; LLVM IR from aagdev/mlimgsynth :: src/ccommon (alloc_arena)

; 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.AllocatorArena = type { i64, ptr, ptr }
%struct.AllocArenaPage = type { ptr, i64, [0 x i8] }

; Function Attrs: nounwind uwtable
declare dso_local i32 @alloc_arena_reserve(ptr 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: nounwind uwtable
define dso_local ptr @alloc_arena_alloc(ptr noundef %0, i64 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  %7 = load i64, ptr %5, align 8, !tbaa !9
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.AllocatorArena, ptr %8, i32 0, i32 0
  %10 = load i64, ptr %9, align 8, !tbaa !11
  %11 = icmp ugt i64 %7, %10
  br i1 %11, label %12, label %18

12:                                               ; preds = %2
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = load i64, ptr %5, align 8, !tbaa !9
  %15 = call i32 @alloc_arena_reserve(ptr noundef %13, i64 noundef %14)
  %16 = icmp slt i32 %15, 0
  br i1 %16, label %17, label %18

17:                                               ; preds = %12
  store ptr null, ptr %3, align 8
  br label %41

18:                                               ; preds = %12, %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.AllocatorArena, ptr %19, i32 0, i32 2
  %21 = load ptr, ptr %20, align 8, !tbaa !13
  %22 = getelementptr inbounds %struct.AllocArenaPage, ptr %21, i32 0, i32 2
  %23 = getelementptr inbounds [0 x i8], ptr %22, i64 0, i64 0
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.AllocatorArena, ptr %24, i32 0, i32 2
  %26 = load ptr, ptr %25, align 8, !tbaa !13
  %27 = getelementptr inbounds %struct.AllocArenaPage, ptr %26, i32 0, i32 1
  %28 = load i64, ptr %27, align 8, !tbaa !9
  %29 = getelementptr inbounds i8, ptr %23, i64 %28
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.AllocatorArena, ptr %30, i32 0, i32 0
  %32 = load i64, ptr %31, align 8, !tbaa !11
  %33 = sub i64 0, %32
  %34 = getelementptr inbounds i8, ptr %29, i64 %33
  store ptr %34, ptr %6, align 8, !tbaa !5
  %35 = load i64, ptr %5, align 8, !tbaa !9
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.AllocatorArena, ptr %36, i32 0, i32 0
  %38 = load i64, ptr %37, align 8, !tbaa !11
  %39 = sub i64 %38, %35
  store i64 %39, ptr %37, align 8, !tbaa !11
  %40 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %40, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  br label %41

41:                                               ; preds = %18, %17
  %42 = load ptr, ptr %3, align 8
  ret ptr %42
}

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"AllocatorArena", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!12, !6, i64 16}


; 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 i32 @alloc_arena_reserve(ptr noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @alloc_arena_alloc(ptr noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = load i64, ptr %0, align 8, !tbaa !5
  %4 = icmp ult i64 %3, %1
  br i1 %4, label %5, label %8

5:                                                ; preds = %2
  %6 = tail call i32 @alloc_arena_reserve(ptr noundef nonnull %0, i64 noundef %1)
  %7 = icmp slt i32 %6, 0
  br i1 %7, label %19, label %._crit_edge

._crit_edge:                                      ; preds = %5
  %.pre = load i64, ptr %0, align 8, !tbaa !5
  br label %8

8:                                                ; preds = %._crit_edge, %2
  %9 = phi i64 [ %.pre, %._crit_edge ], [ %3, %2 ]
  %10 = getelementptr inbounds i8, ptr %0, i64 16
  %11 = load ptr, ptr %10, align 8, !tbaa !11
  %12 = getelementptr inbounds i8, ptr %11, i64 16
  %13 = getelementptr inbounds i8, ptr %11, i64 8
  %14 = load i64, ptr %13, align 8, !tbaa !12
  %15 = getelementptr inbounds i8, ptr %12, i64 %14
  %16 = sub i64 0, %9
  %17 = getelementptr inbounds i8, ptr %15, i64 %16
  %18 = sub i64 %9, %1
  store i64 %18, ptr %0, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %5, %8
  %.0 = phi ptr [ %17, %8 ], [ null, %5 ]
  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" }

!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 = !{!"AllocatorArena", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 16}
!12 = !{!7, !7, i64 0}


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