; LLVM IR from upupming/algorithm :: acwing/日常刷题/kick-start/571. 数学编码器 (main)

; 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"

%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@t = external dso_local global i32, align 4
@n = external dso_local global i32, align 4
@k = external dso_local global i32, align 4
@pow = external dso_local global [10010 x i32], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@.str = external hidden unnamed_addr constant [14 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  store i32 1, ptr @pow, align 16, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  store i32 1, ptr %2, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %24, %0
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = icmp slt i32 %10, 10010
  br i1 %11, label %13, label %12

12:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  br label %27

13:                                               ; preds = %9
  %14 = load i32, ptr %2, align 4, !tbaa !5
  %15 = sub nsw i32 %14, 1
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [10010 x i32], ptr @pow, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = mul nsw i32 %18, 2
  %20 = srem i32 %19, 1000000007
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [10010 x i32], ptr @pow, i64 0, i64 %22
  store i32 %20, ptr %23, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %13
  %25 = load i32, ptr %2, align 4, !tbaa !5
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr %2, align 4, !tbaa !5
  br label %9, !llvm.loop !9

27:                                               ; preds = %12
  %28 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @t)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %29

29:                                               ; preds = %74, %27
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = load i32, ptr @t, align 4, !tbaa !5
  %32 = icmp sle i32 %30, %31
  br i1 %32, label %34, label %33

33:                                               ; preds = %29
  store i32 5, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %77

34:                                               ; preds = %29
  %35 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @n)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %36

36:                                               ; preds = %67, %34
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = load i32, ptr @n, align 4, !tbaa !5
  %39 = icmp slt i32 %37, %38
  br i1 %39, label %41, label %40

40:                                               ; preds = %36
  store i32 8, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %70

41:                                               ; preds = %36
  %42 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @k)
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %43 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %43, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %44 = load i32, ptr @n, align 4, !tbaa !5
  %45 = sub nsw i32 %44, 1
  %46 = load i32, ptr %6, align 4, !tbaa !5
  %47 = sub nsw i32 %45, %46
  store i32 %47, ptr %8, align 4, !tbaa !5
  %48 = load i32, ptr %5, align 4, !tbaa !5
  %49 = sext i32 %48 to i64
  %50 = load i32, ptr %7, align 4, !tbaa !5
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds [10010 x i32], ptr @pow, i64 0, i64 %51
  %53 = load i32, ptr %52, align 4, !tbaa !5
  %54 = load i32, ptr %8, align 4, !tbaa !5
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [10010 x i32], ptr @pow, i64 0, i64 %55
  %57 = load i32, ptr %56, align 4, !tbaa !5
  %58 = sub nsw i32 %53, %57
  %59 = sext i32 %58 to i64
  %60 = mul nsw i64 1, %59
  %61 = load i32, ptr @k, align 4, !tbaa !5
  %62 = sext i32 %61 to i64
  %63 = mul nsw i64 %60, %62
  %64 = add nsw i64 %49, %63
  %65 = srem i64 %64, 1000000007
  %66 = trunc i64 %65 to i32
  store i32 %66, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %67

67:                                               ; preds = %41
  %68 = load i32, ptr %6, align 4, !tbaa !5
  %69 = add nsw i32 %68, 1
  store i32 %69, ptr %6, align 4, !tbaa !5
  br label %36, !llvm.loop !11

70:                                               ; preds = %40
  %71 = load i32, ptr %3, align 4, !tbaa !5
  %72 = load i32, ptr %5, align 4, !tbaa !5
  %73 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %71, i32 noundef %72)
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %74

74:                                               ; preds = %70
  %75 = load i32, ptr %3, align 4, !tbaa !5
  %76 = add nsw i32 %75, 1
  store i32 %76, ptr %3, align 4, !tbaa !5
  br label %29, !llvm.loop !12

77:                                               ; preds = %33
  ret i32 0
}

; 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

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #2

declare i32 @printf(ptr noundef, ...) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; 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"

%"class.std::basic_istream" = type { ptr, i64, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@t = external dso_local global i32, align 4
@n = external dso_local global i32, align 4
@k = external dso_local global i32, align 4
@pow = external dso_local local_unnamed_addr global [10010 x i32], align 16
@_ZSt3cin = external global %"class.std::basic_istream", align 8
@.str = external hidden unnamed_addr constant [14 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  store i32 1, ptr @pow, align 16, !tbaa !5
  br label %4

1:                                                ; preds = %4
  %2 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @t)
  %3 = load i32, ptr @t, align 4, !tbaa !5
  %.not21 = icmp slt i32 %3, 1
  br i1 %.not21, label %._crit_edge25, label %.lr.ph24

4:                                                ; preds = %9, %0
  %5 = phi i32 [ 1, %0 ], [ %11, %9 ]
  %indvars.iv = phi i64 [ 1, %0 ], [ %indvars.iv.next.1, %9 ]
  %6 = shl nsw i32 %5, 1
  %7 = srem i32 %6, 1000000007
  %8 = getelementptr inbounds [10010 x i32], ptr @pow, i64 0, i64 %indvars.iv
  store i32 %7, ptr %8, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 10010
  br i1 %exitcond.not, label %1, label %9, !llvm.loop !9

9:                                                ; preds = %4
  %10 = shl nsw i32 %7, 1
  %11 = srem i32 %10, 1000000007
  %12 = getelementptr inbounds [10010 x i32], ptr @pow, i64 0, i64 %indvars.iv.next
  store i32 %11, ptr %12, align 4, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  br label %4

._crit_edge25:                                    ; preds = %._crit_edge, %1
  ret i32 0

.lr.ph24:                                         ; preds = %1, %._crit_edge
  %.01522 = phi i32 [ %18, %._crit_edge ], [ 1, %1 ]
  %13 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @n)
  %14 = load i32, ptr @n, align 4, !tbaa !5
  %15 = icmp sgt i32 %14, 0
  br i1 %15, label %.lr.ph, label %._crit_edge

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %16 = trunc nsw i64 %36 to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %.lr.ph24
  %.017.lcssa = phi i32 [ 0, %.lr.ph24 ], [ %16, %._crit_edge.loopexit ]
  %17 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %.01522, i32 noundef %.017.lcssa)
  %18 = add nuw nsw i32 %.01522, 1
  %19 = load i32, ptr @t, align 4, !tbaa !5
  %.not.not = icmp slt i32 %.01522, %19
  br i1 %.not.not, label %.lr.ph24, label %._crit_edge25, !llvm.loop !11

.lr.ph:                                           ; preds = %.lr.ph24, %.lr.ph
  %indvars.iv27 = phi i64 [ %indvars.iv.next28, %.lr.ph ], [ 0, %.lr.ph24 ]
  %.01719 = phi i64 [ %36, %.lr.ph ], [ 0, %.lr.ph24 ]
  %20 = tail call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) @k)
  %21 = load i32, ptr @n, align 4, !tbaa !5
  %22 = trunc nuw nsw i64 %indvars.iv27 to i32
  %23 = xor i32 %22, -1
  %24 = add i32 %21, %23
  %25 = getelementptr inbounds [10010 x i32], ptr @pow, i64 0, i64 %indvars.iv27
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = sext i32 %24 to i64
  %28 = getelementptr inbounds [10010 x i32], ptr @pow, i64 0, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = sub nsw i32 %26, %29
  %31 = sext i32 %30 to i64
  %32 = load i32, ptr @k, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = mul nsw i64 %31, %33
  %35 = add nsw i64 %34, %.01719
  %36 = srem i64 %35, 1000000007
  %indvars.iv.next28 = add nuw nsw i64 %indvars.iv27, 1
  %37 = sext i32 %21 to i64
  %38 = icmp slt i64 %indvars.iv.next28, %37
  br i1 %38, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !12
}

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

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

!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"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass