unreduced test case for Bril bug #295

problem.bril

@main(b0: bool, b1: bool) {
    jmp .start;
  .end:
    print x_0_2;
    print x_1_2;
    ret;
  .l_1_3:
    jmp .end;
  .l_1_2:
    x_1_2 : int = const 0;
    jmp .l_1_3;
  .l_1_1:
    x_1_1 : int = const 1;
    jmp .l_1_3;
  .l_0_3:
    br b1 .l_1_1 .l_1_2;
  .l_0_2:
    x_0_2 : int = const 2;
    jmp .l_0_3;
  .l_0_1:
    x_0_1 : int = const 3;
    jmp .l_0_3;
  .start:
    br b0 .l_0_1 .l_0_2;
}