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[qfcc] Force live vars used by function statements
This uses ud-chains for function statements (call/return) to force their arguments to be live (in particular, indirect references via pointers) this fixes the arraylife test.
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fb1b3e0869
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1 changed files with 13 additions and 2 deletions
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@ -196,7 +196,7 @@ operand_label (dag_t *dag, operand_t *op)
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label->op = op;
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op->label->daglabel = label;
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} else {
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internal_error (op->expr, "unexpected operand type: %d", op->op_type);
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internal_error (op->expr, "unexpected operand type: %s", op_type_names[op->op_type]);
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}
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return label;
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}
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@ -483,7 +483,18 @@ dagnode_set_edges (dag_t *dag, dagnode_t *n, statement_t *s)
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}
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label->live = 1;
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}
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// ensure all operantions on global variables are completed before
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for (int i = 0; i < s->num_use; i++) {
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udchain_t ud = func->ud_chains[s->first_use + i];
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flowvar_t *var = func->vars[ud.var];
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if (var->op->op_type == op_pseudo) {
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continue;
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}
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daglabel_t *l = operand_label (dag, var->op);
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if (l) {
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l->live = 1;
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}
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}
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// ensure all operations on global variables are completed before
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// the st_func statement executes
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for (set_iter_t *g = set_first (func->global_vars); g;
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g = set_next (g)) {
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