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- Add a test to make certain romcc is properly allocating registers.

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git-svn-id: svn://svn.coreboot.org/coreboot/trunk@828 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Eric Biederman
2003-05-13 20:45:19 +00:00
parent 0babc1c116
commit a96d6a9dab
3 changed files with 205 additions and 8 deletions
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64
util/romcc/romcc.c
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@ -10195,6 +10195,14 @@ static void walk_variable_lifetimes(struct compile_state *state,
}
do_triple_set(&live, *expr, 0);
}
expr = triple_lhs(state, ptr, 0);
for(;expr; expr = triple_lhs(state, ptr, expr)) {
/* If the triple is not a definition skip it. */
if (!*expr || !triple_is_def(state, *expr)) {
continue;
}
do_triple_set(&live, *expr, 0);
}
}
/* Free live */
@ -11017,21 +11025,58 @@ static void color_graph(struct compile_state *state, struct reg_state *rstate)
cgdebug_printf(" %s\n", arch_reg_str(range->color));
}
static void verify_colors(struct compile_state *state, struct reg_state *rstate)
{
struct live_range *lr;
struct live_range_edge *edge;
struct triple *ins, *first;
char used[MAX_REGISTERS];
first = RHS(state->main_function, 0);
ins = first;
do {
if (triple_is_def(state, ins)) {
if ((ins->id < 0) || (ins->id > rstate->ranges)) {
internal_error(state, ins,
"triple without a live range");
}
lr = &rstate->lr[ins->id];
if (lr->color == REG_UNSET) {
internal_error(state, ins,
"triple without a color");
}
/* Find the registers used by the edges */
memset(used, 0, sizeof(used));
for(edge = lr->edges; edge; edge = edge->next) {
if (edge->node->color == REG_UNSET) {
internal_error(state, 0,
"live range without a color");
}
reg_fill_used(state, used, edge->node->color);
}
if (used[lr->color]) {
internal_error(state, ins,
"triple with already used color");
}
}
ins = ins->next;
} while(ins != first);
}
static void color_triples(struct compile_state *state, struct reg_state *rstate)
{
struct live_range *lr;
struct triple *first, *triple;
struct triple *first, *ins;
first = RHS(state->main_function, 0);
triple = first;
ins = first;
do {
if ((triple->id < 0) || (triple->id > rstate->ranges)) {
internal_error(state, triple,
if ((ins->id < 0) || (ins->id > rstate->ranges)) {
internal_error(state, ins,
"triple without a live range");
}
lr = &rstate->lr[triple->id];
triple->id = MK_REG_ID(lr->color, 0);
triple = triple->next;
} while (triple != first);
lr = &rstate->lr[ins->id];
ins->id = MK_REG_ID(lr->color, 0);
ins = ins->next;
} while (ins != first);
}
static void print_interference_block(
@ -11299,6 +11344,9 @@ static void allocate_registers(struct compile_state *state)
/* Color the live_ranges */
color_graph(state, &rstate);
/* Verify the graph was properly colored */
verify_colors(state, &rstate);
/* Move the colors from the graph to the triples */
color_triples(state, &rstate);