; LLVM IR from KishanBGajera/2024-366-Days-Of-DSA :: Data Structures/Linear/Stack/Applications of Stack/Tower of Hanoi/C (main)

; 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
declare dso_local void @printTowers(ptr noundef, ptr noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local void @moveToTower(ptr noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @towerOfHanoi(i32 noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3) #0 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  store i32 %0, ptr %5, align 4, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !9
  %9 = load i32, ptr %5, align 4, !tbaa !5
  %10 = icmp sgt i32 %9, 0
  br i1 %10, label %11, label %27

11:                                               ; preds = %4
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = sub nsw i32 %12, 1
  %14 = load ptr, ptr %6, align 8, !tbaa !9
  %15 = load ptr, ptr %8, align 8, !tbaa !9
  %16 = load ptr, ptr %7, align 8, !tbaa !9
  call void @towerOfHanoi(i32 noundef %13, ptr noundef %14, ptr noundef %15, ptr noundef %16)
  %17 = load ptr, ptr %6, align 8, !tbaa !9
  %18 = load ptr, ptr %8, align 8, !tbaa !9
  call void @moveToTower(ptr noundef %17, ptr noundef %18)
  %19 = load ptr, ptr %6, align 8, !tbaa !9
  %20 = load ptr, ptr %7, align 8, !tbaa !9
  %21 = load ptr, ptr %8, align 8, !tbaa !9
  call void @printTowers(ptr noundef %19, ptr noundef %20, ptr noundef %21)
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = sub nsw i32 %22, 1
  %24 = load ptr, ptr %7, align 8, !tbaa !9
  %25 = load ptr, ptr %6, align 8, !tbaa !9
  %26 = load ptr, ptr %8, align 8, !tbaa !9
  call void @towerOfHanoi(i32 noundef %23, ptr noundef %24, ptr noundef %25, ptr noundef %26)
  br label %27

27:                                               ; preds = %11, %4
  ret void
}

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" }

!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, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}


; 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: nounwind uwtable
declare dso_local void @printTowers(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @moveToTower(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @towerOfHanoi(i32 noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3) local_unnamed_addr #0 {
  %5 = icmp sgt i32 %0, 0
  br i1 %5, label %tailrecurse, label %tailrecurse._crit_edge

tailrecurse:                                      ; preds = %4, %tailrecurse
  %.tr1418 = phi ptr [ %.tr1317, %tailrecurse ], [ %2, %4 ]
  %.tr1317 = phi ptr [ %.tr1418, %tailrecurse ], [ %1, %4 ]
  %.tr16 = phi i32 [ %6, %tailrecurse ], [ %0, %4 ]
  %6 = add nsw i32 %.tr16, -1
  tail call void @towerOfHanoi(i32 noundef %6, ptr noundef %.tr1317, ptr noundef %3, ptr noundef %.tr1418)
  tail call void @moveToTower(ptr noundef %.tr1317, ptr noundef %3)
  tail call void @printTowers(ptr noundef %.tr1317, ptr noundef %.tr1418, ptr noundef %3)
  %7 = icmp ugt i32 %.tr16, 1
  br i1 %7, label %tailrecurse, label %tailrecurse._crit_edge

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %4
  ret void
}

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" }

!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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass