; LLVM IR from goldshtn/shmemq-blog :: shmemq (shmemq_destroy)

; 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._shmemq = type { i64, i32, i64, ptr, i32, i64, ptr }

declare i32 @close(i32 noundef) #0

declare i32 @shm_unlink(ptr noundef) #0

; Function Attrs: nounwind
declare void @free(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @shmemq_destroy(ptr noundef %0, i32 noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct._shmemq, ptr %5, i32 0, i32 6
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct._shmemq, ptr %8, i32 0, i32 2
  %10 = load i64, ptr %9, align 8, !tbaa !14
  %11 = call i32 @munmap(ptr noundef %7, i64 noundef %10) #3
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct._shmemq, ptr %12, i32 0, i32 4
  %14 = load i32, ptr %13, align 8, !tbaa !15
  %15 = call i32 @close(i32 noundef %14)
  %16 = load i32, ptr %4, align 4, !tbaa !9
  %17 = icmp ne i32 %16, 0
  br i1 %17, label %18, label %23

18:                                               ; preds = %2
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct._shmemq, ptr %19, i32 0, i32 3
  %21 = load ptr, ptr %20, align 8, !tbaa !16
  %22 = call i32 @shm_unlink(ptr noundef %21)
  br label %23

23:                                               ; preds = %18, %2
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct._shmemq, ptr %24, i32 0, i32 3
  %26 = load ptr, ptr %25, align 8, !tbaa !16
  call void @free(ptr noundef %26) #3
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  call void @free(ptr noundef %27) #3
  ret void
}

; Function Attrs: nounwind
declare i32 @munmap(ptr noundef, i64 noundef) #1

attributes #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 "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" }
attributes #3 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 48}
!12 = !{!"_shmemq", !13, i64 0, !10, i64 8, !13, i64 16, !6, i64 24, !10, i64 32, !13, i64 40, !6, i64 48}
!13 = !{!"long", !7, i64 0}
!14 = !{!12, !13, i64 16}
!15 = !{!12, !10, i64 32}
!16 = !{!12, !6, i64 24}


; 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"

declare i32 @close(i32 noundef) local_unnamed_addr #0

declare i32 @shm_unlink(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @shmemq_destroy(ptr nocapture noundef %0, i32 noundef %1) local_unnamed_addr #2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 48
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  %6 = load i64, ptr %5, align 8, !tbaa !12
  %7 = tail call i32 @munmap(ptr noundef %4, i64 noundef %6) #4
  %8 = getelementptr inbounds i8, ptr %0, i64 32
  %9 = load i32, ptr %8, align 8, !tbaa !13
  %10 = tail call i32 @close(i32 noundef %9) #4
  %.not = icmp eq i32 %1, 0
  br i1 %.not, label %15, label %11

11:                                               ; preds = %2
  %12 = getelementptr inbounds i8, ptr %0, i64 24
  %13 = load ptr, ptr %12, align 8, !tbaa !14
  %14 = tail call i32 @shm_unlink(ptr noundef %13) #4
  br label %15

15:                                               ; preds = %11, %2
  %16 = getelementptr inbounds i8, ptr %0, i64 24
  %17 = load ptr, ptr %16, align 8, !tbaa !14
  tail call void @free(ptr noundef %17) #4
  tail call void @free(ptr noundef nonnull %0) #4
  ret void
}

; Function Attrs: nounwind
declare i32 @munmap(ptr noundef, i64 noundef) local_unnamed_addr #3

attributes #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 nounwind willreturn allockind("free") memory(argmem: readwrite, 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 = { 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 #3 = { nounwind "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 #4 = { 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, !11, i64 48}
!6 = !{!"_shmemq", !7, i64 0, !10, i64 8, !7, i64 16, !11, i64 24, !10, i64 32, !7, i64 40, !11, i64 48}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!6, !7, i64 16}
!13 = !{!6, !10, i64 32}
!14 = !{!6, !11, i64 24}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass