; LLVM IR from begeekmyfriend/leetcode :: 0354_russian_doll_envelopes (russian_doll)

; 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"

@stderr = external global ptr, align 8
@.str = external hidden unnamed_addr constant [29 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local i32 @maxEnvelopes(ptr noundef, i32 noundef, ptr 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: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; 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(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  store i32 0, ptr %3, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = icmp slt i32 %10, 3
  br i1 %11, label %16, label %12

12:                                               ; preds = %2
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = srem i32 %13, 2
  %15 = icmp eq i32 %14, 0
  br i1 %15, label %16, label %19

16:                                               ; preds = %12, %2
  %17 = load ptr, ptr @stderr, align 8, !tbaa !9
  %18 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %17, ptr noundef @.str) #7
  call void @exit(i32 noundef -1) #8
  unreachable

19:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #7
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #7
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = sub nsw i32 %20, 1
  %22 = sdiv i32 %21, 2
  store i32 %22, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #7
  %23 = load i32, ptr %7, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = mul i64 %24, 4
  %26 = call noalias ptr @malloc(i64 noundef %25) #9
  store ptr %26, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #7
  %27 = load i32, ptr %7, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = mul i64 %28, 8
  %30 = call noalias ptr @malloc(i64 noundef %29) #9
  store ptr %30, ptr %9, align 8, !tbaa !9
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %31

31:                                               ; preds = %80, %19
  %32 = load i32, ptr %6, align 4, !tbaa !5
  %33 = load i32, ptr %7, align 4, !tbaa !5
  %34 = icmp slt i32 %32, %33
  br i1 %34, label %35, label %83

35:                                               ; preds = %31
  %36 = load ptr, ptr %8, align 8, !tbaa !9
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds i32, ptr %36, i64 %38
  store i32 2, ptr %39, align 4, !tbaa !5
  %40 = load ptr, ptr %8, align 8, !tbaa !9
  %41 = load i32, ptr %6, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds i32, ptr %40, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !5
  %45 = sext i32 %44 to i64
  %46 = mul i64 %45, 4
  %47 = call noalias ptr @malloc(i64 noundef %46) #9
  %48 = load ptr, ptr %9, align 8, !tbaa !9
  %49 = load i32, ptr %6, align 4, !tbaa !5
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds ptr, ptr %48, i64 %50
  store ptr %47, ptr %51, align 8, !tbaa !9
  %52 = load ptr, ptr %5, align 8, !tbaa !9
  %53 = load i32, ptr %6, align 4, !tbaa !5
  %54 = mul nsw i32 %53, 2
  %55 = add nsw i32 %54, 1
  %56 = sext i32 %55 to i64
  %57 = getelementptr inbounds ptr, ptr %52, i64 %56
  %58 = load ptr, ptr %57, align 8, !tbaa !9
  %59 = call i32 @atoi(ptr noundef %58) #10
  %60 = load ptr, ptr %9, align 8, !tbaa !9
  %61 = load i32, ptr %6, align 4, !tbaa !5
  %62 = sext i32 %61 to i64
  %63 = getelementptr inbounds ptr, ptr %60, i64 %62
  %64 = load ptr, ptr %63, align 8, !tbaa !9
  %65 = getelementptr inbounds i32, ptr %64, i64 0
  store i32 %59, ptr %65, align 4, !tbaa !5
  %66 = load ptr, ptr %5, align 8, !tbaa !9
  %67 = load i32, ptr %6, align 4, !tbaa !5
  %68 = mul nsw i32 %67, 2
  %69 = add nsw i32 %68, 2
  %70 = sext i32 %69 to i64
  %71 = getelementptr inbounds ptr, ptr %66, i64 %70
  %72 = load ptr, ptr %71, align 8, !tbaa !9
  %73 = call i32 @atoi(ptr noundef %72) #10
  %74 = load ptr, ptr %9, align 8, !tbaa !9
  %75 = load i32, ptr %6, align 4, !tbaa !5
  %76 = sext i32 %75 to i64
  %77 = getelementptr inbounds ptr, ptr %74, i64 %76
  %78 = load ptr, ptr %77, align 8, !tbaa !9
  %79 = getelementptr inbounds i32, ptr %78, i64 1
  store i32 %73, ptr %79, align 4, !tbaa !5
  br label %80

80:                                               ; preds = %35
  %81 = load i32, ptr %6, align 4, !tbaa !5
  %82 = add nsw i32 %81, 1
  store i32 %82, ptr %6, align 4, !tbaa !5
  br label %31, !llvm.loop !11

83:                                               ; preds = %31
  %84 = load ptr, ptr %9, align 8, !tbaa !9
  %85 = load i32, ptr %7, align 4, !tbaa !5
  %86 = load ptr, ptr %8, align 8, !tbaa !9
  %87 = call i32 @maxEnvelopes(ptr noundef %84, i32 noundef %85, ptr noundef %86)
  %88 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %87)
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #7
  ret i32 0
}

; Function Attrs: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #3

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) #4

; Function Attrs: inlinehint nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr noundef nonnull) #5

declare i32 @printf(ptr noundef, ...) #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 = { 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 #3 = { 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 #4 = { noreturn 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 #5 = { 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 #6 = { "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 = { nounwind }
attributes #8 = { noreturn nounwind }
attributes #9 = { nounwind allocsize(0) }
attributes #10 = { nounwind willreturn memory(read) }

!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 = !{!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"

@stderr = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [29 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

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

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = icmp slt i32 %0, 3
  %4 = and i32 %0, 1
  %5 = icmp eq i32 %4, 0
  %or.cond = or i1 %3, %5
  br i1 %or.cond, label %6, label %.lr.ph.preheader

6:                                                ; preds = %2
  %7 = load ptr, ptr @stderr, align 8, !tbaa !5
  %8 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %7, ptr noundef nonnull @.str) #5
  tail call void @exit(i32 noundef -1) #6
  unreachable

.lr.ph.preheader:                                 ; preds = %2
  %9 = add nsw i32 %0, -1
  %10 = lshr exact i32 %9, 1
  %11 = zext nneg i32 %10 to i64
  %12 = shl nuw nsw i64 %11, 2
  %13 = tail call noalias ptr @malloc(i64 noundef %12) #7
  %14 = shl nuw nsw i64 %11, 3
  %15 = tail call noalias ptr @malloc(i64 noundef %14) #7
  %invariant.gep = getelementptr inbounds i8, ptr %1, i64 16
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %16 = getelementptr inbounds i32, ptr %13, i64 %indvars.iv
  store i32 2, ptr %16, align 4, !tbaa !9
  %17 = tail call noalias dereferenceable_or_null(8) ptr @malloc(i64 noundef 8) #7
  %18 = getelementptr inbounds ptr, ptr %15, i64 %indvars.iv
  store ptr %17, ptr %18, align 8, !tbaa !5
  %19 = shl nuw nsw i64 %indvars.iv, 1
  %20 = or disjoint i64 %19, 1
  %21 = getelementptr inbounds ptr, ptr %1, i64 %20
  %22 = load ptr, ptr %21, align 8, !tbaa !5
  %23 = tail call i32 @atoi(ptr nocapture noundef %22) #8
  store i32 %23, ptr %17, align 4, !tbaa !9
  %gep = getelementptr inbounds ptr, ptr %invariant.gep, i64 %19
  %24 = load ptr, ptr %gep, align 8, !tbaa !5
  %25 = tail call i32 @atoi(ptr nocapture noundef %24) #8
  %26 = getelementptr inbounds i8, ptr %17, i64 4
  store i32 %25, ptr %26, align 4, !tbaa !9
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %11
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph
  %27 = tail call i32 @maxEnvelopes(ptr noundef nonnull %15, i32 noundef %10, ptr noundef nonnull %13)
  %28 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %27)
  ret i32 0
}

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

; Function Attrs: noreturn nounwind
declare void @exit(i32 noundef) local_unnamed_addr #3

; Function Attrs: inlinehint mustprogress nofree nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr nocapture noundef nonnull) local_unnamed_addr #4

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

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 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 #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 = { noreturn 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 #4 = { 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 #5 = { cold nounwind }
attributes #6 = { noreturn nounwind }
attributes #7 = { nounwind allocsize(0) }
attributes #8 = { nounwind willreturn memory(read) }

!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"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass