; LLVM IR from div-bargali/Data-Structures-and-Algorithms :: C++/Algorithms/Sorting-Algorithms/SpiralMatrixSort.ll (Z13convert2Dto1DPA1000_iiiPi)

; 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: 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: mustprogress nounwind uwtable
define dso_local void @_Z13convert2Dto1DPA1000_iiiPi(ptr noundef %0, i32 noundef %1, i32 noundef %2, ptr noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store i32 0, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %43, %4
  %14 = load i32, ptr %10, align 4, !tbaa !9
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = icmp slt i32 %14, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %13
  store i32 2, ptr %11, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %46

18:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #2
  store i32 0, ptr %12, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %39, %18
  %20 = load i32, ptr %12, align 4, !tbaa !9
  %21 = load i32, ptr %7, align 4, !tbaa !9
  %22 = icmp slt i32 %20, %21
  br i1 %22, label %24, label %23

23:                                               ; preds = %19
  store i32 5, ptr %11, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #2
  br label %42

24:                                               ; preds = %19
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = load i32, ptr %10, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [1000 x i32], ptr %25, i64 %27
  %29 = load i32, ptr %12, align 4, !tbaa !9
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [1000 x i32], ptr %28, i64 0, i64 %30
  %32 = load i32, ptr %31, align 4, !tbaa !9
  %33 = load ptr, ptr %8, align 8, !tbaa !5
  %34 = load i32, ptr %9, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds i32, ptr %33, i64 %35
  store i32 %32, ptr %36, align 4, !tbaa !9
  %37 = load i32, ptr %9, align 4, !tbaa !9
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %9, align 4, !tbaa !9
  br label %39

39:                                               ; preds = %24
  %40 = load i32, ptr %12, align 4, !tbaa !9
  %41 = add nsw i32 %40, 1
  store i32 %41, ptr %12, align 4, !tbaa !9
  br label %19, !llvm.loop !11

42:                                               ; preds = %23
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %10, align 4, !tbaa !9
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %10, align 4, !tbaa !9
  br label %13, !llvm.loop !13

46:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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, !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 @_Z13convert2Dto1DPA1000_iiiPi(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2, ptr nocapture noundef writeonly %3) local_unnamed_addr #0 {
  %5 = icmp sgt i32 %1, 0
  %6 = icmp sgt i32 %2, 0
  %or.cond = and i1 %5, %6
  br i1 %or.cond, label %.preheader.us.preheader, label %._crit_edge17

.preheader.us.preheader:                          ; preds = %4
  %7 = ptrtoint ptr %3 to i64
  %8 = ptrtoint ptr %0 to i64
  %wide.trip.count28 = zext nneg i32 %1 to i64
  %wide.trip.count = zext nneg i32 %2 to i64
  %9 = sub i64 %7, %8
  %min.iters.check = icmp ult i32 %2, 8
  %n.vec = and i64 %wide.trip.count, 2147483640
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  %xtraiter = and i64 %wide.trip.count, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  %invariant.gep = getelementptr i8, ptr %3, i64 4
  %invariant.gep33 = getelementptr i8, ptr %3, i64 8
  %invariant.gep35 = getelementptr i8, ptr %3, i64 12
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %indvars.iv25 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next26, %._crit_edge.us ]
  %.01215.us = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next21.lcssa, %._crit_edge.us ]
  %sext = shl i64 %.01215.us, 32
  %10 = ashr exact i64 %sext, 32
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.memcheck

vector.memcheck:                                  ; preds = %.preheader.us
  %11 = mul nsw i64 %indvars.iv25, -4000
  %12 = add i64 %9, %11
  %13 = ashr exact i64 %sext, 30
  %14 = add i64 %12, %13
  %diff.check = icmp ult i64 %14, 32
  br i1 %diff.check, label %scalar.ph.preheader, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %ind.end = add nsw i64 %10, %n.vec
  %15 = getelementptr i32, ptr %3, i64 %10
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %16 = getelementptr inbounds [1000 x i32], ptr %0, i64 %indvars.iv25, i64 %index
  %17 = getelementptr inbounds i8, ptr %16, i64 16
  %wide.load = load <4 x i32>, ptr %16, align 4, !tbaa !5
  %wide.load31 = load <4 x i32>, ptr %17, align 4, !tbaa !5
  %18 = getelementptr i32, ptr %15, i64 %index
  %19 = getelementptr inbounds i8, ptr %18, i64 16
  store <4 x i32> %wide.load, ptr %18, align 4, !tbaa !5
  store <4 x i32> %wide.load31, ptr %19, align 4, !tbaa !5
  %index.next = add nuw i64 %index, 8
  %20 = icmp eq i64 %index.next, %n.vec
  br i1 %20, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  br i1 %cmp.n, label %._crit_edge.us, label %scalar.ph.preheader

scalar.ph.preheader:                              ; preds = %middle.block, %vector.memcheck, %.preheader.us
  %indvars.iv20.ph = phi i64 [ %10, %vector.memcheck ], [ %10, %.preheader.us ], [ %ind.end, %middle.block ]
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.preheader.us ], [ %n.vec, %middle.block ]
  br i1 %lcmp.mod.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol

scalar.ph.prol:                                   ; preds = %scalar.ph.preheader, %scalar.ph.prol
  %indvars.iv20.prol = phi i64 [ %indvars.iv.next21.prol, %scalar.ph.prol ], [ %indvars.iv20.ph, %scalar.ph.preheader ]
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %scalar.ph.prol ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %prol.iter = phi i64 [ %prol.iter.next, %scalar.ph.prol ], [ 0, %scalar.ph.preheader ]
  %21 = getelementptr inbounds [1000 x i32], ptr %0, i64 %indvars.iv25, i64 %indvars.iv.prol
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = getelementptr inbounds i32, ptr %3, i64 %indvars.iv20.prol
  store i32 %22, ptr %23, align 4, !tbaa !5
  %indvars.iv.next21.prol = add nsw i64 %indvars.iv20.prol, 1
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.prol, 1
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol, !llvm.loop !13

scalar.ph.prol.loopexit:                          ; preds = %scalar.ph.prol, %scalar.ph.preheader
  %indvars.iv.next21.lcssa32.unr = phi i64 [ poison, %scalar.ph.preheader ], [ %indvars.iv.next21.prol, %scalar.ph.prol ]
  %indvars.iv20.unr = phi i64 [ %indvars.iv20.ph, %scalar.ph.preheader ], [ %indvars.iv.next21.prol, %scalar.ph.prol ]
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %scalar.ph.preheader ], [ %indvars.iv.next.prol, %scalar.ph.prol ]
  %24 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %25 = icmp ugt i64 %24, -4
  br i1 %25, label %._crit_edge.us, label %scalar.ph

scalar.ph:                                        ; preds = %scalar.ph.prol.loopexit, %scalar.ph
  %indvars.iv20 = phi i64 [ %indvars.iv.next21.3, %scalar.ph ], [ %indvars.iv20.unr, %scalar.ph.prol.loopexit ]
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %scalar.ph ], [ %indvars.iv.unr, %scalar.ph.prol.loopexit ]
  %26 = getelementptr inbounds [1000 x i32], ptr %0, i64 %indvars.iv25, i64 %indvars.iv
  %27 = load i32, ptr %26, align 4, !tbaa !5
  %28 = getelementptr inbounds i32, ptr %3, i64 %indvars.iv20
  store i32 %27, ptr %28, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %29 = getelementptr inbounds [1000 x i32], ptr %0, i64 %indvars.iv25, i64 %indvars.iv.next
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %gep = getelementptr i32, ptr %invariant.gep, i64 %indvars.iv20
  store i32 %30, ptr %gep, align 4, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %31 = getelementptr inbounds [1000 x i32], ptr %0, i64 %indvars.iv25, i64 %indvars.iv.next.1
  %32 = load i32, ptr %31, align 4, !tbaa !5
  %gep34 = getelementptr i32, ptr %invariant.gep33, i64 %indvars.iv20
  store i32 %32, ptr %gep34, align 4, !tbaa !5
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %33 = getelementptr inbounds [1000 x i32], ptr %0, i64 %indvars.iv25, i64 %indvars.iv.next.2
  %34 = load i32, ptr %33, align 4, !tbaa !5
  %gep36 = getelementptr i32, ptr %invariant.gep35, i64 %indvars.iv20
  store i32 %34, ptr %gep36, align 4, !tbaa !5
  %indvars.iv.next21.3 = add nsw i64 %indvars.iv20, 4
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %wide.trip.count
  br i1 %exitcond.not.3, label %._crit_edge.us, label %scalar.ph, !llvm.loop !15

._crit_edge.us:                                   ; preds = %scalar.ph.prol.loopexit, %scalar.ph, %middle.block
  %indvars.iv.next21.lcssa = phi i64 [ %ind.end, %middle.block ], [ %indvars.iv.next21.lcssa32.unr, %scalar.ph.prol.loopexit ], [ %indvars.iv.next21.3, %scalar.ph ]
  %indvars.iv.next26 = add nuw nsw i64 %indvars.iv25, 1
  %exitcond29.not = icmp eq i64 %indvars.iv.next26, %wide.trip.count28
  br i1 %exitcond29.not, label %._crit_edge17, label %.preheader.us, !llvm.loop !16

._crit_edge17:                                    ; preds = %._crit_edge.us, %4
  ret void
}

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" }

!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, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.unroll.disable"}
!15 = distinct !{!15, !10, !11}
!16 = distinct !{!16, !10}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass