; LLVM IR from juliuskoskela/c-vec :: vec (vec_pop)

; 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.s_vec = type { ptr, i64, i64, i64 }

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: nounwind uwtable
declare dso_local ptr @vec_get(ptr noundef, i64 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @vec_pop(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = icmp ne ptr %6, null
  br i1 %7, label %8, label %11

8:                                                ; preds = %2
  %9 = load ptr, ptr %5, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %12, label %11

11:                                               ; preds = %8, %2
  store i32 -1, ptr %3, align 4
  br label %39

12:                                               ; preds = %8
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.s_vec, ptr %13, i32 0, i32 0
  %15 = load ptr, ptr %14, align 8, !tbaa !9
  %16 = icmp ne ptr %15, null
  br i1 %16, label %17, label %22

17:                                               ; preds = %12
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.s_vec, ptr %18, i32 0, i32 3
  %20 = load i64, ptr %19, align 8, !tbaa !12
  %21 = icmp eq i64 %20, 0
  br i1 %21, label %22, label %23

22:                                               ; preds = %17, %12
  store i32 0, ptr %3, align 4
  br label %39

23:                                               ; preds = %17
  br label %24

24:                                               ; preds = %23
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.s_vec, ptr %27, i32 0, i32 3
  %29 = load i64, ptr %28, align 8, !tbaa !12
  %30 = sub i64 %29, 1
  %31 = call ptr @vec_get(ptr noundef %26, i64 noundef %30)
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.s_vec, ptr %32, i32 0, i32 1
  %34 = load i64, ptr %33, align 8, !tbaa !13
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %25, ptr align 1 %31, i64 %34, i1 false)
  %35 = load ptr, ptr %5, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.s_vec, ptr %35, i32 0, i32 3
  %37 = load i64, ptr %36, align 8, !tbaa !12
  %38 = add i64 %37, -1
  store i64 %38, ptr %36, align 8, !tbaa !12
  store i32 1, ptr %3, align 4
  br label %39

39:                                               ; preds = %24, %22, %11
  %40 = load i32, ptr %3, align 4
  ret i32 %40
}

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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, !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 = !{!"s_vec", !6, i64 0, !11, i64 8, !11, i64 16, !11, i64 24}
!11 = !{!"long", !7, i64 0}
!12 = !{!10, !11, i64 24}
!13 = !{!10, !11, i64 8}


; 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 nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: nounwind uwtable
declare dso_local ptr @vec_get(ptr noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 2) i32 @vec_pop(ptr noundef writeonly %0, ptr noundef %1) local_unnamed_addr #1 {
  %3 = icmp ne ptr %0, null
  %4 = icmp ne ptr %1, null
  %or.cond = and i1 %3, %4
  br i1 %or.cond, label %5, label %18

5:                                                ; preds = %2
  %6 = load ptr, ptr %1, align 8, !tbaa !5
  %.not = icmp eq ptr %6, null
  br i1 %.not, label %18, label %7

7:                                                ; preds = %5
  %8 = getelementptr inbounds i8, ptr %1, i64 24
  %9 = load i64, ptr %8, align 8, !tbaa !11
  %10 = icmp eq i64 %9, 0
  br i1 %10, label %18, label %11

11:                                               ; preds = %7
  %12 = add i64 %9, -1
  %13 = tail call ptr @vec_get(ptr noundef nonnull %1, i64 noundef %12)
  %14 = getelementptr inbounds i8, ptr %1, i64 8
  %15 = load i64, ptr %14, align 8, !tbaa !12
  tail call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 1 %0, ptr align 1 %13, i64 %15, i1 false)
  %16 = load i64, ptr %8, align 8, !tbaa !11
  %17 = add i64 %16, -1
  store i64 %17, ptr %8, align 8, !tbaa !11
  br label %18

18:                                               ; preds = %5, %7, %2, %11
  %.0 = phi i32 [ 1, %11 ], [ -1, %2 ], [ 0, %7 ], [ 0, %5 ]
  ret i32 %.0
}

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = !{!"s_vec", !7, i64 0, !10, i64 8, !10, i64 16, !10, 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 = !{!6, !10, i64 24}
!12 = !{!6, !10, i64 8}


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