; LLVM IR from intel/QAT_Engine :: qat_evp (qat_pkt_threshold_table_get_threshold)

; 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.cipher_threshold_table_s = type { i32, i32 }

@pkt_threshold_table_size = external hidden global i32, align 4
@qat_pkt_threshold_table = external hidden global [0 x %struct.cipher_threshold_table_s], align 4

; 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 @qat_pkt_threshold_table_get_threshold(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !5
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %25, %1
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = load i32, ptr @pkt_threshold_table_size, align 4, !tbaa !5
  %9 = icmp slt i32 %7, %8
  br i1 %9, label %10, label %28

10:                                               ; preds = %6
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [0 x %struct.cipher_threshold_table_s], ptr @qat_pkt_threshold_table, i64 0, i64 %12
  %14 = getelementptr inbounds %struct.cipher_threshold_table_s, ptr %13, i32 0, i32 0
  %15 = load i32, ptr %14, align 4, !tbaa !9
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = icmp eq i32 %15, %16
  br i1 %17, label %18, label %24

18:                                               ; preds = %10
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [0 x %struct.cipher_threshold_table_s], ptr @qat_pkt_threshold_table, i64 0, i64 %20
  %22 = getelementptr inbounds %struct.cipher_threshold_table_s, ptr %21, i32 0, i32 1
  %23 = load i32, ptr %22, align 4, !tbaa !11
  store i32 %23, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %29

24:                                               ; preds = %10
  br label %25

25:                                               ; preds = %24
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %4, align 4, !tbaa !5
  br label %6, !llvm.loop !12

28:                                               ; preds = %6
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %29

29:                                               ; preds = %28, %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %30 = load i32, ptr %2, align 4
  ret i32 %30
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"cipher_threshold_table_s", !6, i64 0, !6, i64 4}
!11 = !{!10, !6, i64 4}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; 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"

%struct.cipher_threshold_table_s = type { i32, i32 }

@pkt_threshold_table_size = external hidden local_unnamed_addr global i32, align 4
@qat_pkt_threshold_table = external hidden local_unnamed_addr global [0 x %struct.cipher_threshold_table_s], align 4

; Function Attrs: nofree norecurse nosync nounwind memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local i32 @qat_pkt_threshold_table_get_threshold(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @pkt_threshold_table_size, align 4, !tbaa !5
  %3 = icmp sgt i32 %2, 0
  br i1 %3, label %.lr.ph.preheader, label %.loopexit

.lr.ph.preheader:                                 ; preds = %1
  %wide.trip.count = zext nneg i32 %2 to i64
  br label %.lr.ph

4:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.loopexit, label %.lr.ph, !llvm.loop !9

.lr.ph:                                           ; preds = %.lr.ph.preheader, %4
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %4 ]
  %5 = getelementptr inbounds [0 x %struct.cipher_threshold_table_s], ptr @qat_pkt_threshold_table, i64 0, i64 %indvars.iv
  %6 = load i32, ptr %5, align 4, !tbaa !11
  %7 = icmp eq i32 %6, %0
  br i1 %7, label %8, label %4

8:                                                ; preds = %.lr.ph
  %9 = getelementptr inbounds [0 x %struct.cipher_threshold_table_s], ptr @qat_pkt_threshold_table, i64 0, i64 %indvars.iv, i32 1
  %10 = load i32, ptr %9, align 4, !tbaa !13
  br label %.loopexit

.loopexit:                                        ; preds = %4, %1, %8
  %.06 = phi i32 [ %10, %8 ], [ 0, %1 ], [ 0, %4 ]
  ret i32 %.06
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, argmem: none, 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !6, i64 0}
!12 = !{!"cipher_threshold_table_s", !6, i64 0, !6, i64 4}
!13 = !{!12, !6, i64 4}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass