; LLVM IR from spirosmaggioros/AlgoPlus :: tests/algorithms/number_theory/gcd.ll (Z13euclidean_gcdll)

; 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 @_Z13euclidean_gcdll(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %25, %2
  %6 = load i64, ptr %3, align 8, !tbaa !5
  %7 = icmp sgt i64 %6, 0
  br i1 %7, label %8, label %11

8:                                                ; preds = %5
  %9 = load i64, ptr %4, align 8, !tbaa !5
  %10 = icmp sgt i64 %9, 0
  br label %11

11:                                               ; preds = %8, %5
  %12 = phi i1 [ false, %5 ], [ %10, %8 ]
  br i1 %12, label %13, label %26

13:                                               ; preds = %11
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = icmp sgt i64 %14, %15
  br i1 %16, label %17, label %21

17:                                               ; preds = %13
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = sub nsw i64 %18, %19
  store i64 %20, ptr %3, align 8, !tbaa !5
  br label %25

21:                                               ; preds = %13
  %22 = load i64, ptr %4, align 8, !tbaa !5
  %23 = load i64, ptr %3, align 8, !tbaa !5
  %24 = sub nsw i64 %22, %23
  store i64 %24, ptr %4, align 8, !tbaa !5
  br label %25

25:                                               ; preds = %21, %17
  br label %5, !llvm.loop !9

26:                                               ; preds = %11
  %27 = load i64, ptr %3, align 8, !tbaa !5
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = add nsw i64 %27, %28
  ret i64 %29
}

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" }

!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", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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 willreturn memory(none) uwtable
define dso_local noundef i64 @_Z13euclidean_gcdll(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i64 %0, 0
  %4 = icmp sgt i64 %1, 0
  %5 = and i1 %3, %4
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.013 = phi i64 [ %.1, %.lr.ph ], [ %1, %2 ]
  %.01012 = phi i64 [ %.111, %.lr.ph ], [ %0, %2 ]
  %6 = icmp ugt i64 %.01012, %.013
  %7 = select i1 %6, i64 %.013, i64 0
  %.111 = sub nsw i64 %.01012, %7
  %8 = select i1 %6, i64 0, i64 %.01012
  %.1 = sub nsw i64 %.013, %8
  %9 = icmp sgt i64 %.111, 0
  %10 = icmp sgt i64 %.1, 0
  %11 = select i1 %9, i1 %10, i1 false
  br i1 %11, label %.lr.ph, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.010.lcssa = phi i64 [ %0, %2 ], [ %.111, %.lr.ph ]
  %.0.lcssa = phi i64 [ %1, %2 ], [ %.1, %.lr.ph ]
  %12 = add nsw i64 %.0.lcssa, %.010.lcssa
  ret i64 %12
}

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)"}
!5 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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