; LLVM IR from ahampriyanshu/algo-ds-101 :: Algorithms/Hashing/Cuckoo_Hashing/Cuckoo_Hashing.ll (Z9fillTablev)

; 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"

@cuckooTable = external dso_local global [2 x [100 x i32]], align 16
@_ZL9tableSize = external hidden global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z9fillTablev() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  store i32 0, ptr %1, align 4, !tbaa !5
  br label %4

4:                                                ; preds = %25, %0
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = load i32, ptr @_ZL9tableSize, align 4, !tbaa !5
  %7 = icmp slt i32 %5, %6
  br i1 %7, label %9, label %8

8:                                                ; preds = %4
  store i32 2, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #2
  br label %28

9:                                                ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %21, %9
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = icmp slt i32 %11, 2
  br i1 %12, label %14, label %13

13:                                               ; preds = %10
  store i32 5, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  br label %24

14:                                               ; preds = %10
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [2 x [100 x i32]], ptr @cuckooTable, i64 0, i64 %16
  %18 = load i32, ptr %1, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [100 x i32], ptr %17, i64 0, i64 %19
  store i32 -2147483648, ptr %20, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %14
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %3, align 4, !tbaa !5
  br label %10, !llvm.loop !9

24:                                               ; preds = %13
  br label %25

25:                                               ; preds = %24
  %26 = load i32, ptr %1, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %1, align 4, !tbaa !5
  br label %4, !llvm.loop !11

28:                                               ; preds = %8
  ret void
}

; 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 = { 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"}
!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"

@cuckooTable = external dso_local local_unnamed_addr global [2 x [100 x i32]], align 16
@_ZL9tableSize = external hidden local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z9fillTablev() local_unnamed_addr #0 {
  %1 = load i32, ptr @_ZL9tableSize, align 4, !tbaa !5
  %2 = icmp sgt i32 %1, 0
  br i1 %2, label %.preheader.preheader, label %._crit_edge

.preheader.preheader:                             ; preds = %0
  %wide.trip.count = zext nneg i32 %1 to i64
  %min.iters.check = icmp ult i32 %1, 4
  br i1 %min.iters.check, label %.preheader.preheader11, label %vector.ph

vector.ph:                                        ; preds = %.preheader.preheader
  %n.vec = and i64 %wide.trip.count, 2147483644
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %3 = getelementptr inbounds [2 x [100 x i32]], ptr @cuckooTable, i64 0, i64 0, i64 %index
  store <4 x i32> <i32 -2147483648, i32 -2147483648, i32 -2147483648, i32 -2147483648>, ptr %3, align 16, !tbaa !5
  %4 = getelementptr inbounds [2 x [100 x i32]], ptr @cuckooTable, i64 0, i64 1, i64 %index
  store <4 x i32> <i32 -2147483648, i32 -2147483648, i32 -2147483648, i32 -2147483648>, ptr %4, align 16, !tbaa !5
  %index.next = add nuw i64 %index, 4
  %5 = icmp eq i64 %index.next, %n.vec
  br i1 %5, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.preheader.preheader11

.preheader.preheader11:                           ; preds = %middle.block, %.preheader.preheader
  %indvars.iv.ph = phi i64 [ 0, %.preheader.preheader ], [ %n.vec, %middle.block ]
  br label %.preheader

.preheader:                                       ; preds = %.preheader.preheader11, %.preheader
  %indvars.iv = phi i64 [ %indvars.iv.next, %.preheader ], [ %indvars.iv.ph, %.preheader.preheader11 ]
  %6 = getelementptr inbounds [2 x [100 x i32]], ptr @cuckooTable, i64 0, i64 0, i64 %indvars.iv
  store i32 -2147483648, ptr %6, align 4, !tbaa !5
  %7 = getelementptr inbounds [2 x [100 x i32]], ptr @cuckooTable, i64 0, i64 1, i64 %indvars.iv
  store i32 -2147483648, ptr %7, align 4, !tbaa !5
  %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 %._crit_edge, label %.preheader, !llvm.loop !13

._crit_edge:                                      ; preds = %.preheader, %middle.block, %0
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: 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" }

!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, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass