; LLVM IR from Hunterdii/GeeksforGeeks-POTD :: November 2024 GFG SOLUTION (November-24)

; 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"

@stdin = external global ptr, align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local i64 @maxSubarraySum(ptr noundef, i32 noundef) #0

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

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

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca [1001 x i8], align 16
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i64, align 8
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 1001, ptr %2) #7
  %14 = getelementptr inbounds [1001 x i8], ptr %2, i64 0, i64 0
  %15 = load ptr, ptr @stdin, align 8, !tbaa !5
  %16 = call ptr @fgets(ptr noundef %14, i32 noundef 1001, ptr noundef %15)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #7
  %17 = getelementptr inbounds [1001 x i8], ptr %2, i64 0, i64 0
  %18 = call i32 @atoi(ptr noundef %17) #8
  store i32 %18, ptr %3, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %63, %0
  %20 = load i32, ptr %3, align 4, !tbaa !9
  %21 = add nsw i32 %20, -1
  store i32 %21, ptr %3, align 4, !tbaa !9
  %22 = icmp ne i32 %20, 0
  br i1 %22, label %23, label %73

23:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #7
  store ptr null, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #7
  store i64 0, ptr %5, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #7
  %24 = load ptr, ptr @stdin, align 8, !tbaa !5
  %25 = call i64 @getline(ptr noundef %4, ptr noundef %5, ptr noundef %24)
  store i64 %25, ptr %6, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #7
  %26 = call noalias ptr @malloc(i64 noundef 4000000) #9
  store ptr %26, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #7
  store i32 0, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #7
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = call ptr @strtok(ptr noundef %27, ptr noundef @.str) #7
  store ptr %28, ptr %9, align 8, !tbaa !5
  br label %29

29:                                               ; preds = %32, %23
  %30 = load ptr, ptr %9, align 8, !tbaa !5
  %31 = icmp ne ptr %30, null
  br i1 %31, label %32, label %41

32:                                               ; preds = %29
  %33 = load ptr, ptr %9, align 8, !tbaa !5
  %34 = call i32 @atoi(ptr noundef %33) #8
  %35 = load ptr, ptr %7, align 8, !tbaa !5
  %36 = load i32, ptr %8, align 4, !tbaa !9
  %37 = add nsw i32 %36, 1
  store i32 %37, ptr %8, align 4, !tbaa !9
  %38 = sext i32 %36 to i64
  %39 = getelementptr inbounds i32, ptr %35, i64 %38
  store i32 %34, ptr %39, align 4, !tbaa !9
  %40 = call ptr @strtok(ptr noundef null, ptr noundef @.str) #7
  store ptr %40, ptr %9, align 8, !tbaa !5
  br label %29, !llvm.loop !13

41:                                               ; preds = %29
  %42 = load i32, ptr %8, align 4, !tbaa !9
  %43 = zext i32 %42 to i64
  %44 = call ptr @llvm.stacksave.p0()
  store ptr %44, ptr %10, align 8
  %45 = alloca i32, i64 %43, align 16
  store i64 %43, ptr %11, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #7
  store i32 0, ptr %12, align 4, !tbaa !9
  br label %46

46:                                               ; preds = %60, %41
  %47 = load i32, ptr %12, align 4, !tbaa !9
  %48 = load i32, ptr %8, align 4, !tbaa !9
  %49 = icmp slt i32 %47, %48
  br i1 %49, label %51, label %50

50:                                               ; preds = %46
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #7
  br label %63

51:                                               ; preds = %46
  %52 = load ptr, ptr %7, align 8, !tbaa !5
  %53 = load i32, ptr %12, align 4, !tbaa !9
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds i32, ptr %52, i64 %54
  %56 = load i32, ptr %55, align 4, !tbaa !9
  %57 = load i32, ptr %12, align 4, !tbaa !9
  %58 = sext i32 %57 to i64
  %59 = getelementptr inbounds i32, ptr %45, i64 %58
  store i32 %56, ptr %59, align 4, !tbaa !9
  br label %60

60:                                               ; preds = %51
  %61 = load i32, ptr %12, align 4, !tbaa !9
  %62 = add nsw i32 %61, 1
  store i32 %62, ptr %12, align 4, !tbaa !9
  br label %46, !llvm.loop !15

63:                                               ; preds = %50
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #7
  %64 = load i32, ptr %8, align 4, !tbaa !9
  %65 = call i64 @maxSubarraySum(ptr noundef %45, i32 noundef %64)
  %66 = trunc i64 %65 to i32
  store i32 %66, ptr %13, align 4, !tbaa !9
  %67 = load i32, ptr %13, align 4, !tbaa !9
  %68 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %67)
  %69 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, ptr noundef @.str.3)
  %70 = load ptr, ptr %7, align 8, !tbaa !5
  call void @free(ptr noundef %70) #7
  %71 = load ptr, ptr %4, align 8, !tbaa !5
  call void @free(ptr noundef %71) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #7
  %72 = load ptr, ptr %10, align 8
  call void @llvm.stackrestore.p0(ptr %72)
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #7
  br label %19, !llvm.loop !16

73:                                               ; preds = %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #7
  call void @llvm.lifetime.end.p0(i64 1001, ptr %2) #7
  ret i32 0
}

declare ptr @fgets(ptr noundef, i32 noundef, ptr noundef) #2

; Function Attrs: inlinehint nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr noundef nonnull) #3

declare i64 @getline(ptr noundef, ptr noundef, ptr noundef) #2

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #4

; Function Attrs: nounwind
declare ptr @strtok(ptr noundef, ptr noundef) #5

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #6

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

; Function Attrs: nounwind
declare void @free(ptr noundef) #5

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #6

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 = { inlinehint nounwind willreturn memory(read) 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 #4 = { nounwind allocsize(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 #5 = { 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 #6 = { nocallback nofree nosync nounwind willreturn }
attributes #7 = { nounwind }
attributes #8 = { nounwind willreturn memory(read) }
attributes #9 = { nounwind allocsize(0) }

!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 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}
!16 = distinct !{!16, !14}


; 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"

@stdin = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [2 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local i64 @maxSubarraySum(ptr noundef, i32 noundef) local_unnamed_addr #0

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

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

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca [0 x i32], align 16
  %2 = alloca [1001 x i8], align 16
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 1001, ptr nonnull %2) #10
  %5 = load ptr, ptr @stdin, align 8, !tbaa !5
  %6 = call ptr @fgets(ptr noundef nonnull %2, i32 noundef 1001, ptr noundef %5)
  %7 = call i32 @atoi(ptr nocapture noundef %2) #11
  %.not26 = icmp eq i32 %7, 0
  br i1 %.not26, label %._crit_edge29, label %.lr.ph28

.lr.ph28:                                         ; preds = %0, %._crit_edge25
  %.in = phi i32 [ %8, %._crit_edge25 ], [ %7, %0 ]
  %8 = add nsw i32 %.in, -1
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #10
  store ptr null, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #10
  store i64 0, ptr %4, align 8, !tbaa !9
  %9 = load ptr, ptr @stdin, align 8, !tbaa !5
  %10 = call i64 @getline(ptr noundef nonnull %3, ptr noundef nonnull %4, ptr noundef %9) #10
  %11 = call noalias dereferenceable_or_null(4000000) ptr @malloc(i64 noundef 4000000) #12
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = call ptr @strtok(ptr noundef %12, ptr noundef nonnull @.str) #10
  %.not1819 = icmp eq ptr %13, null
  br i1 %.not1819, label %._crit_edge.thread, label %.lr.ph

._crit_edge.thread:                               ; preds = %.lr.ph28
  %14 = call ptr @llvm.stacksave.p0()
  br label %._crit_edge25

.lr.ph:                                           ; preds = %.lr.ph28, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.lr.ph28 ]
  %.01720 = phi ptr [ %17, %.lr.ph ], [ %13, %.lr.ph28 ]
  %15 = call i32 @atoi(ptr nocapture noundef %.01720) #11
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %16 = getelementptr inbounds i32, ptr %11, i64 %indvars.iv
  store i32 %15, ptr %16, align 4, !tbaa !11
  %17 = call ptr @strtok(ptr noundef null, ptr noundef nonnull @.str) #10
  %.not18 = icmp eq ptr %17, null
  br i1 %.not18, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph
  %18 = and i64 %indvars.iv.next, 4294967295
  %19 = call ptr @llvm.stacksave.p0()
  %20 = alloca i32, i64 %18, align 16
  %21 = trunc nuw i64 %indvars.iv.next to i32
  %22 = shl nuw nsw i64 %18, 2
  call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 16 %20, ptr nonnull align 4 %11, i64 %22, i1 false), !tbaa !11
  br label %._crit_edge25

._crit_edge25:                                    ; preds = %._crit_edge.thread, %._crit_edge
  %23 = phi ptr [ %1, %._crit_edge.thread ], [ %20, %._crit_edge ]
  %24 = phi ptr [ %14, %._crit_edge.thread ], [ %19, %._crit_edge ]
  %.016.lcssa37 = phi i32 [ 0, %._crit_edge.thread ], [ %21, %._crit_edge ]
  %25 = call i64 @maxSubarraySum(ptr noundef nonnull %23, i32 noundef %.016.lcssa37)
  %26 = trunc i64 %25 to i32
  %27 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %26)
  %28 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, ptr noundef nonnull @.str.3)
  call void @free(ptr noundef %11) #10
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  call void @free(ptr noundef %29) #10
  call void @llvm.stackrestore.p0(ptr %24)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #10
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #10
  %.not = icmp eq i32 %8, 0
  br i1 %.not, label %._crit_edge29, label %.lr.ph28, !llvm.loop !15

._crit_edge29:                                    ; preds = %._crit_edge25, %0
  call void @llvm.lifetime.end.p0(i64 1001, ptr nonnull %2) #10
  ret i32 0
}

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

; Function Attrs: inlinehint mustprogress nofree nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr nocapture noundef nonnull) local_unnamed_addr #3

declare i64 @getline(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #4

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #5

; Function Attrs: mustprogress nofree nounwind willreturn
declare ptr @strtok(ptr noundef, ptr nocapture noundef readonly) local_unnamed_addr #6

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #7

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

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #8

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #7

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #9

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 = { 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 = { inlinehint mustprogress nofree nounwind willreturn memory(read) 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 #4 = { "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 #5 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 #6 = { mustprogress nofree nounwind willreturn "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 #7 = { mustprogress nocallback nofree nosync nounwind willreturn }
attributes #8 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 #9 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #10 = { nounwind }
attributes #11 = { nounwind willreturn memory(read) }
attributes #12 = { nounwind allocsize(0) }

!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, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


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