; LLVM IR from AlgoGenesis/C :: Miscellaneous Algorithms/Vortex Cache Replacement Algorithm (VCRA)

; 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.CacheEntry = type { i32, i32, i64 }

@cache = external dso_local global [5 x %struct.CacheEntry], align 16

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @findInCache(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %32, %1
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = icmp slt i32 %7, 5
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  store i32 2, ptr %5, align 4
  br label %35

10:                                               ; preds = %6
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [5 x %struct.CacheEntry], ptr @cache, i64 0, i64 %12
  %14 = getelementptr inbounds %struct.CacheEntry, ptr %13, i32 0, i32 0
  %15 = load i32, ptr %14, align 16, !tbaa !9
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = icmp eq i32 %15, %16
  br i1 %17, label %18, label %31

18:                                               ; preds = %10
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [5 x %struct.CacheEntry], ptr @cache, i64 0, i64 %20
  %22 = getelementptr inbounds %struct.CacheEntry, ptr %21, i32 0, i32 1
  %23 = load i32, ptr %22, align 4, !tbaa !12
  %24 = add nsw i32 %23, 1
  store i32 %24, ptr %22, align 4, !tbaa !12
  %25 = call i64 @time(ptr noundef null) #3
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [5 x %struct.CacheEntry], ptr @cache, i64 0, i64 %27
  %29 = getelementptr inbounds %struct.CacheEntry, ptr %28, i32 0, i32 2
  store i64 %25, ptr %29, align 8, !tbaa !13
  %30 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %30, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %35

31:                                               ; preds = %10
  br label %32

32:                                               ; preds = %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
  br label %6, !llvm.loop !14

35:                                               ; preds = %18, %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  %36 = load i32, ptr %5, align 4
  switch i32 %36, label %40 [
    i32 2, label %37
    i32 1, label %38
  ]

37:                                               ; preds = %35
  store i32 -1, ptr %2, align 4
  br label %38

38:                                               ; preds = %37, %35
  %39 = load i32, ptr %2, align 4
  ret i32 %39

40:                                               ; preds = %35
  unreachable
}

; Function Attrs: nounwind
declare i64 @time(ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { nounwind "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 }

!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 = !{!10, !6, i64 0}
!10 = !{!"", !6, i64 0, !6, i64 4, !11, i64 8}
!11 = !{!"long", !7, i64 0}
!12 = !{!10, !6, i64 4}
!13 = !{!10, !11, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"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"

%struct.CacheEntry = type { i32, i32, i64 }

@cache = external dso_local local_unnamed_addr global [5 x %struct.CacheEntry], align 16

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @findInCache(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @cache, align 16, !tbaa !5
  %3 = icmp eq i32 %2, %0
  br i1 %3, label %4, label %10

4:                                                ; preds = %19, %16, %13, %10, %1
  %.0912.lcssa.wide = phi i32 [ 0, %1 ], [ 1, %10 ], [ 2, %13 ], [ 3, %16 ], [ 4, %19 ]
  %.lcssa = phi ptr [ @cache, %1 ], [ getelementptr inbounds (i8, ptr @cache, i64 16), %10 ], [ getelementptr inbounds (i8, ptr @cache, i64 32), %13 ], [ getelementptr inbounds (i8, ptr @cache, i64 48), %16 ], [ getelementptr inbounds (i8, ptr @cache, i64 64), %19 ]
  %5 = getelementptr inbounds i8, ptr %.lcssa, i64 4
  %6 = load i32, ptr %5, align 4, !tbaa !11
  %7 = add nsw i32 %6, 1
  store i32 %7, ptr %5, align 4, !tbaa !11
  %8 = tail call i64 @time(ptr noundef null) #2
  %9 = getelementptr inbounds i8, ptr %.lcssa, i64 8
  store i64 %8, ptr %9, align 8, !tbaa !12
  br label %.loopexit

10:                                               ; preds = %1
  %11 = load i32, ptr getelementptr inbounds (i8, ptr @cache, i64 16), align 16, !tbaa !5
  %12 = icmp eq i32 %11, %0
  br i1 %12, label %4, label %13

13:                                               ; preds = %10
  %14 = load i32, ptr getelementptr inbounds (i8, ptr @cache, i64 32), align 16, !tbaa !5
  %15 = icmp eq i32 %14, %0
  br i1 %15, label %4, label %16

16:                                               ; preds = %13
  %17 = load i32, ptr getelementptr inbounds (i8, ptr @cache, i64 48), align 16, !tbaa !5
  %18 = icmp eq i32 %17, %0
  br i1 %18, label %4, label %19

19:                                               ; preds = %16
  %20 = load i32, ptr getelementptr inbounds (i8, ptr @cache, i64 64), align 16, !tbaa !5
  %21 = icmp eq i32 %20, %0
  br i1 %21, label %4, label %.loopexit

.loopexit:                                        ; preds = %19, %4
  %spec.select = phi i32 [ %.0912.lcssa.wide, %4 ], [ -1, %19 ]
  ret i32 %spec.select
}

; Function Attrs: nounwind
declare i64 @time(ptr noundef) local_unnamed_addr #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 = { nounwind "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 }

!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 = !{!"", !7, i64 0, !7, i64 4, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = !{!6, !10, i64 8}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass