; LLVM IR from kazunetakahashi/atcoder :: 2017/0128_ARC068/F.ll (Z4calcx)

; 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"

; 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 nounwind uwtable
declare dso_local noundef i64 @_Z1Cii(i32 noundef, i32 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z4calcx(i64 noundef %0) #1 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  %6 = load i64, ptr %3, align 8, !tbaa !5
  %7 = icmp eq i64 %6, 0
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i64 1, ptr %2, align 8
  br label %32

9:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 1, ptr %5, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %27, %9
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = sext i32 %11 to i64
  %13 = load i64, ptr %3, align 8, !tbaa !5
  %14 = icmp sle i64 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %30

16:                                               ; preds = %10
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = sub nsw i64 %17, 1
  %19 = trunc i64 %18 to i32
  %20 = load i32, ptr %5, align 4, !tbaa !9
  %21 = sub nsw i32 %20, 1
  %22 = call noundef i64 @_Z1Cii(i32 noundef %19, i32 noundef %21)
  %23 = load i64, ptr %4, align 8, !tbaa !5
  %24 = add nsw i64 %23, %22
  store i64 %24, ptr %4, align 8, !tbaa !5
  %25 = load i64, ptr %4, align 8, !tbaa !5
  %26 = srem i64 %25, 1000000007
  store i64 %26, ptr %4, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %16
  %28 = load i32, ptr %5, align 4, !tbaa !9
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %5, align 4, !tbaa !9
  br label %10, !llvm.loop !11

30:                                               ; preds = %15
  %31 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %31, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  br label %32

32:                                               ; preds = %30, %8
  %33 = load i64, ptr %2, align 8
  ret i64 %33
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_Z1Cii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef range(i64 -1000000006, 1000000007) i64 @_Z4calcx(i64 noundef %0) local_unnamed_addr #0 {
  %2 = icmp eq i64 %0, 0
  br i1 %2, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %1
  %.not13 = icmp slt i64 %0, 1
  br i1 %.not13, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader
  %3 = trunc i64 %0 to i32
  %4 = add i32 %3, -1
  br label %5

5:                                                ; preds = %.lr.ph, %5
  %indvars.iv = phi i64 [ 1, %.lr.ph ], [ %indvars.iv.next, %5 ]
  %.01014 = phi i64 [ 0, %.lr.ph ], [ %10, %5 ]
  %6 = trunc i64 %indvars.iv to i32
  %7 = add i32 %6, -1
  %8 = tail call noundef i64 @_Z1Cii(i32 noundef %4, i32 noundef %7)
  %9 = add nsw i64 %8, %.01014
  %10 = srem i64 %9, 1000000007
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %.not.not = icmp slt i64 %indvars.iv, %0
  br i1 %.not.not, label %5, label %.loopexit, !llvm.loop !5

.loopexit:                                        ; preds = %5, %.preheader, %1
  %.011 = phi i64 [ 1, %1 ], [ 0, %.preheader ], [ %10, %5 ]
  ret i64 %.011
}

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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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