; LLVM IR from tangjz/acm-icpc :: poj (3420)

; 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.Matrix = type { i32, i32, [5 x [5 x i32]] }

@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@A = external dso_local global %struct.Matrix, align 4
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca %struct.Matrix, align 4
  store i32 0, ptr %1, align 4
  store i32 5, ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 1), align 4, !tbaa !5
  store i32 5, ptr @A, align 4, !tbaa !10
  store i32 1, ptr getelementptr inbounds ([5 x i32], ptr getelementptr inbounds ([5 x [5 x i32]], ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 2), i64 0, i64 4), i64 0, i64 2), align 4, !tbaa !11
  store i32 1, ptr getelementptr inbounds ([5 x i32], ptr getelementptr inbounds ([5 x [5 x i32]], ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 2), i64 0, i64 3), i64 0, i64 3), align 4, !tbaa !11
  store i32 1, ptr getelementptr inbounds ([5 x [5 x i32]], ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 2), i64 0, i64 3), align 4, !tbaa !11
  store i32 1, ptr getelementptr inbounds ([5 x i32], ptr getelementptr inbounds ([5 x [5 x i32]], ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 2), i64 0, i64 2), i64 0, i64 4), align 4, !tbaa !11
  store i32 1, ptr getelementptr inbounds ([5 x [5 x i32]], ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 2), i64 0, i64 2), align 4, !tbaa !11
  store i32 1, ptr getelementptr inbounds ([5 x [5 x i32]], ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 2), i64 0, i64 1), align 4, !tbaa !11
  store i32 1, ptr getelementptr inbounds ([5 x i32], ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 2), i64 0, i64 2), align 4, !tbaa !11
  store i32 1, ptr getelementptr inbounds ([5 x i32], ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 2), i64 0, i64 1), align 4, !tbaa !11
  store i32 1, ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 2), align 4, !tbaa !11
  store i32 2, ptr getelementptr inbounds ([5 x i32], ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 2), i64 0, i64 3), align 4, !tbaa !11
  br label %3

3:                                                ; preds = %13, %0
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n, ptr noundef @m)
  %5 = icmp eq i32 %4, 2
  br i1 %5, label %6, label %11

6:                                                ; preds = %3
  %7 = load i32, ptr @n, align 4, !tbaa !11
  %8 = load i32, ptr @m, align 4, !tbaa !11
  %9 = add nsw i32 %7, %8
  %10 = icmp ne i32 %9, 0
  br label %11

11:                                               ; preds = %6, %3
  %12 = phi i1 [ false, %3 ], [ %10, %6 ]
  br i1 %12, label %13, label %20

13:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 108, ptr %2) #4
  %14 = load i32, ptr @n, align 4, !tbaa !11
  call void @_ZN6Matrix3powEi(ptr dead_on_unwind writable sret(%struct.Matrix) align 4 %2, ptr noundef nonnull align 4 dereferenceable(108) @A, i32 noundef %14)
  %15 = getelementptr inbounds %struct.Matrix, ptr %2, i32 0, i32 2
  %16 = getelementptr inbounds [5 x [5 x i32]], ptr %15, i64 0, i64 0
  %17 = getelementptr inbounds [5 x i32], ptr %16, i64 0, i64 0
  %18 = load i32, ptr %17, align 4, !tbaa !11
  %19 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %18)
  call void @llvm.lifetime.end.p0(i64 108, ptr %2) #4
  br label %3, !llvm.loop !12

20:                                               ; preds = %11
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #1

declare i32 @printf(ptr noundef, ...) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN6Matrix3powEi(ptr dead_on_unwind noalias writable sret(%struct.Matrix) align 4, ptr noundef nonnull align 4 dereferenceable(108), i32 noundef) #3 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

attributes #0 = { mustprogress norecurse 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 = { "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 nosync 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, !7, i64 4}
!6 = !{!"_ZTS6Matrix", !7, i64 0, !7, i64 4, !8, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 0}
!11 = !{!7, !7, i64 0}
!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.Matrix = type { i32, i32, [5 x [5 x i32]] }

@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@A = external dso_local global %struct.Matrix, align 4
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca %struct.Matrix, align 4
  store i32 1, ptr getelementptr inbounds (i8, ptr @A, i64 96), align 4, !tbaa !5
  store i32 1, ptr getelementptr inbounds (i8, ptr @A, i64 80), align 4, !tbaa !5
  store i32 1, ptr getelementptr inbounds (i8, ptr @A, i64 68), align 4, !tbaa !5
  store i32 1, ptr getelementptr inbounds (i8, ptr @A, i64 64), align 4, !tbaa !5
  store i32 1, ptr getelementptr inbounds (i8, ptr @A, i64 48), align 4, !tbaa !5
  store i32 1, ptr getelementptr inbounds (i8, ptr @A, i64 28), align 4, !tbaa !5
  store i32 1, ptr getelementptr inbounds (i8, ptr @A, i64 16), align 4, !tbaa !5
  store <4 x i32> <i32 5, i32 5, i32 1, i32 1>, ptr @A, align 4, !tbaa !5
  store i32 2, ptr getelementptr inbounds (i8, ptr @A, i64 20), align 4, !tbaa !5
  %2 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n, ptr noundef nonnull @m)
  %3 = icmp eq i32 %2, 2
  %4 = load i32, ptr @n, align 4
  %5 = load i32, ptr @m, align 4
  %6 = sub i32 0, %5
  %7 = icmp ne i32 %4, %6
  %8 = select i1 %3, i1 %7, i1 false
  br i1 %8, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0
  %9 = getelementptr inbounds i8, ptr %1, i64 8
  br label %10

10:                                               ; preds = %.lr.ph, %10
  %11 = phi i32 [ %4, %.lr.ph ], [ %16, %10 ]
  call void @llvm.lifetime.start.p0(i64 108, ptr nonnull %1) #4
  call void @_ZN6Matrix3powEi(ptr dead_on_unwind nonnull writable sret(%struct.Matrix) align 4 %1, ptr noundef nonnull align 4 dereferenceable(108) @A, i32 noundef %11)
  %12 = load i32, ptr %9, align 4, !tbaa !5
  %13 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %12)
  call void @llvm.lifetime.end.p0(i64 108, ptr nonnull %1) #4
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n, ptr noundef nonnull @m)
  %15 = icmp eq i32 %14, 2
  %16 = load i32, ptr @n, align 4
  %17 = load i32, ptr @m, align 4
  %18 = sub i32 0, %17
  %19 = icmp ne i32 %16, %18
  %20 = select i1 %15, i1 %19, i1 false
  br i1 %20, label %10, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %10, %0
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN6Matrix3powEi(ptr dead_on_unwind noalias writable sret(%struct.Matrix) align 4, ptr noundef nonnull align 4 dereferenceable(108), i32 noundef) local_unnamed_addr #3 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

attributes #0 = { mustprogress norecurse 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 = { nofree nounwind "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 nocallback nofree nosync 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 = !{!"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,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SLPVectorizerPass,SROAPass,SimplifyCFGPass,TailCallElimPass