; LLVM IR from upupming/algorithm :: acwing/算法基础课/第四讲 数学知识/中国剩余定理/204. 表达整数的奇怪方式.ll (Z6extgcdxxRxS_)

; 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 @_Z6extgcdxxRxS_(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 i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i64, align 8
  %11 = alloca i32, align 4
  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
  %12 = load i64, ptr %7, align 8, !tbaa !5
  %13 = icmp eq i64 %12, 0
  br i1 %13, label %14, label %18

14:                                               ; preds = %4
  %15 = load ptr, ptr %8, align 8, !tbaa !9
  store i64 1, ptr %15, align 8, !tbaa !5
  %16 = load ptr, ptr %9, align 8, !tbaa !9
  store i64 0, ptr %16, align 8, !tbaa !5
  %17 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %17, ptr %5, align 8
  br label %43

18:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %19 = load i64, ptr %7, align 8, !tbaa !5
  %20 = load i64, ptr %6, align 8, !tbaa !5
  %21 = load i64, ptr %7, align 8, !tbaa !5
  %22 = srem i64 %20, %21
  %23 = load ptr, ptr %8, align 8, !tbaa !9
  %24 = load ptr, ptr %9, align 8, !tbaa !9
  %25 = call noundef i64 @_Z6extgcdxxRxS_(i64 noundef %19, i64 noundef %22, ptr noundef nonnull align 8 dereferenceable(8) %23, ptr noundef nonnull align 8 dereferenceable(8) %24)
  store i64 %25, ptr %10, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %26 = load ptr, ptr %8, align 8, !tbaa !9
  %27 = load i64, ptr %26, align 8, !tbaa !5
  %28 = trunc i64 %27 to i32
  store i32 %28, ptr %11, align 4, !tbaa !11
  %29 = load ptr, ptr %9, align 8, !tbaa !9
  %30 = load i64, ptr %29, align 8, !tbaa !5
  %31 = load ptr, ptr %8, align 8, !tbaa !9
  store i64 %30, ptr %31, align 8, !tbaa !5
  %32 = load i32, ptr %11, align 4, !tbaa !11
  %33 = sext i32 %32 to i64
  %34 = load i64, ptr %6, align 8, !tbaa !5
  %35 = load i64, ptr %7, align 8, !tbaa !5
  %36 = sdiv i64 %34, %35
  %37 = load ptr, ptr %9, align 8, !tbaa !9
  %38 = load i64, ptr %37, align 8, !tbaa !5
  %39 = mul nsw i64 %36, %38
  %40 = sub nsw i64 %33, %39
  %41 = load ptr, ptr %9, align 8, !tbaa !9
  store i64 %40, ptr %41, align 8, !tbaa !5
  %42 = load i64, ptr %10, align 8, !tbaa !5
  store i64 %42, ptr %5, align 8
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  br label %43

43:                                               ; preds = %18, %14
  %44 = load i64, ptr %5, align 8
  ret i64 %44
}

; 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 = !{!"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 = !{!12, !12, i64 0}
!12 = !{!"int", !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 @_Z6extgcdxxRxS_(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 = icmp eq i64 %1, 0
  br i1 %5, label %6, label %7

6:                                                ; preds = %4
  store i64 1, ptr %2, align 8, !tbaa !5
  br label %16

7:                                                ; preds = %4
  %8 = srem i64 %0, %1
  %9 = tail call noundef i64 @_Z6extgcdxxRxS_(i64 noundef %1, i64 noundef %8, ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %10 = load i64, ptr %2, align 8, !tbaa !5
  %11 = load i64, ptr %3, align 8, !tbaa !5
  store i64 %11, ptr %2, align 8, !tbaa !5
  %sext = shl i64 %10, 32
  %12 = ashr exact i64 %sext, 32
  %13 = sdiv i64 %0, %1
  %14 = mul nsw i64 %11, %13
  %15 = sub nsw i64 %12, %14
  br label %16

16:                                               ; preds = %7, %6
  %storemerge = phi i64 [ %15, %7 ], [ 0, %6 ]
  %.0 = phi i64 [ %9, %7 ], [ %0, %6 ]
  store i64 %storemerge, ptr %3, align 8, !tbaa !5
  ret i64 %.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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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