; LLVM IR from Tinker-Twins/3D-LIDAR-Localization :: fast_gicp/thirdparty/nvbio/contrib/htslib/cram (pooled_alloc)

; 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.pool_alloc_t = type { i64, i64, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local ptr @pool_create(i64 noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %6 = call noalias ptr @malloc(i64 noundef 32) #4
  store ptr %6, ptr %4, align 8, !tbaa !9
  %7 = icmp eq ptr null, %6
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %28

9:                                                ; preds = %1
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = add i64 %10, 8
  %12 = sub i64 %11, 1
  %13 = and i64 %12, -8
  store i64 %13, ptr %3, align 8, !tbaa !5
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = icmp ult i64 %14, 8
  br i1 %15, label %16, label %17

16:                                               ; preds = %9
  store i64 8, ptr %3, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %16, %9
  %18 = load i64, ptr %3, align 8, !tbaa !5
  %19 = load ptr, ptr %4, align 8, !tbaa !9
  %20 = getelementptr inbounds %struct.pool_alloc_t, ptr %19, i32 0, i32 0
  store i64 %18, ptr %20, align 8, !tbaa !11
  %21 = load ptr, ptr %4, align 8, !tbaa !9
  %22 = getelementptr inbounds %struct.pool_alloc_t, ptr %21, i32 0, i32 1
  store i64 0, ptr %22, align 8, !tbaa !13
  %23 = load ptr, ptr %4, align 8, !tbaa !9
  %24 = getelementptr inbounds %struct.pool_alloc_t, ptr %23, i32 0, i32 2
  store ptr null, ptr %24, align 8, !tbaa !14
  %25 = load ptr, ptr %4, align 8, !tbaa !9
  %26 = getelementptr inbounds %struct.pool_alloc_t, ptr %25, i32 0, i32 3
  store ptr null, ptr %26, align 8, !tbaa !15
  %27 = load ptr, ptr %4, align 8, !tbaa !9
  store ptr %27, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %28

28:                                               ; preds = %17, %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %29 = load ptr, ptr %2, align 8
  ret ptr %29
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind allocsize(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 #3 = { nounwind }
attributes #4 = { nounwind allocsize(0) }

!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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"", !6, i64 0, !6, i64 8, !10, i64 16, !10, i64 24}
!13 = !{!12, !6, i64 8}
!14 = !{!12, !10, i64 16}
!15 = !{!12, !10, i64 24}


; 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: mustprogress nofree nounwind willreturn memory(write, argmem: none, inaccessiblemem: readwrite) uwtable
define dso_local noalias noundef ptr @pool_create(i64 noundef %0) local_unnamed_addr #0 {
  %2 = tail call noalias dereferenceable_or_null(32) ptr @malloc(i64 noundef 32) #3
  %3 = icmp eq ptr %2, null
  br i1 %3, label %9, label %4

4:                                                ; preds = %1
  %5 = add i64 %0, 7
  %6 = and i64 %5, -8
  %7 = icmp ult i64 %5, 8
  %spec.store.select = select i1 %7, i64 8, i64 %6
  store i64 %spec.store.select, ptr %2, align 8, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %2, i64 8
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(24) %8, i8 0, i64 24, i1 false)
  br label %9

9:                                                ; preds = %1, %4
  ret ptr %2
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

attributes #0 = { mustprogress nofree nounwind willreturn memory(write, argmem: none, inaccessiblemem: readwrite) 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 nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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: write) }
attributes #3 = { nounwind allocsize(0) }

!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 = !{!"", !7, i64 0, !7, i64 8, !10, i64 16, !10, i64 24}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}


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