; LLVM IR from artagnon/phoenixfs :: xdiff (xemit)

; 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.s_xdemitconf = type { i64, i64, i64, ptr, ptr, ptr }
%struct.s_xdchange = type { ptr, i64, i64, i64, i64 }

; Function Attrs: nounwind uwtable
define dso_local ptr @xdl_get_hunk(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.s_xdemitconf, ptr %8, i32 0, i32 0
  %10 = load i64, ptr %9, align 8, !tbaa !9
  %11 = mul nsw i64 2, %10
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.s_xdemitconf, ptr %12, i32 0, i32 1
  %14 = load i64, ptr %13, align 8, !tbaa !12
  %15 = add nsw i64 %11, %14
  store i64 %15, ptr %7, align 8, !tbaa !13
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %16, ptr %6, align 8, !tbaa !5
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.s_xdchange, ptr %17, i32 0, i32 0
  %19 = load ptr, ptr %18, align 8, !tbaa !14
  store ptr %19, ptr %5, align 8, !tbaa !5
  br label %20

20:                                               ; preds = %39, %2
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = icmp ne ptr %21, null
  br i1 %22, label %23, label %44

23:                                               ; preds = %20
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.s_xdchange, ptr %24, i32 0, i32 1
  %26 = load i64, ptr %25, align 8, !tbaa !16
  %27 = load ptr, ptr %6, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.s_xdchange, ptr %27, i32 0, i32 1
  %29 = load i64, ptr %28, align 8, !tbaa !16
  %30 = load ptr, ptr %6, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.s_xdchange, ptr %30, i32 0, i32 3
  %32 = load i64, ptr %31, align 8, !tbaa !17
  %33 = add nsw i64 %29, %32
  %34 = sub nsw i64 %26, %33
  %35 = load i64, ptr %7, align 8, !tbaa !13
  %36 = icmp sgt i64 %34, %35
  br i1 %36, label %37, label %38

37:                                               ; preds = %23
  br label %44

38:                                               ; preds = %23
  br label %39

39:                                               ; preds = %38
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %40, ptr %6, align 8, !tbaa !5
  %41 = load ptr, ptr %5, align 8, !tbaa !5
  %42 = getelementptr inbounds %struct.s_xdchange, ptr %41, i32 0, i32 0
  %43 = load ptr, ptr %42, align 8, !tbaa !14
  store ptr %43, ptr %5, align 8, !tbaa !5
  br label %20, !llvm.loop !18

44:                                               ; preds = %37, %20
  %45 = load ptr, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret ptr %45
}

; 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 nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"s_xdemitconf", !11, i64 0, !11, i64 8, !11, i64 16, !6, i64 24, !6, i64 32, !6, i64 40}
!11 = !{!"long", !7, i64 0}
!12 = !{!10, !11, i64 8}
!13 = !{!11, !11, i64 0}
!14 = !{!15, !6, i64 0}
!15 = !{!"s_xdchange", !6, i64 0, !11, i64 8, !11, i64 16, !11, i64 24, !11, i64 32}
!16 = !{!15, !11, i64 8}
!17 = !{!15, !11, i64 24}
!18 = distinct !{!18, !19}
!19 = !{!"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: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local noundef ptr @xdl_get_hunk(ptr noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = load i64, ptr %1, align 8, !tbaa !5
  %4 = shl nsw i64 %3, 1
  %5 = getelementptr inbounds i8, ptr %1, i64 8
  %6 = load i64, ptr %5, align 8, !tbaa !11
  %7 = add nsw i64 %4, %6
  br label %8

8:                                                ; preds = %9, %2
  %.011 = phi ptr [ %0, %2 ], [ %.0, %9 ]
  %.0 = load ptr, ptr %.011, align 8, !tbaa !12
  %.not = icmp eq ptr %.0, null
  br i1 %.not, label %19, label %9

9:                                                ; preds = %8
  %10 = getelementptr inbounds i8, ptr %.0, i64 8
  %11 = load i64, ptr %10, align 8, !tbaa !14
  %12 = getelementptr inbounds i8, ptr %.011, i64 8
  %13 = load i64, ptr %12, align 8, !tbaa !14
  %14 = getelementptr inbounds i8, ptr %.011, i64 24
  %15 = load i64, ptr %14, align 8, !tbaa !15
  %16 = add i64 %13, %15
  %17 = sub i64 %11, %16
  %18 = icmp sgt i64 %17, %7
  br i1 %18, label %19, label %8, !llvm.loop !16

19:                                               ; preds = %9, %8
  ret ptr %.011
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, 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, !7, i64 0}
!6 = !{!"s_xdemitconf", !7, i64 0, !7, i64 8, !7, i64 16, !10, i64 24, !10, i64 32, !10, i64 40}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 8}
!12 = !{!13, !10, i64 0}
!13 = !{!"s_xdchange", !10, i64 0, !7, i64 8, !7, i64 16, !7, i64 24, !7, i64 32}
!14 = !{!13, !7, i64 8}
!15 = !{!13, !7, i64 24}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass