Attempt to fix compatability with LLVM 21. (Closes: #419)

    if actual_ver >= "16.0":

        diff_file = "rlib_llvm_dis_expected_diff_16"

    if actual_ver >= "21.0":

        diff_file = "rlib_llvm_dis_expected_diff_21"

    return get_data(diff_file)

@@ -42,32 +42,32 @@

 entry-block:

   %out.i.i = alloca ptr, align 8

   %4 = icmp ult i64 %3, 17

   br i1 %4, label %then-block-195-.i, label %_ZN12alloc_system3imp8allocate17h8ba7625cc4a820e8E.exit.i

 then-block-195-.i:                                ; preds = %entry-block

   %5 = tail call ptr @realloc(ptr %0, i64 %2) #2

-  br label %_ZN12alloc_system3imp10reallocate17h4a0811c9ec086854E.exit

+  br label %_ZN12alloc_system3imp10reallocate1l44a0811c9ec086854E.exit

 _ZN12alloc_system3imp8allocate17h8ba7625cc4a820e8E.exit.i: ; preds = %entry-block

   %6 = bitcast ptr %out.i.i to ptr

   call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2

   store ptr null, ptr %out.i.i, align 8

   %7 = call i32 @posix_memalign(ptr nonnull %out.i.i, i64 %3, i64 %2) #2

   %8 = icmp eq i32 %7, 0

   %9 = load ptr, ptr %out.i.i, align 8

   %sret_slot.0.i.i = select i1 %8, ptr %9, ptr null

   call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2

   %10 = icmp ule i64 %2, %1

   %11 = select i1 %10, i64 %2, i64 %1

   call void @llvm.memmove.p0.p0.i64(ptr align 1 %sret_slot.0.i.i, ptr align 1 %0, i64 %11, i1 false) #2

   call void @free(ptr %0) #2

-  br label %_ZN12alloc_system3imp10reallocate17h4a0811c9ec086854E.exit

+  br label %_ZN12alloc_system3imp10reallocate1l44a0811c9ec086854E.exit

-_ZN12alloc_system3imp10reallocate17h4a0811c9ec086854E.exit: ; preds = %_ZN12alloc_system3imp8allocate17h8ba7625cc4a820e8E.exit.i, %then-block-195-.i

+_ZN12alloc_system3imp10reallocate1l44a0811c9ec086854E.exit: ; preds = %_ZN12alloc_system3imp8allocate17h8ba7625cc4a820e8E.exit.i, %then-block-195-.i

   %sret_slot.0.i = phi ptr [ %5, %then-block-195-.i ], [ %sret_slot.0.i.i, %_ZN12alloc_system3imp8allocate17h8ba7625cc4a820e8E.exit.i ]

   ret ptr %sret_slot.0.i

 }

 ; Function Attrs: nounwind memory(none) uwtable

 define i64 @__rust_reallocate_inplace(ptr readnone captures(none) %0, i64 %1, i64 %2, i64 %3) unnamed_addr #1 {

 entry-block: