; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/348 Division 1/Problem A/A.ll (Z6revrowi)

; 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"

@m = external dso_local global i32, align 4
@ma = external dso_local global [101 x [101 x i32]], align 16

; 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 @_Z6revrowi(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = sext i32 %5 to i64
  %7 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %6
  %8 = load i32, ptr @m, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [101 x i32], ptr %7, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  store i32 %11, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %12 = load i32, ptr @m, align 4, !tbaa !5
  store i32 %12, ptr %4, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %32, %1
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = icmp sgt i32 %14, 1
  br i1 %15, label %17, label %16

16:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %35

17:                                               ; preds = %13
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %19
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = sub nsw i32 %21, 1
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [101 x i32], ptr %20, i64 0, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = load i32, ptr %2, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %27
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [101 x i32], ptr %28, i64 0, i64 %30
  store i32 %25, ptr %31, align 4, !tbaa !5
  br label %32

32:                                               ; preds = %17
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = add nsw i32 %33, -1
  store i32 %34, ptr %4, align 4, !tbaa !5
  br label %13, !llvm.loop !9

35:                                               ; preds = %16
  %36 = load i32, ptr %3, align 4, !tbaa !5
  %37 = load i32, ptr %2, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %38
  %40 = getelementptr inbounds [101 x i32], ptr %39, i64 0, i64 1
  store i32 %36, ptr %40, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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"

@m = external dso_local local_unnamed_addr global i32, align 4
@ma = external dso_local local_unnamed_addr global [101 x [101 x i32]], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z6revrowi(i32 noundef %0) local_unnamed_addr #0 {
  %2 = sext i32 %0 to i64
  %3 = load i32, ptr @m, align 4, !tbaa !5
  %4 = sext i32 %3 to i64
  %5 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %2, i64 %4
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = icmp sgt i32 %3, 1
  br i1 %7, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %1
  %8 = zext nneg i32 %3 to i64
  %9 = add nsw i64 %8, -1
  %min.iters.check = icmp ult i32 %3, 9
  br i1 %min.iters.check, label %.lr.ph.preheader16, label %vector.ph

.lr.ph.preheader16:                               ; preds = %middle.block, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ %8, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  br label %.lr.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %9, -8
  %ind.end = sub nsw i64 %8, %n.vec
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %offset.idx = sub i64 %8, %index
  %10 = add nsw i64 %offset.idx, -1
  %11 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %2, i64 %10
  %12 = getelementptr inbounds i8, ptr %11, i64 -12
  %13 = getelementptr inbounds i8, ptr %11, i64 -28
  %wide.load = load <4 x i32>, ptr %12, align 4, !tbaa !5
  %wide.load12 = load <4 x i32>, ptr %13, align 4, !tbaa !5
  %14 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %2, i64 %offset.idx
  %15 = getelementptr inbounds i8, ptr %14, i64 -12
  %16 = getelementptr inbounds i8, ptr %14, i64 -28
  store <4 x i32> %wide.load, ptr %15, align 4, !tbaa !5
  store <4 x i32> %wide.load12, ptr %16, align 4, !tbaa !5
  %index.next = add nuw i64 %index, 8
  %17 = icmp eq i64 %index.next, %n.vec
  br i1 %17, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %9, %n.vec
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader16

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %1
  %18 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %2, i64 1
  store i32 %6, ptr %18, align 4, !tbaa !5
  ret void

.lr.ph:                                           ; preds = %.lr.ph.preheader16, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ %indvars.iv.ph, %.lr.ph.preheader16 ]
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %19 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %2, i64 %indvars.iv.next
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %2, i64 %indvars.iv
  store i32 %20, ptr %21, align 4, !tbaa !5
  %22 = icmp ugt i64 %indvars.iv, 2
  br i1 %22, label %.lr.ph, label %._crit_edge, !llvm.loop !13
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) 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, !10, !12, !11}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalDCEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass