; LLVM IR from xhub/reshop :: gui/external/imguial/imguial_term.ll (ZNK7ImGuiAl4Fifo4peekEmPvm)

; 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"

%"class.ImGuiAl::Fifo" = type { ptr, i64, i64, i64, i64 }

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

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZNK7ImGuiAl4Fifo4peekEmPvm(ptr noundef nonnull align 8 dereferenceable(40) %0, i64 noundef %1, ptr noundef %2, i64 noundef %3) #2 align 2 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  %11 = alloca i64, align 8
  %12 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  store i64 %3, ptr %8, align 8, !tbaa !9
  %13 = load ptr, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %14 = load i64, ptr %6, align 8, !tbaa !9
  %15 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %13, i32 0, i32 3
  %16 = load i64, ptr %15, align 8, !tbaa !11
  %17 = add i64 %14, %16
  %18 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %13, i32 0, i32 1
  %19 = load i64, ptr %18, align 8, !tbaa !13
  %20 = urem i64 %17, %19
  store i64 %20, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  %21 = load i64, ptr %8, align 8, !tbaa !9
  store i64 %21, ptr %10, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #3
  store i64 0, ptr %11, align 8, !tbaa !9
  %22 = load i64, ptr %10, align 8, !tbaa !9
  %23 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %13, i32 0, i32 1
  %24 = load i64, ptr %23, align 8, !tbaa !13
  %25 = load i64, ptr %9, align 8, !tbaa !9
  %26 = sub i64 %24, %25
  %27 = icmp ugt i64 %22, %26
  br i1 %27, label %28, label %36

28:                                               ; preds = %4
  %29 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %13, i32 0, i32 1
  %30 = load i64, ptr %29, align 8, !tbaa !13
  %31 = load i64, ptr %9, align 8, !tbaa !9
  %32 = sub i64 %30, %31
  store i64 %32, ptr %10, align 8, !tbaa !9
  %33 = load i64, ptr %8, align 8, !tbaa !9
  %34 = load i64, ptr %10, align 8, !tbaa !9
  %35 = sub i64 %33, %34
  store i64 %35, ptr %11, align 8, !tbaa !9
  br label %36

36:                                               ; preds = %28, %4
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #3
  %37 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %13, i32 0, i32 0
  %38 = load ptr, ptr %37, align 8, !tbaa !14
  %39 = load i64, ptr %9, align 8, !tbaa !9
  %40 = getelementptr inbounds i8, ptr %38, i64 %39
  store ptr %40, ptr %12, align 8, !tbaa !5
  %41 = load ptr, ptr %7, align 8, !tbaa !5
  %42 = load ptr, ptr %12, align 8, !tbaa !5
  %43 = load i64, ptr %10, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %41, ptr align 1 %42, i64 %43, i1 false)
  %44 = load ptr, ptr %7, align 8, !tbaa !5
  %45 = load i64, ptr %10, align 8, !tbaa !9
  %46 = getelementptr inbounds i8, ptr %44, i64 %45
  %47 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %13, i32 0, i32 0
  %48 = load ptr, ptr %47, align 8, !tbaa !14
  %49 = load i64, ptr %11, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %46, ptr align 1 %48, i64 %49, i1 false)
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress 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 #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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 24}
!12 = !{!"_ZTSN7ImGuiAl4FifoE", !6, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32}
!13 = !{!12, !10, i64 8}
!14 = !{!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: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZNK7ImGuiAl4Fifo4peekEmPvm(ptr nocapture noundef nonnull readonly align 8 dereferenceable(40) %0, i64 noundef %1, ptr nocapture noundef writeonly %2, i64 noundef %3) local_unnamed_addr #1 align 2 {
  %5 = getelementptr inbounds i8, ptr %0, i64 24
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %7 = add i64 %6, %1
  %8 = getelementptr inbounds i8, ptr %0, i64 8
  %9 = load i64, ptr %8, align 8, !tbaa !11
  %10 = urem i64 %7, %9
  %11 = sub i64 %9, %10
  %spec.select = tail call i64 @llvm.usub.sat.i64(i64 %3, i64 %11)
  %spec.select17 = tail call i64 @llvm.umin.i64(i64 %11, i64 %3)
  %12 = load ptr, ptr %0, align 8, !tbaa !12
  %13 = getelementptr inbounds i8, ptr %12, i64 %10
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %2, ptr align 1 %13, i64 %spec.select17, i1 false)
  %14 = getelementptr inbounds i8, ptr %2, i64 %spec.select17
  %15 = load ptr, ptr %0, align 8, !tbaa !12
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %14, ptr align 1 %15, i64 %spec.select, i1 false)
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.usub.sat.i64(i64, i64) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umin.i64(i64, i64) #2

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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" }
attributes #2 = { nocallback nofree nosync nounwind speculatable 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, !10, i64 24}
!6 = !{!"_ZTSN7ImGuiAl4FifoE", !7, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !7, i64 0}


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