; LLVM IR from lolosssss/leetcode :: c (206_reverse_linked_list)

; 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"

@__const.main.arr = external hidden unnamed_addr constant [10 x i32], align 16
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

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

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

; Function Attrs: nounwind uwtable
declare dso_local void @printList(ptr noundef) #0

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

; Function Attrs: nounwind uwtable
declare dso_local void @freeList(ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca ptr, align 8
  %3 = alloca [10 x i32], align 16
  %4 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #4
  store ptr null, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 40, ptr %3) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %3, ptr align 16 @__const.main.arr, i64 40, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  store i32 1, ptr %4, align 4, !tbaa !9
  br label %5

5:                                                ; preds = %19, %0
  %6 = load i32, ptr %4, align 4, !tbaa !9
  %7 = icmp slt i32 %6, 11
  br i1 %7, label %9, label %8

8:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  br label %22

9:                                                ; preds = %5
  %10 = getelementptr inbounds [10 x i32], ptr %3, i64 0, i64 0
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = call ptr @createList(ptr noundef %10, i32 noundef %11)
  store ptr %12, ptr %2, align 8, !tbaa !5
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  call void @printList(ptr noundef %13)
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = call ptr @reverseList(ptr noundef %14)
  store ptr %15, ptr %2, align 8, !tbaa !5
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  call void @printList(ptr noundef %16)
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  call void @freeList(ptr noundef %17)
  %18 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %19

19:                                               ; preds = %9
  %20 = load i32, ptr %4, align 4, !tbaa !9
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %4, align 4, !tbaa !9
  br label %5, !llvm.loop !11

22:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 40, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #4
  ret i32 0
}

; 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) #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 nounwind willreturn memory(argmem: readwrite) }
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 = !{!"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"}


; 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"

@__const.main.arr = external hidden unnamed_addr constant [10 x i32], align 16
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

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

; Function Attrs: nounwind uwtable
declare dso_local void @printList(ptr noundef) local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
declare dso_local void @freeList(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca [10 x i32], align 16
  call void @llvm.lifetime.start.p0(i64 40, ptr nonnull %1) #4
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(40) %1, ptr noundef nonnull align 16 dereferenceable(40) @__const.main.arr, i64 40, i1 false)
  %2 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 1)
  call void @printList(ptr noundef %2)
  %3 = call ptr @reverseList(ptr noundef %2)
  call void @printList(ptr noundef %3)
  call void @freeList(ptr noundef %3)
  %4 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %5 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 2)
  call void @printList(ptr noundef %5)
  %6 = call ptr @reverseList(ptr noundef %5)
  call void @printList(ptr noundef %6)
  call void @freeList(ptr noundef %6)
  %7 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %8 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 3)
  call void @printList(ptr noundef %8)
  %9 = call ptr @reverseList(ptr noundef %8)
  call void @printList(ptr noundef %9)
  call void @freeList(ptr noundef %9)
  %10 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %11 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 4)
  call void @printList(ptr noundef %11)
  %12 = call ptr @reverseList(ptr noundef %11)
  call void @printList(ptr noundef %12)
  call void @freeList(ptr noundef %12)
  %13 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %14 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 5)
  call void @printList(ptr noundef %14)
  %15 = call ptr @reverseList(ptr noundef %14)
  call void @printList(ptr noundef %15)
  call void @freeList(ptr noundef %15)
  %16 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %17 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 6)
  call void @printList(ptr noundef %17)
  %18 = call ptr @reverseList(ptr noundef %17)
  call void @printList(ptr noundef %18)
  call void @freeList(ptr noundef %18)
  %19 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %20 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 7)
  call void @printList(ptr noundef %20)
  %21 = call ptr @reverseList(ptr noundef %20)
  call void @printList(ptr noundef %21)
  call void @freeList(ptr noundef %21)
  %22 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %23 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 8)
  call void @printList(ptr noundef %23)
  %24 = call ptr @reverseList(ptr noundef %23)
  call void @printList(ptr noundef %24)
  call void @freeList(ptr noundef %24)
  %25 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %26 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 9)
  call void @printList(ptr noundef %26)
  %27 = call ptr @reverseList(ptr noundef %26)
  call void @printList(ptr noundef %27)
  call void @freeList(ptr noundef %27)
  %28 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %29 = call ptr @createList(ptr noundef nonnull %1, i32 noundef 10)
  call void @printList(ptr noundef %29)
  %30 = call ptr @reverseList(ptr noundef %29)
  call void @printList(ptr noundef %30)
  call void @freeList(ptr noundef %30)
  %31 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  call void @llvm.lifetime.end.p0(i64 40, ptr nonnull %1) #4
  ret i32 0
}

; Function Attrs: mustprogress 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) #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 = { 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 nounwind willreturn memory(argmem: readwrite) }
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)"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass