; LLVM IR from jgaeddert/liquid-dsp :: src/framing/src (qpilotgen)

; 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.div_t = type { i32, i32 }

; Function Attrs: nounwind uwtable
define dso_local i32 @qpilot_num_pilots(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca %struct.div_t, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %12, label %9

9:                                                ; preds = %2
  %10 = load i32, ptr %5, align 4, !tbaa !5
  %11 = icmp ult i32 %10, 2
  br i1 %11, label %12, label %13

12:                                               ; preds = %9, %2
  store i32 0, ptr %3, align 4
  br label %26

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = sub i32 %15, 1
  %17 = call i64 @div(i32 noundef %14, i32 noundef %16) #4
  store i64 %17, ptr %6, align 4
  %18 = getelementptr inbounds %struct.div_t, ptr %6, i32 0, i32 0
  %19 = load i32, ptr %18, align 4, !tbaa !9
  %20 = getelementptr inbounds %struct.div_t, ptr %6, i32 0, i32 1
  %21 = load i32, ptr %20, align 4, !tbaa !11
  %22 = icmp ne i32 %21, 0
  %23 = zext i1 %22 to i64
  %24 = select i1 %22, i32 1, i32 0
  %25 = add nsw i32 %19, %24
  store i32 %25, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %26

26:                                               ; preds = %13, %12
  %27 = load i32, ptr %3, align 4
  ret i32 %27
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind willreturn memory(none)
declare i64 @div(i32 noundef, i32 noundef) #2

; 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 willreturn memory(none) "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 }
attributes #4 = { nounwind willreturn memory(none) }

!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 = !{!"", !6, i64 0, !6, i64 4}
!11 = !{!10, !6, i64 4}


; 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 nosync nounwind willreturn memory(none) uwtable
define dso_local i32 @qpilot_num_pilots(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i32 %0, 0
  %4 = icmp ult i32 %1, 2
  %or.cond = or i1 %3, %4
  br i1 %or.cond, label %10, label %5

5:                                                ; preds = %2
  %6 = add i32 %1, -1
  %7 = tail call i64 @div(i32 noundef %0, i32 noundef %6) #2
  %.sroa.0.0.extract.trunc = trunc i64 %7 to i32
  %.not = icmp ugt i64 %7, 4294967295
  %8 = zext i1 %.not to i32
  %9 = add nsw i32 %8, %.sroa.0.0.extract.trunc
  br label %10

10:                                               ; preds = %2, %5
  %.0 = phi i32 [ %9, %5 ], [ 0, %2 ]
  ret i32 %.0
}

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
declare i64 @div(i32 noundef, i32 noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(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" }
attributes #1 = { mustprogress nofree nosync nounwind willreturn memory(none) "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 willreturn memory(none) }

!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)"}


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