; LLVM IR from codemistic/Data-Structures-and-Algorithms :: CPP/LINKED LIST/CIRCULAR LINKED LIST/test4.ll (Z5func2i)

; 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
define dso_local noundef i32 @_Z5func2i(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca [10 x i32], align 16
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 40, ptr %3) #3
  call void @llvm.memset.p0.i64(ptr align 16 %3, i8 0, i64 40, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %10, %1
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = icmp ne i32 %8, 0
  br i1 %9, label %10, label %18

10:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = srem i32 %11, 10
  store i32 %12, ptr %5, align 4, !tbaa !5
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [10 x i32], ptr %3, i64 0, i64 %14
  store i32 1, ptr %15, align 4, !tbaa !5
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = sdiv i32 %16, 10
  store i32 %17, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %7, !llvm.loop !9

18:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %19

19:                                               ; preds = %33, %18
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = icmp slt i32 %20, 10
  br i1 %21, label %23, label %22

22:                                               ; preds = %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %36

23:                                               ; preds = %19
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [10 x i32], ptr %3, i64 0, i64 %25
  %27 = load i32, ptr %26, align 4, !tbaa !5
  %28 = icmp ne i32 %27, 0
  br i1 %28, label %29, label %32

29:                                               ; preds = %23
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %4, align 4, !tbaa !5
  br label %32

32:                                               ; preds = %29, %23
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %6, align 4, !tbaa !5
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %6, align 4, !tbaa !5
  br label %19, !llvm.loop !11

36:                                               ; preds = %22
  %37 = load i32, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 40, ptr %3) #3
  ret i32 %37
}

; 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 nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

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

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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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"}
!11 = distinct !{!11, !10}


; 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 norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i32 @_Z5func2i(i32 noundef %0) local_unnamed_addr #0 {
  %2 = alloca [10 x i32], align 16
  call void @llvm.lifetime.start.p0(i64 40, ptr nonnull %2) #4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(40) %2, i8 0, i64 40, i1 false)
  %.not12 = icmp eq i32 %0, 0
  br i1 %.not12, label %.preheader, label %.lr.ph

.preheader.loopexit:                              ; preds = %.lr.ph
  %.phi.trans.insert30 = getelementptr inbounds i8, ptr %2, i64 32
  %.pre31 = load i32, ptr %.phi.trans.insert30, align 16, !tbaa !5
  %.phi.trans.insert32 = getelementptr inbounds i8, ptr %2, i64 36
  %.pre33 = load i32, ptr %.phi.trans.insert32, align 4, !tbaa !5
  %3 = load <8 x i32>, ptr %2, align 16, !tbaa !5
  %4 = icmp ne <8 x i32> %3, zeroinitializer
  %5 = icmp ne i32 %.pre31, 0
  %6 = zext i1 %5 to i32
  %7 = icmp ne i32 %.pre33, 0
  %8 = zext i1 %7 to i32
  %9 = bitcast <8 x i1> %4 to i8
  %10 = tail call range(i8 0, 9) i8 @llvm.ctpop.i8(i8 %9)
  %11 = zext nneg i8 %10 to i32
  %op.rdx = add nuw nsw i32 %11, %6
  %op.rdx34 = add nuw nsw i32 %op.rdx, %8
  br label %.preheader

.preheader:                                       ; preds = %.preheader.loopexit, %1
  %spec.select.9 = phi i32 [ %op.rdx34, %.preheader.loopexit ], [ 0, %1 ]
  call void @llvm.lifetime.end.p0(i64 40, ptr nonnull %2) #4
  ret i32 %spec.select.9

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.0913 = phi i32 [ %15, %.lr.ph ], [ %0, %1 ]
  %12 = srem i32 %.0913, 10
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [10 x i32], ptr %2, i64 0, i64 %13
  store i32 1, ptr %14, align 4, !tbaa !5
  %15 = sdiv i32 %.0913, 10
  %.0913.off = add i32 %.0913, 9
  %.not = icmp ult i32 %.0913.off, 19
  br i1 %.not, label %.preheader.loopexit, label %.lr.ph, !llvm.loop !9
}

; 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 nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i8 @llvm.ctpop.i8(i8) #3

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: BDCEPass,GVNPass,GlobalDCEPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SLPVectorizerPass,SROAPass,SimplifyCFGPass,TailCallElimPass