; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ/5976.ll (Z4initv)

; 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"

@num = external dso_local global [1000000 x i64], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z4initv() #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #2
  store i64 1, ptr %1, align 8, !tbaa !5
  store i64 1, ptr @num, align 16, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #2
  store i64 1, ptr %2, align 8, !tbaa !5
  br label %3

3:                                                ; preds = %15, %0
  %4 = load i64, ptr %2, align 8, !tbaa !5
  %5 = icmp slt i64 %4, 1000000
  br i1 %5, label %7, label %6

6:                                                ; preds = %3
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #2
  br label %18

7:                                                ; preds = %3
  %8 = load i64, ptr %1, align 8, !tbaa !5
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = mul nsw i64 %8, %9
  %11 = srem i64 %10, 1000000007
  store i64 %11, ptr %1, align 8, !tbaa !5
  %12 = load i64, ptr %1, align 8, !tbaa !5
  %13 = load i64, ptr %2, align 8, !tbaa !5
  %14 = getelementptr inbounds [1000000 x i64], ptr @num, i64 0, i64 %13
  store i64 %12, ptr %14, align 8, !tbaa !5
  br label %15

15:                                               ; preds = %7
  %16 = load i64, ptr %2, align 8, !tbaa !5
  %17 = add nsw i64 %16, 1
  store i64 %17, ptr %2, align 8, !tbaa !5
  br label %3, !llvm.loop !9

18:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 8, ptr %1) #2
  ret void
}

; 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

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 = distinct !{!9, !10}
!10 = !{!"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"

@num = external dso_local local_unnamed_addr global [1000000 x i64], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(write, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z4initv() local_unnamed_addr #0 {
  store i64 1, ptr @num, align 16, !tbaa !5
  br label %2

1:                                                ; preds = %2
  ret void

2:                                                ; preds = %2, %0
  %.08 = phi i64 [ 1, %0 ], [ %14, %2 ]
  %.067 = phi i64 [ 1, %0 ], [ %12, %2 ]
  %3 = mul nsw i64 %.08, %.067
  %4 = srem i64 %3, 1000000007
  %5 = getelementptr inbounds [1000000 x i64], ptr @num, i64 0, i64 %.08
  store i64 %4, ptr %5, align 8, !tbaa !5
  %6 = add nuw nsw i64 %.08, 1
  %7 = mul nsw i64 %6, %4
  %8 = srem i64 %7, 1000000007
  %9 = getelementptr inbounds [1000000 x i64], ptr @num, i64 0, i64 %6
  store i64 %8, ptr %9, align 8, !tbaa !5
  %10 = add nuw nsw i64 %.08, 2
  %11 = mul nsw i64 %10, %8
  %12 = srem i64 %11, 1000000007
  %13 = getelementptr inbounds [1000000 x i64], ptr @num, i64 0, i64 %10
  store i64 %12, ptr %13, align 8, !tbaa !5
  %14 = add nuw nsw i64 %.08, 3
  %exitcond.not.2 = icmp eq i64 %14, 1000000
  br i1 %exitcond.not.2, label %1, label %2, !llvm.loop !9
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(write, argmem: none, inaccessiblemem: none) 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" }

!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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass