;;; TOOL: run-objdump
;;; ARGS0: -v
(module
  (func                     ;; depth
    block $outer           ;; 4
      loop                 ;; 2 loop, 3 exit
        block              ;; 1
          i32.const 0
          drop 
          block $inner     ;; 0
            br 0
            br 1
            br 2
            br 3
          end
        end
      end
    end))
(;; STDOUT ;;;
0000000: 0061 736d                                 ; WASM_BINARY_MAGIC
0000004: 0100 0000                                 ; WASM_BINARY_VERSION
; section "Type" (1)
0000008: 01                                        ; section code
0000009: 00                                        ; section size (guess)
000000a: 01                                        ; num types
; type 0
000000b: 60                                        ; func
000000c: 00                                        ; num params
000000d: 00                                        ; num results
0000009: 04                                        ; FIXUP section size
; section "Function" (3)
000000e: 03                                        ; section code
000000f: 00                                        ; section size (guess)
0000010: 01                                        ; num functions
0000011: 00                                        ; function 0 signature index
000000f: 02                                        ; FIXUP section size
; section "Code" (10)
0000012: 0a                                        ; section code
0000013: 00                                        ; section size (guess)
0000014: 01                                        ; num functions
; function body 0
0000015: 00                                        ; func body size (guess)
0000016: 00                                        ; local decl count
0000017: 02                                        ; block
0000018: 40                                        ; void
0000019: 03                                        ; loop
000001a: 40                                        ; void
000001b: 02                                        ; block
000001c: 40                                        ; void
000001d: 41                                        ; i32.const
000001e: 00                                        ; i32 literal
000001f: 1a                                        ; drop
0000020: 02                                        ; block
0000021: 40                                        ; void
0000022: 0c                                        ; br
0000023: 00                                        ; break depth
0000024: 0c                                        ; br
0000025: 01                                        ; break depth
0000026: 0c                                        ; br
0000027: 02                                        ; break depth
0000028: 0c                                        ; br
0000029: 03                                        ; break depth
000002a: 0b                                        ; end
000002b: 0b                                        ; end
000002c: 0b                                        ; end
000002d: 0b                                        ; end
000002e: 0b                                        ; end
0000015: 19                                        ; FIXUP func body size
0000013: 1b                                        ; FIXUP section size

br-block.wasm:	file format wasm 0x1

Code Disassembly:

000016 func[0]:
 000017: 02 40                      | block
 000019: 03 40                      |   loop
 00001b: 02 40                      |     block
 00001d: 41 00                      |       i32.const 0
 00001f: 1a                         |       drop
 000020: 02 40                      |       block
 000022: 0c 00                      |         br 0
 000024: 0c 01                      |         br 1
 000026: 0c 02                      |         br 2
 000028: 0c 03                      |         br 3
 00002a: 0b                         |       end
 00002b: 0b                         |     end
 00002c: 0b                         |   end
 00002d: 0b                         | end
 00002e: 0b                         | end
;;; STDOUT ;;)