; LLVM IR from tangjz/acm-icpc :: 51nod/1442.ll (Z7addEdgeiii)

; 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.Edge = type { i32, i32, i32 }

@M = external dso_local global i32, align 4
@lnk = external dso_local global [210 x i32], align 16
@e = external dso_local global [1420 x %struct.Edge], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z7addEdgeiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca %struct.Edge, align 4
  %8 = alloca %struct.Edge, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = icmp ne i32 %9, 0
  br i1 %10, label %12, label %11

11:                                               ; preds = %3
  br label %46

12:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 12, ptr %7) #3
  %13 = getelementptr inbounds %struct.Edge, ptr %7, i32 0, i32 0
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [210 x i32], ptr @lnk, i64 0, i64 %15
  %17 = load i32, ptr %16, align 4, !tbaa !5
  store i32 %17, ptr %13, align 4, !tbaa !9
  %18 = getelementptr inbounds %struct.Edge, ptr %7, i32 0, i32 1
  %19 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %19, ptr %18, align 4, !tbaa !11
  %20 = getelementptr inbounds %struct.Edge, ptr %7, i32 0, i32 2
  %21 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %21, ptr %20, align 4, !tbaa !12
  %22 = load i32, ptr @M, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [1420 x %struct.Edge], ptr @e, i64 0, i64 %23
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %24, ptr align 4 %7, i64 12, i1 false), !tbaa.struct !13
  call void @llvm.lifetime.end.p0(i64 12, ptr %7) #3
  %25 = load i32, ptr @M, align 4, !tbaa !5
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr @M, align 4, !tbaa !5
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [210 x i32], ptr @lnk, i64 0, i64 %28
  store i32 %25, ptr %29, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 12, ptr %8) #3
  %30 = getelementptr inbounds %struct.Edge, ptr %8, i32 0, i32 0
  %31 = load i32, ptr %5, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [210 x i32], ptr @lnk, i64 0, i64 %32
  %34 = load i32, ptr %33, align 4, !tbaa !5
  store i32 %34, ptr %30, align 4, !tbaa !9
  %35 = getelementptr inbounds %struct.Edge, ptr %8, i32 0, i32 1
  %36 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %36, ptr %35, align 4, !tbaa !11
  %37 = getelementptr inbounds %struct.Edge, ptr %8, i32 0, i32 2
  store i32 0, ptr %37, align 4, !tbaa !12
  %38 = load i32, ptr @M, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [1420 x %struct.Edge], ptr @e, i64 0, i64 %39
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %40, ptr align 4 %8, i64 12, i1 false), !tbaa.struct !13
  call void @llvm.lifetime.end.p0(i64 12, ptr %8) #3
  %41 = load i32, ptr @M, align 4, !tbaa !5
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr @M, align 4, !tbaa !5
  %43 = load i32, ptr %5, align 4, !tbaa !5
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds [210 x i32], ptr @lnk, i64 0, i64 %44
  store i32 %41, ptr %45, align 4, !tbaa !5
  br label %46

46:                                               ; preds = %12, %11
  ret void
}

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

; 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 = { 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTS4Edge", !6, i64 0, !6, i64 4, !6, i64 8}
!11 = !{!10, !6, i64 4}
!12 = !{!10, !6, i64 8}
!13 = !{i64 0, i64 4, !5, i64 4, i64 4, !5, i64 8, i64 4, !5}


; 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"

%struct.Edge = type { i32, i32, i32 }

@M = external dso_local local_unnamed_addr global i32, align 4
@lnk = external dso_local local_unnamed_addr global [210 x i32], align 16
@e = external dso_local local_unnamed_addr global [1420 x %struct.Edge], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z7addEdgeiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not = icmp eq i32 %2, 0
  br i1 %.not, label %18, label %4

4:                                                ; preds = %3
  %5 = sext i32 %0 to i64
  %6 = getelementptr inbounds [210 x i32], ptr @lnk, i64 0, i64 %5
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = load i32, ptr @M, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [1420 x %struct.Edge], ptr @e, i64 0, i64 %9
  store i32 %7, ptr %10, align 4, !tbaa !5
  %.sroa.42.0..sroa_idx = getelementptr inbounds i8, ptr %10, i64 4
  store i32 %1, ptr %.sroa.42.0..sroa_idx, align 4, !tbaa !5
  %.sroa.53.0..sroa_idx = getelementptr inbounds i8, ptr %10, i64 8
  store i32 %2, ptr %.sroa.53.0..sroa_idx, align 4, !tbaa !5
  %11 = add nsw i32 %8, 1
  store i32 %8, ptr %6, align 4, !tbaa !5
  %12 = sext i32 %1 to i64
  %13 = getelementptr inbounds [210 x i32], ptr @lnk, i64 0, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = sext i32 %11 to i64
  %16 = getelementptr inbounds [1420 x %struct.Edge], ptr @e, i64 0, i64 %15
  store i32 %14, ptr %16, align 4, !tbaa !5
  %.sroa.4.0..sroa_idx = getelementptr inbounds i8, ptr %16, i64 4
  store i32 %0, ptr %.sroa.4.0..sroa_idx, align 4, !tbaa !5
  %.sroa.5.0..sroa_idx = getelementptr inbounds i8, ptr %16, i64 8
  store i32 0, ptr %.sroa.5.0..sroa_idx, align 4, !tbaa !5
  %17 = add nsw i32 %8, 2
  store i32 %17, ptr @M, align 4, !tbaa !5
  store i32 %11, ptr %13, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %3, %4
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: 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 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: DSEPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass