; LLVM IR from thalium/icebox :: third_party/virtualbox/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Universal (IScsiFindTcbByITT)

; 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._LIST_ENTRY = type { ptr, ptr }
%struct._ISCSI_TCB = type { %struct._LIST_ENTRY, i8, i32, i8, i8, i32, i32, ptr, i32, i32, i32, %struct._ISCSI_XFER_CONTEXT, ptr }
%struct._ISCSI_XFER_CONTEXT = type { i32, i32, i32, i32 }

; 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
define dso_local ptr @IScsiFindTcbByITT(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store ptr null, ptr %5, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct._LIST_ENTRY, ptr %7, i32 0, i32 0
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  store ptr %9, ptr %6, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %26, %2
  %11 = load ptr, ptr %6, align 8, !tbaa !5
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = icmp ne ptr %11, %12
  br i1 %13, label %14, label %30

14:                                               ; preds = %10
  %15 = load ptr, ptr %6, align 8, !tbaa !5
  %16 = ptrtoint ptr %15 to i64
  %17 = sub i64 %16, 0
  %18 = inttoptr i64 %17 to ptr
  store ptr %18, ptr %5, align 8, !tbaa !5
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct._ISCSI_TCB, ptr %19, i32 0, i32 8
  %21 = load i32, ptr %20, align 8, !tbaa !13
  %22 = load i32, ptr %4, align 4, !tbaa !9
  %23 = icmp eq i32 %21, %22
  br i1 %23, label %24, label %25

24:                                               ; preds = %14
  br label %30

25:                                               ; preds = %14
  store ptr null, ptr %5, align 8, !tbaa !5
  br label %26

26:                                               ; preds = %25
  %27 = load ptr, ptr %6, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct._LIST_ENTRY, ptr %27, i32 0, i32 0
  %29 = load ptr, ptr %28, align 8, !tbaa !11
  store ptr %29, ptr %6, align 8, !tbaa !5
  br label %10, !llvm.loop !16

30:                                               ; preds = %24, %10
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret ptr %31
}

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 = { 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 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_LIST_ENTRY", !6, i64 0, !6, i64 8}
!13 = !{!14, !10, i64 48}
!14 = !{!"_ISCSI_TCB", !12, i64 0, !7, i64 16, !10, i64 20, !7, i64 24, !7, i64 25, !10, i64 28, !10, i64 32, !6, i64 40, !10, i64 48, !10, i64 52, !10, i64 56, !15, i64 60, !6, i64 80}
!15 = !{!"_ISCSI_XFER_CONTEXT", !10, i64 0, !10, i64 4, !10, i64 8, !10, i64 12}
!16 = distinct !{!16, !17}
!17 = !{!"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 ptr @IScsiFindTcbByITT(ptr noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  br label %3

3:                                                ; preds = %4, %2
  %.0.in = phi ptr [ %0, %2 ], [ %.0, %4 ]
  %.0 = load ptr, ptr %.0.in, align 8, !tbaa !5
  %.not = icmp eq ptr %.0, %0
  br i1 %.not, label %8, label %4

4:                                                ; preds = %3
  %5 = getelementptr inbounds i8, ptr %.0, i64 48
  %6 = load i32, ptr %5, align 8, !tbaa !10
  %7 = icmp eq i32 %6, %1
  br i1 %7, label %8, label %3, !llvm.loop !14

8:                                                ; preds = %4, %3
  %.1 = phi ptr [ %.0, %4 ], [ null, %3 ]
  ret ptr %.1
}

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 = !{!"_LIST_ENTRY", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !12, i64 48}
!11 = !{!"_ISCSI_TCB", !6, i64 0, !8, i64 16, !12, i64 20, !8, i64 24, !8, i64 25, !12, i64 28, !12, i64 32, !7, i64 40, !12, i64 48, !12, i64 52, !12, i64 56, !13, i64 60, !7, i64 80}
!12 = !{!"int", !8, i64 0}
!13 = !{!"_ISCSI_XFER_CONTEXT", !12, i64 0, !12, i64 4, !12, i64 8, !12, i64 12}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


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