; LLVM IR from introlab/odas :: src/signal (scan)

; 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.scans_obj = type { i32, ptr, ptr, ptr, ptr, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local ptr @scans_construct_null(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %4 = call noalias ptr @malloc(i64 noundef 56) #5
  store ptr %4, ptr %3, align 8, !tbaa !9
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = load ptr, ptr %3, align 8, !tbaa !9
  %7 = getelementptr inbounds %struct.scans_obj, ptr %6, i32 0, i32 0
  store i32 %5, ptr %7, align 8, !tbaa !11
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = zext i32 %8 to i64
  %10 = mul i64 8, %9
  %11 = call noalias ptr @malloc(i64 noundef %10) #5
  %12 = load ptr, ptr %3, align 8, !tbaa !9
  %13 = getelementptr inbounds %struct.scans_obj, ptr %12, i32 0, i32 1
  store ptr %11, ptr %13, align 8, !tbaa !13
  %14 = load ptr, ptr %3, align 8, !tbaa !9
  %15 = getelementptr inbounds %struct.scans_obj, ptr %14, i32 0, i32 1
  %16 = load ptr, ptr %15, align 8, !tbaa !13
  %17 = load i32, ptr %2, align 4, !tbaa !5
  %18 = zext i32 %17 to i64
  %19 = mul i64 8, %18
  call void @llvm.memset.p0.i64(ptr align 8 %16, i8 0, i64 %19, i1 false)
  %20 = load i32, ptr %2, align 4, !tbaa !5
  %21 = zext i32 %20 to i64
  %22 = mul i64 8, %21
  %23 = call noalias ptr @malloc(i64 noundef %22) #5
  %24 = load ptr, ptr %3, align 8, !tbaa !9
  %25 = getelementptr inbounds %struct.scans_obj, ptr %24, i32 0, i32 2
  store ptr %23, ptr %25, align 8, !tbaa !14
  %26 = load ptr, ptr %3, align 8, !tbaa !9
  %27 = getelementptr inbounds %struct.scans_obj, ptr %26, i32 0, i32 2
  %28 = load ptr, ptr %27, align 8, !tbaa !14
  %29 = load i32, ptr %2, align 4, !tbaa !5
  %30 = zext i32 %29 to i64
  %31 = mul i64 8, %30
  call void @llvm.memset.p0.i64(ptr align 8 %28, i8 0, i64 %31, i1 false)
  %32 = load i32, ptr %2, align 4, !tbaa !5
  %33 = zext i32 %32 to i64
  %34 = mul i64 8, %33
  %35 = call noalias ptr @malloc(i64 noundef %34) #5
  %36 = load ptr, ptr %3, align 8, !tbaa !9
  %37 = getelementptr inbounds %struct.scans_obj, ptr %36, i32 0, i32 3
  store ptr %35, ptr %37, align 8, !tbaa !15
  %38 = load ptr, ptr %3, align 8, !tbaa !9
  %39 = getelementptr inbounds %struct.scans_obj, ptr %38, i32 0, i32 3
  %40 = load ptr, ptr %39, align 8, !tbaa !15
  %41 = load i32, ptr %2, align 4, !tbaa !5
  %42 = zext i32 %41 to i64
  %43 = mul i64 8, %42
  call void @llvm.memset.p0.i64(ptr align 8 %40, i8 0, i64 %43, i1 false)
  %44 = load i32, ptr %2, align 4, !tbaa !5
  %45 = zext i32 %44 to i64
  %46 = mul i64 8, %45
  %47 = call noalias ptr @malloc(i64 noundef %46) #5
  %48 = load ptr, ptr %3, align 8, !tbaa !9
  %49 = getelementptr inbounds %struct.scans_obj, ptr %48, i32 0, i32 4
  store ptr %47, ptr %49, align 8, !tbaa !16
  %50 = load ptr, ptr %3, align 8, !tbaa !9
  %51 = getelementptr inbounds %struct.scans_obj, ptr %50, i32 0, i32 4
  %52 = load ptr, ptr %51, align 8, !tbaa !16
  %53 = load i32, ptr %2, align 4, !tbaa !5
  %54 = zext i32 %53 to i64
  %55 = mul i64 8, %54
  call void @llvm.memset.p0.i64(ptr align 8 %52, i8 0, i64 %55, i1 false)
  %56 = load ptr, ptr %3, align 8, !tbaa !9
  %57 = getelementptr inbounds %struct.scans_obj, ptr %56, i32 0, i32 5
  store ptr null, ptr %57, align 8, !tbaa !17
  %58 = load i32, ptr %2, align 4, !tbaa !5
  %59 = zext i32 %58 to i64
  %60 = mul i64 8, %59
  %61 = call noalias ptr @malloc(i64 noundef %60) #5
  %62 = load ptr, ptr %3, align 8, !tbaa !9
  %63 = getelementptr inbounds %struct.scans_obj, ptr %62, i32 0, i32 6
  store ptr %61, ptr %63, align 8, !tbaa !18
  %64 = load ptr, ptr %3, align 8, !tbaa !9
  %65 = getelementptr inbounds %struct.scans_obj, ptr %64, i32 0, i32 6
  %66 = load ptr, ptr %65, align 8, !tbaa !18
  %67 = load i32, ptr %2, align 4, !tbaa !5
  %68 = zext i32 %67 to i64
  %69 = mul i64 8, %68
  call void @llvm.memset.p0.i64(ptr align 8 %66, i8 0, i64 %69, i1 false)
  %70 = load ptr, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  ret ptr %70
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

; 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 allocsize(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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { nounwind }
attributes #5 = { nounwind allocsize(0) }

!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 = !{!12, !6, i64 0}
!12 = !{!"scans_obj", !6, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32, !10, i64 40, !10, i64 48}
!13 = !{!12, !10, i64 8}
!14 = !{!12, !10, i64 16}
!15 = !{!12, !10, i64 24}
!16 = !{!12, !10, i64 32}
!17 = !{!12, !10, i64 40}
!18 = !{!12, !10, i64 48}


; 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 nounwind willreturn memory(write, argmem: none, inaccessiblemem: readwrite) uwtable
define dso_local noalias noundef ptr @scans_construct_null(i32 noundef %0) local_unnamed_addr #0 {
  %2 = tail call noalias dereferenceable_or_null(56) ptr @malloc(i64 noundef 56) #3
  store i32 %0, ptr %2, align 8, !tbaa !5
  %3 = zext i32 %0 to i64
  %4 = shl nuw nsw i64 %3, 3
  %calloc = tail call ptr @calloc(i64 1, i64 %4)
  %5 = getelementptr inbounds i8, ptr %2, i64 8
  store ptr %calloc, ptr %5, align 8, !tbaa !11
  %calloc23 = tail call ptr @calloc(i64 1, i64 %4)
  %6 = getelementptr inbounds i8, ptr %2, i64 16
  store ptr %calloc23, ptr %6, align 8, !tbaa !12
  %calloc24 = tail call ptr @calloc(i64 1, i64 %4)
  %7 = getelementptr inbounds i8, ptr %2, i64 24
  store ptr %calloc24, ptr %7, align 8, !tbaa !13
  %calloc25 = tail call ptr @calloc(i64 1, i64 %4)
  %8 = getelementptr inbounds i8, ptr %2, i64 32
  store ptr %calloc25, ptr %8, align 8, !tbaa !14
  %9 = getelementptr inbounds i8, ptr %2, i64 40
  store ptr null, ptr %9, align 8, !tbaa !15
  %calloc26 = tail call ptr @calloc(i64 1, i64 %4)
  %10 = getelementptr inbounds i8, ptr %2, i64 48
  store ptr %calloc26, ptr %10, align 8, !tbaa !16
  ret ptr %2
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @calloc(i64 noundef, i64 noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nofree nounwind willreturn memory(write, argmem: none, inaccessiblemem: readwrite) 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 nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" }
attributes #3 = { nounwind allocsize(0) }

!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 = !{!"scans_obj", !7, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32, !10, i64 40, !10, i64 48}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !10, i64 16}
!13 = !{!6, !10, i64 24}
!14 = !{!6, !10, i64 32}
!15 = !{!6, !10, i64 40}
!16 = !{!6, !10, i64 48}


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