; LLVM IR from lzyrapx/Competitive-Programming :: Retired_code/Number-theory/BZOJ 2242（BSGS）.ll (Z5exgcdxxRxS_)

; 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 uwtable
define dso_local noundef i64 @_Z5exgcdxxRxS_(i64 noundef %0, i64 noundef %1, ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3) #1 {
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i64, align 8
  store i64 %0, ptr %6, align 8, !tbaa !5
  store i64 %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !9
  %11 = load i64, ptr %6, align 8, !tbaa !5
  %12 = icmp ne i64 %11, 0
  br i1 %12, label %17, label %13

13:                                               ; preds = %4
  %14 = load i64, ptr %7, align 8, !tbaa !5
  %15 = icmp ne i64 %14, 0
  br i1 %15, label %17, label %16

16:                                               ; preds = %13
  store i64 -1, ptr %5, align 8
  br label %42

17:                                               ; preds = %13, %4
  %18 = load i64, ptr %7, align 8, !tbaa !5
  %19 = icmp ne i64 %18, 0
  br i1 %19, label %24, label %20

20:                                               ; preds = %17
  %21 = load ptr, ptr %8, align 8, !tbaa !9
  store i64 1, ptr %21, align 8, !tbaa !5
  %22 = load ptr, ptr %9, align 8, !tbaa !9
  store i64 0, ptr %22, align 8, !tbaa !5
  %23 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %23, ptr %5, align 8
  br label %42

24:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %25 = load i64, ptr %7, align 8, !tbaa !5
  %26 = load i64, ptr %6, align 8, !tbaa !5
  %27 = load i64, ptr %7, align 8, !tbaa !5
  %28 = srem i64 %26, %27
  %29 = load ptr, ptr %9, align 8, !tbaa !9
  %30 = load ptr, ptr %8, align 8, !tbaa !9
  %31 = call noundef i64 @_Z5exgcdxxRxS_(i64 noundef %25, i64 noundef %28, ptr noundef nonnull align 8 dereferenceable(8) %29, ptr noundef nonnull align 8 dereferenceable(8) %30)
  store i64 %31, ptr %10, align 8, !tbaa !5
  %32 = load i64, ptr %6, align 8, !tbaa !5
  %33 = load i64, ptr %7, align 8, !tbaa !5
  %34 = sdiv i64 %32, %33
  %35 = load ptr, ptr %8, align 8, !tbaa !9
  %36 = load i64, ptr %35, align 8, !tbaa !5
  %37 = mul nsw i64 %34, %36
  %38 = load ptr, ptr %9, align 8, !tbaa !9
  %39 = load i64, ptr %38, align 8, !tbaa !5
  %40 = sub nsw i64 %39, %37
  store i64 %40, ptr %38, align 8, !tbaa !5
  %41 = load i64, ptr %10, align 8, !tbaa !5
  store i64 %41, ptr %5, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  br label %42

42:                                               ; preds = %24, %20, %16
  %43 = load i64, ptr %5, align 8
  ret i64 %43
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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" }
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 = !{!"any pointer", !7, i64 0}


; 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 memory(argmem: readwrite) uwtable
define dso_local noundef i64 @_Z5exgcdxxRxS_(i64 noundef %0, i64 noundef %1, ptr nocapture noundef nonnull align 8 dereferenceable(8) %2, ptr nocapture noundef nonnull align 8 dereferenceable(8) %3) local_unnamed_addr #0 {
  %5 = or i64 %1, %0
  %or.cond.not = icmp eq i64 %5, 0
  br i1 %or.cond.not, label %common.ret, label %6

6:                                                ; preds = %4
  %.not = icmp eq i64 %1, 0
  br i1 %.not, label %7, label %8

7:                                                ; preds = %6
  store i64 1, ptr %2, align 8, !tbaa !5
  br label %common.ret.sink.split

common.ret.sink.split:                            ; preds = %8, %7
  %.sink = phi i64 [ 0, %7 ], [ %15, %8 ]
  %common.ret.op.ph = phi i64 [ %0, %7 ], [ %10, %8 ]
  store i64 %.sink, ptr %3, align 8, !tbaa !5
  br label %common.ret

common.ret:                                       ; preds = %common.ret.sink.split, %4
  %common.ret.op = phi i64 [ -1, %4 ], [ %common.ret.op.ph, %common.ret.sink.split ]
  ret i64 %common.ret.op

8:                                                ; preds = %6
  %9 = srem i64 %0, %1
  %10 = tail call noundef i64 @_Z5exgcdxxRxS_(i64 noundef %1, i64 noundef %9, ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(8) %2)
  %11 = sdiv i64 %0, %1
  %12 = load i64, ptr %2, align 8, !tbaa !5
  %13 = mul nsw i64 %12, %11
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = sub nsw i64 %14, %13
  br label %common.ret.sink.split
}

attributes #0 = { mustprogress nofree nosync nounwind memory(argmem: readwrite) 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"}


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