; LLVM IR from ravireddy07/cpp-book :: src/Code-Chef/Feb2021-Long/SUMXOR2.ll (Z2C1xx)

; 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 @_Z3mulxx(i64 noundef, i64 noundef) #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z3invx(i64 noundef) #2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z4tempx(i64 noundef) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z2C1xx(i64 noundef %0, i64 noundef %1) #2 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %9 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %9, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %10 = load i64, ptr %5, align 8, !tbaa !5
  store i64 %10, ptr %7, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %21, %2
  %12 = load i64, ptr %7, align 8, !tbaa !5
  %13 = icmp ne i64 %12, 0
  br i1 %13, label %14, label %26

14:                                               ; preds = %11
  %15 = load i64, ptr %7, align 8, !tbaa !5
  %16 = srem i64 %15, 998244353
  %17 = load i64, ptr %6, align 8, !tbaa !5
  %18 = srem i64 %17, 998244353
  %19 = icmp sgt i64 %16, %18
  br i1 %19, label %20, label %21

20:                                               ; preds = %14
  store i64 0, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %38

21:                                               ; preds = %14
  %22 = load i64, ptr %6, align 8, !tbaa !5
  %23 = sdiv i64 %22, 998244353
  store i64 %23, ptr %6, align 8, !tbaa !5
  %24 = load i64, ptr %7, align 8, !tbaa !5
  %25 = sdiv i64 %24, 998244353
  store i64 %25, ptr %7, align 8, !tbaa !5
  br label %11, !llvm.loop !9

26:                                               ; preds = %11
  %27 = load i64, ptr %4, align 8, !tbaa !5
  %28 = call noundef i64 @_Z4tempx(i64 noundef %27)
  %29 = load i64, ptr %5, align 8, !tbaa !5
  %30 = call noundef i64 @_Z4tempx(i64 noundef %29)
  %31 = load i64, ptr %4, align 8, !tbaa !5
  %32 = load i64, ptr %5, align 8, !tbaa !5
  %33 = sub nsw i64 %31, %32
  %34 = call noundef i64 @_Z4tempx(i64 noundef %33)
  %35 = call noundef i64 @_Z3mulxx(i64 noundef %30, i64 noundef %34)
  %36 = call noundef i64 @_Z3invx(i64 noundef %35)
  %37 = call noundef i64 @_Z3mulxx(i64 noundef %28, i64 noundef %36)
  store i64 %37, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %38

38:                                               ; preds = %26, %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %39 = load i64, ptr %3, align 8
  ret i64 %39
}

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 = { 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 #3 = { 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 nounwind uwtable
declare dso_local noundef i64 @_Z3mulxx(i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z3invx(i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z4tempx(i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z2C1xx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #1 {
  %.not14 = icmp eq i64 %1, 0
  br i1 %.not14, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %8
  %.016 = phi i64 [ %4, %8 ], [ %1, %2 ]
  %.01215 = phi i64 [ %6, %8 ], [ %0, %2 ]
  %3 = srem i64 %.016, 998244353
  %4 = sdiv i64 %.016, 998244353
  %5 = srem i64 %.01215, 998244353
  %6 = sdiv i64 %.01215, 998244353
  %7 = icmp sgt i64 %3, %5
  br i1 %7, label %.loopexit, label %8

8:                                                ; preds = %.lr.ph
  %.016.off = add i64 %.016, 998244352
  %.not = icmp ult i64 %.016.off, 1996488705
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %8, %2
  %9 = tail call noundef i64 @_Z4tempx(i64 noundef %0)
  %10 = tail call noundef i64 @_Z4tempx(i64 noundef %1)
  %11 = sub nsw i64 %0, %1
  %12 = tail call noundef i64 @_Z4tempx(i64 noundef %11)
  %13 = tail call noundef i64 @_Z3mulxx(i64 noundef %10, i64 noundef %12)
  %14 = tail call noundef i64 @_Z3invx(i64 noundef %13)
  %15 = tail call noundef i64 @_Z3mulxx(i64 noundef %9, i64 noundef %14)
  br label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %._crit_edge
  %.013 = phi i64 [ %15, %._crit_edge ], [ 0, %.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" }
attributes #1 = { 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" }

!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: DivRemPairsPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass