; LLVM IR from nonstriater/Learn-Algorithms :: 6 Sort (insert_sort)

; 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"

; 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
define dso_local void @select_sort(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %65, %2
  %10 = load i32, ptr %8, align 4, !tbaa !9
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %68

14:                                               ; preds = %9
  %15 = load i32, ptr %8, align 4, !tbaa !9
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr %7, align 4, !tbaa !9
  %17 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %17, ptr %5, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %37, %14
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = load i32, ptr %4, align 4, !tbaa !9
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %22, label %40

22:                                               ; preds = %18
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = load i32, ptr %5, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds i32, ptr %23, i64 %25
  %27 = load i32, ptr %26, align 4, !tbaa !9
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = load i32, ptr %7, align 4, !tbaa !9
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds i32, ptr %28, i64 %30
  %32 = load i32, ptr %31, align 4, !tbaa !9
  %33 = icmp sgt i32 %27, %32
  br i1 %33, label %34, label %36

34:                                               ; preds = %22
  %35 = load i32, ptr %7, align 4, !tbaa !9
  store i32 %35, ptr %5, align 4, !tbaa !9
  br label %36

36:                                               ; preds = %34, %22
  br label %37

37:                                               ; preds = %36
  %38 = load i32, ptr %7, align 4, !tbaa !9
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %7, align 4, !tbaa !9
  br label %18, !llvm.loop !11

40:                                               ; preds = %18
  %41 = load i32, ptr %5, align 4, !tbaa !9
  %42 = load i32, ptr %8, align 4, !tbaa !9
  %43 = icmp ne i32 %41, %42
  br i1 %43, label %44, label %64

44:                                               ; preds = %40
  %45 = load ptr, ptr %3, align 8, !tbaa !5
  %46 = load i32, ptr %8, align 4, !tbaa !9
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds i32, ptr %45, i64 %47
  %49 = load i32, ptr %48, align 4, !tbaa !9
  store i32 %49, ptr %6, align 4, !tbaa !9
  %50 = load ptr, ptr %3, align 8, !tbaa !5
  %51 = load i32, ptr %5, align 4, !tbaa !9
  %52 = sext i32 %51 to i64
  %53 = getelementptr inbounds i32, ptr %50, i64 %52
  %54 = load i32, ptr %53, align 4, !tbaa !9
  %55 = load ptr, ptr %3, align 8, !tbaa !5
  %56 = load i32, ptr %8, align 4, !tbaa !9
  %57 = sext i32 %56 to i64
  %58 = getelementptr inbounds i32, ptr %55, i64 %57
  store i32 %54, ptr %58, align 4, !tbaa !9
  %59 = load i32, ptr %6, align 4, !tbaa !9
  %60 = load ptr, ptr %3, align 8, !tbaa !5
  %61 = load i32, ptr %5, align 4, !tbaa !9
  %62 = sext i32 %61 to i64
  %63 = getelementptr inbounds i32, ptr %60, i64 %62
  store i32 %59, ptr %63, align 4, !tbaa !9
  br label %64

64:                                               ; preds = %44, %40
  br label %65

65:                                               ; preds = %64
  %66 = load i32, ptr %8, align 4, !tbaa !9
  %67 = add nsw i32 %66, 1
  store i32 %67, ptr %8, align 4, !tbaa !9
  br label %9, !llvm.loop !13

68:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret void
}

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 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @select_sort(ptr nocapture noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 0
  br i1 %3, label %.lr.ph30.preheader, label %._crit_edge31

.lr.ph30.preheader:                               ; preds = %2
  %4 = zext nneg i32 %1 to i64
  %wide.trip.count38 = zext nneg i32 %1 to i64
  br label %.lr.ph30

._crit_edge31:                                    ; preds = %21, %2
  ret void

.lr.ph30:                                         ; preds = %.lr.ph30.preheader, %21
  %indvars.iv35 = phi i64 [ 0, %.lr.ph30.preheader ], [ %indvars.iv.next36, %21 ]
  %indvars.iv = phi i64 [ 1, %.lr.ph30.preheader ], [ %indvars.iv.next, %21 ]
  %indvars.iv.next36 = add nuw nsw i64 %indvars.iv35, 1
  %5 = icmp ult i64 %indvars.iv.next36, %4
  %6 = trunc nuw nsw i64 %indvars.iv35 to i32
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph30, %.lr.ph
  %indvars.iv32 = phi i64 [ %indvars.iv.next33, %.lr.ph ], [ %indvars.iv, %.lr.ph30 ]
  %.02426 = phi i32 [ %spec.select, %.lr.ph ], [ %6, %.lr.ph30 ]
  %7 = sext i32 %.02426 to i64
  %8 = getelementptr inbounds i32, ptr %0, i64 %7
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv32
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = icmp sgt i32 %9, %11
  %13 = trunc nuw nsw i64 %indvars.iv32 to i32
  %spec.select = select i1 %12, i32 %13, i32 %.02426
  %indvars.iv.next33 = add nuw nsw i64 %indvars.iv32, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next33, %wide.trip.count38
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph30
  %.024.lcssa = phi i32 [ %6, %.lr.ph30 ], [ %spec.select, %.lr.ph ]
  %14 = zext i32 %.024.lcssa to i64
  %.not = icmp eq i64 %indvars.iv35, %14
  br i1 %.not, label %21, label %15

15:                                               ; preds = %._crit_edge
  %16 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv35
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = sext i32 %.024.lcssa to i64
  %19 = getelementptr inbounds i32, ptr %0, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !5
  store i32 %20, ptr %16, align 4, !tbaa !5
  store i32 %17, ptr %19, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %._crit_edge, %15
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond39.not = icmp eq i64 %indvars.iv.next36, %wide.trip.count38
  br i1 %exitcond39.not, label %._crit_edge31, label %.lr.ph30, !llvm.loop !11
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass