; LLVM IR from tezc/sc :: buffer (sc_buf)

; 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.sc_buf = type { ptr, i64, i64, i64, i64, i32, i8 }

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
define dso_local i64 @sc_buf_peek_data(ptr noundef %0, i64 noundef %1, ptr noundef %2, i64 noundef %3) #2 {
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i64 %1, ptr %7, align 8, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !5
  store i64 %3, ptr %9, align 8, !tbaa !9
  %10 = load ptr, ptr %6, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.sc_buf, ptr %10, i32 0, i32 5
  %12 = load i32, ptr %11, align 8, !tbaa !11
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %22, label %14

14:                                               ; preds = %4
  %15 = load i64, ptr %7, align 8, !tbaa !9
  %16 = load i64, ptr %9, align 8, !tbaa !9
  %17 = add i64 %15, %16
  %18 = load ptr, ptr %6, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.sc_buf, ptr %18, i32 0, i32 4
  %20 = load i64, ptr %19, align 8, !tbaa !15
  %21 = icmp ugt i64 %17, %20
  br i1 %21, label %22, label %29

22:                                               ; preds = %14, %4
  %23 = load ptr, ptr %6, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.sc_buf, ptr %23, i32 0, i32 5
  %25 = load i32, ptr %24, align 8, !tbaa !11
  %26 = or i32 %25, 1
  store i32 %26, ptr %24, align 8, !tbaa !11
  %27 = load ptr, ptr %8, align 8, !tbaa !5
  %28 = load i64, ptr %9, align 8, !tbaa !9
  call void @llvm.memset.p0.i64(ptr align 1 %27, i8 0, i64 %28, i1 false)
  store i64 0, ptr %5, align 8
  br label %38

29:                                               ; preds = %14
  %30 = load ptr, ptr %8, align 8, !tbaa !5
  %31 = load ptr, ptr %6, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.sc_buf, ptr %31, i32 0, i32 0
  %33 = load ptr, ptr %32, align 8, !tbaa !16
  %34 = load i64, ptr %7, align 8, !tbaa !9
  %35 = getelementptr inbounds i8, ptr %33, i64 %34
  %36 = load i64, ptr %9, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %30, ptr align 1 %35, i64 %36, i1 false)
  %37 = load i64, ptr %9, align 8, !tbaa !9
  store i64 %37, ptr %5, align 8
  br label %38

38:                                               ; preds = %29, %22
  %39 = load i64, ptr %5, align 8
  ret i64 %39
}

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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" }

!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, !13, i64 40}
!12 = !{!"sc_buf", !6, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32, !13, i64 40, !14, i64 44}
!13 = !{!"int", !7, i64 0}
!14 = !{!"_Bool", !7, i64 0}
!15 = !{!12, !10, i64 32}
!16 = !{!12, !6, i64 0}


; 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 nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, inaccessiblemem: none) uwtable
define dso_local noundef i64 @sc_buf_peek_data(ptr nocapture noundef %0, i64 noundef %1, ptr nocapture noundef writeonly %2, i64 noundef %3) local_unnamed_addr #2 {
  %5 = getelementptr inbounds i8, ptr %0, i64 40
  %6 = load i32, ptr %5, align 8, !tbaa !5
  %.not = icmp eq i32 %6, 0
  br i1 %.not, label %7, label %12

7:                                                ; preds = %4
  %8 = add i64 %3, %1
  %9 = getelementptr inbounds i8, ptr %0, i64 32
  %10 = load i64, ptr %9, align 8, !tbaa !13
  %11 = icmp ugt i64 %8, %10
  br i1 %11, label %12, label %14

12:                                               ; preds = %7, %4
  %13 = or i32 %6, 1
  store i32 %13, ptr %5, align 8, !tbaa !5
  tail call void @llvm.memset.p0.i64(ptr align 1 %2, i8 0, i64 %3, i1 false)
  br label %17

14:                                               ; preds = %7
  %15 = load ptr, ptr %0, align 8, !tbaa !14
  %16 = getelementptr inbounds i8, ptr %15, i64 %1
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %2, ptr align 1 %16, i64 %3, i1 false)
  br label %17

17:                                               ; preds = %14, %12
  %.0 = phi i64 [ 0, %12 ], [ %3, %14 ]
  ret i64 %.0
}

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #1 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, 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, !11, i64 40}
!6 = !{!"sc_buf", !7, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32, !11, i64 40, !12, i64 44}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"int", !8, i64 0}
!12 = !{!"_Bool", !8, i64 0}
!13 = !{!6, !10, i64 32}
!14 = !{!6, !7, i64 0}


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