; LLVM IR from theck01/offbrand_lib :: src/classes (obint)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%struct.obint_struct = type { ptr, i8, ptr, i64 }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local i64 @obint_most_sig(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i64 @obint_magnitude(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = call i64 @obint_most_sig(ptr noundef %6)
  store i64 %7, ptr %4, align 8, !tbaa !9
  store i64 0, ptr %5, align 8, !tbaa !9
  %8 = load i64, ptr %4, align 8, !tbaa !9
  store i64 %8, ptr %3, align 8, !tbaa !9
  br label %9

9:                                                ; preds = %25, %1
  %10 = load i64, ptr %3, align 8, !tbaa !9
  %11 = load i64, ptr %4, align 8, !tbaa !9
  %12 = icmp ule i64 %10, %11
  br i1 %12, label %13, label %28

13:                                               ; preds = %9
  %14 = load i64, ptr %5, align 8, !tbaa !9
  %15 = mul nsw i64 %14, 10
  store i64 %15, ptr %5, align 8, !tbaa !9
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.obint_struct, ptr %16, i32 0, i32 2
  %18 = load ptr, ptr %17, align 8, !tbaa !11
  %19 = load i64, ptr %3, align 8, !tbaa !9
  %20 = getelementptr inbounds i8, ptr %18, i64 %19
  %21 = load i8, ptr %20, align 1, !tbaa !13
  %22 = sext i8 %21 to i64
  %23 = load i64, ptr %5, align 8, !tbaa !9
  %24 = add nsw i64 %23, %22
  store i64 %24, ptr %5, align 8, !tbaa !9
  br label %25

25:                                               ; preds = %13
  %26 = load i64, ptr %3, align 8, !tbaa !9
  %27 = add i64 %26, -1
  store i64 %27, ptr %3, align 8, !tbaa !9
  br label %9, !llvm.loop !14

28:                                               ; preds = %9
  %29 = load i64, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret i64 %29
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !6, i64 16}
!12 = !{!"obint_struct", !6, i64 0, !7, i64 8, !6, i64 16, !10, i64 24}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: nounwind uwtable
declare dso_local i64 @obint_most_sig(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i64 @obint_magnitude(ptr noundef %0) local_unnamed_addr #0 {
  %2 = tail call i64 @obint_most_sig(ptr noundef %0)
  %3 = getelementptr inbounds i8, ptr %0, i64 16
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %1, %5
  %.011 = phi i64 [ 0, %1 ], [ %10, %5 ]
  %.0910 = phi i64 [ %2, %1 ], [ %11, %5 ]
  %6 = mul nsw i64 %.011, 10
  %7 = getelementptr inbounds i8, ptr %4, i64 %.0910
  %8 = load i8, ptr %7, align 1, !tbaa !11
  %9 = sext i8 %8 to i64
  %10 = add nsw i64 %6, %9
  %11 = add i64 %.0910, -1
  %.not = icmp ugt i64 %11, %2
  br i1 %.not, label %12, label %5, !llvm.loop !12

12:                                               ; preds = %5
  ret i64 %10
}

attributes #0 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !7, i64 16}
!6 = !{!"obint_struct", !7, i64 0, !8, i64 8, !7, i64 16, !10, i64 24}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!8, !8, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass