aot compiler halts when there exists an infinite loop in clinit()

[Yuting Chen]

Hi, I recently met a problem: when I tried to compile a class whose
clinit method contains an infinite loop, the aotc waits and fails to
response....

It seems that the aotc performs some static analysis before the
compilation, while the analysis may not stop (when an infinite loop is
there).

The bytecode is shown as follows:

public class Vector1
  minor version: 0
  major version: 52
  flags: ACC_PUBLIC, ACC_SUPER
Constant pool:
   #1 = Utf8               Vector1
   #2 = Class              #1             // Vector1
   #3 = Utf8               java/lang/Object
   #4 = Class              #3             // java/lang/Object
   #5 = Utf8               serialVersionUID
   #6 = Utf8               J
   #7 = Long               -2767605614048989439l
   #9 = Utf8               <clinit>
  #10 = Utf8               ()V
  #11 = NameAndType        #5:#6          // serialVersionUID:J
  #12 = Fieldref           #2.#11         // Vector1.serialVersionUID:J
  #13 = Utf8               main
  #14 = Utf8               ([Ljava/lang/String;)V
  #15 = Utf8               ConstantValue
  #16 = Utf8               Code
  #17 = Utf8               StackMapTable
{
  public static {};
    descriptor: ()V
    flags: ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: ldc2_w        #7                  // long -2767605614048989439l
         3: putstatic     #12                 // Field serialVersionUID:J
         6: iconst_1
         7: iconst_m1
         8: iadd
         9: ifge          0
        12: return
      StackMapTable: number_of_entries = 1
        frame_type = 0 /* same */

  public static void main(java.lang.String[]);
    descriptor: ([Ljava/lang/String;)V
    flags: ACC_PUBLIC, ACC_STATIC
    Code:
      stack=0, locals=1, args_size=1
         0: return
}