; LLVM IR from Meow8p/nmf :: src (libnmf)

; 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.dummy_nmf_mem_chunk = type { i32, ptr }

@nmf_malloc_pool = external dso_local global ptr, align 8
@nmf_malloc_pool_position = external dso_local global i32, align 4

; 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
define dso_local void @compact_malloc(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  %4 = load i32, ptr %2, align 4, !tbaa !5
  store i32 %4, ptr %3, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %10, %1
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = load i32, ptr @nmf_malloc_pool_position, align 4, !tbaa !5
  %8 = sub i32 %7, 1
  %9 = icmp ult i32 %6, %8
  br i1 %9, label %10, label %22

10:                                               ; preds = %5
  %11 = load ptr, ptr @nmf_malloc_pool, align 8, !tbaa !9
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = zext i32 %12 to i64
  %14 = getelementptr inbounds %struct.dummy_nmf_mem_chunk, ptr %11, i64 %13
  %15 = load ptr, ptr @nmf_malloc_pool, align 8, !tbaa !9
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = add i32 %16, 1
  %18 = zext i32 %17 to i64
  %19 = getelementptr inbounds %struct.dummy_nmf_mem_chunk, ptr %15, i64 %18
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %14, ptr align 8 %19, i64 16, i1 false), !tbaa.struct !11
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = add i32 %20, 1
  store i32 %21, ptr %3, align 4, !tbaa !5
  br label %5, !llvm.loop !12

22:                                               ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret void
}

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

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 = !{!"int", !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 = !{i64 0, i64 4, !5, i64 8, i64 8, !9}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; 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"

%struct.dummy_nmf_mem_chunk = type { i32, ptr }

@nmf_malloc_pool = external dso_local local_unnamed_addr global ptr, align 8
@nmf_malloc_pool_position = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @compact_malloc(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @nmf_malloc_pool_position, align 4, !tbaa !5
  %3 = add i32 %2, -1
  %4 = icmp ugt i32 %3, %0
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %1
  %5 = zext i32 %0 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %5, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %6 = load ptr, ptr @nmf_malloc_pool, align 8, !tbaa !9
  %7 = getelementptr inbounds %struct.dummy_nmf_mem_chunk, ptr %6, i64 %indvars.iv
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %8 = getelementptr inbounds %struct.dummy_nmf_mem_chunk, ptr %6, i64 %indvars.iv.next
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %7, ptr noundef nonnull align 8 dereferenceable(16) %8, i64 16, i1 false), !tbaa.struct !11
  %9 = load i32, ptr @nmf_malloc_pool_position, align 4, !tbaa !5
  %10 = add i32 %9, -1
  %11 = zext i32 %10 to i64
  %12 = icmp ult i64 %indvars.iv.next, %11
  br i1 %12, label %.lr.ph, label %._crit_edge, !llvm.loop !12

._crit_edge:                                      ; preds = %.lr.ph, %1
  ret void
}

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

attributes #0 = { nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) 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, !6, i64 0}
!6 = !{!"int", !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 = !{i64 0, i64 4, !5, i64 8, i64 8, !9}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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