; LLVM IR from tangjz/acm-icpc :: poj (3070)

; 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, [2 x [2 x i32]] }

@A = external dso_local global %struct.Matrix, align 4
@n = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [3 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 2, ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 1), align 4, !tbaa !5
  store i32 2, ptr @A, align 4, !tbaa !10
  store i32 1, ptr getelementptr inbounds ([2 x i32], ptr getelementptr inbounds ([2 x [2 x i32]], ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 2), i64 0, i64 1), i64 0, i64 1), align 4, !tbaa !11
  store i32 1, ptr getelementptr inbounds ([2 x [2 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 ([2 x i32], ptr getelementptr inbounds (%struct.Matrix, ptr @A, i32 0, i32 2), i64 0, i64 1), align 4, !tbaa !11
  br label %3

3:                                                ; preds = %11, %0
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n)
  %5 = icmp ne i32 %4, -1
  br i1 %5, label %6, label %9

6:                                                ; preds = %3
  %7 = load i32, ptr @n, align 4, !tbaa !11
  %8 = icmp ne i32 %7, -1
  br label %9

9:                                                ; preds = %6, %3
  %10 = phi i1 [ false, %3 ], [ %8, %6 ]
  br i1 %10, label %11, label %19

11:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 24, ptr %2) #4
  %12 = load i32, ptr @n, align 4, !tbaa !11
  %13 = add nsw i32 %12, 1
  call void @_ZN6Matrix3powEi(ptr dead_on_unwind writable sret(%struct.Matrix) align 4 %2, ptr noundef nonnull align 4 dereferenceable(24) @A, i32 noundef %13)
  %14 = getelementptr inbounds %struct.Matrix, ptr %2, i32 0, i32 2
  %15 = getelementptr inbounds [2 x [2 x i32]], ptr %14, i64 0, i64 0
  %16 = getelementptr inbounds [2 x i32], ptr %15, i64 0, i64 0
  %17 = load i32, ptr %16, align 4, !tbaa !11
  %18 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %17)
  call void @llvm.lifetime.end.p0(i64 24, ptr %2) #4
  br label %3, !llvm.loop !12

19:                                               ; preds = %9
  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(24), 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, [2 x [2 x i32]] }

@A = external dso_local global %struct.Matrix, align 4
@n = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [3 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 2, ptr getelementptr inbounds (i8, ptr @A, i64 4), align 4, !tbaa !5
  store i32 2, ptr @A, align 4, !tbaa !10
  store i32 1, ptr getelementptr inbounds (i8, ptr @A, i64 20), align 4, !tbaa !11
  store i32 1, ptr getelementptr inbounds (i8, ptr @A, i64 16), align 4, !tbaa !11
  store i32 1, ptr getelementptr inbounds (i8, ptr @A, i64 12), align 4, !tbaa !11
  %2 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n)
  %3 = icmp ne i32 %2, -1
  %4 = load i32, ptr @n, align 4
  %5 = icmp ne i32 %4, -1
  %6 = select i1 %3, i1 %5, i1 false
  br i1 %6, label %.lr.ph, label %._crit_edge

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

8:                                                ; preds = %.lr.ph, %8
  %9 = phi i32 [ %4, %.lr.ph ], [ %15, %8 ]
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %1) #4
  %10 = add nuw nsw i32 %9, 1
  call void @_ZN6Matrix3powEi(ptr dead_on_unwind nonnull writable sret(%struct.Matrix) align 4 %1, ptr noundef nonnull align 4 dereferenceable(24) @A, i32 noundef %10)
  %11 = load i32, ptr %7, align 4, !tbaa !11
  %12 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %11)
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %1) #4
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n)
  %14 = icmp ne i32 %13, -1
  %15 = load i32, ptr @n, align 4
  %16 = icmp ne i32 %15, -1
  %17 = select i1 %14, i1 %16, i1 false
  br i1 %17, label %8, label %._crit_edge, !llvm.loop !12

._crit_edge:                                      ; preds = %8, %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(24), 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, !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"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass