; LLVM IR from abeaumont/competitive-programming :: cses/2064.ll (Z6modpowxx)

; 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: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z6modpowxx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 0, ptr %6, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %26, %2
  %8 = load i64, ptr %6, align 8, !tbaa !5
  %9 = shl i64 1, %8
  %10 = load i64, ptr %4, align 8, !tbaa !5
  %11 = icmp sle i64 %9, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  br label %34

13:                                               ; preds = %7
  %14 = load i64, ptr %4, align 8, !tbaa !5
  %15 = load i64, ptr %6, align 8, !tbaa !5
  %16 = shl i64 1, %15
  %17 = and i64 %14, %16
  %18 = icmp ne i64 %17, 0
  br i1 %18, label %19, label %25

19:                                               ; preds = %13
  %20 = load i64, ptr %3, align 8, !tbaa !5
  %21 = load i64, ptr %5, align 8, !tbaa !5
  %22 = mul nsw i64 %21, %20
  store i64 %22, ptr %5, align 8, !tbaa !5
  %23 = load i64, ptr %5, align 8, !tbaa !5
  %24 = srem i64 %23, 1000000007
  store i64 %24, ptr %5, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %19, %13
  br label %26

26:                                               ; preds = %25
  %27 = load i64, ptr %6, align 8, !tbaa !5
  %28 = add nsw i64 %27, 1
  store i64 %28, ptr %6, align 8, !tbaa !5
  %29 = load i64, ptr %3, align 8, !tbaa !5
  %30 = load i64, ptr %3, align 8, !tbaa !5
  %31 = mul nsw i64 %30, %29
  store i64 %31, ptr %3, align 8, !tbaa !5
  %32 = load i64, ptr %3, align 8, !tbaa !5
  %33 = srem i64 %32, 1000000007
  store i64 %33, ptr %3, align 8, !tbaa !5
  br label %7, !llvm.loop !9

34:                                               ; preds = %12
  %35 = load i64, ptr %5, align 8, !tbaa !5
  %36 = icmp slt i64 %35, 0
  br i1 %36, label %37, label %40

37:                                               ; preds = %34
  %38 = load i64, ptr %5, align 8, !tbaa !5
  %39 = add nsw i64 %38, 1000000007
  store i64 %39, ptr %5, align 8, !tbaa !5
  br label %40

40:                                               ; preds = %37, %34
  %41 = load i64, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 %41
}

; 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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef range(i64 0, 1000000007) i64 @_Z6modpowxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %.not19 = icmp slt i64 %1, 1
  br i1 %.not19, label %._crit_edge.thread, label %.lr.ph

._crit_edge:                                      ; preds = %11
  %3 = icmp slt i64 %.1.fr, 0
  %4 = add nsw i64 %.1.fr, 1000000007
  %spec.select = select i1 %3, i64 %4, i64 %.1.fr
  br label %._crit_edge.thread

._crit_edge.thread:                               ; preds = %._crit_edge, %2
  %5 = phi i64 [ 1, %2 ], [ %spec.select, %._crit_edge ]
  ret i64 %5

.lr.ph:                                           ; preds = %2, %11
  %6 = phi i64 [ %15, %11 ], [ 1, %2 ]
  %.022 = phi i64 [ %12, %11 ], [ 0, %2 ]
  %.01421 = phi i64 [ %.1.fr, %11 ], [ 1, %2 ]
  %.01520 = phi i64 [ %14, %11 ], [ %0, %2 ]
  %7 = and i64 %6, %1
  %.not18 = icmp eq i64 %7, 0
  br i1 %.not18, label %11, label %8

8:                                                ; preds = %.lr.ph
  %9 = mul nsw i64 %.01421, %.01520
  %10 = srem i64 %9, 1000000007
  br label %11

11:                                               ; preds = %.lr.ph, %8
  %.1 = phi i64 [ %10, %8 ], [ %.01421, %.lr.ph ]
  %.1.fr = freeze i64 %.1
  %12 = add nuw nsw i64 %.022, 1
  %13 = mul nsw i64 %.01520, %.01520
  %14 = urem i64 %13, 1000000007
  %15 = shl nuw i64 2, %.022
  %.not = icmp sgt i64 %15, %1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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