; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/348 Division 1/Problem A/A.ll (Z8rowshifti)

; 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: mustprogress nounwind uwtable
define dso_local void @_Z8rowshifti(i32 noundef %0) #0 {
  %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 = getelementptr inbounds [101 x i32], ptr %7, i64 0, i64 1
  %9 = load i32, ptr %8, align 4, !tbaa !5
  store i32 %9, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 1, ptr %4, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %30, %1
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = load i32, ptr @m, align 4, !tbaa !5
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %33

15:                                               ; preds = %10
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %17
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = add nsw i32 %19, 1
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [101 x i32], ptr %18, i64 0, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = load i32, ptr %2, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %25
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [101 x i32], ptr %26, i64 0, i64 %28
  store i32 %23, ptr %29, align 4, !tbaa !5
  br label %30

30:                                               ; preds = %15
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %4, align 4, !tbaa !5
  br label %10, !llvm.loop !9

33:                                               ; preds = %14
  %34 = load i32, ptr %3, align 4, !tbaa !5
  %35 = load i32, ptr %2, align 4, !tbaa !5
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %36
  %38 = load i32, ptr @m, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [101 x i32], ptr %37, i64 0, i64 %39
  store i32 %34, ptr %40, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 memory(argmem: readwrite) }
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 @_Z8rowshifti(i32 noundef %0) local_unnamed_addr #0 {
  %2 = sext i32 %0 to i64
  %3 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %2, i64 1
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = load i32, ptr @m, align 4, !tbaa !5
  %6 = icmp sgt i32 %5, 1
  br i1 %6, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %1
  %wide.trip.count = zext nneg i32 %5 to i64
  %7 = add nsw i64 %wide.trip.count, -1
  %min.iters.check = icmp ult i32 %5, 9
  br i1 %min.iters.check, label %.lr.ph.preheader14, label %vector.ph

.lr.ph.preheader14:                               ; preds = %middle.block, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 1, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  br label %.lr.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %7, -8
  %ind.end = or disjoint i64 %n.vec, 1
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %offset.idx = or disjoint i64 %index, 1
  %8 = or disjoint i64 %index, 2
  %9 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %2, i64 %8
  %10 = getelementptr inbounds i8, ptr %9, i64 16
  %wide.load = load <4 x i32>, ptr %9, align 4, !tbaa !5
  %wide.load13 = load <4 x i32>, ptr %10, align 4, !tbaa !5
  %11 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %2, i64 %offset.idx
  %12 = getelementptr inbounds i8, ptr %11, i64 16
  store <4 x i32> %wide.load, ptr %11, align 4, !tbaa !5
  store <4 x i32> %wide.load13, ptr %12, align 4, !tbaa !5
  %index.next = add nuw i64 %index, 8
  %13 = icmp eq i64 %index.next, %n.vec
  br i1 %13, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %7, %n.vec
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader14

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %1
  %14 = sext i32 %5 to i64
  %15 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %2, i64 %14
  store i32 %4, ptr %15, align 4, !tbaa !5
  ret void

.lr.ph:                                           ; preds = %.lr.ph.preheader14, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ %indvars.iv.ph, %.lr.ph.preheader14 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %16 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %2, i64 %indvars.iv.next
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = getelementptr inbounds [101 x [101 x i32]], ptr @ma, i64 0, i64 %2, i64 %indvars.iv
  store i32 %17, ptr %18, align 4, !tbaa !5
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !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: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass