; LLVM IR from sbu-fsl/kernel-ml :: src/autodiff (autodiff)

; 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.linear_layer_functions_struct = type { ptr, ptr }
%struct.sigmoid_layer_functions_struct = type { ptr, ptr }
%struct.layers = type { ptr, ptr }
%struct.layer = type { ptr, i32, ptr, ptr }

@linear_layer_functions = external global %struct.linear_layer_functions_struct, align 8
@sigmoid_layer_functions = external global %struct.sigmoid_layer_functions_struct, align 8

; Function Attrs: nounwind uwtable
define dso_local ptr @autodiff_forward(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store ptr null, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store ptr null, ptr %6, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.layers, ptr %7, i32 0, i32 0
  %9 = load ptr, ptr %8, align 8, !tbaa !9
  store ptr %9, ptr %5, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %33, %2
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %37

13:                                               ; preds = %10
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.layer, ptr %14, i32 0, i32 1
  %16 = load i32, ptr %15, align 8, !tbaa !11
  switch i32 %16, label %31 [
    i32 0, label %17
    i32 1, label %24
  ]

17:                                               ; preds = %13
  %18 = load ptr, ptr @linear_layer_functions, align 8, !tbaa !14
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.layer, ptr %20, i32 0, i32 0
  %22 = load ptr, ptr %21, align 8, !tbaa !16
  %23 = call ptr %18(ptr noundef %19, ptr noundef %22)
  store ptr %23, ptr %6, align 8, !tbaa !5
  br label %31

24:                                               ; preds = %13
  %25 = load ptr, ptr @sigmoid_layer_functions, align 8, !tbaa !17
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.layer, ptr %27, i32 0, i32 0
  %29 = load ptr, ptr %28, align 8, !tbaa !16
  %30 = call ptr %25(ptr noundef %26, ptr noundef %29)
  store ptr %30, ptr %6, align 8, !tbaa !5
  br label %31

31:                                               ; preds = %24, %17, %13
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %32, ptr %4, align 8, !tbaa !5
  br label %33

33:                                               ; preds = %31
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.layer, ptr %34, i32 0, i32 2
  %36 = load ptr, ptr %35, align 8, !tbaa !19
  store ptr %36, ptr %5, align 8, !tbaa !5
  br label %10, !llvm.loop !20

37:                                               ; preds = %10
  %38 = load ptr, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret ptr %38
}

; 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

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, !6, i64 0}
!10 = !{!"layers", !6, i64 0, !6, i64 8}
!11 = !{!12, !13, i64 8}
!12 = !{!"layer", !6, i64 0, !13, i64 8, !6, i64 16, !6, i64 24}
!13 = !{!"int", !7, i64 0}
!14 = !{!15, !6, i64 0}
!15 = !{!"linear_layer_functions_struct", !6, i64 0, !6, i64 8}
!16 = !{!12, !6, i64 0}
!17 = !{!18, !6, i64 0}
!18 = !{!"sigmoid_layer_functions_struct", !6, i64 0, !6, i64 8}
!19 = !{!12, !6, i64 16}
!20 = distinct !{!20, !21}
!21 = !{!"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.linear_layer_functions_struct = type { ptr, ptr }
%struct.sigmoid_layer_functions_struct = type { ptr, ptr }

@linear_layer_functions = external local_unnamed_addr global %struct.linear_layer_functions_struct, align 8
@sigmoid_layer_functions = external local_unnamed_addr global %struct.sigmoid_layer_functions_struct, align 8

; Function Attrs: nounwind uwtable
define dso_local ptr @autodiff_forward(ptr nocapture noundef readonly %0, ptr noundef %1) local_unnamed_addr #0 {
  %.01012 = load ptr, ptr %0, align 8, !tbaa !5
  %.not13 = icmp eq ptr %.01012, null
  br i1 %.not13, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %9
  %.01016 = phi ptr [ %.010, %9 ], [ %.01012, %2 ]
  %.015 = phi ptr [ %.1, %9 ], [ null, %2 ]
  %.01114 = phi ptr [ %.1, %9 ], [ %1, %2 ]
  %3 = getelementptr inbounds i8, ptr %.01016, i64 8
  %4 = load i32, ptr %3, align 8, !tbaa !9
  switch i32 %4, label %9 [
    i32 0, label %.sink.split
    i32 1, label %5
  ]

5:                                                ; preds = %.lr.ph
  br label %.sink.split

.sink.split:                                      ; preds = %.lr.ph, %5
  %sigmoid_layer_functions.sink = phi ptr [ @sigmoid_layer_functions, %5 ], [ @linear_layer_functions, %.lr.ph ]
  %6 = load ptr, ptr %sigmoid_layer_functions.sink, align 8, !tbaa !5
  %7 = load ptr, ptr %.01016, align 8, !tbaa !12
  %8 = tail call ptr %6(ptr noundef %.01114, ptr noundef %7) #1
  br label %9

9:                                                ; preds = %.sink.split, %.lr.ph
  %.1 = phi ptr [ %.015, %.lr.ph ], [ %8, %.sink.split ]
  %10 = getelementptr inbounds i8, ptr %.01016, i64 16
  %.010 = load ptr, ptr %10, align 8, !tbaa !5
  %.not = icmp eq ptr %.010, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %9, %2
  %.0.lcssa = phi ptr [ null, %2 ], [ %.1, %9 ]
  ret ptr %.0.lcssa
}

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 = { 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, !11, i64 8}
!10 = !{!"layer", !6, i64 0, !11, i64 8, !6, i64 16, !6, i64 24}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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