+/**
+ * Returns a string containing the names of all registers within the limited bitset
+ */
+static char *get_limited_regs(const arch_register_req_t *req, char *buf, int max) {
+ bitset_t *bs = bitset_alloca(req->cls->n_regs);
+ char *p = buf;
+ int size = 0;
+ int i, cnt;
+
+ req->limited(NULL, bs);
+
+ for (i = 0; i < req->cls->n_regs; i++) {
+ if (bitset_is_set(bs, i)) {
+ cnt = snprintf(p, max - size, " %s", req->cls->regs[i].name);
+ if (cnt < 0) {
+ fprintf(stderr, "dumper problem, exiting\n");
+ exit(1);
+ }
+
+ p += cnt;
+ size += cnt;
+
+ if (size >= max)
+ break;
+ }
+ }
+
+ return buf;
+}
+
+/**
+ * Dumps the register requirements for either in or out.
+ */
+static void dump_reg_req(FILE *F, ir_node *n, const ia32_register_req_t **reqs, int inout) {
+ char *dir = inout ? "out" : "in";
+ int max = inout ? get_ia32_n_res(n) : get_irn_arity(n);
+ char *buf = alloca(1024);
+ int i;
+
+ memset(buf, 0, 1024);
+
+ if (reqs) {
+ for (i = 0; i < max; i++) {
+ fprintf(F, "%sreq #%d =", dir, i);
+
+ if (reqs[i]->req.type == arch_register_req_type_none) {
+ fprintf(F, " n/a");
+ }
+
+ if (reqs[i]->req.type & arch_register_req_type_normal) {
+ fprintf(F, " %s", reqs[i]->req.cls->name);
+ }
+
+ if (reqs[i]->req.type & arch_register_req_type_limited) {
+ fprintf(F, " %s", get_limited_regs(&reqs[i]->req, buf, 1024));
+ }
+
+ if (reqs[i]->req.type & arch_register_req_type_should_be_same) {
+ ir_fprintf(F, " same as %+F", get_irn_n(n, reqs[i]->same_pos));
+ }
+
+ if (reqs[i]->req.type & arch_register_req_type_should_be_different) {
+ ir_fprintf(F, " different from %+F", get_irn_n(n, reqs[i]->different_pos));
+ }
+
+ fprintf(F, "\n");
+ }
+
+ fprintf(F, "\n");
+ }
+ else {
+ fprintf(F, "%sreq = N/A\n", dir);
+ }
+}
+