; LLVM IR from VastoLorde95/Competitive-Programming :: CodeChef/LONG/APRIL15/CSEQ/cseq.ll (Z7factMODxx)

; 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"

@fact = external dso_local global [1000005 x i64], align 16

; 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
define dso_local noundef i64 @_Z7factMODxx(i64 noundef %0, i64 noundef %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = 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
  br label %6

6:                                                ; preds = %28, %2
  %7 = load i64, ptr %3, align 8, !tbaa !5
  %8 = icmp sgt i64 %7, 0
  br i1 %8, label %9, label %29

9:                                                ; preds = %6
  %10 = load i64, ptr %5, align 8, !tbaa !5
  %11 = load i64, ptr %3, align 8, !tbaa !5
  %12 = load i64, ptr %4, align 8, !tbaa !5
  %13 = srem i64 %11, %12
  %14 = getelementptr inbounds [1000005 x i64], ptr @fact, i64 0, i64 %13
  %15 = load i64, ptr %14, align 8, !tbaa !5
  %16 = mul nsw i64 %10, %15
  %17 = load i64, ptr %4, align 8, !tbaa !5
  %18 = srem i64 %16, %17
  store i64 %18, ptr %5, align 8, !tbaa !5
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = load i64, ptr %3, align 8, !tbaa !5
  %21 = sdiv i64 %20, %19
  store i64 %21, ptr %3, align 8, !tbaa !5
  %22 = srem i64 %21, 2
  %23 = icmp sgt i64 %22, 0
  br i1 %23, label %24, label %28

24:                                               ; preds = %9
  %25 = load i64, ptr %4, align 8, !tbaa !5
  %26 = load i64, ptr %5, align 8, !tbaa !5
  %27 = sub nsw i64 %25, %26
  store i64 %27, ptr %5, align 8, !tbaa !5
  br label %28

28:                                               ; preds = %24, %9
  br label %6, !llvm.loop !9

29:                                               ; preds = %6
  %30 = load i64, ptr %5, align 8, !tbaa !5
  %31 = load i64, ptr %4, align 8, !tbaa !5
  %32 = srem i64 %30, %31
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 %32
}

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 = 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"

@fact = external dso_local local_unnamed_addr global [1000005 x i64], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i64 @_Z7factMODxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i64 %0, 0
  br i1 %3, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.013 = phi i64 [ %spec.select, %.lr.ph ], [ 1, %2 ]
  %.01112 = phi i64 [ %9, %.lr.ph ], [ %0, %2 ]
  %4 = srem i64 %.01112, %1
  %5 = getelementptr inbounds [1000005 x i64], ptr @fact, i64 0, i64 %4
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %7 = mul nsw i64 %6, %.013
  %8 = srem i64 %7, %1
  %9 = sdiv i64 %.01112, %1
  %10 = and i64 %9, -9223372036854775807
  %11 = icmp eq i64 %10, 1
  %12 = sub nsw i64 %1, %8
  %spec.select = select i1 %11, i64 %12, i64 %8
  %13 = icmp sgt i64 %9, 0
  br i1 %13, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.0.lcssa = phi i64 [ 1, %2 ], [ %spec.select, %.lr.ph ]
  %14 = srem i64 %.0.lcssa, %1
  ret i64 %14
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: 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 = !{!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"}


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