; LLVM IR from apple/turicreate :: src/external/boost/boost_1_68_0/libs/mpi/src (computation_tree)

; 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.boost::mpi::detail::computation_tree" = type { i32, i32, i32, i32, i32 }

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZNK5boost3mpi6detail16computation_tree11level_indexEi(ptr noundef nonnull align 4 dereferenceable(20) %0, i32 noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %7 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 1, ptr %6, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %12, %2
  %9 = load i32, ptr %4, align 4, !tbaa !9
  %10 = add nsw i32 %9, -1
  store i32 %10, ptr %4, align 4, !tbaa !9
  %11 = icmp ne i32 %9, 0
  br i1 %11, label %12, label %20

12:                                               ; preds = %8
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = load i32, ptr %5, align 4, !tbaa !9
  %15 = add nsw i32 %14, %13
  store i32 %15, ptr %5, align 4, !tbaa !9
  %16 = getelementptr inbounds %"class.boost::mpi::detail::computation_tree", ptr %7, i32 0, i32 3
  %17 = load i32, ptr %16, align 4, !tbaa !11
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = mul nsw i32 %18, %17
  store i32 %19, ptr %6, align 4, !tbaa !9
  br label %8, !llvm.loop !13

20:                                               ; preds = %8
  %21 = load i32, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %21
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 12}
!12 = !{!"_ZTSN5boost3mpi6detail16computation_treeE", !10, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !10, i64 16}
!13 = distinct !{!13, !14}
!14 = !{!"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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef i32 @_ZNK5boost3mpi6detail16computation_tree11level_indexEi(ptr nocapture noundef nonnull readonly align 4 dereferenceable(20) %0, i32 noundef %1) local_unnamed_addr #0 align 2 {
  %.not7 = icmp eq i32 %1, 0
  br i1 %.not7, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %3 = getelementptr inbounds i8, ptr %0, i64 12
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %xtraiter = and i32 %1, 7
  %5 = icmp ult i32 %1, 8
  br i1 %5, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i32 %1, -8
  br label %6

6:                                                ; preds = %6, %.lr.ph.new
  %.010 = phi i32 [ 1, %.lr.ph.new ], [ %22, %6 ]
  %.059 = phi i32 [ 0, %.lr.ph.new ], [ %21, %6 ]
  %niter = phi i32 [ 0, %.lr.ph.new ], [ %niter.next.7, %6 ]
  %7 = add nsw i32 %.010, %.059
  %8 = mul nsw i32 %4, %.010
  %9 = add nsw i32 %8, %7
  %10 = mul nsw i32 %4, %8
  %11 = add nsw i32 %10, %9
  %12 = mul nsw i32 %4, %10
  %13 = add nsw i32 %12, %11
  %14 = mul nsw i32 %4, %12
  %15 = add nsw i32 %14, %13
  %16 = mul nsw i32 %4, %14
  %17 = add nsw i32 %16, %15
  %18 = mul nsw i32 %4, %16
  %19 = add nsw i32 %18, %17
  %20 = mul nsw i32 %4, %18
  %21 = add nsw i32 %20, %19
  %22 = mul nsw i32 %4, %20
  %niter.next.7 = add i32 %niter, 8
  %niter.ncmp.7 = icmp eq i32 %niter.next.7, %unroll_iter
  br i1 %niter.ncmp.7, label %._crit_edge.loopexit.unr-lcssa, label %6, !llvm.loop !10

._crit_edge.loopexit.unr-lcssa:                   ; preds = %6, %.lr.ph
  %.lcssa.ph = phi i32 [ poison, %.lr.ph ], [ %21, %6 ]
  %.010.unr = phi i32 [ 1, %.lr.ph ], [ %22, %6 ]
  %.059.unr = phi i32 [ 0, %.lr.ph ], [ %21, %6 ]
  %lcmp.mod.not = icmp eq i32 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.epil.preheader

.epil.preheader:                                  ; preds = %._crit_edge.loopexit.unr-lcssa, %.epil.preheader
  %.010.epil = phi i32 [ %24, %.epil.preheader ], [ %.010.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.059.epil = phi i32 [ %23, %.epil.preheader ], [ %.059.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i32 [ %epil.iter.next, %.epil.preheader ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %23 = add nsw i32 %.010.epil, %.059.epil
  %24 = mul nsw i32 %4, %.010.epil
  %epil.iter.next = add i32 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i32 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.epil.preheader, !llvm.loop !12

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.epil.preheader, %2
  %.05.lcssa = phi i32 [ 0, %2 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %23, %.epil.preheader ]
  ret i32 %.05.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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 12}
!6 = !{!"_ZTSN5boost3mpi6detail16computation_treeE", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12, !7, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.unroll.disable"}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass