; LLVM IR from DionysiosB/CodeForces :: 0600-0699/603B-MoodularArithmetic.ll (Z6modExpxxx)

; 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 uwtable
define dso_local noundef i64 @_Z6modExpxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  store i64 %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !5
  %10 = load i64, ptr %6, align 8, !tbaa !5
  %11 = icmp eq i64 %10, 0
  br i1 %11, label %12, label %13

12:                                               ; preds = %3
  store i64 1, ptr %4, align 8
  br label %38

13:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %14 = load i64, ptr %5, align 8, !tbaa !5
  %15 = load i64, ptr %6, align 8, !tbaa !5
  %16 = sdiv i64 %15, 2
  %17 = load i64, ptr %7, align 8, !tbaa !5
  %18 = call noundef i64 @_Z6modExpxxx(i64 noundef %14, i64 noundef %16, i64 noundef %17)
  store i64 %18, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %19 = load i64, ptr %8, align 8, !tbaa !5
  %20 = load i64, ptr %8, align 8, !tbaa !5
  %21 = mul nsw i64 %19, %20
  %22 = load i64, ptr %7, align 8, !tbaa !5
  %23 = srem i64 %21, %22
  %24 = load i64, ptr %6, align 8, !tbaa !5
  %25 = srem i64 %24, 2
  %26 = icmp ne i64 %25, 0
  br i1 %26, label %27, label %29

27:                                               ; preds = %13
  %28 = load i64, ptr %5, align 8, !tbaa !5
  br label %30

29:                                               ; preds = %13
  br label %30

30:                                               ; preds = %29, %27
  %31 = phi i64 [ %28, %27 ], [ 1, %29 ]
  %32 = load i64, ptr %7, align 8, !tbaa !5
  %33 = srem i64 %31, %32
  %34 = mul nsw i64 %23, %33
  store i64 %34, ptr %9, align 8, !tbaa !5
  %35 = load i64, ptr %9, align 8, !tbaa !5
  %36 = load i64, ptr %7, align 8, !tbaa !5
  %37 = srem i64 %35, %36
  store i64 %37, ptr %4, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %38

38:                                               ; preds = %30, %12
  %39 = load i64, ptr %4, align 8
  ret i64 %39
}

; 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 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"}


; 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 nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i64 @_Z6modExpxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq i64 %1, 0
  br i1 %4, label %common.ret14, label %5

common.ret14:                                     ; preds = %3, %5
  %common.ret14.op = phi i64 [ %14, %5 ], [ 1, %3 ]
  ret i64 %common.ret14.op

5:                                                ; preds = %3
  %6 = sdiv i64 %1, 2
  %7 = tail call noundef i64 @_Z6modExpxxx(i64 noundef %0, i64 noundef %6, i64 noundef %2)
  %8 = mul nsw i64 %7, %7
  %9 = srem i64 %8, %2
  %10 = and i64 %1, 1
  %.not = icmp eq i64 %10, 0
  %11 = select i1 %.not, i64 1, i64 %0
  %12 = srem i64 %11, %2
  %13 = mul nsw i64 %12, %9
  %14 = srem i64 %13, %2
  br label %common.ret14
}

attributes #0 = { mustprogress nofree 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)"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass