; LLVM IR from tangjz/acm-icpc :: codechef/SEPT18/STCFOTT.ll (Z7mat_addiiPA481_iS0_S0_)

; 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 @_Z7mat_addiiPA481_iS0_S0_(i32 noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef %3, ptr noundef %4) #0 {
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !9
  store ptr %4, ptr %10, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  store i32 0, ptr %11, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %68, %5
  %15 = load i32, ptr %11, align 4, !tbaa !5
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  store i32 2, ptr %12, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  br label %71

19:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #2
  store i32 0, ptr %13, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %64, %19
  %21 = load i32, ptr %13, align 4, !tbaa !5
  %22 = load i32, ptr %7, align 4, !tbaa !5
  %23 = icmp slt i32 %21, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %20
  store i32 5, ptr %12, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #2
  br label %67

25:                                               ; preds = %20
  %26 = load ptr, ptr %8, align 8, !tbaa !9
  %27 = load i32, ptr %11, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [481 x i32], ptr %26, i64 %28
  %30 = load i32, ptr %13, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [481 x i32], ptr %29, i64 0, i64 %31
  %33 = load i32, ptr %32, align 4, !tbaa !5
  %34 = load ptr, ptr %9, align 8, !tbaa !9
  %35 = load i32, ptr %11, align 4, !tbaa !5
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds [481 x i32], ptr %34, i64 %36
  %38 = load i32, ptr %13, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [481 x i32], ptr %37, i64 0, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !5
  %42 = add nsw i32 %33, %41
  %43 = load ptr, ptr %10, align 8, !tbaa !9
  %44 = load i32, ptr %11, align 4, !tbaa !5
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds [481 x i32], ptr %43, i64 %45
  %47 = load i32, ptr %13, align 4, !tbaa !5
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds [481 x i32], ptr %46, i64 0, i64 %48
  store i32 %42, ptr %49, align 4, !tbaa !5
  %50 = icmp sge i32 %42, 998244353
  br i1 %50, label %51, label %62

51:                                               ; preds = %25
  %52 = load ptr, ptr %10, align 8, !tbaa !9
  %53 = load i32, ptr %11, align 4, !tbaa !5
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds [481 x i32], ptr %52, i64 %54
  %56 = load i32, ptr %13, align 4, !tbaa !5
  %57 = sext i32 %56 to i64
  %58 = getelementptr inbounds [481 x i32], ptr %55, i64 0, i64 %57
  %59 = load i32, ptr %58, align 4, !tbaa !5
  %60 = sub nsw i32 %59, 998244353
  store i32 %60, ptr %58, align 4, !tbaa !5
  %61 = icmp ne i32 %60, 0
  br label %62

62:                                               ; preds = %51, %25
  %63 = phi i1 [ false, %25 ], [ %61, %51 ]
  br label %64

64:                                               ; preds = %62
  %65 = load i32, ptr %13, align 4, !tbaa !5
  %66 = add nsw i32 %65, 1
  store i32 %66, ptr %13, align 4, !tbaa !5
  br label %20, !llvm.loop !11

67:                                               ; preds = %24
  br label %68

68:                                               ; preds = %67
  %69 = load i32, ptr %11, align 4, !tbaa !5
  %70 = add nsw i32 %69, 1
  store i32 %70, ptr %11, align 4, !tbaa !5
  br label %14, !llvm.loop !13

71:                                               ; preds = %18
  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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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 @_Z7mat_addiiPA481_iS0_S0_(i32 noundef %0, i32 noundef %1, ptr nocapture noundef readonly %2, ptr nocapture noundef readonly %3, ptr nocapture noundef writeonly %4) local_unnamed_addr #0 {
  %6 = icmp sgt i32 %0, 0
  %7 = icmp sgt i32 %1, 0
  %or.cond = and i1 %6, %7
  br i1 %or.cond, label %.preheader.us.preheader, label %._crit_edge21

.preheader.us.preheader:                          ; preds = %5
  %8 = ptrtoint ptr %4 to i64
  %9 = ptrtoint ptr %2 to i64
  %10 = ptrtoint ptr %3 to i64
  %wide.trip.count27 = zext nneg i32 %0 to i64
  %wide.trip.count = zext nneg i32 %1 to i64
  %11 = sub i64 %8, %9
  %12 = sub i64 %8, %10
  %min.iters.check = icmp ult i32 %1, 8
  %diff.check = icmp ult i64 %11, 32
  %diff.check29 = icmp ult i64 %12, 32
  %conflict.rdx = or i1 %diff.check, %diff.check29
  %n.vec = and i64 %wide.trip.count, 2147483640
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  %xtraiter = and i64 %wide.trip.count, 1
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  %13 = add nsw i64 %wide.trip.count, -1
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %indvars.iv24 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next25, %._crit_edge.us ]
  %brmerge = or i1 %min.iters.check, %conflict.rdx
  br i1 %brmerge, label %scalar.ph.preheader, label %vector.body

vector.body:                                      ; preds = %.preheader.us, %vector.body
  %index = phi i64 [ %index.next, %vector.body ], [ 0, %.preheader.us ]
  %14 = getelementptr inbounds [481 x i32], ptr %2, i64 %indvars.iv24, i64 %index
  %15 = getelementptr inbounds i8, ptr %14, i64 16
  %wide.load = load <4 x i32>, ptr %14, align 4, !tbaa !5
  %wide.load30 = load <4 x i32>, ptr %15, align 4, !tbaa !5
  %16 = getelementptr inbounds [481 x i32], ptr %3, i64 %indvars.iv24, i64 %index
  %17 = getelementptr inbounds i8, ptr %16, i64 16
  %wide.load31 = load <4 x i32>, ptr %16, align 4, !tbaa !5
  %wide.load32 = load <4 x i32>, ptr %17, align 4, !tbaa !5
  %18 = add nsw <4 x i32> %wide.load31, %wide.load
  %19 = add nsw <4 x i32> %wide.load32, %wide.load30
  %20 = getelementptr inbounds [481 x i32], ptr %4, i64 %indvars.iv24, i64 %index
  %21 = icmp sgt <4 x i32> %18, <i32 998244352, i32 998244352, i32 998244352, i32 998244352>
  %22 = icmp sgt <4 x i32> %19, <i32 998244352, i32 998244352, i32 998244352, i32 998244352>
  %23 = add nsw <4 x i32> %18, <i32 -998244353, i32 -998244353, i32 -998244353, i32 -998244353>
  %24 = add nsw <4 x i32> %19, <i32 -998244353, i32 -998244353, i32 -998244353, i32 -998244353>
  %25 = select <4 x i1> %21, <4 x i32> %23, <4 x i32> %18
  %26 = select <4 x i1> %22, <4 x i32> %24, <4 x i32> %19
  %27 = getelementptr inbounds i8, ptr %20, i64 16
  store <4 x i32> %25, ptr %20, align 4, !tbaa !5
  store <4 x i32> %26, ptr %27, align 4, !tbaa !5
  %index.next = add nuw i64 %index, 8
  %28 = icmp eq i64 %index.next, %n.vec
  br i1 %28, 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 = %.preheader.us, %middle.block
  %indvars.iv.ph = phi i64 [ 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
  %29 = getelementptr inbounds [481 x i32], ptr %2, i64 %indvars.iv24, i64 %indvars.iv.ph
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = getelementptr inbounds [481 x i32], ptr %3, i64 %indvars.iv24, i64 %indvars.iv.ph
  %32 = load i32, ptr %31, align 4, !tbaa !5
  %33 = add nsw i32 %32, %30
  %34 = getelementptr inbounds [481 x i32], ptr %4, i64 %indvars.iv24, i64 %indvars.iv.ph
  %35 = icmp sgt i32 %33, 998244352
  %36 = add nsw i32 %33, -998244353
  %spec.select.us.prol = select i1 %35, i32 %36, i32 %33
  store i32 %spec.select.us.prol, ptr %34, align 4, !tbaa !5
  %indvars.iv.next.prol = or disjoint i64 %indvars.iv.ph, 1
  br label %scalar.ph.prol.loopexit

scalar.ph.prol.loopexit:                          ; preds = %scalar.ph.prol, %scalar.ph.preheader
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %scalar.ph.preheader ], [ %indvars.iv.next.prol, %scalar.ph.prol ]
  %37 = icmp eq i64 %indvars.iv.ph, %13
  br i1 %37, label %._crit_edge.us, label %scalar.ph

scalar.ph:                                        ; preds = %scalar.ph.prol.loopexit, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %scalar.ph ], [ %indvars.iv.unr, %scalar.ph.prol.loopexit ]
  %38 = getelementptr inbounds [481 x i32], ptr %2, i64 %indvars.iv24, i64 %indvars.iv
  %39 = load i32, ptr %38, align 4, !tbaa !5
  %40 = getelementptr inbounds [481 x i32], ptr %3, i64 %indvars.iv24, i64 %indvars.iv
  %41 = load i32, ptr %40, align 4, !tbaa !5
  %42 = add nsw i32 %41, %39
  %43 = getelementptr inbounds [481 x i32], ptr %4, i64 %indvars.iv24, i64 %indvars.iv
  %44 = icmp sgt i32 %42, 998244352
  %45 = add nsw i32 %42, -998244353
  %spec.select.us = select i1 %44, i32 %45, i32 %42
  store i32 %spec.select.us, ptr %43, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %46 = getelementptr inbounds [481 x i32], ptr %2, i64 %indvars.iv24, i64 %indvars.iv.next
  %47 = load i32, ptr %46, align 4, !tbaa !5
  %48 = getelementptr inbounds [481 x i32], ptr %3, i64 %indvars.iv24, i64 %indvars.iv.next
  %49 = load i32, ptr %48, align 4, !tbaa !5
  %50 = add nsw i32 %49, %47
  %51 = getelementptr inbounds [481 x i32], ptr %4, i64 %indvars.iv24, i64 %indvars.iv.next
  %52 = icmp sgt i32 %50, 998244352
  %53 = add nsw i32 %50, -998244353
  %spec.select.us.1 = select i1 %52, i32 %53, i32 %50
  store i32 %spec.select.us.1, ptr %51, align 4, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %exitcond.not.1 = icmp eq i64 %indvars.iv.next.1, %wide.trip.count
  br i1 %exitcond.not.1, label %._crit_edge.us, label %scalar.ph, !llvm.loop !13

._crit_edge.us:                                   ; preds = %scalar.ph.prol.loopexit, %scalar.ph, %middle.block
  %indvars.iv.next25 = add nuw nsw i64 %indvars.iv24, 1
  %exitcond28.not = icmp eq i64 %indvars.iv.next25, %wide.trip.count27
  br i1 %exitcond28.not, label %._crit_edge21, label %.preheader.us, !llvm.loop !14

._crit_edge21:                                    ; preds = %._crit_edge.us, %5
  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, !10, !11}
!14 = distinct !{!14, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass