; LLVM IR from boschglobal/dse.network :: dse/network/examples/stub (stub)

; 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.stub_function_example_t = type { i8, i8, i8, i8 }

; 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: inlinehint nounwind uwtable
declare hidden zeroext i8 @pack_left_shift_u8(i8 noundef zeroext, i8 noundef zeroext, i8 noundef zeroext) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @stub_function_example_pack(ptr noundef %0, ptr noundef %1, i64 noundef %2) #2 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !9
  %8 = load i64, ptr %7, align 8, !tbaa !9
  %9 = icmp ult i64 %8, 8
  br i1 %9, label %10, label %11

10:                                               ; preds = %3
  store i32 -22, ptr %4, align 4
  br label %58

11:                                               ; preds = %3
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %12, i64 0
  call void @llvm.memset.p0.i64(ptr align 1 %13, i8 0, i64 8, i1 false)
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.stub_function_example_t, ptr %14, i32 0, i32 0
  %16 = load i8, ptr %15, align 1, !tbaa !11
  %17 = call zeroext i8 @pack_left_shift_u8(i8 noundef zeroext %16, i8 noundef zeroext 0, i8 noundef zeroext -1)
  %18 = zext i8 %17 to i32
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds i8, ptr %19, i64 0
  %21 = load i8, ptr %20, align 1, !tbaa !13
  %22 = zext i8 %21 to i32
  %23 = or i32 %22, %18
  %24 = trunc i32 %23 to i8
  store i8 %24, ptr %20, align 1, !tbaa !13
  %25 = load ptr, ptr %6, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.stub_function_example_t, ptr %25, i32 0, i32 1
  %27 = load i8, ptr %26, align 1, !tbaa !14
  %28 = call zeroext i8 @pack_left_shift_u8(i8 noundef zeroext %27, i8 noundef zeroext 0, i8 noundef zeroext -1)
  %29 = zext i8 %28 to i32
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = getelementptr inbounds i8, ptr %30, i64 1
  %32 = load i8, ptr %31, align 1, !tbaa !13
  %33 = zext i8 %32 to i32
  %34 = or i32 %33, %29
  %35 = trunc i32 %34 to i8
  store i8 %35, ptr %31, align 1, !tbaa !13
  %36 = load ptr, ptr %6, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.stub_function_example_t, ptr %36, i32 0, i32 2
  %38 = load i8, ptr %37, align 1, !tbaa !15
  %39 = call zeroext i8 @pack_left_shift_u8(i8 noundef zeroext %38, i8 noundef zeroext 0, i8 noundef zeroext -1)
  %40 = zext i8 %39 to i32
  %41 = load ptr, ptr %5, align 8, !tbaa !5
  %42 = getelementptr inbounds i8, ptr %41, i64 2
  %43 = load i8, ptr %42, align 1, !tbaa !13
  %44 = zext i8 %43 to i32
  %45 = or i32 %44, %40
  %46 = trunc i32 %45 to i8
  store i8 %46, ptr %42, align 1, !tbaa !13
  %47 = load ptr, ptr %6, align 8, !tbaa !5
  %48 = getelementptr inbounds %struct.stub_function_example_t, ptr %47, i32 0, i32 3
  %49 = load i8, ptr %48, align 1, !tbaa !16
  %50 = call zeroext i8 @pack_left_shift_u8(i8 noundef zeroext %49, i8 noundef zeroext 0, i8 noundef zeroext -1)
  %51 = zext i8 %50 to i32
  %52 = load ptr, ptr %5, align 8, !tbaa !5
  %53 = getelementptr inbounds i8, ptr %52, i64 3
  %54 = load i8, ptr %53, align 1, !tbaa !13
  %55 = zext i8 %54 to i32
  %56 = or i32 %55, %51
  %57 = trunc i32 %56 to i8
  store i8 %57, ptr %53, align 1, !tbaa !13
  store i32 8, ptr %4, align 4
  br label %58

58:                                               ; preds = %11, %10
  %59 = load i32, ptr %4, align 4
  ret i32 %59
}

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #1 = { inlinehint 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 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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !7, i64 0}
!12 = !{!"stub_function_example_t", !7, i64 0, !7, i64 1, !7, i64 2, !7, i64 3}
!13 = !{!7, !7, i64 0}
!14 = !{!12, !7, i64 1}
!15 = !{!12, !7, i64 2}
!16 = !{!12, !7, i64 3}


; 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: inlinehint nounwind uwtable
declare hidden zeroext i8 @pack_left_shift_u8(i8 noundef zeroext, i8 noundef zeroext, i8 noundef zeroext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local range(i32 -22, 9) i32 @stub_function_example_pack(ptr nocapture noundef %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #1 {
  %4 = icmp ult i64 %2, 8
  br i1 %4, label %28, label %5

5:                                                ; preds = %3
  store i64 0, ptr %0, align 1
  %6 = load i8, ptr %1, align 1, !tbaa !5
  %7 = tail call zeroext i8 @pack_left_shift_u8(i8 noundef zeroext %6, i8 noundef zeroext 0, i8 noundef zeroext -1)
  %8 = load i8, ptr %0, align 1, !tbaa !9
  %9 = or i8 %8, %7
  store i8 %9, ptr %0, align 1, !tbaa !9
  %10 = getelementptr inbounds i8, ptr %1, i64 1
  %11 = load i8, ptr %10, align 1, !tbaa !10
  %12 = tail call zeroext i8 @pack_left_shift_u8(i8 noundef zeroext %11, i8 noundef zeroext 0, i8 noundef zeroext -1)
  %13 = getelementptr inbounds i8, ptr %0, i64 1
  %14 = load i8, ptr %13, align 1, !tbaa !9
  %15 = or i8 %14, %12
  store i8 %15, ptr %13, align 1, !tbaa !9
  %16 = getelementptr inbounds i8, ptr %1, i64 2
  %17 = load i8, ptr %16, align 1, !tbaa !11
  %18 = tail call zeroext i8 @pack_left_shift_u8(i8 noundef zeroext %17, i8 noundef zeroext 0, i8 noundef zeroext -1)
  %19 = getelementptr inbounds i8, ptr %0, i64 2
  %20 = load i8, ptr %19, align 1, !tbaa !9
  %21 = or i8 %20, %18
  store i8 %21, ptr %19, align 1, !tbaa !9
  %22 = getelementptr inbounds i8, ptr %1, i64 3
  %23 = load i8, ptr %22, align 1, !tbaa !12
  %24 = tail call zeroext i8 @pack_left_shift_u8(i8 noundef zeroext %23, i8 noundef zeroext 0, i8 noundef zeroext -1)
  %25 = getelementptr inbounds i8, ptr %0, i64 3
  %26 = load i8, ptr %25, align 1, !tbaa !9
  %27 = or i8 %26, %24
  store i8 %27, ptr %25, align 1, !tbaa !9
  br label %28

28:                                               ; preds = %3, %5
  %.0 = phi i32 [ 8, %5 ], [ -22, %3 ]
  ret i32 %.0
}

attributes #0 = { inlinehint 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 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 0}
!6 = !{!"stub_function_example_t", !7, i64 0, !7, i64 1, !7, i64 2, !7, i64 3}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = !{!6, !7, i64 1}
!11 = !{!6, !7, i64 2}
!12 = !{!6, !7, i64 3}


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