; LLVM IR from kazunetakahashi/atcoder :: 2017/0128_ARC068/F.ll (Z5calc2xx)

; 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 @_Z5calc2xx(i64 noundef %0, i64 noundef %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  %8 = load i64, ptr %5, align 8, !tbaa !5
  %9 = icmp eq i64 %8, 1
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  store i64 1, ptr %3, align 8
  br label %43

11:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 0, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %12

12:                                               ; preds = %38, %11
  %13 = load i32, ptr %7, align 4, !tbaa !9
  %14 = sext i32 %13 to i64
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = sub nsw i64 %15, 1
  %17 = icmp sle i64 %14, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %41

19:                                               ; preds = %12
  %20 = load i64, ptr %5, align 8, !tbaa !5
  %21 = sub nsw i64 %20, 1
  %22 = load i32, ptr %7, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = sub nsw i64 %21, %23
  %25 = sub nsw i64 %24, 1
  %26 = trunc i64 %25 to i32
  %27 = load i64, ptr %4, align 8, !tbaa !5
  %28 = sub nsw i64 %27, 1
  %29 = load i32, ptr %7, align 4, !tbaa !9
  %30 = sext i32 %29 to i64
  %31 = sub nsw i64 %28, %30
  %32 = trunc i64 %31 to i32
  %33 = call noundef i64 @_Z1Cii(i32 noundef %26, i32 noundef %32)
  %34 = load i64, ptr %6, align 8, !tbaa !5
  %35 = add nsw i64 %34, %33
  store i64 %35, ptr %6, align 8, !tbaa !5
  %36 = load i64, ptr %6, align 8, !tbaa !5
  %37 = srem i64 %36, 1000000007
  store i64 %37, ptr %6, align 8, !tbaa !5
  br label %38

38:                                               ; preds = %19
  %39 = load i32, ptr %7, align 4, !tbaa !9
  %40 = add nsw i32 %39, 1
  store i32 %40, ptr %7, align 4, !tbaa !9
  br label %12, !llvm.loop !11

41:                                               ; preds = %18
  %42 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %42, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  br label %43

43:                                               ; preds = %41, %10
  %44 = load i64, ptr %3, align 8
  ret i64 %44
}

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 @_Z5calc2xx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i64 %1, 1
  br i1 %3, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %2
  %.not.not17 = icmp sgt i64 %0, 0
  br i1 %.not.not17, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.preheader ]
  %.01218 = phi i64 [ %12, %.lr.ph ], [ 0, %.preheader ]
  %4 = xor i64 %indvars.iv, -1
  %5 = add i64 %4, %1
  %6 = trunc i64 %5 to i32
  %7 = add i32 %6, -1
  %8 = add nsw i64 %4, %0
  %9 = trunc i64 %8 to i32
  %10 = tail call noundef i64 @_Z1Cii(i32 noundef %7, i32 noundef %9)
  %11 = add nsw i64 %10, %.01218
  %12 = srem i64 %11, 1000000007
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %0
  br i1 %exitcond.not, label %.loopexit, label %.lr.ph, !llvm.loop !5

.loopexit:                                        ; preds = %.lr.ph, %.preheader, %2
  %.013 = phi i64 [ 1, %2 ], [ 0, %.preheader ], [ %12, %.lr.ph ]
  ret i64 %.013
}

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: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass