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[qfcc] Get dag code generation mostly working

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There's an ICE in return-ivar, but assignchain passes let alone builds.
This commit is contained in:
Bill Currie 2020-03-17 22:35:36 +09:00
parent 16bda66785
commit 77806f4b1b
1 changed files with 93 additions and 27 deletions
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88
tools/qfcc/source/dags.c
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@ -746,14 +746,15 @@ dag_create (flownode_t *flownode)
}
op = opcode_label (dag, s->opcode, s->expr);
n = children[0];
if (s->type != st_assign
&& !(n = dagnode_search (dag, op, children))) {
if (s->type != st_assign) {
if (!(n = dagnode_search (dag, op, children))) {
n = new_node (dag);
n->type = s->type;
n->label = op;
dagnode_add_children (dag, n, operands, children);
dagnode_set_edges (dag, n);
}
}
lx = operand_label (dag, operands[0]);
if (lx && lx->dagnode != n) {
lx->expr = s->expr;
@ -893,6 +894,11 @@ generate_moveps (dag_t *dag, sblock_t *block, dagnode_t *dagnode)
operands[0] = make_operand (dag, block, dagnode, 0);
operands[1] = make_operand (dag, block, dagnode, 1);
if (dagnode->children[2]) {
operands[2] = make_operand (dag, block, dagnode, 2);
st = build_statement ("<MOVEP>", operands, dagnode->label->expr);
sblock_add_statement (block, st);
} else {
for (var_iter = set_first (dagnode->identifiers); var_iter;
var_iter = set_next (var_iter)) {
var = dag->labels[var_iter->element];
@ -908,6 +914,68 @@ generate_moveps (dag_t *dag, sblock_t *block, dagnode_t *dagnode)
st = build_statement ("<MOVEP>", operands, var->expr);
sblock_add_statement (block, st);
}
}
return dst;
}
static operand_t *
generate_memsets (dag_t *dag, sblock_t *block, dagnode_t *dagnode)
{
set_iter_t *var_iter;
daglabel_t *var;
operand_t *operands[3] = {0, 0, 0};
statement_t *st;
operand_t *dst;
operands[0] = make_operand (dag, block, dagnode, 0);
operands[1] = make_operand (dag, block, dagnode, 1);
dst = operands[0];
for (var_iter = set_first (dagnode->identifiers); var_iter;
var_iter = set_next (var_iter)) {
var = dag->labels[var_iter->element];
operands[2] = var->op;
dst = operands[2];
st = build_statement ("<MEMSET>", operands, var->expr);
sblock_add_statement (block, st);
}
return dst;
}
static operand_t *
generate_memsetps (dag_t *dag, sblock_t *block, dagnode_t *dagnode)
{
set_iter_t *var_iter;
daglabel_t *var;
operand_t *operands[3] = {0, 0, 0};
statement_t *st;
operand_t *dst = 0;
type_t *type;
int offset = 0;
def_t *dstDef;
operands[0] = make_operand (dag, block, dagnode, 0);
operands[1] = make_operand (dag, block, dagnode, 1);
if (dagnode->children[2]) {
operands[2] = make_operand (dag, block, dagnode, 2);
st = build_statement ("<MEMSETP>", operands, dagnode->label->expr);
sblock_add_statement (block, st);
} else {
for (var_iter = set_first (dagnode->identifiers); var_iter;
var_iter = set_next (var_iter)) {
var = dag->labels[var_iter->element];
dst = var->op;
type = dst->o.def->type;
dstDef = dst->o.def;
if (dstDef->alias) {
offset = dstDef->offset;
dstDef = dstDef->alias;
}
operands[2] = value_operand (new_pointer_val (offset, type, dstDef, 0),
operands[1]->expr);
st = build_statement ("<MEMSETP>", operands, var->expr);
sblock_add_statement (block, st);
}
}
return dst;
}
@ -987,19 +1055,17 @@ dag_gencode (dag_t *dag, sblock_t *block, dagnode_t *dagnode)
dst = operands[0];
break;
case st_move:
case st_ptrmove:
case st_memset:
case st_ptrmemset:
if (!strcmp (dagnode->label->opcode, "<MOVE>")) {
dst = generate_moves (dag, block, dagnode);
break;
}
if (!strcmp (dagnode->label->opcode, "<MOVEP>")
&& !dagnode->children[2]) {
case st_ptrmove:
dst = generate_moveps (dag, block, dagnode);
break;
}
//fall through
case st_memset:
dst = generate_memsets (dag, block, dagnode);
break;
case st_ptrmemset:
dst = generate_memsetps (dag, block, dagnode);
break;
case st_state:
case st_func:
for (i = 0; i < 3; i++)