; LLVM IR from snowballstem/snowball :: compiler (space)

; 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: 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 dso_local ptr @create_s(i32 noundef) #1

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

; Function Attrs: nounwind uwtable
define dso_local ptr @add_char_to_s(ptr noundef %0, i8 noundef signext %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i8, align 1
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i8 %1, ptr %4, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %11

9:                                                ; preds = %2
  %10 = call ptr @create_s(i32 noundef 1)
  store ptr %10, ptr %3, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %9, %2
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds i32, ptr %12, i64 -1
  %14 = load i32, ptr %13, align 4, !tbaa !10
  store i32 %14, ptr %5, align 4, !tbaa !10
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %15 = load i32, ptr %5, align 4, !tbaa !10
  %16 = add nsw i32 %15, 1
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds i32, ptr %17, i64 -2
  %19 = load i32, ptr %18, align 4, !tbaa !10
  %20 = sub nsw i32 %16, %19
  store i32 %20, ptr %6, align 4, !tbaa !10
  %21 = load i32, ptr %6, align 4, !tbaa !10
  %22 = icmp sgt i32 %21, 0
  br i1 %22, label %23, label %27

23:                                               ; preds = %11
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = load i32, ptr %6, align 4, !tbaa !10
  %26 = call ptr @increase_capacity_s(ptr noundef %24, i32 noundef %25)
  store ptr %26, ptr %3, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %23, %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %28 = load i8, ptr %4, align 1, !tbaa !9
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = load i32, ptr %5, align 4, !tbaa !10
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds i8, ptr %29, i64 %31
  store i8 %28, ptr %32, align 1, !tbaa !9
  %33 = load ptr, ptr %3, align 8, !tbaa !5
  %34 = getelementptr inbounds i32, ptr %33, i64 -1
  %35 = load i32, ptr %34, align 4, !tbaa !10
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %34, align 4, !tbaa !10
  %37 = load ptr, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  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 = { 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 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"int", !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: nounwind uwtable
declare dso_local ptr @create_s(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local ptr @increase_capacity_s(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @add_char_to_s(ptr noundef %0, i8 noundef signext %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  br i1 %3, label %4, label %6

4:                                                ; preds = %2
  %5 = tail call ptr @create_s(i32 noundef 1)
  br label %6

6:                                                ; preds = %4, %2
  %.0 = phi ptr [ %5, %4 ], [ %0, %2 ]
  %7 = getelementptr inbounds i8, ptr %.0, i64 -4
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = add nsw i32 %8, 1
  %10 = getelementptr inbounds i8, ptr %.0, i64 -8
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = sub i32 %9, %11
  %13 = icmp sgt i32 %12, 0
  br i1 %13, label %14, label %16

14:                                               ; preds = %6
  %15 = tail call ptr @increase_capacity_s(ptr noundef nonnull %.0, i32 noundef %12)
  br label %16

16:                                               ; preds = %14, %6
  %.1 = phi ptr [ %15, %14 ], [ %.0, %6 ]
  %17 = sext i32 %8 to i64
  %18 = getelementptr inbounds i8, ptr %.1, i64 %17
  store i8 %1, ptr %18, align 1, !tbaa !9
  %19 = getelementptr inbounds i8, ptr %.1, i64 -4
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %19, align 4, !tbaa !5
  ret ptr %.1
}

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" }

!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/C++ TBAA"}
!9 = !{!7, !7, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,TailCallElimPass