; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 30. CPP Programs/01_Reverse_Array.ll (Z7reversePiii)

; 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 uwtable
define dso_local void @_Z7reversePiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %12

12:                                               ; preds = %43, %3
  %13 = load i32, ptr %7, align 4, !tbaa !9
  %14 = load i32, ptr %5, align 4, !tbaa !9
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %47

17:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %18 = load i32, ptr %7, align 4, !tbaa !9
  store i32 %18, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = add nsw i32 %19, %20
  %22 = sub nsw i32 %21, 1
  store i32 %22, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = sub nsw i32 %23, 1
  store i32 %24, ptr %11, align 4, !tbaa !9
  %25 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %10, ptr noundef nonnull align 4 dereferenceable(4) %11)
  %26 = load i32, ptr %25, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  store i32 %26, ptr %9, align 4, !tbaa !9
  br label %27

27:                                               ; preds = %31, %17
  %28 = load i32, ptr %8, align 4, !tbaa !9
  %29 = load i32, ptr %9, align 4, !tbaa !9
  %30 = icmp slt i32 %28, %29
  br i1 %30, label %31, label %42

31:                                               ; preds = %27
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = load i32, ptr %8, align 4, !tbaa !9
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %8, align 4, !tbaa !9
  %35 = sext i32 %33 to i64
  %36 = getelementptr inbounds i32, ptr %32, i64 %35
  %37 = load ptr, ptr %4, align 8, !tbaa !5
  %38 = load i32, ptr %9, align 4, !tbaa !9
  %39 = add nsw i32 %38, -1
  store i32 %39, ptr %9, align 4, !tbaa !9
  %40 = sext i32 %38 to i64
  %41 = getelementptr inbounds i32, ptr %37, i64 %40
  call void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4) %36, ptr noundef nonnull align 4 dereferenceable(4) %41) #3
  br label %27, !llvm.loop !11

42:                                               ; preds = %27
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %6, align 4, !tbaa !9
  %45 = load i32, ptr %7, align 4, !tbaa !9
  %46 = add nsw i32 %45, %44
  store i32 %46, ptr %7, align 4, !tbaa !9
  br label %12, !llvm.loop !13

47:                                               ; preds = %16
  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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

attributes #0 = { mustprogress 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 = { inlinehint 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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 nounwind uwtable
define dso_local void @_Z7reversePiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = icmp sgt i32 %1, 0
  br i1 %6, label %.lr.ph19, label %._crit_edge

.lr.ph19:                                         ; preds = %3
  %7 = add nsw i32 %1, -1
  %8 = sext i32 %2 to i64
  br label %10

.loopexit:                                        ; preds = %.lr.ph, %10
  %9 = icmp slt i32 %indvars, %1
  br i1 %9, label %10, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.loopexit, %3
  ret void

10:                                               ; preds = %.lr.ph19, %.loopexit
  %indvars.iv20 = phi i64 [ 0, %.lr.ph19 ], [ %indvars.iv.next21, %.loopexit ]
  %indvars27 = trunc i64 %indvars.iv20 to i32
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  %indvars.iv.next21 = add i64 %indvars.iv20, %8
  %indvars = trunc i64 %indvars.iv.next21 to i32
  %11 = add nsw i32 %indvars, -1
  store i32 %11, ptr %4, align 4, !tbaa !7
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #3
  store i32 %7, ptr %5, align 4, !tbaa !7
  %12 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %13 = load i32, ptr %12, align 4, !tbaa !7
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  %14 = icmp sgt i32 %13, %indvars27
  br i1 %14, label %.lr.ph.preheader, label %.loopexit

.lr.ph.preheader:                                 ; preds = %10
  %15 = sext i32 %13 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv22 = phi i64 [ %indvars.iv20, %.lr.ph.preheader ], [ %indvars.iv.next23, %.lr.ph ]
  %indvars.iv = phi i64 [ %15, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %indvars.iv.next23 = add nsw i64 %indvars.iv22, 1
  %16 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv22
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %17 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  call void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4) %16, ptr noundef nonnull align 4 dereferenceable(4) %17) #3
  %18 = icmp slt i64 %indvars.iv.next23, %indvars.iv.next
  br i1 %18, label %.lr.ph, label %.loopexit, !llvm.loop !11
}

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #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: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 #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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = distinct !{!11, !6}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass