; LLVM IR from next-step-for-interview-prep/Coding-Ninjas-DSA-course_code_and_notes_cpp :: Milestone-2=Intro_to_C++/questions and solutions/Lec-9=Searching_and_sorting/rotate_86a9fecc (Z6rotatePiii)

; 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 nounwind uwtable
define dso_local void @_Z6rotatePiii(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 ptr, align 8
  %8 = alloca i64, align 8
  %9 = alloca i32, align 4
  %10 = 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
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = zext i32 %11 to i64
  %13 = call ptr @llvm.stacksave.p0()
  store ptr %13, ptr %7, align 8
  %14 = alloca i32, i64 %12, align 16
  store i64 %12, ptr %8, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %54, %3
  %16 = load i32, ptr %9, align 4, !tbaa !9
  %17 = load i32, ptr %6, align 4, !tbaa !9
  %18 = icmp slt i32 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %57

20:                                               ; preds = %15
  %21 = load i32, ptr %9, align 4, !tbaa !9
  %22 = load i32, ptr %5, align 4, !tbaa !9
  %23 = icmp sge i32 %21, %22
  br i1 %23, label %24, label %35

24:                                               ; preds = %20
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = load i32, ptr %9, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i32, ptr %25, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !9
  %30 = load i32, ptr %9, align 4, !tbaa !9
  %31 = load i32, ptr %5, align 4, !tbaa !9
  %32 = sub nsw i32 %30, %31
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds i32, ptr %14, i64 %33
  store i32 %29, ptr %34, align 4, !tbaa !9
  br label %53

35:                                               ; preds = %20
  %36 = load i32, ptr %9, align 4, !tbaa !9
  %37 = load i32, ptr %5, align 4, !tbaa !9
  %38 = icmp slt i32 %36, %37
  br i1 %38, label %39, label %52

39:                                               ; preds = %35
  %40 = load ptr, ptr %4, align 8, !tbaa !5
  %41 = load i32, ptr %9, align 4, !tbaa !9
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds i32, ptr %40, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !9
  %45 = load i32, ptr %9, align 4, !tbaa !9
  %46 = load i32, ptr %6, align 4, !tbaa !9
  %47 = add nsw i32 %45, %46
  %48 = load i32, ptr %5, align 4, !tbaa !9
  %49 = sub nsw i32 %47, %48
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds i32, ptr %14, i64 %50
  store i32 %44, ptr %51, align 4, !tbaa !9
  br label %52

52:                                               ; preds = %39, %35
  br label %53

53:                                               ; preds = %52, %24
  br label %54

54:                                               ; preds = %53
  %55 = load i32, ptr %9, align 4, !tbaa !9
  %56 = add nsw i32 %55, 1
  store i32 %56, ptr %9, align 4, !tbaa !9
  br label %15, !llvm.loop !11

57:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %58

58:                                               ; preds = %72, %57
  %59 = load i32, ptr %10, align 4, !tbaa !9
  %60 = load i32, ptr %6, align 4, !tbaa !9
  %61 = icmp slt i32 %59, %60
  br i1 %61, label %63, label %62

62:                                               ; preds = %58
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  br label %75

63:                                               ; preds = %58
  %64 = load i32, ptr %10, align 4, !tbaa !9
  %65 = sext i32 %64 to i64
  %66 = getelementptr inbounds i32, ptr %14, i64 %65
  %67 = load i32, ptr %66, align 4, !tbaa !9
  %68 = load ptr, ptr %4, align 8, !tbaa !5
  %69 = load i32, ptr %10, align 4, !tbaa !9
  %70 = sext i32 %69 to i64
  %71 = getelementptr inbounds i32, ptr %68, i64 %70
  store i32 %67, ptr %71, align 4, !tbaa !9
  br label %72

72:                                               ; preds = %63
  %73 = load i32, ptr %10, align 4, !tbaa !9
  %74 = add nsw i32 %73, 1
  store i32 %74, ptr %10, align 4, !tbaa !9
  br label %58, !llvm.loop !13

75:                                               ; preds = %62
  %76 = load ptr, ptr %7, align 8
  call void @llvm.stackrestore.p0(ptr %76)
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #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 }
attributes #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @_Z6rotatePiii(ptr nocapture noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = zext i32 %2 to i64
  %5 = alloca i32, i64 %4, align 16
  %6 = icmp sgt i32 %2, 0
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3
  %7 = sub i32 %2, %1
  %8 = sext i32 %1 to i64
  %xtraiter = and i64 %4, 1
  %9 = icmp eq i32 %2, 1
  br i1 %9, label %.preheader.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i64 %4, 2147483646
  br label %18

.preheader.unr-lcssa:                             ; preds = %18, %.lr.ph
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next.1, %18 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.preheader, label %.preheader.epilog-lcssa

.preheader.epilog-lcssa:                          ; preds = %.preheader.unr-lcssa
  %.not.epil = icmp slt i64 %indvars.iv.unr, %8
  %10 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.unr
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = sub nsw i64 %indvars.iv.unr, %8
  %13 = trunc nuw nsw i64 %indvars.iv.unr to i32
  %14 = add i32 %7, %13
  %15 = sext i32 %14 to i64
  %.sink34.epil = select i1 %.not.epil, i64 %15, i64 %12
  %16 = getelementptr inbounds i32, ptr %5, i64 %.sink34.epil
  store i32 %11, ptr %16, align 4, !tbaa !5
  br label %.preheader

.preheader:                                       ; preds = %.preheader.unr-lcssa, %.preheader.epilog-lcssa
  br i1 %6, label %.lr.ph29.preheader, label %._crit_edge

.lr.ph29.preheader:                               ; preds = %.preheader
  %17 = shl nuw nsw i64 %4, 2
  call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 4 %0, ptr nonnull align 16 %5, i64 %17, i1 false), !tbaa !5
  br label %._crit_edge

18:                                               ; preds = %18, %.lr.ph.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.new ], [ %indvars.iv.next.1, %18 ]
  %niter = phi i64 [ 0, %.lr.ph.new ], [ %niter.next.1, %18 ]
  %.not = icmp slt i64 %indvars.iv, %8
  %19 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = sub nsw i64 %indvars.iv, %8
  %22 = trunc nuw nsw i64 %indvars.iv to i32
  %23 = add i32 %7, %22
  %24 = sext i32 %23 to i64
  %.sink34 = select i1 %.not, i64 %24, i64 %21
  %25 = getelementptr inbounds i32, ptr %5, i64 %.sink34
  store i32 %20, ptr %25, align 4, !tbaa !5
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %.not.1 = icmp slt i64 %indvars.iv.next, %8
  %26 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %27 = load i32, ptr %26, align 4, !tbaa !5
  %28 = sub nsw i64 %indvars.iv.next, %8
  %29 = trunc nuw nsw i64 %indvars.iv.next to i32
  %30 = add i32 %7, %29
  %31 = sext i32 %30 to i64
  %.sink34.1 = select i1 %.not.1, i64 %31, i64 %28
  %32 = getelementptr inbounds i32, ptr %5, i64 %.sink34.1
  store i32 %27, ptr %32, align 4, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %.preheader.unr-lcssa, label %18, !llvm.loop !9

._crit_edge:                                      ; preds = %3, %.lr.ph29.preheader, %.preheader
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) 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 nounwind willreturn memory(argmem: readwrite) }

!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"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass