; LLVM IR from upupming/algorithm :: acwing/算法基础课/第四讲 数学知识/ 扩展欧几里得算法/877. 扩展欧几里得算法.ll (Z6extgcdiiRiS_)

; 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 i32 @_Z6extgcdiiRiS_(i32 noundef %0, i32 noundef %1, ptr noundef nonnull align 4 dereferenceable(4) %2, ptr noundef nonnull align 4 dereferenceable(4) %3) #0 {
  %5 = alloca i32, align 4
  %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 %18

14:                                               ; preds = %4
  %15 = load ptr, ptr %8, align 8, !tbaa !9
  store i32 1, ptr %15, align 4, !tbaa !5
  %16 = load ptr, ptr %9, align 8, !tbaa !9
  store i32 0, ptr %16, align 4, !tbaa !5
  %17 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %17, ptr %5, align 4
  br label %41

18:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %19 = load i32, ptr %7, align 4, !tbaa !5
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = load i32, ptr %7, align 4, !tbaa !5
  %22 = srem i32 %20, %21
  %23 = load ptr, ptr %8, align 8, !tbaa !9
  %24 = load ptr, ptr %9, align 8, !tbaa !9
  %25 = call noundef i32 @_Z6extgcdiiRiS_(i32 noundef %19, i32 noundef %22, ptr noundef nonnull align 4 dereferenceable(4) %23, ptr noundef nonnull align 4 dereferenceable(4) %24)
  store i32 %25, ptr %10, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %26 = load ptr, ptr %8, align 8, !tbaa !9
  %27 = load i32, ptr %26, align 4, !tbaa !5
  store i32 %27, ptr %11, align 4, !tbaa !5
  %28 = load ptr, ptr %9, align 8, !tbaa !9
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = load ptr, ptr %8, align 8, !tbaa !9
  store i32 %29, ptr %30, align 4, !tbaa !5
  %31 = load i32, ptr %11, align 4, !tbaa !5
  %32 = load i32, ptr %6, align 4, !tbaa !5
  %33 = load i32, ptr %7, align 4, !tbaa !5
  %34 = sdiv i32 %32, %33
  %35 = load ptr, ptr %9, align 8, !tbaa !9
  %36 = load i32, ptr %35, align 4, !tbaa !5
  %37 = mul nsw i32 %34, %36
  %38 = sub nsw i32 %31, %37
  %39 = load ptr, ptr %9, align 8, !tbaa !9
  store i32 %38, ptr %39, align 4, !tbaa !5
  %40 = load i32, ptr %10, align 4, !tbaa !5
  store i32 %40, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %41

41:                                               ; preds = %18, %14
  %42 = load i32, ptr %5, align 4
  ret i32 %42
}

; 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}


; 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 i32 @_Z6extgcdiiRiS_(i32 noundef %0, i32 noundef %1, ptr nocapture noundef nonnull align 4 dereferenceable(4) %2, ptr nocapture noundef nonnull align 4 dereferenceable(4) %3) local_unnamed_addr #0 {
  %5 = icmp eq i32 %1, 0
  br i1 %5, label %6, label %7

6:                                                ; preds = %4
  store i32 1, ptr %2, align 4, !tbaa !5
  br label %15

7:                                                ; preds = %4
  %8 = srem i32 %0, %1
  %9 = tail call noundef i32 @_Z6extgcdiiRiS_(i32 noundef %1, i32 noundef %8, ptr noundef nonnull align 4 dereferenceable(4) %2, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %11, ptr %2, align 4, !tbaa !5
  %12 = sdiv i32 %0, %1
  %13 = mul nsw i32 %11, %12
  %14 = sub nsw i32 %10, %13
  br label %15

15:                                               ; preds = %7, %6
  %storemerge = phi i32 [ %14, %7 ], [ 0, %6 ]
  %.0 = phi i32 [ %9, %7 ], [ %0, %6 ]
  store i32 %storemerge, ptr %3, align 4, !tbaa !5
  ret i32 %.0
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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