; LLVM IR from tangjz/acm-icpc :: self_training/2015-02-22/O.ll (Z7addedgeii)

; 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 }

@tot = external dso_local global i32, align 4
@pre = external dso_local global [402 x [2 x i32]], align 16
@e = external dso_local global [80008 x %struct.Edge], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z7addedgeii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca %struct.Edge, align 4
  %6 = alloca %struct.Edge, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %7 = getelementptr inbounds %struct.Edge, ptr %5, i32 0, i32 0
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [402 x [2 x i32]], ptr @pre, i64 0, i64 %9
  %11 = getelementptr inbounds [2 x i32], ptr %10, i64 0, i64 0
  %12 = load i32, ptr %11, align 8, !tbaa !5
  store i32 %12, ptr %7, align 4, !tbaa !9
  %13 = getelementptr inbounds %struct.Edge, ptr %5, i32 0, i32 1
  %14 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %14, ptr %13, align 4, !tbaa !11
  %15 = load i32, ptr @tot, align 4, !tbaa !5
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr @tot, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [80008 x %struct.Edge], ptr @e, i64 0, i64 %17
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %18, ptr align 4 %5, i64 8, i1 false), !tbaa.struct !12
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  %19 = load i32, ptr @tot, align 4, !tbaa !5
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [402 x [2 x i32]], ptr @pre, i64 0, i64 %21
  %23 = getelementptr inbounds [2 x i32], ptr %22, i64 0, i64 0
  store i32 %19, ptr %23, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %24 = getelementptr inbounds %struct.Edge, ptr %6, i32 0, i32 0
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [402 x [2 x i32]], ptr @pre, i64 0, i64 %26
  %28 = getelementptr inbounds [2 x i32], ptr %27, i64 0, i64 1
  %29 = load i32, ptr %28, align 4, !tbaa !5
  store i32 %29, ptr %24, align 4, !tbaa !9
  %30 = getelementptr inbounds %struct.Edge, ptr %6, i32 0, i32 1
  %31 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %31, ptr %30, align 4, !tbaa !11
  %32 = load i32, ptr @tot, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr @tot, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds [80008 x %struct.Edge], ptr @e, i64 0, i64 %34
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %35, ptr align 4 %6, i64 8, i1 false), !tbaa.struct !12
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %36 = load i32, ptr @tot, align 4, !tbaa !5
  %37 = load i32, ptr %4, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [402 x [2 x i32]], ptr @pre, i64 0, i64 %38
  %40 = getelementptr inbounds [2 x i32], ptr %39, i64 0, i64 1
  store i32 %36, ptr %40, align 4, !tbaa !5
  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}
!11 = !{!10, !6, i64 4}
!12 = !{i64 0, i64 4, !5, i64 4, 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 }

@tot = external dso_local local_unnamed_addr global i32, align 4
@pre = external dso_local local_unnamed_addr global [402 x [2 x i32]], align 16
@e = external dso_local local_unnamed_addr global [80008 x %struct.Edge], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z7addedgeii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = sext i32 %0 to i64
  %4 = getelementptr inbounds [402 x [2 x i32]], ptr @pre, i64 0, i64 %3
  %5 = load i32, ptr %4, align 8, !tbaa !5
  %6 = load i32, ptr @tot, align 4, !tbaa !5
  %7 = add nsw i32 %6, 1
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [80008 x %struct.Edge], ptr @e, i64 0, i64 %8
  store i32 %5, ptr %9, align 8, !tbaa !5
  %.sroa.42.0..sroa_idx = getelementptr inbounds i8, ptr %9, i64 4
  store i32 %1, ptr %.sroa.42.0..sroa_idx, align 4, !tbaa !5
  store i32 %7, ptr %4, align 8, !tbaa !5
  %10 = sext i32 %1 to i64
  %11 = getelementptr inbounds [402 x [2 x i32]], ptr @pre, i64 0, i64 %10, i64 1
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = add nsw i32 %6, 2
  store i32 %13, ptr @tot, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [80008 x %struct.Edge], ptr @e, i64 0, i64 %14
  store i32 %12, ptr %15, align 8, !tbaa !5
  %.sroa.4.0..sroa_idx = getelementptr inbounds i8, ptr %15, i64 4
  store i32 %0, ptr %.sroa.4.0..sroa_idx, align 4, !tbaa !5
  store i32 %13, ptr %11, align 4, !tbaa !5
  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