; LLVM IR from wuzhouhui/leetcode :: 155_min_stack (minStackPush)

; 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.node = type { i32, ptr }
%struct.MinStack = type { ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local void @minStackPush(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = icmp ne ptr %7, null
  br i1 %8, label %10, label %9

9:                                                ; preds = %2
  store i32 1, ptr %6, align 4
  br label %49

10:                                               ; preds = %2
  %11 = call noalias ptr @malloc(i64 noundef 16) #4
  store ptr %11, ptr %5, align 8, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.node, ptr %13, i32 0, i32 0
  store i32 %12, ptr %14, align 8, !tbaa !11
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.MinStack, ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !13
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.node, ptr %18, i32 0, i32 1
  store ptr %17, ptr %19, align 8, !tbaa !15
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.MinStack, ptr %21, i32 0, i32 0
  store ptr %20, ptr %22, align 8, !tbaa !13
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.MinStack, ptr %23, i32 0, i32 1
  %25 = load ptr, ptr %24, align 8, !tbaa !16
  %26 = icmp ne ptr %25, null
  br i1 %26, label %27, label %35

27:                                               ; preds = %10
  %28 = load i32, ptr %4, align 4, !tbaa !9
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.MinStack, ptr %29, i32 0, i32 1
  %31 = load ptr, ptr %30, align 8, !tbaa !16
  %32 = getelementptr inbounds %struct.node, ptr %31, i32 0, i32 0
  %33 = load i32, ptr %32, align 8, !tbaa !11
  %34 = icmp sle i32 %28, %33
  br i1 %34, label %35, label %48

35:                                               ; preds = %27, %10
  %36 = call noalias ptr @malloc(i64 noundef 16) #4
  store ptr %36, ptr %5, align 8, !tbaa !5
  %37 = load i32, ptr %4, align 4, !tbaa !9
  %38 = load ptr, ptr %5, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.node, ptr %38, i32 0, i32 0
  store i32 %37, ptr %39, align 8, !tbaa !11
  %40 = load ptr, ptr %3, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.MinStack, ptr %40, i32 0, i32 1
  %42 = load ptr, ptr %41, align 8, !tbaa !16
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  %44 = getelementptr inbounds %struct.node, ptr %43, i32 0, i32 1
  store ptr %42, ptr %44, align 8, !tbaa !15
  %45 = load ptr, ptr %5, align 8, !tbaa !5
  %46 = load ptr, ptr %3, align 8, !tbaa !5
  %47 = getelementptr inbounds %struct.MinStack, ptr %46, i32 0, i32 1
  store ptr %45, ptr %47, align 8, !tbaa !16
  br label %48

48:                                               ; preds = %35, %27
  store i32 0, ptr %6, align 4
  br label %49

49:                                               ; preds = %48, %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  %50 = load i32, ptr %6, align 4
  switch i32 %50, label %52 [
    i32 0, label %51
    i32 1, label %51
  ]

51:                                               ; preds = %49, %49
  ret void

52:                                               ; preds = %49
  unreachable
}

; 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

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 }
attributes #4 = { 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, !10, i64 0}
!12 = !{!"node", !10, i64 0, !6, i64 8}
!13 = !{!14, !6, i64 0}
!14 = !{!"", !6, i64 0, !6, i64 8}
!15 = !{!12, !6, i64 8}
!16 = !{!14, !6, i64 8}


; 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: mustprogress nofree nounwind willreturn uwtable
define dso_local void @minStackPush(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %14, label %3

3:                                                ; preds = %2
  %4 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #2
  store i32 %1, ptr %4, align 8, !tbaa !5
  %5 = load ptr, ptr %0, align 8, !tbaa !11
  %6 = getelementptr inbounds i8, ptr %4, i64 8
  store ptr %5, ptr %6, align 8, !tbaa !13
  store ptr %4, ptr %0, align 8, !tbaa !11
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  %8 = load ptr, ptr %7, align 8, !tbaa !14
  %.not16 = icmp eq ptr %8, null
  br i1 %.not16, label %11, label %9

9:                                                ; preds = %3
  %10 = load i32, ptr %8, align 8, !tbaa !5
  %.not17 = icmp slt i32 %10, %1
  br i1 %.not17, label %14, label %11

11:                                               ; preds = %9, %3
  %12 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #2
  store i32 %1, ptr %12, align 8, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %12, i64 8
  store ptr %8, ptr %13, align 8, !tbaa !13
  store ptr %12, ptr %7, align 8, !tbaa !14
  br label %14

14:                                               ; preds = %9, %11, %2
  ret void
}

; 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

attributes #0 = { mustprogress nofree nounwind willreturn 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 = { 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, !7, i64 0}
!6 = !{!"node", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"", !10, i64 0, !10, i64 8}
!13 = !{!6, !10, i64 8}
!14 = !{!12, !10, i64 8}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass