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a tiny speedup, seems like -O2 doesn't do that by itself

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Wolfgang Bumiller 2013-01-15 20:57:30 +01:00
parent e695a5919d
commit f8f4ad8ee5
1 changed files with 15 additions and 16 deletions
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31
ir.c
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@ -1265,12 +1265,13 @@ bool ir_value_life_insert(ir_value *self, size_t idx, ir_life_entry_t e)
bool ir_value_life_merge(ir_value *self, size_t s)
{
size_t i;
const size_t vs = vec_size(self->life);
ir_life_entry_t *life = NULL;
ir_life_entry_t *before = NULL;
ir_life_entry_t new_entry;
/* Find the first range >= s */
for (i = 0; i < vec_size(self->life); ++i)
for (i = 0; i < vs; ++i)
{
before = life;
life = &self->life[i];
@ -1278,7 +1279,7 @@ bool ir_value_life_merge(ir_value *self, size_t s)
break;
}
/* nothing found? append */
if (i == vec_size(self->life)) {
if (i == vs) {
ir_life_entry_t e;
if (life && life->end+1 == s)
{
@ -2456,7 +2457,6 @@ static bool ir_block_life_propagate(ir_block *self, ir_block *prev, bool *change
{
ir_instr *instr;
ir_value *value;
bool tempbool;
size_t i, o, p, mem;
/* bitmasks which operands are read from or written to */
size_t read, write;
@ -2516,23 +2516,23 @@ static bool ir_block_life_propagate(ir_block *self, ir_block *prev, bool *change
* since this function is run multiple times.
*/
/* con_err( "Value only written %s\n", value->name); */
tempbool = ir_value_life_merge(value, instr->eid);
*changed = *changed || tempbool;
if (ir_value_life_merge(value, instr->eid))
*changed = true;
} else {
/* since 'living' won't contain it
* anymore, merge the value, since
* (A) doesn't.
*/
tempbool = ir_value_life_merge(value, instr->eid);
*changed = *changed || tempbool;
if (ir_value_life_merge(value, instr->eid))
*changed = true;
/* Then remove */
vec_remove(self->living, idx, 1);
}
/* Removing a vector removes all members */
for (mem = 0; mem < 3; ++mem) {
if (value->members[mem] && vec_ir_value_find(self->living, value->members[mem], &idx)) {
tempbool = ir_value_life_merge(value->members[mem], instr->eid);
*changed = *changed || tempbool;
if (ir_value_life_merge(value->members[mem], instr->eid))
*changed = true;
vec_remove(self->living, idx, 1);
}
}
@ -2544,8 +2544,8 @@ static bool ir_block_life_propagate(ir_block *self, ir_block *prev, bool *change
break;
}
if (mem == 3 && vec_ir_value_find(self->living, value, &idx)) {
tempbool = ir_value_life_merge(value, instr->eid);
*changed = *changed || tempbool;
if (ir_value_life_merge(value, instr->eid))
*changed = true;
vec_remove(self->living, idx, 1);
}
}
@ -2636,13 +2636,12 @@ static bool ir_block_life_propagate(ir_block *self, ir_block *prev, bool *change
}
/* (A) */
tempbool = ir_block_living_add_instr(self, instr->eid);
/*con_err( "living added values\n");*/
*changed = *changed || tempbool;
if (ir_block_living_add_instr(self, instr->eid))
*changed = true;
}
/* the "entry" instruction ID */
tempbool = ir_block_living_add_instr(self, self->entry_id);
*changed = *changed || tempbool;
if (ir_block_living_add_instr(self, self->entry_id))
*changed = true;
if (self->run_id == self->owner->run_id)
return true;