; LLVM IR from viveakrt/Competitive-programing :: Codeforces/1592A_Gamer_Hemose.ll (ZN13number_theory3gcdExx)

; 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 @_ZN13number_theory3gcdExx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  %6 = load i64, ptr %4, align 8, !tbaa !5
  %7 = icmp eq i64 %6, 0
  br i1 %7, label %8, label %10

8:                                                ; preds = %2
  %9 = load i64, ptr %5, align 8, !tbaa !5
  store i64 %9, ptr %3, align 8
  br label %21

10:                                               ; preds = %2
  %11 = load i64, ptr %5, align 8, !tbaa !5
  %12 = icmp eq i64 %11, 0
  br i1 %12, label %13, label %15

13:                                               ; preds = %10
  %14 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %14, ptr %3, align 8
  br label %21

15:                                               ; preds = %10
  %16 = load i64, ptr %5, align 8, !tbaa !5
  %17 = load i64, ptr %4, align 8, !tbaa !5
  %18 = load i64, ptr %5, align 8, !tbaa !5
  %19 = srem i64 %17, %18
  %20 = call noundef i64 @_ZN13number_theory3gcdExx(i64 noundef %16, i64 noundef %19)
  store i64 %20, ptr %3, align 8
  br label %21

21:                                               ; preds = %15, %13, %8
  %22 = load i64, ptr %3, align 8
  ret i64 %22
}

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" }

!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 nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i64 @_ZN13number_theory3gcdExx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i64 %0, 0
  br i1 %3, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %4 = icmp eq i64 %1, 0
  br i1 %4, label %._crit_edge, label %tailrecurse

tailrecurse:                                      ; preds = %.lr.ph.preheader, %tailrecurse
  %.tr1115 = phi i64 [ %.tr101214, %tailrecurse ], [ %0, %.lr.ph.preheader ]
  %.tr101214 = phi i64 [ %5, %tailrecurse ], [ %1, %.lr.ph.preheader ]
  %5 = srem i64 %.tr1115, %.tr101214
  %6 = icmp eq i64 %5, 0
  br i1 %6, label %._crit_edge, label %tailrecurse

._crit_edge:                                      ; preds = %tailrecurse, %.lr.ph.preheader, %2
  %.0 = phi i64 [ %1, %2 ], [ %0, %.lr.ph.preheader ], [ %.tr101214, %tailrecurse ]
  ret i64 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) 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)"}


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