; LLVM IR from aap/pdp6 :: tools (ld6)

; 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"

@symp = external dso_local global i64, align 8
@symtab = external dso_local global [2000 x i64], align 16
@.str.9 = external hidden unnamed_addr constant [21 x i8], align 1

; 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
declare dso_local void @err(i32 noundef, ptr noundef, ...) #1

declare i32 @unrad50(i64 noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local void @checkundef() #1 {
  %1 = alloca i32, align 4
  %2 = alloca [8 x i8], align 1
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  store i64 0, ptr %3, align 8, !tbaa !5
  br label %4

4:                                                ; preds = %23, %0
  %5 = load i64, ptr %3, align 8, !tbaa !5
  %6 = load i64, ptr @symp, align 8, !tbaa !5
  %7 = icmp ult i64 %5, %6
  br i1 %7, label %8, label %26

8:                                                ; preds = %4
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds [2000 x i64], ptr @symtab, i64 0, i64 %9
  %11 = load i64, ptr %10, align 8, !tbaa !5
  %12 = getelementptr inbounds [8 x i8], ptr %2, i64 0, i64 0
  %13 = call i32 @unrad50(i64 noundef %11, ptr noundef %12)
  store i32 %13, ptr %1, align 4, !tbaa !9
  %14 = load i32, ptr %1, align 4, !tbaa !9
  %15 = icmp ne i32 %14, 48
  br i1 %15, label %16, label %17

16:                                               ; preds = %8
  br label %23

17:                                               ; preds = %8
  %18 = getelementptr inbounds [8 x i8], ptr %2, i64 0, i64 0
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = add i64 %19, 1
  %21 = getelementptr inbounds [2000 x i64], ptr @symtab, i64 0, i64 %20
  %22 = load i64, ptr %21, align 8, !tbaa !5
  call void (i32, ptr, ...) @err(i32 noundef 1, ptr noundef @.str.9, ptr noundef %18, i64 noundef %22)
  br label %23

23:                                               ; preds = %17, %16
  %24 = load i64, ptr %3, align 8, !tbaa !5
  %25 = add i64 %24, 2
  store i64 %25, ptr %3, align 8, !tbaa !5
  br label %4, !llvm.loop !11

26:                                               ; preds = %4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  ret void
}

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 = { "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 = !{!"long", !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 = distinct !{!11, !12}
!12 = !{!"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"

@symp = external dso_local local_unnamed_addr global i64, align 8
@symtab = external dso_local local_unnamed_addr global [2000 x i64], align 16
@.str.9 = external hidden unnamed_addr constant [21 x i8], align 1

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

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

; Function Attrs: nounwind uwtable
declare dso_local void @err(i32 noundef, ptr noundef, ...) local_unnamed_addr #1

declare i32 @unrad50(i64 noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local void @checkundef() local_unnamed_addr #1 {
  %1 = alloca [8 x i8], align 1
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %2 = load i64, ptr @symp, align 8, !tbaa !5
  %.not6 = icmp eq i64 %2, 0
  br i1 %.not6, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %10
  %.05 = phi i64 [ %11, %10 ], [ 0, %0 ]
  %3 = getelementptr inbounds [2000 x i64], ptr @symtab, i64 0, i64 %.05
  %4 = load i64, ptr %3, align 16, !tbaa !5
  %5 = call i32 @unrad50(i64 noundef %4, ptr noundef nonnull %1) #3
  %.not = icmp eq i32 %5, 48
  br i1 %.not, label %6, label %10

6:                                                ; preds = %.lr.ph
  %7 = or disjoint i64 %.05, 1
  %8 = getelementptr inbounds [2000 x i64], ptr @symtab, i64 0, i64 %7
  %9 = load i64, ptr %8, align 8, !tbaa !5
  call void (i32, ptr, ...) @err(i32 noundef 1, ptr noundef nonnull @.str.9, ptr noundef nonnull %1, i64 noundef %9)
  br label %10

10:                                               ; preds = %.lr.ph, %6
  %11 = add i64 %.05, 2
  %12 = load i64, ptr @symp, align 8, !tbaa !5
  %13 = icmp ult i64 %11, %12
  br i1 %13, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %10, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  ret void
}

attributes #0 = { mustprogress 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 = { "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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass