; LLVM IR from ahampriyanshu/algo-ds-101 :: Algorithms/Array (Arr4 right shift)

; 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"

@.str.4 = external hidden unnamed_addr constant [28 x i8], align 1

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

declare i32 @printf(ptr noundef, ...) #1

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

11:                                               ; preds = %27, %2
  %12 = load i32, ptr %5, align 4, !tbaa !9
  %13 = icmp sgt i32 %12, 0
  br i1 %13, label %14, label %30

14:                                               ; preds = %11
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = load ptr, ptr %7, align 8, !tbaa !5
  %17 = load ptr, ptr %7, align 8, !tbaa !5
  %18 = getelementptr inbounds i32, ptr %17, i64 -1
  %19 = call i32 (ptr, ...) @printf(ptr noundef @.str.4, i32 noundef %15, ptr noundef %16, ptr noundef %18)
  %20 = load ptr, ptr %7, align 8, !tbaa !5
  %21 = getelementptr inbounds i32, ptr %20, i64 -1
  %22 = load i32, ptr %21, align 4, !tbaa !9
  store i32 %22, ptr %6, align 4, !tbaa !9
  %23 = load i32, ptr %6, align 4, !tbaa !9
  %24 = load ptr, ptr %7, align 8, !tbaa !5
  store i32 %23, ptr %24, align 4, !tbaa !9
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = getelementptr inbounds i32, ptr %25, i32 -1
  store ptr %26, ptr %7, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %14
  %28 = load i32, ptr %5, align 4, !tbaa !9
  %29 = add nsw i32 %28, -1
  store i32 %29, ptr %5, align 4, !tbaa !9
  br label %11, !llvm.loop !11

30:                                               ; preds = %11
  %31 = load ptr, ptr %7, align 8, !tbaa !5
  store i32 -1, ptr %31, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

@.str.4 = external hidden unnamed_addr constant [28 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: nofree nounwind uwtable
define dso_local void @DisplayArray(ptr noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = icmp sgt i32 %1, 1
  br i1 %3, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.013 = phi ptr [ %4, %.lr.ph ], [ %0, %2 ]
  %.011.in12 = phi i32 [ %.011, %.lr.ph ], [ %1, %2 ]
  %.011 = add nsw i32 %.011.in12, -1
  %4 = getelementptr inbounds i8, ptr %.013, i64 -4
  %5 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4, i32 noundef %.011, ptr noundef %.013, ptr noundef nonnull %4)
  %6 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %6, ptr %.013, align 4, !tbaa !5
  %7 = icmp ugt i32 %.011.in12, 2
  br i1 %7, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.0.lcssa = phi ptr [ %0, %2 ], [ %4, %.lr.ph ]
  store i32 -1, ptr %.0.lcssa, align 4, !tbaa !5
  ret void
}

attributes #0 = { nofree 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 #1 = { nofree 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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