; LLVM IR from Chasmiccoder/Algos-for-Amigos :: Computer-Science/1-DSA-Fundamentals/p04_lowest_common_multiple.ll (Z7gcd_proxx)

; 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
declare dso_local noundef i64 @_Z4maxmxx(i64 noundef, i64 noundef) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z7gcd_proxx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %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
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = load i64, ptr %4, align 8, !tbaa !5
  %11 = call noundef i64 @_Z4maxmxx(i64 noundef %9, i64 noundef %10)
  store i64 %11, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %12 = load i64, ptr %3, align 8, !tbaa !5
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = add nsw i64 %12, %13
  %15 = load i64, ptr %5, align 8, !tbaa !5
  %16 = sub nsw i64 %14, %15
  store i64 %16, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %17 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %17, ptr %7, align 8, !tbaa !5
  br label %18

18:                                               ; preds = %21, %2
  %19 = load i64, ptr %7, align 8, !tbaa !5
  %20 = icmp ne i64 %19, 0
  br i1 %20, label %21, label %27

21:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %22 = load i64, ptr %5, align 8, !tbaa !5
  %23 = load i64, ptr %7, align 8, !tbaa !5
  %24 = srem i64 %22, %23
  store i64 %24, ptr %8, align 8, !tbaa !5
  %25 = load i64, ptr %7, align 8, !tbaa !5
  store i64 %25, ptr %5, align 8, !tbaa !5
  %26 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %26, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %18, !llvm.loop !9

27:                                               ; preds = %18
  %28 = load i64, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 %28
}

; 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 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 #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 = 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 nounwind uwtable
declare dso_local noundef i64 @_Z4maxmxx(i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z7gcd_proxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noundef i64 @_Z4maxmxx(i64 noundef %0, i64 noundef %1)
  %4 = add nsw i64 %1, %0
  %5 = sub i64 %4, %3
  %.not13 = icmp eq i64 %5, 0
  br i1 %.not13, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.015 = phi i64 [ %.01214, %.lr.ph ], [ %3, %2 ]
  %.01214 = phi i64 [ %6, %.lr.ph ], [ %5, %2 ]
  %6 = srem i64 %.015, %.01214
  %.not = icmp eq i64 %6, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.0.lcssa = phi i64 [ %3, %2 ], [ %.01214, %.lr.ph ]
  ret i64 %.0.lcssa
}

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


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