; LLVM IR from Sopiro/Muli :: src/util/block_allocator.ll (ZN4muli14BlockAllocator5ClearEv)

; 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"

%"class.muli::BlockAllocator" = type { %"class.muli::Allocator", i32, i32, [128 x i32], ptr, [128 x ptr] }
%"class.muli::Allocator" = type { ptr }
%"struct.muli::Chunk" = type { i32, i32, ptr, ptr }

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #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: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN4muli4FreeEPv(ptr noundef) #2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN4muli14BlockAllocator5ClearEv(ptr noundef nonnull align 8 dereferenceable(1560) %0) unnamed_addr #3 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %6 = getelementptr inbounds %"class.muli::BlockAllocator", ptr %5, i32 0, i32 4
  %7 = load ptr, ptr %6, align 8, !tbaa !9
  store ptr %7, ptr %3, align 8, !tbaa !5
  br label %8

8:                                                ; preds = %11, %1
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %11, label %20

11:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %12, ptr %4, align 8, !tbaa !5
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = getelementptr inbounds %"struct.muli::Chunk", ptr %13, i32 0, i32 3
  %15 = load ptr, ptr %14, align 8, !tbaa !13
  store ptr %15, ptr %3, align 8, !tbaa !5
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %"struct.muli::Chunk", ptr %16, i32 0, i32 2
  %18 = load ptr, ptr %17, align 8, !tbaa !15
  call void @_ZN4muli4FreeEPv(ptr noundef %18)
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  call void @_ZN4muli4FreeEPv(ptr noundef %19)
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  br label %8, !llvm.loop !16

20:                                               ; preds = %8
  %21 = getelementptr inbounds %"class.muli::BlockAllocator", ptr %5, i32 0, i32 1
  store i32 0, ptr %21, align 8, !tbaa !18
  %22 = getelementptr inbounds %"class.muli::BlockAllocator", ptr %5, i32 0, i32 2
  store i32 0, ptr %22, align 4, !tbaa !19
  %23 = getelementptr inbounds %"class.muli::BlockAllocator", ptr %5, i32 0, i32 4
  store ptr null, ptr %23, align 8, !tbaa !9
  %24 = getelementptr inbounds %"class.muli::BlockAllocator", ptr %5, i32 0, i32 5
  %25 = getelementptr inbounds [128 x ptr], ptr %24, i64 0, i64 0
  call void @llvm.memset.p0.i64(ptr align 8 %25, i8 0, i64 1024, i1 false)
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  ret void
}

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 #3 = { mustprogress 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 #4 = { 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++ TBAA"}
!9 = !{!10, !6, i64 528}
!10 = !{!"_ZTSN4muli14BlockAllocatorE", !11, i64 0, !12, i64 8, !12, i64 12, !7, i64 16, !6, i64 528, !7, i64 536}
!11 = !{!"_ZTSN4muli9AllocatorE"}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !6, i64 16}
!14 = !{!"_ZTSN4muli5ChunkE", !12, i64 0, !12, i64 4, !6, i64 8, !6, i64 16}
!15 = !{!14, !6, i64 8}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}
!18 = !{!10, !12, i64 8}
!19 = !{!10, !12, i64 12}


; 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 nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN4muli4FreeEPv(ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN4muli14BlockAllocator5ClearEv(ptr nocapture noundef nonnull align 8 dereferenceable(1560) %0) unnamed_addr #2 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 528
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %.not6 = icmp eq ptr %3, null
  br i1 %.not6, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.07 = phi ptr [ %5, %.lr.ph ], [ %3, %1 ]
  %4 = getelementptr inbounds i8, ptr %.07, i64 16
  %5 = load ptr, ptr %4, align 8, !tbaa !12
  %6 = getelementptr inbounds i8, ptr %.07, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !14
  tail call void @_ZN4muli4FreeEPv(ptr noundef %7)
  tail call void @_ZN4muli4FreeEPv(ptr noundef nonnull %.07)
  %.not = icmp eq ptr %5, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !15

._crit_edge:                                      ; preds = %.lr.ph, %1
  %8 = getelementptr inbounds i8, ptr %0, i64 8
  store i32 0, ptr %8, align 8, !tbaa !17
  %9 = getelementptr inbounds i8, ptr %0, i64 12
  store i32 0, ptr %9, align 4, !tbaa !18
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(1032) %2, i8 0, i64 1032, i1 false)
  ret void
}

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #1 = { inlinehint 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 #2 = { 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" }

!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, !11, i64 528}
!6 = !{!"_ZTSN4muli14BlockAllocatorE", !7, i64 0, !8, i64 8, !8, i64 12, !9, i64 16, !11, i64 528, !9, i64 536}
!7 = !{!"_ZTSN4muli9AllocatorE"}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = !{!"any pointer", !9, i64 0}
!12 = !{!13, !11, i64 16}
!13 = !{!"_ZTSN4muli5ChunkE", !8, i64 0, !8, i64 4, !11, i64 8, !11, i64 16}
!14 = !{!13, !11, i64 8}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}
!17 = !{!6, !8, i64 8}
!18 = !{!6, !8, i64 12}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,MemCpyOptPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass