; LLVM IR from snowballstem/snowball :: runtime (utilities)

; 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.SN_env = type { ptr, i32, i32, i32, i32, i32, ptr, ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare hidden ptr @increase_size(ptr noundef, i32 noundef) #1

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

; Function Attrs: nounwind uwtable
define dso_local ptr @assign_to(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.SN_env, ptr %8, i32 0, i32 2
  %10 = load i32, ptr %9, align 4, !tbaa !9
  store i32 %10, ptr %6, align 4, !tbaa !12
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = getelementptr inbounds i32, ptr %11, i64 -2
  %13 = load i32, ptr %12, align 4, !tbaa !12
  %14 = load i32, ptr %6, align 4, !tbaa !12
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %16, label %24

16:                                               ; preds = %2
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load i32, ptr %6, align 4, !tbaa !12
  %19 = call ptr @increase_size(ptr noundef %17, i32 noundef %18)
  store ptr %19, ptr %5, align 8, !tbaa !5
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = icmp eq ptr %20, null
  br i1 %21, label %22, label %23

22:                                               ; preds = %16
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %36

23:                                               ; preds = %16
  br label %24

24:                                               ; preds = %23, %2
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.SN_env, ptr %26, i32 0, i32 0
  %28 = load ptr, ptr %27, align 8, !tbaa !13
  %29 = load i32, ptr %6, align 4, !tbaa !12
  %30 = sext i32 %29 to i64
  %31 = mul i64 %30, 1
  call void @llvm.memmove.p0.p0.i64(ptr align 1 %25, ptr align 1 %28, i64 %31, i1 false)
  %32 = load i32, ptr %6, align 4, !tbaa !12
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = getelementptr inbounds i32, ptr %33, i64 -1
  store i32 %32, ptr %34, align 4, !tbaa !12
  %35 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %35, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %36

36:                                               ; preds = %24, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %37 = load ptr, ptr %3, align 8
  ret ptr %37
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 12}
!10 = !{!"SN_env", !6, i64 0, !11, i64 8, !11, i64 12, !11, i64 16, !11, i64 20, !11, i64 24, !6, i64 32, !6, i64 40}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !6, 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: nounwind uwtable
declare hidden ptr @increase_size(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memmove.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @assign_to(ptr nocapture noundef readonly %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 12
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %1, i64 -8
  %6 = load i32, ptr %5, align 4, !tbaa !11
  %7 = icmp slt i32 %6, %4
  br i1 %7, label %8, label %11

8:                                                ; preds = %2
  %9 = tail call ptr @increase_size(ptr noundef nonnull %1, i32 noundef %4)
  %10 = icmp eq ptr %9, null
  br i1 %10, label %15, label %11

11:                                               ; preds = %8, %2
  %.012 = phi ptr [ %9, %8 ], [ %1, %2 ]
  %12 = load ptr, ptr %0, align 8, !tbaa !12
  %13 = sext i32 %4 to i64
  tail call void @llvm.memmove.p0.p0.i64(ptr nonnull align 1 %.012, ptr align 1 %12, i64 %13, i1 false)
  %14 = getelementptr inbounds i8, ptr %.012, i64 -4
  store i32 %4, ptr %14, align 4, !tbaa !11
  br label %15

15:                                               ; preds = %8, %11
  %.0 = phi ptr [ %.012, %11 ], [ null, %8 ]
  ret ptr %.0
}

attributes #0 = { 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }

!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, !10, i64 12}
!6 = !{!"SN_env", !7, i64 0, !10, i64 8, !10, i64 12, !10, i64 16, !10, i64 20, !10, i64 24, !7, i64 32, !7, i64 40}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!10, !10, i64 0}
!12 = !{!6, !7, i64 0}


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