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Move the var def/use calculation into flow_build_vars().

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This commit is contained in:
Bill Currie 2012-12-09 21:22:57 +09:00
parent 2bc3a36126
commit f3adb70ee4
1 changed files with 20 additions and 22 deletions
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42
tools/qfcc/source/flow.c
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@ -314,6 +314,10 @@ flow_build_vars (function_t *func)
statement_t *s;
int num_vars = 0;
int i;
set_t *stuse;
set_t *stdef;
set_iter_t *var_i;
flowvar_t *var;
// first, count .return and .param_[0-7] as they are always needed
for (i = 0; i < num_flow_params; i++) {
@ -333,6 +337,9 @@ flow_build_vars (function_t *func)
func->vars = malloc (num_vars * sizeof (daglabel_t *));
stuse = set_new ();
stdef = set_new ();
func->num_vars = 0; // incremented by add_operand
// first, add .return and .param_[0-7] as they are always needed
for (i = 0; i < num_flow_params; i++)
@ -344,6 +351,16 @@ flow_build_vars (function_t *func)
add_operand (func, s->opa);
add_operand (func, s->opb);
add_operand (func, s->opc);
flow_analyze_statement (s, stuse, stdef, 0, 0);
for (var_i = set_first (stdef); var_i; var_i = set_next (var_i)) {
var = func->vars[var_i->value];
set_add (var->define, i);
}
for (var_i = set_first (stuse); var_i; var_i = set_next (var_i)) {
var = func->vars[var_i->value];
set_add (var->use, i);
}
}
func->global_vars = set_new ();
// mark all global vars (except .return and .param_N)
@ -351,6 +368,9 @@ flow_build_vars (function_t *func)
if (flowvar_is_global (func->vars[i]))
set_add (func->global_vars, i);
}
set_delete (stuse);
set_delete (stdef);
}
static void
@ -962,34 +982,12 @@ flow_build_graph (function_t *func)
void
flow_data_flow (function_t *func)
{
int i;
flowgraph_t *graph;
flownode_t *node;
statement_t *st;
flowvar_t *var;
set_t *stuse = set_new ();
set_t *stdef = set_new ();
set_iter_t *var_i;
flow_build_statements (func);
flow_build_vars (func);
graph = flow_build_graph (func);
func->graph = graph;
for (i = 0; i < graph->num_nodes; i++) {
node = graph->nodes[i];
for (st = node->sblock->statements; st; st = st->next) {
flow_analyze_statement (st, stuse, stdef, 0, 0);
for (var_i = set_first (stdef); var_i; var_i = set_next (var_i)) {
var = graph->func->vars[var_i->value];
set_add (var->define, st->number);
}
for (var_i = set_first (stuse); var_i; var_i = set_next (var_i)) {
var = graph->func->vars[var_i->value];
set_add (var->use, st->number);
}
}
}
flow_live_vars (graph);
flow_uninitialized (graph);
flow_build_dags (graph);