; LLVM IR from HarshCasper/NeoAlgo :: C/cp (maxSubArraySum)

; 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"

@.str = external hidden unnamed_addr constant [29 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [26 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [32 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  %9 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %2)
  %11 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = zext i32 %12 to i64
  %14 = call ptr @llvm.stacksave.p0()
  store ptr %14, ptr %3, align 8
  %15 = alloca i32, i64 %13, align 16
  store i64 %13, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %26, %0
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %29

21:                                               ; preds = %16
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i32, ptr %15, i64 %23
  %25 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %24)
  br label %26

26:                                               ; preds = %21
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %5, align 4, !tbaa !5
  br label %16, !llvm.loop !9

29:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  %30 = getelementptr inbounds i32, ptr %15, i64 0
  %31 = load i32, ptr %30, align 16, !tbaa !5
  store i32 %31, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  %32 = getelementptr inbounds i32, ptr %15, i64 0
  %33 = load i32, ptr %32, align 16, !tbaa !5
  store i32 %33, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  store i32 1, ptr %8, align 4, !tbaa !5
  br label %34

34:                                               ; preds = %74, %29
  %35 = load i32, ptr %8, align 4, !tbaa !5
  %36 = load i32, ptr %2, align 4, !tbaa !5
  %37 = icmp slt i32 %35, %36
  br i1 %37, label %39, label %38

38:                                               ; preds = %34
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %77

39:                                               ; preds = %34
  %40 = load i32, ptr %8, align 4, !tbaa !5
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds i32, ptr %15, i64 %41
  %43 = load i32, ptr %42, align 4, !tbaa !5
  %44 = load i32, ptr %8, align 4, !tbaa !5
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds i32, ptr %15, i64 %45
  %47 = load i32, ptr %46, align 4, !tbaa !5
  %48 = load i32, ptr %7, align 4, !tbaa !5
  %49 = add nsw i32 %47, %48
  %50 = icmp sgt i32 %43, %49
  br i1 %50, label %51, label %56

51:                                               ; preds = %39
  %52 = load i32, ptr %8, align 4, !tbaa !5
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds i32, ptr %15, i64 %53
  %55 = load i32, ptr %54, align 4, !tbaa !5
  br label %63

56:                                               ; preds = %39
  %57 = load i32, ptr %8, align 4, !tbaa !5
  %58 = sext i32 %57 to i64
  %59 = getelementptr inbounds i32, ptr %15, i64 %58
  %60 = load i32, ptr %59, align 4, !tbaa !5
  %61 = load i32, ptr %7, align 4, !tbaa !5
  %62 = add nsw i32 %60, %61
  br label %63

63:                                               ; preds = %56, %51
  %64 = phi i32 [ %55, %51 ], [ %62, %56 ]
  store i32 %64, ptr %7, align 4, !tbaa !5
  %65 = load i32, ptr %7, align 4, !tbaa !5
  %66 = load i32, ptr %6, align 4, !tbaa !5
  %67 = icmp sgt i32 %65, %66
  br i1 %67, label %68, label %70

68:                                               ; preds = %63
  %69 = load i32, ptr %7, align 4, !tbaa !5
  br label %72

70:                                               ; preds = %63
  %71 = load i32, ptr %6, align 4, !tbaa !5
  br label %72

72:                                               ; preds = %70, %68
  %73 = phi i32 [ %69, %68 ], [ %71, %70 ]
  store i32 %73, ptr %6, align 4, !tbaa !5
  br label %74

74:                                               ; preds = %72
  %75 = load i32, ptr %8, align 4, !tbaa !5
  %76 = add nsw i32 %75, 1
  store i32 %76, ptr %8, align 4, !tbaa !5
  br label %34, !llvm.loop !11

77:                                               ; preds = %38
  %78 = load i32, ptr %6, align 4, !tbaa !5
  %79 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i32 noundef %78)
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  %80 = load ptr, ptr %3, align 8
  call void @llvm.stackrestore.p0(ptr %80)
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  %81 = load i32, ptr %1, align 4
  ret i32 %81
}

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

declare i32 @printf(ptr noundef, ...) #2

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #3

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

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #3

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 = { nocallback nofree nosync nounwind willreturn }
attributes #4 = { 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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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"

@.str = external hidden unnamed_addr constant [29 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [26 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [32 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #6
  %2 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %1)
  %4 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = zext i32 %5 to i64
  %7 = call ptr @llvm.stacksave.p0()
  %8 = alloca i32, i64 %6, align 16
  %9 = load i32, ptr %1, align 4, !tbaa !5
  %10 = icmp sgt i32 %9, 0
  call void @llvm.assume(i1 %10)
  br label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph
  %.pre = load i32, ptr %8, align 16, !tbaa !5
  %11 = icmp sgt i32 %16, 1
  br i1 %11, label %.lr.ph27.preheader, label %._crit_edge28

.lr.ph27.preheader:                               ; preds = %._crit_edge
  %wide.trip.count = zext nneg i32 %16 to i64
  %12 = add nsw i64 %wide.trip.count, -1
  %xtraiter = and i64 %12, 1
  %13 = icmp eq i32 %16, 2
  br i1 %13, label %._crit_edge28.loopexit.unr-lcssa, label %.lr.ph27.preheader.new

.lr.ph27.preheader.new:                           ; preds = %.lr.ph27.preheader
  %unroll_iter = and i64 %12, -2
  %invariant.gep = getelementptr inbounds i8, ptr %8, i64 4
  br label %.lr.ph27

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %14 = getelementptr inbounds i32, ptr %8, i64 %indvars.iv
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %14)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %16 = load i32, ptr %1, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = icmp slt i64 %indvars.iv.next, %17
  br i1 %18, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge28.loopexit.unr-lcssa:                 ; preds = %.lr.ph27, %.lr.ph27.preheader
  %.lcssa.ph = phi i32 [ poison, %.lr.ph27.preheader ], [ %33, %.lr.ph27 ]
  %indvars.iv33.unr = phi i64 [ 1, %.lr.ph27.preheader ], [ %indvars.iv.next34.1, %.lr.ph27 ]
  %.01724.unr = phi i32 [ %.pre, %.lr.ph27.preheader ], [ %32, %.lr.ph27 ]
  %.01823.unr = phi i32 [ %.pre, %.lr.ph27.preheader ], [ %33, %.lr.ph27 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge28, label %.lr.ph27.epil

.lr.ph27.epil:                                    ; preds = %._crit_edge28.loopexit.unr-lcssa
  %19 = getelementptr inbounds i32, ptr %8, i64 %indvars.iv33.unr
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = call i32 @llvm.smax.i32(i32 %.01724.unr, i32 0)
  %22 = add nsw i32 %20, %21
  %23 = call i32 @llvm.smax.i32(i32 %22, i32 %.01823.unr)
  br label %._crit_edge28

._crit_edge28:                                    ; preds = %.lr.ph27.epil, %._crit_edge28.loopexit.unr-lcssa, %._crit_edge
  %.018.lcssa = phi i32 [ %.pre, %._crit_edge ], [ %.lcssa.ph, %._crit_edge28.loopexit.unr-lcssa ], [ %23, %.lr.ph27.epil ]
  %24 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i32 noundef %.018.lcssa)
  call void @llvm.stackrestore.p0(ptr %7)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #6
  ret i32 0

.lr.ph27:                                         ; preds = %.lr.ph27, %.lr.ph27.preheader.new
  %indvars.iv33 = phi i64 [ 1, %.lr.ph27.preheader.new ], [ %indvars.iv.next34.1, %.lr.ph27 ]
  %.01724 = phi i32 [ %.pre, %.lr.ph27.preheader.new ], [ %32, %.lr.ph27 ]
  %.01823 = phi i32 [ %.pre, %.lr.ph27.preheader.new ], [ %33, %.lr.ph27 ]
  %niter = phi i64 [ 0, %.lr.ph27.preheader.new ], [ %niter.next.1, %.lr.ph27 ]
  %25 = getelementptr inbounds i32, ptr %8, i64 %indvars.iv33
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = call i32 @llvm.smax.i32(i32 %.01724, i32 0)
  %28 = add nsw i32 %26, %27
  %29 = call i32 @llvm.smax.i32(i32 %28, i32 %.01823)
  %gep = getelementptr inbounds i32, ptr %invariant.gep, i64 %indvars.iv33
  %30 = load i32, ptr %gep, align 4, !tbaa !5
  %31 = call i32 @llvm.smax.i32(i32 %28, i32 0)
  %32 = add nsw i32 %30, %31
  %33 = call i32 @llvm.smax.i32(i32 %32, i32 %29)
  %indvars.iv.next34.1 = add nuw nsw i64 %indvars.iv33, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge28.loopexit.unr-lcssa, label %.lr.ph27, !llvm.loop !11
}

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

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #3

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

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write)
declare void @llvm.assume(i1 noundef) #5

attributes #0 = { nofree 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 = { nofree nounwind "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 = { mustprogress nocallback nofree nosync nounwind willreturn }
attributes #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #5 = { nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write) }
attributes #6 = { 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/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,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass