move code for emitting zir up so even if semantic analysis fails, zir will be emitted

Author: g-w1

src/main.zig

@@ -1947,6 +1947,20 @@ const AfterUpdateHook = union(enum) {
 fn updateModule(gpa: *Allocator, comp: *Compilation, zir_out_path: ?[]const u8, hook: AfterUpdateHook) !void {
     try comp.update();
 
+    if (zir_out_path) |zop| {
+        const module = comp.bin_file.options.module orelse
+            fatal("-femit-zir with no zig source code", .{});
+        var new_zir_module = try zir.emit(gpa, module);
+        defer new_zir_module.deinit(gpa);
+
+        const baf = try io.BufferedAtomicFile.create(gpa, fs.cwd(), zop, .{});
+        defer baf.destroy();
+
+        try new_zir_module.writeToStream(gpa, baf.stream());
+
+        try baf.finish();
+    }
+
     var errors = try comp.getAllErrorsAlloc();
     defer errors.deinit(comp.gpa);
 
@@ -1966,19 +1980,7 @@ fn updateModule(gpa: *Allocator, comp: *Compilation, zir_out_path: ?[]const u8,
         ),
     }
 
-    if (zir_out_path) |zop| {
-        const module = comp.bin_file.options.module orelse
-            fatal("-femit-zir with no zig source code", .{});
-        var new_zir_module = try zir.emit(gpa, module);
-        defer new_zir_module.deinit(gpa);
 
-        const baf = try io.BufferedAtomicFile.create(gpa, fs.cwd(), zop, .{});
-        defer baf.destroy();
-
-        try new_zir_module.writeToStream(gpa, baf.stream());
-
-        try baf.finish();
-    }
 }
 
 fn cmdTranslateC(comp: *Compilation, arena: *Allocator, enable_cache: bool) !void {