parent ff1f178d84
commit a1c48d5e3a
3 changed files with 23 additions and 10 deletions
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10
ext/opcache/Optimizer/zend_dump.c
View file

@ -182,11 +182,13 @@ static void zend_dump_type_info(uint32_t info, zend_class_entry *ce, int is_inst
if (first) first = 0; else fprintf(stderr, ", ");
fprintf(stderr, "null");
}
if (info & MAY_BE_FALSE) {
if ((info & MAY_BE_FALSE) && (info & MAY_BE_TRUE)) {
if (first) first = 0; else fprintf(stderr, ", ");
fprintf(stderr, "bool");
} else if (info & MAY_BE_FALSE) {
if (first) first = 0; else fprintf(stderr, ", ");
fprintf(stderr, "false");
}
if (info & MAY_BE_TRUE) {
} else if (info & MAY_BE_TRUE) {
if (first) first = 0; else fprintf(stderr, ", ");
fprintf(stderr, "true");
}
@ -788,7 +790,7 @@ static void zend_dump_block_header(const zend_cfg *cfg, const zend_op_array *op_
}
fprintf(stderr, ")\n");
} else {
fprintf(stderr, " = Pi(");
fprintf(stderr, " = Pi<BB%d>(", p->pi);
zend_dump_ssa_var(op_array, ssa, p->sources[0], 0, p->var, dump_flags);
fprintf(stderr, " &");
zend_dump_pi_constraint(op_array, ssa, &p->constraint, dump_flags);

19
ext/opcache/Optimizer/zend_inference.c
View file

@ -962,7 +962,7 @@ int zend_inference_calc_range(const zend_op_array *op_array, zend_ssa *ssa, int
op2_max = OP2_MAX_RANGE();
tmp->min = (op1_min == op1_max &&
op2_min == op2_min &&
op2_min == op2_max &&
op1_min == op2_max);
tmp->max = (op1_min <= op2_max && op1_max >= op2_min);
return 1;
@ -984,7 +984,7 @@ int zend_inference_calc_range(const zend_op_array *op_array, zend_ssa *ssa, int
tmp->min = (op1_min > op2_max || op1_max < op2_min);
tmp->max = (op1_min != op1_max ||
op2_min != op2_min ||
op2_min != op2_max ||
op1_min != op2_max);
return 1;
} else {
@ -2359,6 +2359,14 @@ static void zend_update_type_info(const zend_op_array *op_array,
if (opline->op1_type & (IS_CV|IS_VAR)) {
tmp |= MAY_BE_RCN;
}
if (opline->opcode != ZEND_QM_ASSIGN) {
/* COALESCE and JMP_SET result can't be null */
tmp &= ~MAY_BE_NULL;
if (opline->opcode == ZEND_JMP_SET) {
/* JMP_SET result can't be false either */
tmp &= ~MAY_BE_FALSE;
}
}
UPDATE_SSA_TYPE(tmp, ssa_ops[i].result_def);
if ((t1 & MAY_BE_OBJECT) && ssa_ops[i].op1_use >= 0 && ssa_var_info[ssa_ops[i].op1_use].ce) {
UPDATE_SSA_OBJ_TYPE(ssa_var_info[ssa_ops[i].op1_use].ce, ssa_var_info[ssa_ops[i].op1_use].is_instanceof, ssa_ops[i].result_def);
@ -3438,6 +3446,7 @@ static void zend_update_type_info(const zend_op_array *op_array,
case ZEND_FETCH_DIM_W:
case ZEND_FETCH_DIM_UNSET:
case ZEND_FETCH_DIM_FUNC_ARG:
case ZEND_FETCH_LIST:
if (ssa_ops[i].op1_def >= 0) {
tmp = t1;
if (opline->opcode == ZEND_FETCH_DIM_W ||
@ -3520,9 +3529,11 @@ static void zend_update_type_info(const zend_op_array *op_array,
UPDATE_SSA_OBJ_TYPE(NULL, 0, ssa_ops[i].op1_def);
}
}
/* FETCH_LIST on a string behaves like FETCH_R on null */
tmp = zend_array_element_type(
t1,
(opline->opcode != ZEND_FETCH_DIM_R && opline->opcode != ZEND_FETCH_DIM_IS),
opline->opcode != ZEND_FETCH_LIST ? t1 : ((t1 & ~MAY_BE_STRING) | MAY_BE_NULL),
opline->opcode != ZEND_FETCH_DIM_R && opline->opcode != ZEND_FETCH_DIM_IS
&& opline->opcode != ZEND_FETCH_LIST,
opline->op2_type == IS_UNUSED);
if (opline->opcode == ZEND_FETCH_DIM_W ||
opline->opcode == ZEND_FETCH_DIM_RW ||

4
ext/opcache/Optimizer/zend_ssa.h
View file

@ -122,7 +122,7 @@ int zend_ssa_unlink_use_chain(zend_ssa *ssa, int op, int var);
END_EXTERN_C()
static zend_always_inline int zend_ssa_next_use(zend_ssa_op *ssa_op, int var, int use)
static zend_always_inline int zend_ssa_next_use(const zend_ssa_op *ssa_op, int var, int use)
{
ssa_op += use;
if (ssa_op->result_use == var) {
@ -131,7 +131,7 @@ static zend_always_inline int zend_ssa_next_use(zend_ssa_op *ssa_op, int var, in
return (ssa_op->op1_use == var) ? ssa_op->op1_use_chain : ssa_op->op2_use_chain;
}
static zend_always_inline zend_ssa_phi* zend_ssa_next_use_phi(zend_ssa *ssa, int var, zend_ssa_phi *p)
static zend_always_inline zend_ssa_phi* zend_ssa_next_use_phi(const zend_ssa *ssa, int var, const zend_ssa_phi *p)
{
if (p->pi >= 0) {
return p->use_chains[0];