; LLVM IR from MakeContributions/DSA :: algorithms/C/linked-lists (gl-threads)

; 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.gldll = type { ptr, i64, ptr, i32 }
%struct.glthread_node_ = type { ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local void @glthread_pushfront(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  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
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.gldll, ptr %7, i32 0, i32 0
  %9 = load ptr, ptr %8, align 8, !tbaa !9
  store ptr %9, ptr %5, align 8, !tbaa !5
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.gldll, ptr %10, i32 0, i32 1
  %12 = load i64, ptr %11, align 8, !tbaa !13
  %13 = add i64 %12, 1
  store i64 %13, ptr %11, align 8, !tbaa !13
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = icmp eq ptr %14, null
  br i1 %15, label %16, label %20

16:                                               ; preds = %2
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.gldll, ptr %18, i32 0, i32 0
  store ptr %17, ptr %19, align 8, !tbaa !9
  store i32 1, ptr %6, align 4
  br label %30

20:                                               ; preds = %2
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.glthread_node_, ptr %22, i32 0, i32 1
  store ptr %21, ptr %23, align 8, !tbaa !14
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.glthread_node_, ptr %25, i32 0, i32 0
  store ptr %24, ptr %26, align 8, !tbaa !16
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.gldll, ptr %28, i32 0, i32 0
  store ptr %27, ptr %29, align 8, !tbaa !9
  store i32 0, ptr %6, align 4
  br label %30

30:                                               ; preds = %20, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  %31 = load i32, ptr %6, align 4
  switch i32 %31, label %33 [
    i32 0, label %32
    i32 1, label %32
  ]

32:                                               ; preds = %30, %30
  ret void

33:                                               ; preds = %30
  unreachable
}

; 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 = !{!"", !6, i64 0, !11, i64 8, !6, i64 16, !12, i64 24}
!11 = !{!"long", !7, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!10, !11, i64 8}
!14 = !{!15, !6, i64 8}
!15 = !{!"glthread_node_", !6, i64 0, !6, i64 8}
!16 = !{!15, !6, i64 0}


; 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(write, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @glthread_pushfront(ptr nocapture noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = load ptr, ptr %0, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load i64, ptr %4, align 8, !tbaa !12
  %6 = add i64 %5, 1
  store i64 %6, ptr %4, align 8, !tbaa !12
  %7 = icmp eq ptr %3, null
  br i1 %7, label %10, label %8

8:                                                ; preds = %2
  %9 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %1, ptr %9, align 8, !tbaa !13
  store ptr %3, ptr %1, align 8, !tbaa !15
  br label %10

10:                                               ; preds = %2, %8
  store ptr %1, ptr %0, align 8, !tbaa !5
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: 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" }

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


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