; LLVM IR from caryll/otfcc :: lib/bk (bkblock)

; 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.caryll_Buffer = type { i64, i64, i64, 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
declare dso_local void @bkblock_pushint(ptr noundef, i32 noundef, i32 noundef) #1

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

; Function Attrs: nounwind uwtable
define dso_local ptr @bk_newBlockFromBuffer(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = icmp ne ptr %6, null
  br i1 %7, label %9, label %8

8:                                                ; preds = %1
  store ptr null, ptr %2, align 8
  br label %33

9:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %10 = call ptr (i32, ...) @bk_new_Block(i32 noundef 0)
  store ptr %10, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 0, ptr %5, align 8, !tbaa !9
  br label %11

11:                                               ; preds = %27, %9
  %12 = load i64, ptr %5, align 8, !tbaa !9
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.caryll_Buffer, ptr %13, i32 0, i32 1
  %15 = load i64, ptr %14, align 8, !tbaa !11
  %16 = icmp ult i64 %12, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %30

18:                                               ; preds = %11
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.caryll_Buffer, ptr %20, i32 0, i32 3
  %22 = load ptr, ptr %21, align 8, !tbaa !13
  %23 = load i64, ptr %5, align 8, !tbaa !9
  %24 = getelementptr inbounds i8, ptr %22, i64 %23
  %25 = load i8, ptr %24, align 1, !tbaa !14
  %26 = zext i8 %25 to i32
  call void @bkblock_pushint(ptr noundef %19, i32 noundef 1, i32 noundef %26)
  br label %27

27:                                               ; preds = %18
  %28 = load i64, ptr %5, align 8, !tbaa !9
  %29 = add i64 %28, 1
  store i64 %29, ptr %5, align 8, !tbaa !9
  br label %11, !llvm.loop !15

30:                                               ; preds = %17
  %31 = load ptr, ptr %3, align 8, !tbaa !5
  call void @buffree(ptr noundef %31)
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %32, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %33

33:                                               ; preds = %30, %8
  %34 = load ptr, ptr %2, align 8
  ret ptr %34
}

declare void @buffree(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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"caryll_Buffer", !10, i64 0, !10, i64 8, !10, i64 16, !6, i64 24}
!13 = !{!12, !6, i64 24}
!14 = !{!7, !7, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"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"

; Function Attrs: nounwind uwtable
declare dso_local void @bkblock_pushint(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local ptr @bk_new_Block(i32 noundef, ...) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @bk_newBlockFromBuffer(ptr noundef %0) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %15, label %2

2:                                                ; preds = %1
  %3 = tail call ptr (i32, ...) @bk_new_Block(i32 noundef 0)
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load i64, ptr %4, align 8, !tbaa !5
  %.not12 = icmp eq i64 %5, 0
  br i1 %.not12, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %6 = getelementptr inbounds i8, ptr %0, i64 24
  br label %7

._crit_edge:                                      ; preds = %7, %2
  tail call void @buffree(ptr noundef nonnull %0) #2
  br label %15

7:                                                ; preds = %.lr.ph, %7
  %.011 = phi i64 [ 0, %.lr.ph ], [ %12, %7 ]
  %8 = load ptr, ptr %6, align 8, !tbaa !11
  %9 = getelementptr inbounds i8, ptr %8, i64 %.011
  %10 = load i8, ptr %9, align 1, !tbaa !12
  %11 = zext i8 %10 to i32
  tail call void @bkblock_pushint(ptr noundef %3, i32 noundef 1, i32 noundef %11)
  %12 = add nuw i64 %.011, 1
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = icmp ult i64 %12, %13
  br i1 %14, label %7, label %._crit_edge, !llvm.loop !13

15:                                               ; preds = %1, %._crit_edge
  %.09 = phi ptr [ %3, %._crit_edge ], [ null, %1 ]
  ret ptr %.09
}

declare void @buffree(ptr noundef) local_unnamed_addr #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 = { "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, !7, i64 8}
!6 = !{!"caryll_Buffer", !7, i64 0, !7, i64 8, !7, i64 16, !10, i64 24}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 24}
!12 = !{!8, !8, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass