; LLVM IR from xxks-kkk/algo :: queue/deque (deque)

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @pop(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = getelementptr inbounds %struct.DequeRecord, ptr %4, i32 0, i32 4
  %6 = load ptr, ptr %5, align 8, !tbaa !9
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.DequeRecord, ptr %7, i32 0, i32 1
  %9 = load i32, ptr %8, align 4, !tbaa !12
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds i32, ptr %6, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !13
  store i32 %12, ptr %3, align 4, !tbaa !13
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.DequeRecord, ptr %13, i32 0, i32 3
  %15 = load i32, ptr %14, align 4, !tbaa !14
  %16 = add nsw i32 %15, -1
  store i32 %16, ptr %14, align 4, !tbaa !14
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.DequeRecord, ptr %17, i32 0, i32 4
  %19 = load ptr, ptr %18, align 8, !tbaa !9
  %20 = load ptr, ptr %2, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.DequeRecord, ptr %20, i32 0, i32 1
  %22 = load i32, ptr %21, align 4, !tbaa !12
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i32, ptr %19, i64 %23
  store i32 0, ptr %24, align 4, !tbaa !13
  %25 = load ptr, ptr %2, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.DequeRecord, ptr %25, i32 0, i32 1
  %27 = load i32, ptr %26, align 4, !tbaa !12
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %26, align 4, !tbaa !12
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.DequeRecord, ptr %29, i32 0, i32 1
  %31 = load i32, ptr %30, align 4, !tbaa !12
  %32 = load ptr, ptr %2, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.DequeRecord, ptr %32, i32 0, i32 0
  %34 = load i32, ptr %33, align 8, !tbaa !15
  %35 = icmp sge i32 %31, %34
  br i1 %35, label %36, label %39

36:                                               ; preds = %1
  %37 = load ptr, ptr %2, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.DequeRecord, ptr %37, i32 0, i32 1
  store i32 0, ptr %38, align 4, !tbaa !12
  br label %39

39:                                               ; preds = %36, %1
  %40 = load i32, ptr %3, align 4, !tbaa !13
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %40
}

attributes #0 = { nocallback nofree nosync 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" }
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 16}
!10 = !{!"DequeRecord", !11, i64 0, !11, i64 4, !11, i64 8, !11, i64 12, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 4}
!13 = !{!11, !11, i64 0}
!14 = !{!10, !11, i64 12}
!15 = !{!10, !11, 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(readwrite, inaccessiblemem: none) uwtable
define dso_local i32 @pop(ptr nocapture noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %0, i64 4
  %5 = load i32, ptr %4, align 4, !tbaa !11
  %6 = sext i32 %5 to i64
  %7 = getelementptr inbounds i32, ptr %3, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !12
  %9 = getelementptr inbounds i8, ptr %0, i64 12
  %10 = load i32, ptr %9, align 4, !tbaa !13
  %11 = add nsw i32 %10, -1
  store i32 %11, ptr %9, align 4, !tbaa !13
  store i32 0, ptr %7, align 4, !tbaa !12
  %12 = load i32, ptr %4, align 4, !tbaa !11
  %13 = add nsw i32 %12, 1
  %14 = load i32, ptr %0, align 8, !tbaa !14
  %.not = icmp slt i32 %13, %14
  %spec.store.select = select i1 %.not, i32 %13, i32 0
  store i32 %spec.store.select, ptr %4, align 4
  ret i32 %8
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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, !10, i64 16}
!6 = !{!"DequeRecord", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = !{!7, !7, i64 0}
!13 = !{!6, !7, i64 12}
!14 = !{!6, !7, i64 0}


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