; LLVM IR from tangjz/acm-icpc :: TDL_training/2015-10-05/E - Equation - lzy.ll (Zco4Frac)

; 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"

%struct.Frac = type { i64, i64 }

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z3gcdxx(i64 noundef, i64 noundef) #0

; 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

; Function Attrs: mustprogress uwtable
define dso_local { i64, i64 } @_Zco4Frac(i64 %0, i64 %1) #0 {
  %3 = alloca %struct.Frac, align 8
  %4 = alloca %struct.Frac, align 8
  %5 = alloca i64, align 8
  %6 = getelementptr inbounds { i64, i64 }, ptr %4, i32 0, i32 0
  store i64 %0, ptr %6, align 8
  %7 = getelementptr inbounds { i64, i64 }, ptr %4, i32 0, i32 1
  store i64 %1, ptr %7, align 8
  %8 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 0
  %9 = load i64, ptr %8, align 8, !tbaa !5
  %10 = icmp eq i64 %9, 0
  br i1 %10, label %11, label %16

11:                                               ; preds = %2
  %12 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 1
  %13 = load i64, ptr %12, align 8, !tbaa !10
  %14 = icmp eq i64 %13, 0
  br i1 %14, label %15, label %16

15:                                               ; preds = %11
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %3, ptr align 8 %4, i64 16, i1 false), !tbaa.struct !11
  br label %55

16:                                               ; preds = %11, %2
  %17 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 0
  %18 = load i64, ptr %17, align 8, !tbaa !5
  %19 = icmp eq i64 %18, 0
  br i1 %19, label %20, label %22

20:                                               ; preds = %16
  %21 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 1
  store i64 1, ptr %21, align 8, !tbaa !10
  br label %22

22:                                               ; preds = %20, %16
  %23 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 1
  %24 = load i64, ptr %23, align 8, !tbaa !10
  %25 = icmp eq i64 %24, 0
  br i1 %25, label %26, label %28

26:                                               ; preds = %22
  %27 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 0
  store i64 1, ptr %27, align 8, !tbaa !5
  br label %28

28:                                               ; preds = %26, %22
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %29 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 0
  %30 = load i64, ptr %29, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 1
  %32 = load i64, ptr %31, align 8, !tbaa !10
  %33 = call noundef i64 @_Z3gcdxx(i64 noundef %30, i64 noundef %32)
  store i64 %33, ptr %5, align 8, !tbaa !12
  %34 = load i64, ptr %5, align 8, !tbaa !12
  %35 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 0
  %36 = load i64, ptr %35, align 8, !tbaa !5
  %37 = sdiv i64 %36, %34
  store i64 %37, ptr %35, align 8, !tbaa !5
  %38 = load i64, ptr %5, align 8, !tbaa !12
  %39 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 1
  %40 = load i64, ptr %39, align 8, !tbaa !10
  %41 = sdiv i64 %40, %38
  store i64 %41, ptr %39, align 8, !tbaa !10
  %42 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 1
  %43 = load i64, ptr %42, align 8, !tbaa !10
  %44 = icmp slt i64 %43, 0
  br i1 %44, label %45, label %54

45:                                               ; preds = %28
  %46 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 0
  %47 = load i64, ptr %46, align 8, !tbaa !5
  %48 = sub nsw i64 0, %47
  %49 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 0
  store i64 %48, ptr %49, align 8, !tbaa !5
  %50 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 1
  %51 = load i64, ptr %50, align 8, !tbaa !10
  %52 = sub nsw i64 0, %51
  %53 = getelementptr inbounds %struct.Frac, ptr %4, i32 0, i32 1
  store i64 %52, ptr %53, align 8, !tbaa !10
  br label %54

54:                                               ; preds = %45, %28
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %3, ptr align 8 %4, i64 16, i1 false), !tbaa.struct !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %55

55:                                               ; preds = %54, %15
  %56 = load { i64, i64 }, ptr %3, align 8
  ret { i64, i64 } %56
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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, !7, i64 0}
!6 = !{!"_ZTS4Frac", !7, i64 0, !7, i64 8}
!7 = !{!"long long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 8}
!11 = !{i64 0, i64 8, !12, i64 8, i64 8, !12}
!12 = !{!7, !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 uwtable
declare dso_local noundef i64 @_Z3gcdxx(i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local { i64, i64 } @_Zco4Frac(i64 %0, i64 %1) local_unnamed_addr #0 {
  %3 = icmp eq i64 %0, 0
  %4 = icmp eq i64 %1, 0
  %or.cond = select i1 %3, i1 %4, i1 false
  br i1 %or.cond, label %12, label %5

5:                                                ; preds = %2
  %spec.select = select i1 %3, i64 1, i64 %1
  %6 = icmp eq i64 %spec.select, 0
  %.sroa.0.0 = select i1 %6, i64 1, i64 %0
  %7 = tail call noundef i64 @_Z3gcdxx(i64 noundef %.sroa.0.0, i64 noundef %spec.select)
  %8 = sdiv i64 %.sroa.0.0, %7
  %9 = sdiv i64 %spec.select, %7
  %10 = icmp slt i64 %9, 0
  %11 = sub nsw i64 0, %8
  %.sroa.11.1 = tail call i64 @llvm.abs.i64(i64 %9, i1 true)
  %.sroa.0.1 = select i1 %10, i64 %11, i64 %8
  br label %12

12:                                               ; preds = %2, %5
  %.sroa.016.0 = phi i64 [ %.sroa.0.1, %5 ], [ 0, %2 ]
  %.sroa.3.0 = phi i64 [ %.sroa.11.1, %5 ], [ 0, %2 ]
  %.fca.0.insert = insertvalue { i64, i64 } poison, i64 %.sroa.016.0, 0
  %.fca.1.insert = insertvalue { i64, i64 } %.fca.0.insert, i64 %.sroa.3.0, 1
  ret { i64, i64 } %.fca.1.insert
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.abs.i64(i64, i1 immarg) #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 speculatable willreturn memory(none) }

!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: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass