; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 01. Mathematics/20_Linear_Diophantine_with_two_variables.ll (Z15extended_euclidxxRxS_)

; 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 nounwind uwtable
define dso_local noundef i64 @_Z15extended_euclidxxRxS_(i64 noundef %0, i64 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 i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  %11 = alloca i64, align 8
  %12 = alloca i64, align 8
  store i64 %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %13 = load ptr, ptr %8, align 8, !tbaa !9
  store i64 0, ptr %13, align 8, !tbaa !5
  store i64 0, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %14 = load ptr, ptr %7, align 8, !tbaa !9
  store i64 1, ptr %14, align 8, !tbaa !5
  store i64 1, ptr %10, align 8, !tbaa !5
  br label %15

15:                                               ; preds = %18, %4
  %16 = load i64, ptr %6, align 8, !tbaa !5
  %17 = icmp ne i64 %16, 0
  br i1 %17, label %18, label %45

18:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #2
  %19 = load i64, ptr %5, align 8, !tbaa !5
  %20 = load i64, ptr %6, align 8, !tbaa !5
  %21 = sdiv i64 %19, %20
  store i64 %21, ptr %11, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #2
  %22 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %22, ptr %12, align 8, !tbaa !5
  %23 = load i64, ptr %5, align 8, !tbaa !5
  %24 = load i64, ptr %6, align 8, !tbaa !5
  %25 = srem i64 %23, %24
  store i64 %25, ptr %6, align 8, !tbaa !5
  %26 = load i64, ptr %12, align 8, !tbaa !5
  store i64 %26, ptr %5, align 8, !tbaa !5
  %27 = load i64, ptr %9, align 8, !tbaa !5
  store i64 %27, ptr %12, align 8, !tbaa !5
  %28 = load ptr, ptr %7, align 8, !tbaa !9
  %29 = load i64, ptr %28, align 8, !tbaa !5
  %30 = load i64, ptr %11, align 8, !tbaa !5
  %31 = load i64, ptr %9, align 8, !tbaa !5
  %32 = mul nsw i64 %30, %31
  %33 = sub nsw i64 %29, %32
  store i64 %33, ptr %9, align 8, !tbaa !5
  %34 = load i64, ptr %12, align 8, !tbaa !5
  %35 = load ptr, ptr %7, align 8, !tbaa !9
  store i64 %34, ptr %35, align 8, !tbaa !5
  %36 = load i64, ptr %10, align 8, !tbaa !5
  store i64 %36, ptr %12, align 8, !tbaa !5
  %37 = load ptr, ptr %8, align 8, !tbaa !9
  %38 = load i64, ptr %37, align 8, !tbaa !5
  %39 = load i64, ptr %11, align 8, !tbaa !5
  %40 = load i64, ptr %10, align 8, !tbaa !5
  %41 = mul nsw i64 %39, %40
  %42 = sub nsw i64 %38, %41
  store i64 %42, ptr %10, align 8, !tbaa !5
  %43 = load i64, ptr %12, align 8, !tbaa !5
  %44 = load ptr, ptr %8, align 8, !tbaa !9
  store i64 %43, ptr %44, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #2
  br label %15, !llvm.loop !11

45:                                               ; preds = %15
  %46 = load i64, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  ret i64 %46
}

; 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 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 = { 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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local noundef i64 @_Z15extended_euclidxxRxS_(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 {
  store i64 0, ptr %3, align 8, !tbaa !5
  store i64 1, ptr %2, align 8, !tbaa !5
  %.not24 = icmp eq i64 %1, 0
  br i1 %.not24, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4, %.lr.ph
  %.028 = phi i64 [ %.02127, %.lr.ph ], [ %0, %4 ]
  %.02127 = phi i64 [ %6, %.lr.ph ], [ %1, %4 ]
  %.02226 = phi i64 [ %12, %.lr.ph ], [ 1, %4 ]
  %.02325 = phi i64 [ %9, %.lr.ph ], [ 0, %4 ]
  %5 = sdiv i64 %.028, %.02127
  %6 = srem i64 %.028, %.02127
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = mul nsw i64 %5, %.02325
  %9 = sub nsw i64 %7, %8
  store i64 %.02325, ptr %2, align 8, !tbaa !5
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = mul nsw i64 %5, %.02226
  %12 = sub nsw i64 %10, %11
  store i64 %.02226, ptr %3, align 8, !tbaa !5
  %.not = icmp eq i64 %6, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %4
  %.0.lcssa = phi i64 [ %0, %4 ], [ %.02127, %.lr.ph ]
  ret i64 %.0.lcssa
}

attributes #0 = { mustprogress nofree norecurse 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"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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