; LLVM IR from int32bit/leetcode :: algorithms/MergekSortedLists/TLE_solve.ll (Z7mk_listPii)

; 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"

%struct.ListNode = type { i32, ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) unnamed_addr #2 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #3

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z7mk_listPii(ptr noundef %0, i32 noundef %1) #4 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  %11 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %12 = load i32, ptr %5, align 4, !tbaa !9
  %13 = icmp slt i32 %12, 1
  br i1 %13, label %14, label %15

14:                                               ; preds = %2
  store ptr null, ptr %3, align 8
  br label %53

15:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  %16 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #6
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds i32, ptr %17, i64 0
  %19 = load i32, ptr %18, align 4, !tbaa !9
  invoke void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %16, i32 noundef %19)
          to label %20 unwind label %27

20:                                               ; preds = %15
  store ptr %16, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #5
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %21, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #5
  store i32 1, ptr %10, align 4, !tbaa !9
  br label %22

22:                                               ; preds = %43, %20
  %23 = load i32, ptr %10, align 4, !tbaa !9
  %24 = load i32, ptr %5, align 4, !tbaa !9
  %25 = icmp slt i32 %23, %24
  br i1 %25, label %31, label %26

26:                                               ; preds = %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #5
  br label %50

27:                                               ; preds = %15
  %28 = landingpad { ptr, i32 }
          cleanup
  %29 = extractvalue { ptr, i32 } %28, 0
  store ptr %29, ptr %7, align 8
  %30 = extractvalue { ptr, i32 } %28, 1
  store i32 %30, ptr %8, align 4
  call void @_ZdlPvm(ptr noundef %16, i64 noundef 16) #7
  br label %52

31:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #5
  %32 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #6
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = load i32, ptr %10, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds i32, ptr %33, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !9
  invoke void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %32, i32 noundef %37)
          to label %38 unwind label %46

38:                                               ; preds = %31
  store ptr %32, ptr %11, align 8, !tbaa !5
  %39 = load ptr, ptr %11, align 8, !tbaa !5
  %40 = load ptr, ptr %9, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.ListNode, ptr %40, i32 0, i32 1
  store ptr %39, ptr %41, align 8, !tbaa !11
  %42 = load ptr, ptr %11, align 8, !tbaa !5
  store ptr %42, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #5
  br label %43

43:                                               ; preds = %38
  %44 = load i32, ptr %10, align 4, !tbaa !9
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %10, align 4, !tbaa !9
  br label %22, !llvm.loop !13

46:                                               ; preds = %31
  %47 = landingpad { ptr, i32 }
          cleanup
  %48 = extractvalue { ptr, i32 } %47, 0
  store ptr %48, ptr %7, align 8
  %49 = extractvalue { ptr, i32 } %47, 1
  store i32 %49, ptr %8, align 4
  call void @_ZdlPvm(ptr noundef %32, i64 noundef 16) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  br label %52

50:                                               ; preds = %26
  %51 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %51, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  br label %53

52:                                               ; preds = %46, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  br label %55

53:                                               ; preds = %50, %14
  %54 = load ptr, ptr %3, align 8
  ret ptr %54

55:                                               ; preds = %52
  %56 = load ptr, ptr %7, align 8
  %57 = load i32, ptr %8, align 4
  %58 = insertvalue { ptr, i32 } poison, ptr %56, 0
  %59 = insertvalue { ptr, i32 } %58, i32 %57, 1
  resume { ptr, i32 } %59
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nobuiltin 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 #2 = { 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 = { nobuiltin 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 = { 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 #5 = { nounwind }
attributes #6 = { builtin allocsize(0) }
attributes #7 = { builtin 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 8}
!12 = !{!"_ZTS8ListNode", !10, i64 0, !6, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"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: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) unnamed_addr #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z7mk_listPii(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #2 personality ptr @__gxx_personality_v0 {
  %3 = icmp slt i32 %1, 1
  br i1 %3, label %.loopexit, label %4

4:                                                ; preds = %2
  %5 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #3
  %6 = load i32, ptr %0, align 4, !tbaa !5
  tail call void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %5, i32 noundef %6)
  %.not = icmp eq i32 %1, 1
  br i1 %.not, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %4
  %wide.trip.count = zext nneg i32 %1 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 1, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %.01315 = phi ptr [ %5, %.lr.ph.preheader ], [ %7, %.lr.ph ]
  %7 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #3
  %8 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %9 = load i32, ptr %8, align 4, !tbaa !5
  tail call void @_ZN8ListNodeC2Ei(ptr noundef nonnull align 8 dereferenceable(16) %7, i32 noundef %9)
  %10 = getelementptr inbounds i8, ptr %.01315, i64 8
  store ptr %7, ptr %10, align 8, !tbaa !9
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.loopexit, label %.lr.ph, !llvm.loop !12

.loopexit:                                        ; preds = %.lr.ph, %4, %2
  %.0 = phi ptr [ null, %2 ], [ %5, %4 ], [ %5, %.lr.ph ]
  ret ptr %.0
}

attributes #0 = { nobuiltin 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 #1 = { 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 #2 = { 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 #3 = { builtin 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 8}
!10 = !{!"_ZTS8ListNode", !6, i64 0, !11, i64 8}
!11 = !{!"any pointer", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass