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liferange calc now sets the 'locked' flag on values when reaching a CALL

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Wolfgang Bumiller 2012-12-25 21:03:26 +01:00
parent 35ba2dcaf9
commit 710f580e15
2 changed files with 21 additions and 4 deletions
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23
ir.c
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@ -987,6 +987,7 @@ ir_value* ir_value_var(const char *name, int storetype, int vtype)
self->memberof = NULL;
self->unique_life = false;
self->locked = false;
self->life = NULL;
return self;
@ -2289,15 +2290,24 @@ static bool ir_block_living_add_instr(ir_block *self, size_t eid)
for (i = 0; i != vec_size(self->living); ++i)
{
tempbool = ir_value_life_merge(self->living[i], eid);
/* debug
if (tempbool)
irerror(self->context, "block_living_add_instr() value instruction added %s: %i", self->living[i]->_name, (int)eid);
*/
changed = changed || tempbool;
}
return changed;
}
static bool ir_block_living_lock(ir_block *self)
{
size_t i;
bool changed = false;
for (i = 0; i != vec_size(self->living); ++i)
{
if (!self->living[i]->locked)
changed = true;
self->living[i]->locked = true;
}
return changed;
}
static bool ir_block_life_prop_previous(ir_block* self, ir_block *prev, bool *changed)
{
size_t i;
@ -2502,6 +2512,11 @@ static bool ir_block_life_propagate(ir_block *self, ir_block *prev, bool *change
vec_push(self->living, value->members[mem]);
}
}
/* on a call, all these values must be "locked" */
if (instr->opcode >= INSTR_CALL0 && instr->opcode <= INSTR_CALL8) {
if (ir_block_living_lock(self))
*changed = true;
}
/* (A) */
tempbool = ir_block_living_add_instr(self, instr->eid);

2
ir.h
View file

@ -77,6 +77,8 @@ typedef struct ir_value_s {
/* arrays will never overlap with temps */
bool unique_life;
/* temps living during a CALL must be locked */
bool locked;
/* For the temp allocator */
ir_life_entry_t *life;