stage1 实现部分ast2ir内容并重构stage0 引入并重构ir2vm 构建系统修改部分

stage0/spl_cli.c

@@ -29,6 +29,7 @@ typedef struct {
     int debug;
     int debug_cli;
     int trace;
+    int disasm;
     const char *entry;
     const char *path;  /* file.sir */
     const char **args; /* spl 程序参数（file.sir 之后） */
@@ -39,6 +40,7 @@ static void usage(void) {
     fprintf(stderr, "Usage: spl_cli [options] <file.sir> [args...]\n"
                     "  -d, --debug       stack-canary checks\n"
                     "  -g, --debug-cli   interactive debugger (REPL)\n"
+                    "  --disasm          disasm dump sir\n"
                     "  --entry <name>    entry function (default: main)\n"
                     "  --trace           print every instruction\n"
                     "  -h, --help        show help\n");
@@ -63,6 +65,8 @@ static int parse_args(int argc, const char **argv, cli_opts_t *o) {
                 o->debug_cli = 1;
             } else if (strcmp(a, "--trace") == 0) {
                 o->trace = 1;
+            } else if (strcmp(a, "--disasm") == 0) {
+                o->disasm = 1;
             } else if (strcmp(a, "--entry") == 0) {
                 if (i + 1 >= argc) {
                     fprintf(stderr, "spl_cli: --entry needs a name\n");
@@ -624,6 +628,11 @@ int main(int argc, const char **argv) {
         fprintf(stderr, "spl_cli: cannot load '%s'\n", o.path);
         return 1;
     }
+
+    if (o.disasm) {
+        spl_prog_dump(&prog);
+        return 0;
+    }
     spl_syscall_register(&prog);
 
     spl_vm_t vm;