llvm-objdump

See asm and c related code

llvm-objdump -d --symbolize-operands --no-addresses --x86-asm-syntax=intel --no-show-raw-insn loop-1-clang.c.o

run_switches:
      xor     eax, eax            # res = 0
loop:                             # while (true) {
      movsx   ecx, byte ptr [rdi] #   c = *input
      test    ecx, ecx            #   if (c == '\0')
      je      ret                 #     return
      add     rdi, 1              #   input++
      cmp     ecx, 'p'            #   if (c == 'p')
      je      p                   #     goto p
      cmp     ecx, 's'            #   if (c == 's')
      jne     loop                #     continue
      add     eax, 1              #   res++
      jmp     loop                #   continue
p:    add     eax, -1             #   res--
      jmp     loop                # }
ret:  ret

With the related loop-1-clang.c following code

int run_switches(char *input) {
  int res = 0;
  while (true) {
    char c = *input++;
    switch (c) {
      case '\0':
        return res;
      case 's':
        res += 1;
        break;
      case 'p':
        res -= 1;
        break;
      default:
        break;
    }
  }
}

source