; LLVM IR from xuxping/codelife :: algorthms/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 @insert_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
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = icmp eq ptr %8, null
  br i1 %9, label %13, label %10

10:                                               ; preds = %2
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = icmp sle i32 %11, 1
  br i1 %12, label %13, label %14

13:                                               ; preds = %10, %2
  br label %65

14:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 1, ptr %5, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %62, %14
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = load i32, ptr %4, align 4, !tbaa !9
  %18 = icmp slt i32 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %65

20:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = load i32, ptr %5, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i32, ptr %21, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !9
  store i32 %25, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %26 = load i32, ptr %5, align 4, !tbaa !9
  %27 = sub nsw i32 %26, 1
  store i32 %27, ptr %7, align 4, !tbaa !9
  br label %28

28:                                               ; preds = %52, %20
  %29 = load i32, ptr %7, align 4, !tbaa !9
  %30 = icmp sge i32 %29, 0
  br i1 %30, label %31, label %55

31:                                               ; preds = %28
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = load i32, ptr %7, align 4, !tbaa !9
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds i32, ptr %32, i64 %34
  %36 = load i32, ptr %35, align 4, !tbaa !9
  %37 = load i32, ptr %6, align 4, !tbaa !9
  %38 = icmp sgt i32 %36, %37
  br i1 %38, label %39, label %50

39:                                               ; preds = %31
  %40 = load ptr, ptr %3, align 8, !tbaa !5
  %41 = load i32, ptr %7, align 4, !tbaa !9
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds i32, ptr %40, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !9
  %45 = load ptr, ptr %3, align 8, !tbaa !5
  %46 = load i32, ptr %7, align 4, !tbaa !9
  %47 = add nsw i32 %46, 1
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds i32, ptr %45, i64 %48
  store i32 %44, ptr %49, align 4, !tbaa !9
  br label %51

50:                                               ; preds = %31
  br label %55

51:                                               ; preds = %39
  br label %52

52:                                               ; preds = %51
  %53 = load i32, ptr %7, align 4, !tbaa !9
  %54 = add nsw i32 %53, -1
  store i32 %54, ptr %7, align 4, !tbaa !9
  br label %28, !llvm.loop !11

55:                                               ; preds = %50, %28
  %56 = load i32, ptr %6, align 4, !tbaa !9
  %57 = load ptr, ptr %3, align 8, !tbaa !5
  %58 = load i32, ptr %7, align 4, !tbaa !9
  %59 = add nsw i32 %58, 1
  %60 = sext i32 %59 to i64
  %61 = getelementptr inbounds i32, ptr %57, i64 %60
  store i32 %56, ptr %61, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %62

62:                                               ; preds = %55
  %63 = load i32, ptr %5, align 4, !tbaa !9
  %64 = add nsw i32 %63, 1
  store i32 %64, ptr %5, align 4, !tbaa !9
  br label %15, !llvm.loop !13

65:                                               ; preds = %19, %13
  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 @insert_sort(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  %4 = icmp slt i32 %1, 2
  %or.cond = or i1 %3, %4
  br i1 %or.cond, label %.loopexit, label %.preheader.preheader

.preheader.preheader:                             ; preds = %2
  %wide.trip.count = zext nneg i32 %1 to i64
  br label %.preheader

.preheader:                                       ; preds = %.preheader.preheader, %15
  %indvars.iv = phi i64 [ 1, %.preheader.preheader ], [ %indvars.iv.next, %15 ]
  %5 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %6 = load i32, ptr %5, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %.preheader, %12
  %indvars.iv28 = phi i64 [ %indvars.iv, %.preheader ], [ %indvars.iv.next29, %12 ]
  %indvars.iv.next29 = add nsw i64 %indvars.iv28, -1
  %8 = and i64 %indvars.iv.next29, 4294967295
  %9 = getelementptr inbounds i32, ptr %0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = icmp sgt i32 %10, %6
  br i1 %11, label %12, label %15

12:                                               ; preds = %7
  %13 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv28
  store i32 %10, ptr %13, align 4, !tbaa !5
  %14 = icmp sgt i64 %indvars.iv28, 1
  br i1 %14, label %7, label %15, !llvm.loop !9

15:                                               ; preds = %7, %12
  %.0.in.lcssa = phi i64 [ %indvars.iv28, %7 ], [ 0, %12 ]
  %sext = shl i64 %.0.in.lcssa, 32
  %16 = ashr exact i64 %sext, 30
  %17 = getelementptr inbounds i8, ptr %0, i64 %16
  store i32 %6, ptr %17, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.loopexit, label %.preheader, !llvm.loop !11

.loopexit:                                        ; preds = %15, %2
  ret void
}

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,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass