; LLVM IR from xhub/reshop :: gui/external/imguial/imguial_term.ll (ZN7ImGuiAl4Fifo4readEPvm)

; 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: mustprogress nounwind uwtable
define dso_local void @_ZN7ImGuiAl4Fifo4readEPvm(ptr noundef nonnull align 8 dereferenceable(40) %0, ptr noundef %1, i64 noundef %2) #0 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  %10 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %11 = load i64, ptr %6, align 8, !tbaa !9
  store i64 %11, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 0, ptr %8, align 8, !tbaa !9
  %12 = load i64, ptr %7, align 8, !tbaa !9
  %13 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %10, i32 0, i32 1
  %14 = load i64, ptr %13, align 8, !tbaa !11
  %15 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %10, i32 0, i32 3
  %16 = load i64, ptr %15, align 8, !tbaa !13
  %17 = sub i64 %14, %16
  %18 = icmp ugt i64 %12, %17
  br i1 %18, label %19, label %28

19:                                               ; preds = %3
  %20 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %10, i32 0, i32 1
  %21 = load i64, ptr %20, align 8, !tbaa !11
  %22 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %10, i32 0, i32 3
  %23 = load i64, ptr %22, align 8, !tbaa !13
  %24 = sub i64 %21, %23
  store i64 %24, ptr %7, align 8, !tbaa !9
  %25 = load i64, ptr %6, align 8, !tbaa !9
  %26 = load i64, ptr %7, align 8, !tbaa !9
  %27 = sub i64 %25, %26
  store i64 %27, ptr %8, align 8, !tbaa !9
  br label %28

28:                                               ; preds = %19, %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %29 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %10, i32 0, i32 0
  %30 = load ptr, ptr %29, align 8, !tbaa !14
  %31 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %10, i32 0, i32 3
  %32 = load i64, ptr %31, align 8, !tbaa !13
  %33 = getelementptr inbounds i8, ptr %30, i64 %32
  store ptr %33, ptr %9, align 8, !tbaa !5
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = load ptr, ptr %9, align 8, !tbaa !5
  %36 = load i64, ptr %7, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %34, ptr align 1 %35, i64 %36, i1 false)
  %37 = load ptr, ptr %5, align 8, !tbaa !5
  %38 = load i64, ptr %7, align 8, !tbaa !9
  %39 = getelementptr inbounds i8, ptr %37, i64 %38
  %40 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %10, i32 0, i32 0
  %41 = load ptr, ptr %40, align 8, !tbaa !14
  %42 = load i64, ptr %8, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %39, ptr align 1 %41, i64 %42, i1 false)
  %43 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %10, i32 0, i32 3
  %44 = load i64, ptr %43, align 8, !tbaa !13
  %45 = load i64, ptr %6, align 8, !tbaa !9
  %46 = add i64 %44, %45
  %47 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %10, i32 0, i32 1
  %48 = load i64, ptr %47, align 8, !tbaa !11
  %49 = urem i64 %46, %48
  %50 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %10, i32 0, i32 3
  store i64 %49, ptr %50, align 8, !tbaa !13
  %51 = load i64, ptr %6, align 8, !tbaa !9
  %52 = getelementptr inbounds %"class.ImGuiAl::Fifo", ptr %10, i32 0, i32 2
  %53 = load i64, ptr %52, align 8, !tbaa !15
  %54 = add i64 %53, %51
  store i64 %54, ptr %52, align 8, !tbaa !15
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; 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) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 8}
!12 = !{!"_ZTSN7ImGuiAl4FifoE", !6, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32}
!13 = !{!12, !10, i64 24}
!14 = !{!12, !6, i64 0}
!15 = !{!12, !10, i64 16}


; 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 nofree norecurse nosync nounwind willreturn memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZN7ImGuiAl4Fifo4readEPvm(ptr nocapture noundef nonnull align 8 dereferenceable(40) %0, ptr nocapture noundef writeonly %1, i64 noundef %2) local_unnamed_addr #0 align 2 {
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load i64, ptr %4, align 8, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %0, i64 24
  %7 = load i64, ptr %6, align 8, !tbaa !11
  %8 = sub i64 %5, %7
  %spec.select = tail call i64 @llvm.usub.sat.i64(i64 %2, i64 %8)
  %spec.select15 = tail call i64 @llvm.umin.i64(i64 %8, i64 %2)
  %9 = load ptr, ptr %0, align 8, !tbaa !12
  %10 = getelementptr inbounds i8, ptr %9, i64 %7
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %1, ptr align 1 %10, i64 %spec.select15, i1 false)
  %11 = getelementptr inbounds i8, ptr %1, i64 %spec.select15
  %12 = load ptr, ptr %0, align 8, !tbaa !12
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %11, ptr align 1 %12, i64 %spec.select, i1 false)
  %13 = load i64, ptr %6, align 8, !tbaa !11
  %14 = add i64 %13, %2
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = urem i64 %14, %15
  store i64 %16, ptr %6, align 8, !tbaa !11
  %17 = getelementptr inbounds i8, ptr %0, i64 16
  %18 = load i64, ptr %17, align 8, !tbaa !13
  %19 = add i64 %18, %2
  store i64 %19, ptr %17, align 8, !tbaa !13
  ret void
}

; 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: 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 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 #1 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 8}
!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 24}
!12 = !{!6, !7, i64 0}
!13 = !{!6, !10, i64 16}


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