; LLVM IR from HarshCasper/NeoAlgo :: C-Plus-Plus/cp/max_sum_subarray_of_size_k.ll (Z16max_sum_subarrayiPii)

; 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: mustprogress uwtable
define dso_local noundef i32 @_Z16max_sum_subarrayiPii(i32 noundef %0, ptr noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 -2147483648, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i32 0, ptr %9, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 0, ptr %10, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %54, %3
  %12 = load i32, ptr %10, align 4, !tbaa !5
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = icmp slt i32 %12, %13
  br i1 %14, label %15, label %55

15:                                               ; preds = %11
  %16 = load i32, ptr %7, align 4, !tbaa !5
  %17 = load ptr, ptr %5, align 8, !tbaa !9
  %18 = load i32, ptr %10, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds i32, ptr %17, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = add nsw i32 %16, %21
  store i32 %22, ptr %7, align 4, !tbaa !5
  %23 = load i32, ptr %10, align 4, !tbaa !5
  %24 = load i32, ptr %9, align 4, !tbaa !5
  %25 = sub nsw i32 %23, %24
  %26 = add nsw i32 %25, 1
  %27 = load i32, ptr %6, align 4, !tbaa !5
  %28 = icmp slt i32 %26, %27
  br i1 %28, label %29, label %32

29:                                               ; preds = %15
  %30 = load i32, ptr %10, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %10, align 4, !tbaa !5
  br label %54

32:                                               ; preds = %15
  %33 = load i32, ptr %10, align 4, !tbaa !5
  %34 = load i32, ptr %9, align 4, !tbaa !5
  %35 = sub nsw i32 %33, %34
  %36 = add nsw i32 %35, 1
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = icmp eq i32 %36, %37
  br i1 %38, label %39, label %53

39:                                               ; preds = %32
  %40 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %7, ptr noundef nonnull align 4 dereferenceable(4) %8)
  %41 = load i32, ptr %40, align 4, !tbaa !5
  store i32 %41, ptr %8, align 4, !tbaa !5
  %42 = load i32, ptr %7, align 4, !tbaa !5
  %43 = load ptr, ptr %5, align 8, !tbaa !9
  %44 = load i32, ptr %9, align 4, !tbaa !5
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds i32, ptr %43, i64 %45
  %47 = load i32, ptr %46, align 4, !tbaa !5
  %48 = sub nsw i32 %42, %47
  store i32 %48, ptr %7, align 4, !tbaa !5
  %49 = load i32, ptr %9, align 4, !tbaa !5
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr %9, align 4, !tbaa !5
  %51 = load i32, ptr %10, align 4, !tbaa !5
  %52 = add nsw i32 %51, 1
  store i32 %52, ptr %10, align 4, !tbaa !5
  br label %53

53:                                               ; preds = %39, %32
  br label %54

54:                                               ; preds = %53, %29
  br label %11, !llvm.loop !11

55:                                               ; preds = %11
  %56 = load i32, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  ret i32 %56
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { mustprogress 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint mustprogress 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 #3 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z16max_sum_subarrayiPii(i32 noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #3
  store i32 -2147483648, ptr %5, align 4, !tbaa !5
  %6 = icmp sgt i32 %0, 0
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %30
  %7 = phi i32 [ %31, %30 ], [ -2147483648, %3 ]
  %8 = phi i32 [ %32, %30 ], [ 0, %3 ]
  %.019 = phi i32 [ %.1, %30 ], [ 0, %3 ]
  %.01418 = phi i32 [ %.115, %30 ], [ 0, %3 ]
  %9 = sext i32 %.019 to i64
  %10 = getelementptr inbounds i32, ptr %1, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = add nsw i32 %11, %8
  store i32 %12, ptr %4, align 4, !tbaa !5
  %13 = sub nsw i32 %.019, %.01418
  %14 = add nsw i32 %13, 1
  %15 = icmp slt i32 %14, %2
  br i1 %15, label %16, label %18

16:                                               ; preds = %.lr.ph
  %17 = add nsw i32 %.019, 1
  br label %30

18:                                               ; preds = %.lr.ph
  %19 = icmp eq i32 %14, %2
  br i1 %19, label %20, label %30

20:                                               ; preds = %18
  %21 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %22 = load i32, ptr %21, align 4, !tbaa !5
  store i32 %22, ptr %5, align 4, !tbaa !5
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %.01418 to i64
  %25 = getelementptr inbounds i32, ptr %1, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = sub nsw i32 %23, %26
  store i32 %27, ptr %4, align 4, !tbaa !5
  %28 = add nsw i32 %.01418, 1
  %29 = add nsw i32 %.019, 1
  br label %30

30:                                               ; preds = %18, %20, %16
  %31 = phi i32 [ %7, %16 ], [ %22, %20 ], [ %7, %18 ]
  %32 = phi i32 [ %12, %16 ], [ %27, %20 ], [ %12, %18 ]
  %.115 = phi i32 [ %.01418, %16 ], [ %28, %20 ], [ %.01418, %18 ]
  %.1 = phi i32 [ %17, %16 ], [ %29, %20 ], [ %.019, %18 ]
  %33 = icmp slt i32 %.1, %0
  br i1 %33, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %30, %3
  %34 = phi i32 [ -2147483648, %3 ], [ %31, %30 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  ret i32 %34
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { mustprogress 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint mustprogress 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 #3 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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