; LLVM IR from lolosssss/leetcode :: c (343_integer_break)

; 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: nounwind uwtable
define dso_local i32 @integerBreak(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
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 1, ptr %5, align 4, !tbaa !5
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = icmp eq i32 %7, 2
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store i32 1, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %41

10:                                               ; preds = %1
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = icmp eq i32 %11, 3
  br i1 %12, label %13, label %14

13:                                               ; preds = %10
  store i32 2, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %41

14:                                               ; preds = %10
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = srem i32 %15, 3
  switch i32 %16, label %28 [
    i32 1, label %17
    i32 2, label %23
  ]

17:                                               ; preds = %14
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = sdiv i32 %18, 3
  %20 = sub nsw i32 %19, 1
  store i32 %20, ptr %4, align 4, !tbaa !5
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = mul nsw i32 %21, 4
  store i32 %22, ptr %5, align 4, !tbaa !5
  br label %31

23:                                               ; preds = %14
  %24 = load i32, ptr %3, align 4, !tbaa !5
  %25 = sdiv i32 %24, 3
  store i32 %25, ptr %4, align 4, !tbaa !5
  %26 = load i32, ptr %5, align 4, !tbaa !5
  %27 = mul nsw i32 %26, 2
  store i32 %27, ptr %5, align 4, !tbaa !5
  br label %31

28:                                               ; preds = %14
  %29 = load i32, ptr %3, align 4, !tbaa !5
  %30 = sdiv i32 %29, 3
  store i32 %30, ptr %4, align 4, !tbaa !5
  br label %31

31:                                               ; preds = %28, %23, %17
  br label %32

32:                                               ; preds = %36, %31
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = add nsw i32 %33, -1
  store i32 %34, ptr %4, align 4, !tbaa !5
  %35 = icmp ne i32 %33, 0
  br i1 %35, label %36, label %39

36:                                               ; preds = %32
  %37 = load i32, ptr %5, align 4, !tbaa !5
  %38 = mul nsw i32 %37, 3
  store i32 %38, ptr %5, align 4, !tbaa !5
  br label %32, !llvm.loop !9

39:                                               ; preds = %32
  %40 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %40, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %41

41:                                               ; preds = %39, %13, %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %42 = load i32, ptr %2, align 4
  ret i32 %42
}

; 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

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 }

!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/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: nofree norecurse nosync nounwind memory(none) uwtable
define dso_local i32 @integerBreak(i32 noundef %0) local_unnamed_addr #0 {
  switch i32 %0, label %3 [
    i32 2, label %.loopexit
    i32 3, label %2
  ]

2:                                                ; preds = %1
  br label %.loopexit

3:                                                ; preds = %1
  %4 = srem i32 %0, 3
  %5 = sdiv i32 %0, 3
  switch i32 %4, label %8 [
    i32 1, label %6
    i32 2, label %9
  ]

6:                                                ; preds = %3
  %7 = add nsw i32 %5, -1
  br label %9

8:                                                ; preds = %3
  br label %9

9:                                                ; preds = %3, %8, %6
  %.012 = phi i32 [ %5, %8 ], [ %7, %6 ], [ %5, %3 ]
  %.0 = phi i32 [ 1, %8 ], [ 4, %6 ], [ %4, %3 ]
  %.not16 = icmp eq i32 %.012, 0
  br i1 %.not16, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %9
  %min.iters.check = icmp ult i32 %.012, 8
  br i1 %min.iters.check, label %.lr.ph.preheader20, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i32 %.012, -8
  %ind.end = and i32 %.012, 7
  %10 = insertelement <4 x i32> <i32 poison, i32 1, i32 1, i32 1>, i32 %.0, i64 0
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i32 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ %10, %vector.ph ], [ %11, %vector.body ]
  %vec.phi19 = phi <4 x i32> [ <i32 1, i32 1, i32 1, i32 1>, %vector.ph ], [ %12, %vector.body ]
  %11 = mul <4 x i32> %vec.phi, <i32 3, i32 3, i32 3, i32 3>
  %12 = mul <4 x i32> %vec.phi19, <i32 3, i32 3, i32 3, i32 3>
  %index.next = add nuw i32 %index, 8
  %13 = icmp eq i32 %index.next, %n.vec
  br i1 %13, label %middle.block, label %vector.body, !llvm.loop !5

middle.block:                                     ; preds = %vector.body
  %bin.rdx = mul <4 x i32> %12, %11
  %14 = tail call i32 @llvm.vector.reduce.mul.v4i32(<4 x i32> %bin.rdx)
  %cmp.n = icmp eq i32 %.012, %n.vec
  br i1 %cmp.n, label %.loopexit, label %.lr.ph.preheader20

.lr.ph.preheader20:                               ; preds = %middle.block, %.lr.ph.preheader
  %.118.ph = phi i32 [ %.0, %.lr.ph.preheader ], [ %14, %middle.block ]
  %.11317.ph = phi i32 [ %.012, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader20, %.lr.ph
  %.118 = phi i32 [ %16, %.lr.ph ], [ %.118.ph, %.lr.ph.preheader20 ]
  %.11317 = phi i32 [ %15, %.lr.ph ], [ %.11317.ph, %.lr.ph.preheader20 ]
  %15 = add nsw i32 %.11317, -1
  %16 = mul nuw nsw i32 %.118, 3
  %.not = icmp eq i32 %15, 0
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !9

.loopexit:                                        ; preds = %.lr.ph, %middle.block, %9, %1, %2
  %.014 = phi i32 [ 2, %2 ], [ 1, %1 ], [ %.0, %9 ], [ %14, %middle.block ], [ %16, %.lr.ph ]
  ret i32 %.014
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.mul.v4i32(<4 x i32>) #1

attributes #0 = { nofree norecurse nosync nounwind 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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, !7, !8}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!"llvm.loop.isvectorized", i32 1}
!8 = !{!"llvm.loop.unroll.runtime.disable"}
!9 = distinct !{!9, !6, !8, !7}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass