; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ/1576（欧几里得求逆元）.ll (Z5exgcdiiRxS_)

; 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 @_Z5exgcdiiRxS_(i32 noundef %0, i32 noundef %1, ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3) #0 {
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !9
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = icmp eq i32 %12, 0
  br i1 %13, label %14, label %19

14:                                               ; preds = %4
  %15 = load ptr, ptr %8, align 8, !tbaa !9
  store i64 1, ptr %15, align 8, !tbaa !11
  %16 = load ptr, ptr %9, align 8, !tbaa !9
  store i64 0, ptr %16, align 8, !tbaa !11
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  store i64 %18, ptr %5, align 8
  br label %47

19:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %20 = load i32, ptr %7, align 4, !tbaa !5
  %21 = load i32, ptr %6, align 4, !tbaa !5
  %22 = load i32, ptr %7, align 4, !tbaa !5
  %23 = srem i32 %21, %22
  %24 = load ptr, ptr %8, align 8, !tbaa !9
  %25 = load ptr, ptr %9, align 8, !tbaa !9
  %26 = call noundef i64 @_Z5exgcdiiRxS_(i32 noundef %20, i32 noundef %23, ptr noundef nonnull align 8 dereferenceable(8) %24, ptr noundef nonnull align 8 dereferenceable(8) %25)
  %27 = trunc i64 %26 to i32
  store i32 %27, ptr %10, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %28 = load ptr, ptr %8, align 8, !tbaa !9
  %29 = load i64, ptr %28, align 8, !tbaa !11
  %30 = trunc i64 %29 to i32
  store i32 %30, ptr %11, align 4, !tbaa !5
  %31 = load ptr, ptr %9, align 8, !tbaa !9
  %32 = load i64, ptr %31, align 8, !tbaa !11
  %33 = load ptr, ptr %8, align 8, !tbaa !9
  store i64 %32, ptr %33, align 8, !tbaa !11
  %34 = load i32, ptr %11, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = load i32, ptr %6, align 4, !tbaa !5
  %37 = load i32, ptr %7, align 4, !tbaa !5
  %38 = sdiv i32 %36, %37
  %39 = sext i32 %38 to i64
  %40 = load ptr, ptr %9, align 8, !tbaa !9
  %41 = load i64, ptr %40, align 8, !tbaa !11
  %42 = mul nsw i64 %39, %41
  %43 = sub nsw i64 %35, %42
  %44 = load ptr, ptr %9, align 8, !tbaa !9
  store i64 %43, ptr %44, align 8, !tbaa !11
  %45 = load i32, ptr %10, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  store i64 %46, ptr %5, align 8
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %47

47:                                               ; preds = %19, %14
  %48 = load i64, ptr %5, align 8
  ret i64 %48
}

; 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long long", !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 range(i64 -2147483648, 2147483648) i64 @_Z5exgcdiiRxS_(i32 noundef %0, i32 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 = icmp eq i32 %1, 0
  br i1 %5, label %6, label %8

6:                                                ; preds = %4
  store i64 1, ptr %2, align 8, !tbaa !5
  %7 = sext i32 %0 to i64
  br label %common.ret

common.ret:                                       ; preds = %6, %8
  %.sink = phi i64 [ 0, %6 ], [ %17, %8 ]
  %common.ret.op = phi i64 [ %7, %6 ], [ %10, %8 ]
  store i64 %.sink, ptr %3, align 8
  ret i64 %common.ret.op

8:                                                ; preds = %4
  %9 = srem i32 %0, %1
  %10 = tail call noundef i64 @_Z5exgcdiiRxS_(i32 noundef %1, i32 noundef %9, ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = load i64, ptr %3, align 8, !tbaa !5
  store i64 %12, ptr %2, align 8, !tbaa !5
  %sext = shl i64 %11, 32
  %13 = ashr exact i64 %sext, 32
  %14 = sdiv i32 %0, %1
  %15 = sext i32 %14 to i64
  %16 = mul nsw i64 %12, %15
  %17 = sub nsw i64 %13, %16
  br label %common.ret
}

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: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,MergedLoadStoreMotionPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass