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Improve register allocator (give preference to loop variables).

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This commit is contained in:
Dmitry Stogov
2020-10-20 12:19:44 +03:00
parent 87d2bb7424
commit ea1590937b
2 changed files with 16 additions and 2 deletions
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4
ext/opcache/jit/zend_jit.c
View File

@@ -964,7 +964,7 @@ static zend_lifetime_interval *zend_jit_sort_intervals(zend_lifetime_interval **
if (ival) {
if ((ival->range.start > last->range.start) ||
(ival->range.start == last->range.start &&
((!ival->hint && last->hint) ||
((!ival->hint && last->hint && last->hint != ival) ||
ival->range.end > last->range.end))) {
last->list_next = ival;
last = ival;
@@ -979,7 +979,7 @@ static zend_lifetime_interval *zend_jit_sort_intervals(zend_lifetime_interval **
break;
} else if ((ival->range.start < (*p)->range.start) ||
(ival->range.start == (*p)->range.start &&
((ival->hint && !(*p)->hint) ||
((ival->hint && !(*p)->hint && ival->hint != *p) ||
ival->range.end < (*p)->range.end))) {
ival->list_next = *p;
*p = ival;

14
ext/opcache/jit/zend_jit_trace.c
View File

@@ -2641,12 +2641,26 @@ static zend_lifetime_interval** zend_jit_trace_allocate_registers(zend_jit_trace
intervals[ssa->ops[line].op1_use] &&
ssa->ops[line].op1_use_chain < 0 &&
!ssa->vars[ssa->ops[line].op1_use].phi_use_chain) {
zend_ssa_phi *phi = ssa->vars[ssa->ops[line].op1_use].definition_phi;
if (phi &&
intervals[phi->sources[1]] &&
intervals[phi->sources[1]]->hint == intervals[ssa->ops[line].op1_use]) {
break;
}
zend_jit_add_hint(intervals, i, ssa->ops[line].op1_use);
} else if (opline->opcode != ZEND_SUB &&
ssa->ops[line].op2_use >= 0 &&
intervals[ssa->ops[line].op2_use] &&
ssa->ops[line].op2_use_chain < 0 &&
!ssa->vars[ssa->ops[line].op2_use].phi_use_chain) {
zend_ssa_phi *phi = ssa->vars[ssa->ops[line].op2_use].definition_phi;
if (phi &&
intervals[phi->sources[1]] &&
intervals[phi->sources[1]]->hint == intervals[ssa->ops[line].op2_use]) {
break;
}
zend_jit_add_hint(intervals, i, ssa->ops[line].op2_use);
}
}