; LLVM IR from codemistic/Data-Structures-and-Algorithms :: CPP/LINKED LIST/CIRCULAR LINKED LIST/test4.ll (Z5func1i)

; 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"

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z5func2i(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: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z4ct_di(i32 noundef) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z5func1i(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 2147483647, ptr %4, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %31, %1
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %12, label %32

12:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = add nsw i32 %13, 1
  %15 = call noundef i32 @_Z5func2i(i32 noundef %14)
  store i32 %15, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = add nsw i32 %16, 1
  %18 = call noundef i32 @_Z4ct_di(i32 noundef %17)
  store i32 %18, ptr %6, align 4, !tbaa !5
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = icmp eq i32 %19, %20
  br i1 %21, label %22, label %25

22:                                               ; preds = %12
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = add nsw i32 %23, 1
  store i32 %24, ptr %2, align 4
  store i32 1, ptr %7, align 4
  br label %29

25:                                               ; preds = %12
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %3, align 4, !tbaa !5
  br label %28

28:                                               ; preds = %25
  store i32 0, ptr %7, align 4
  br label %29

29:                                               ; preds = %28, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  %30 = load i32, ptr %7, align 4
  switch i32 %30, label %33 [
    i32 0, label %31
  ]

31:                                               ; preds = %29
  br label %8, !llvm.loop !9

32:                                               ; preds = %8
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %7, align 4
  br label %33

33:                                               ; preds = %32, %29
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %34 = load i32, ptr %2, align 4
  ret i32 %34
}

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z5func2i(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z4ct_di(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z5func1i(i32 noundef %0) local_unnamed_addr #0 {
  br label %2

2:                                                ; preds = %3, %1
  %.011 = phi i32 [ %0, %1 ], [ %4, %3 ]
  %.not = icmp eq i32 %.011, 2147483647
  br i1 %.not, label %7, label %3

3:                                                ; preds = %2
  %4 = add nsw i32 %.011, 1
  %5 = tail call noundef i32 @_Z5func2i(i32 noundef %4)
  %6 = tail call noundef i32 @_Z4ct_di(i32 noundef %4)
  %.not13 = icmp eq i32 %5, %6
  br i1 %.not13, label %7, label %2, !llvm.loop !5

7:                                                ; preds = %2, %3
  %.2 = phi i32 [ %4, %3 ], [ -1, %2 ]
  ret i32 %.2
}

attributes #0 = { 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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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