; LLVM IR from CLASS-SZ/class_sz :: class-sz/tools (r8lib)

; 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"

@.str = external hidden unnamed_addr constant [2 x i8], align 1
@.str.22 = external hidden unnamed_addr constant [24 x i8], align 1
@.str.23 = external hidden unnamed_addr constant [35 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
define dso_local i32 @perm0_check(i32 noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %5, align 4, !tbaa !5
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %39, %2
  %9 = load i32, ptr %7, align 4, !tbaa !5
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %12, label %42

12:                                               ; preds = %8
  store i32 1, ptr %5, align 4, !tbaa !5
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %27, %12
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = icmp slt i32 %14, %15
  br i1 %16, label %17, label %30

17:                                               ; preds = %13
  %18 = load ptr, ptr %4, align 8, !tbaa !9
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i32, ptr %18, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = load i32, ptr %7, align 4, !tbaa !5
  %24 = icmp eq i32 %22, %23
  br i1 %24, label %25, label %26

25:                                               ; preds = %17
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %30

26:                                               ; preds = %17
  br label %27

27:                                               ; preds = %26
  %28 = load i32, ptr %6, align 4, !tbaa !5
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %6, align 4, !tbaa !5
  br label %13, !llvm.loop !11

30:                                               ; preds = %25, %13
  %31 = load i32, ptr %5, align 4, !tbaa !5
  %32 = icmp ne i32 %31, 0
  br i1 %32, label %33, label %38

33:                                               ; preds = %30
  %34 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  %35 = call i32 (ptr, ...) @printf(ptr noundef @.str.22)
  %36 = load i32, ptr %7, align 4, !tbaa !5
  %37 = call i32 (ptr, ...) @printf(ptr noundef @.str.23, i32 noundef %36)
  br label %42

38:                                               ; preds = %30
  br label %39

39:                                               ; preds = %38
  %40 = load i32, ptr %7, align 4, !tbaa !5
  %41 = add nsw i32 %40, 1
  store i32 %41, ptr %7, align 4, !tbaa !5
  br label %8, !llvm.loop !13

42:                                               ; preds = %33, %8
  %43 = load i32, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret i32 %43
}

declare i32 @printf(ptr noundef, ...) #2

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


; 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"

@.str = external hidden unnamed_addr constant [2 x i8], align 1
@.str.22 = external hidden unnamed_addr constant [24 x i8], align 1
@.str.23 = external hidden unnamed_addr constant [35 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local range(i32 0, 2) i32 @perm0_check(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %0, 0
  br i1 %3, label %.preheader.us.preheader, label %.loopexit

.preheader.us.preheader:                          ; preds = %2
  %wide.trip.count = zext nneg i32 %0 to i64
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %9
  %.017.us = phi i32 [ %10, %9 ], [ 0, %.preheader.us.preheader ]
  br label %5

4:                                                ; preds = %5
  %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 %.critedge, label %5, !llvm.loop !5

5:                                                ; preds = %.preheader.us, %4
  %indvars.iv = phi i64 [ 0, %.preheader.us ], [ %indvars.iv.next, %4 ]
  %6 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
  %7 = load i32, ptr %6, align 4, !tbaa !7
  %8 = icmp eq i32 %7, %.017.us
  br i1 %8, label %9, label %4

9:                                                ; preds = %5
  %10 = add nuw nsw i32 %.017.us, 1
  %exitcond20.not = icmp eq i32 %10, %0
  br i1 %exitcond20.not, label %.loopexit, label %.preheader.us, !llvm.loop !11

.critedge:                                        ; preds = %4
  %11 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  %12 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.22)
  %13 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.23, i32 noundef %.017.us)
  br label %.loopexit

.loopexit:                                        ; preds = %9, %2, %.critedge
  %.2 = phi i32 [ 1, %.critedge ], [ 0, %2 ], [ 0, %9 ]
  ret i32 %.2
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { nofree 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 = { nofree nounwind "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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = distinct !{!11, !6}


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