; LLVM IR from kazunetakahashi/atcoder :: 2017/0408_ARC071/F.ll (Z3sumi)

; 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"

@SUM = external dso_local global [1000010 x i64], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z3sumi(i32 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = icmp slt i32 %4, 0
  br i1 %5, label %6, label %9

6:                                                ; preds = %1
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  store i64 %8, ptr %2, align 8
  br label %32

9:                                                ; preds = %1
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [1000010 x i64], ptr @SUM, i64 0, i64 %11
  %13 = load i64, ptr %12, align 8, !tbaa !9
  %14 = icmp ne i64 %13, -1
  br i1 %14, label %15, label %20

15:                                               ; preds = %9
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [1000010 x i64], ptr @SUM, i64 0, i64 %17
  %19 = load i64, ptr %18, align 8, !tbaa !9
  store i64 %19, ptr %2, align 8
  br label %32

20:                                               ; preds = %9
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = sub nsw i32 %21, 1
  %23 = call noundef i64 @_Z3sumi(i32 noundef %22)
  %24 = load i32, ptr %3, align 4, !tbaa !5
  %25 = sub nsw i32 %24, 1
  %26 = call noundef i64 @_Z2dpi(i32 noundef %25)
  %27 = add nsw i64 %23, %26
  %28 = srem i64 %27, 1000000007
  %29 = load i32, ptr %3, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [1000010 x i64], ptr @SUM, i64 0, i64 %30
  store i64 %28, ptr %31, align 8, !tbaa !9
  store i64 %28, ptr %2, align 8
  br label %32

32:                                               ; preds = %20, %15, %6
  %33 = load i64, ptr %2, align 8
  ret i64 %33
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z2dpi(i32 noundef) #0

attributes #0 = { 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" }

!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 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}


; 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"

@SUM = external dso_local local_unnamed_addr global [1000010 x i64], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z3sumi(i32 noundef %0) local_unnamed_addr #0 {
  %2 = icmp slt i32 %0, 0
  br i1 %2, label %3, label %5

3:                                                ; preds = %1
  %4 = sext i32 %0 to i64
  br label %common.ret10

5:                                                ; preds = %1
  %6 = zext nneg i32 %0 to i64
  %7 = getelementptr inbounds [1000010 x i64], ptr @SUM, i64 0, i64 %6
  %8 = load i64, ptr %7, align 8, !tbaa !5
  %.not = icmp eq i64 %8, -1
  br i1 %.not, label %9, label %common.ret10

common.ret10:                                     ; preds = %5, %3, %9
  %common.ret10.op = phi i64 [ %14, %9 ], [ %4, %3 ], [ %8, %5 ]
  ret i64 %common.ret10.op

9:                                                ; preds = %5
  %10 = add nsw i32 %0, -1
  %11 = tail call noundef i64 @_Z3sumi(i32 noundef %10)
  %12 = tail call noundef i64 @_Z2dpi(i32 noundef %10)
  %13 = add nsw i64 %12, %11
  %14 = srem i64 %13, 1000000007
  store i64 %14, ptr %7, align 8, !tbaa !5
  br label %common.ret10
}

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z2dpi(i32 noundef) local_unnamed_addr #0

attributes #0 = { 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" }

!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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass