; LLVM IR from ncduy0303/Competitive-Programming :: Mathematics/GCD.ll (Z3lcexxx)

; 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
declare dso_local noundef i64 @_Z7inv_modxx(i64 noundef, i64 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z3lcexxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) #1 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i32, align 4
  store i64 %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %10 = load i64, ptr %5, align 8, !tbaa !5
  %11 = load i64, ptr %7, align 8, !tbaa !5
  %12 = call noundef i64 @_ZSt3gcdIxxENSt11common_typeIJT_T0_EE4typeES1_S2_(i64 noundef %10, i64 noundef %11) #3
  store i64 %12, ptr %8, align 8, !tbaa !5
  %13 = load i64, ptr %8, align 8, !tbaa !5
  %14 = icmp ne i64 %13, 1
  br i1 %14, label %15, label %31

15:                                               ; preds = %3
  %16 = load i64, ptr %6, align 8, !tbaa !5
  %17 = load i64, ptr %8, align 8, !tbaa !5
  %18 = srem i64 %16, %17
  %19 = icmp ne i64 %18, 0
  br i1 %19, label %20, label %21

20:                                               ; preds = %15
  store i64 -1, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %39

21:                                               ; preds = %15
  %22 = load i64, ptr %8, align 8, !tbaa !5
  %23 = load i64, ptr %5, align 8, !tbaa !5
  %24 = sdiv i64 %23, %22
  store i64 %24, ptr %5, align 8, !tbaa !5
  %25 = load i64, ptr %8, align 8, !tbaa !5
  %26 = load i64, ptr %6, align 8, !tbaa !5
  %27 = sdiv i64 %26, %25
  store i64 %27, ptr %6, align 8, !tbaa !5
  %28 = load i64, ptr %8, align 8, !tbaa !5
  %29 = load i64, ptr %7, align 8, !tbaa !5
  %30 = sdiv i64 %29, %28
  store i64 %30, ptr %7, align 8, !tbaa !5
  br label %31

31:                                               ; preds = %21, %3
  %32 = load i64, ptr %6, align 8, !tbaa !5
  %33 = load i64, ptr %5, align 8, !tbaa !5
  %34 = load i64, ptr %7, align 8, !tbaa !5
  %35 = call noundef i64 @_Z7inv_modxx(i64 noundef %33, i64 noundef %34)
  %36 = mul nsw i64 %32, %35
  %37 = load i64, ptr %7, align 8, !tbaa !5
  %38 = srem i64 %36, %37
  store i64 %38, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %39

39:                                               ; preds = %31, %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %40 = load i64, ptr %4, align 8
  ret i64 %40
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZSt3gcdIxxENSt11common_typeIJT_T0_EE4typeES1_S2_(i64 noundef, i64 noundef) #2

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 = { 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 #3 = { 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"}


; 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 uwtable
declare dso_local noundef i64 @_Z7inv_modxx(i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z3lcexxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = tail call noundef i64 @_ZSt3gcdIxxENSt11common_typeIJT_T0_EE4typeES1_S2_(i64 noundef %0, i64 noundef %2) #2
  %.not = icmp eq i64 %4, 1
  br i1 %.not, label %11, label %5

5:                                                ; preds = %3
  %6 = srem i64 %1, %4
  %7 = sdiv i64 %1, %4
  %.not20 = icmp eq i64 %6, 0
  br i1 %.not20, label %8, label %15

8:                                                ; preds = %5
  %9 = sdiv i64 %0, %4
  %10 = sdiv i64 %2, %4
  br label %11

11:                                               ; preds = %8, %3
  %.018 = phi i64 [ %9, %8 ], [ %0, %3 ]
  %.017 = phi i64 [ %7, %8 ], [ %1, %3 ]
  %.016 = phi i64 [ %10, %8 ], [ %2, %3 ]
  %12 = tail call noundef i64 @_Z7inv_modxx(i64 noundef %.018, i64 noundef %.016)
  %13 = mul nsw i64 %12, %.017
  %14 = srem i64 %13, %.016
  br label %15

15:                                               ; preds = %5, %11
  %.0 = phi i64 [ %14, %11 ], [ -1, %5 ]
  ret i64 %.0
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZSt3gcdIxxENSt11common_typeIJT_T0_EE4typeES1_S2_(i64 noundef, i64 noundef) local_unnamed_addr #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 = { 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 #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)"}


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