; LLVM IR from bqi343/cp-notebook :: Contests/USACO Solutions/2020-21/Dec/Plat (space_matrix)

; 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"

%struct.mint = type { i32 }

@N = external dso_local global i32, align 4

; 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
declare dso_local void @_ZN4mintILi1000000007ELi5EEC2Ex(ptr noundef nonnull align 4 dereferenceable(4), i64 noundef) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorI4mintILi1000000007ELi5EESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

; 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) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZN4mintILi1000000007ELi5EEpLERKS0_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local i32 @_Zml4mintILi1000000007ELi5EERKS0_(i32, ptr noundef nonnull align 4 dereferenceable(4)) #3

; Function Attrs: mustprogress uwtable
define dso_local i32 @_Z3dotSt6vectorI4mintILi1000000007ELi5EESaIS1_EES3_(ptr noundef %0, ptr noundef %1) #3 {
  %3 = alloca %struct.mint, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca %struct.mint, align 4
  %8 = alloca %struct.mint, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @_ZN4mintILi1000000007ELi5EEC2Ex(ptr noundef nonnull align 4 dereferenceable(4) %3, i64 noundef 0)
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %26, %2
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = load i32, ptr @N, align 4, !tbaa !9
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  br label %29

14:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = sext i32 %15 to i64
  %17 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorI4mintILi1000000007ELi5EESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %16) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %8, ptr align 4 %17, i64 4, i1 false), !tbaa.struct !11
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  %20 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorI4mintILi1000000007ELi5EESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %19) #4
  %21 = getelementptr inbounds %struct.mint, ptr %8, i32 0, i32 0
  %22 = load i32, ptr %21, align 4
  %23 = call i32 @_Zml4mintILi1000000007ELi5EERKS0_(i32 %22, ptr noundef nonnull align 4 dereferenceable(4) %20)
  %24 = getelementptr inbounds %struct.mint, ptr %7, i32 0, i32 0
  store i32 %23, ptr %24, align 4
  %25 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZN4mintILi1000000007ELi5EEpLERKS0_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %7)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  br label %26

26:                                               ; preds = %14
  %27 = load i32, ptr %6, align 4, !tbaa !9
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %6, align 4, !tbaa !9
  br label %9, !llvm.loop !12

29:                                               ; preds = %13
  %30 = getelementptr inbounds %struct.mint, ptr %3, i32 0, i32 0
  %31 = load i32, ptr %30, align 4
  ret i32 %31
}

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { mustprogress 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 #4 = { 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 = !{i64 0, i64 4, !9}
!12 = distinct !{!12, !13}
!13 = !{!"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"

%struct.mint = type { i32 }

@N = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4mintILi1000000007ELi5EEC2Ex(ptr noundef nonnull align 4 dereferenceable(4), i64 noundef) unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorI4mintILi1000000007ELi5EESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZN4mintILi1000000007ELi5EEpLERKS0_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local i32 @_Zml4mintILi1000000007ELi5EERKS0_(i32, ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
define dso_local i32 @_Z3dotSt6vectorI4mintILi1000000007ELi5EESaIS1_EES3_(ptr noundef %0, ptr noundef %1) local_unnamed_addr #2 {
  %3 = alloca %struct.mint, align 4
  %4 = alloca %struct.mint, align 4
  call void @_ZN4mintILi1000000007ELi5EEC2Ex(ptr noundef nonnull align 4 dereferenceable(4) %3, i64 noundef 0)
  %5 = load i32, ptr @N, align 4, !tbaa !5
  %6 = icmp sgt i32 %5, 0
  br i1 %6, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  %7 = load i32, ptr %3, align 4
  ret i32 %7

.lr.ph:                                           ; preds = %2, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %2 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  %8 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorI4mintILi1000000007ELi5EESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv) #3
  %.sroa.0.0.copyload = load i32, ptr %8, align 4, !tbaa !5
  %9 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorI4mintILi1000000007ELi5EESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %indvars.iv) #3
  %10 = call i32 @_Zml4mintILi1000000007ELi5EERKS0_(i32 %.sroa.0.0.copyload, ptr noundef nonnull align 4 dereferenceable(4) %9)
  store i32 %10, ptr %4, align 4
  %11 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZN4mintILi1000000007ELi5EEpLERKS0_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %4)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %12 = load i32, ptr @N, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = icmp slt i64 %indvars.iv.next, %13
  br i1 %14, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

attributes #0 = { mustprogress 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 = { mustprogress 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 #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 = !{!"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: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass