; LLVM IR from manishbisht/Competitive-Programming :: Skillenza/Code Golf Challenge 1 (Fibonacci numbers 1)

; 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 { [3 x [3 x i64]] }

@M0 = external dso_local global %struct.Matrix, align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [6 x i8], align 1

; 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 uwtable
declare dso_local noundef i64 @_Z3sumi(i32 noundef) #1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  store i64 1, ptr @M0, align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds ([3 x i64], ptr @M0, i64 0, i64 1), align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds ([3 x i64], ptr @M0, i64 0, i64 2), align 8, !tbaa !5
  store i64 0, ptr getelementptr inbounds ([3 x [3 x i64]], ptr @M0, i64 0, i64 1), align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds ([3 x i64], ptr getelementptr inbounds ([3 x [3 x i64]], ptr @M0, i64 0, i64 1), i64 0, i64 1), align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds ([3 x i64], ptr getelementptr inbounds ([3 x [3 x i64]], ptr @M0, i64 0, i64 1), i64 0, i64 2), align 8, !tbaa !5
  store i64 0, ptr getelementptr inbounds ([3 x [3 x i64]], ptr @M0, i64 0, i64 2), align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds ([3 x i64], ptr getelementptr inbounds ([3 x [3 x i64]], ptr @M0, i64 0, i64 2), i64 0, i64 1), align 8, !tbaa !5
  store i64 0, ptr getelementptr inbounds ([3 x i64], ptr getelementptr inbounds ([3 x [3 x i64]], ptr @M0, i64 0, i64 2), i64 0, i64 2), align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %6

6:                                                ; preds = %10, %0
  %7 = load i32, ptr %2, align 4, !tbaa !9
  %8 = add nsw i32 %7, -1
  store i32 %8, ptr %2, align 4, !tbaa !9
  %9 = icmp ne i32 %7, 0
  br i1 %9, label %10, label %22

10:                                               ; preds = %6
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.3, ptr noundef %3, ptr noundef %4)
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = call noundef i64 @_Z3sumi(i32 noundef %12)
  %14 = load i32, ptr %3, align 4, !tbaa !9
  %15 = sub nsw i32 %14, 1
  %16 = call noundef i64 @_Z3sumi(i32 noundef %15)
  %17 = sub nsw i64 %13, %16
  %18 = srem i64 %17, 1000000007
  %19 = add nsw i64 %18, 1000000007
  %20 = srem i64 %19, 1000000007
  %21 = call i32 (ptr, ...) @printf(ptr noundef @.str.4, i64 noundef %20)
  br label %6, !llvm.loop !11

22:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #3

declare i32 @printf(ptr noundef, ...) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #3 = { "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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 { [3 x [3 x i64]] }

@M0 = external dso_local local_unnamed_addr global %struct.Matrix, align 8
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [6 x i8], align 1

; 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 uwtable
declare dso_local noundef i64 @_Z3sumi(i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  store i64 1, ptr @M0, align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds (i8, ptr @M0, i64 8), align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds (i8, ptr @M0, i64 16), align 8, !tbaa !5
  store i64 0, ptr getelementptr inbounds (i8, ptr @M0, i64 24), align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds (i8, ptr @M0, i64 32), align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds (i8, ptr @M0, i64 40), align 8, !tbaa !5
  store i64 0, ptr getelementptr inbounds (i8, ptr @M0, i64 48), align 8, !tbaa !5
  store i64 1, ptr getelementptr inbounds (i8, ptr @M0, i64 56), align 8, !tbaa !5
  store i64 0, ptr getelementptr inbounds (i8, ptr @M0, i64 64), align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #4
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i32, ptr %1, align 4, !tbaa !9
  %6 = add nsw i32 %5, -1
  store i32 %6, ptr %1, align 4, !tbaa !9
  %.not1 = icmp eq i32 %5, 0
  br i1 %.not1, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %.lr.ph
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.3, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %8 = load i32, ptr %3, align 4, !tbaa !9
  %9 = call noundef i64 @_Z3sumi(i32 noundef %8)
  %10 = load i32, ptr %2, align 4, !tbaa !9
  %11 = add nsw i32 %10, -1
  %12 = call noundef i64 @_Z3sumi(i32 noundef %11)
  %13 = sub nsw i64 %9, %12
  %14 = srem i64 %13, 1000000007
  %15 = add nsw i64 %14, 1000000007
  %.cmp = icmp ugt i64 %14, -1000000008
  %16 = select i1 %.cmp, i64 %15, i64 %14
  %17 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4, i64 noundef %16)
  %18 = load i32, ptr %1, align 4, !tbaa !9
  %19 = add nsw i32 %18, -1
  store i32 %19, ptr %1, align 4, !tbaa !9
  %.not = icmp eq i32 %18, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #3 = { 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 #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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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