; LLVM IR from thalium/icebox :: third_party/virtualbox/src/VBox/Devices/EFI/Firmware/MdePkg/Library/UefiLib_ (UnicodeStringDisplayLength)

; 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"

; Function Attrs: nounwind uwtable
declare dso_local i64 @GetGlyphWidth(i16 noundef zeroext) #0

; 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

; Function Attrs: nounwind uwtable
define dso_local i64 @UnicodeStringDisplayLength(ptr noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store i64 0, ptr %2, align 8
  store i32 1, ptr %6, align 4
  br label %31

10:                                               ; preds = %1
  store i64 0, ptr %4, align 8, !tbaa !9
  br label %11

11:                                               ; preds = %23, %10
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = load i16, ptr %12, align 2, !tbaa !11
  %14 = zext i16 %13 to i32
  %15 = icmp ne i32 %14, 0
  br i1 %15, label %16, label %29

16:                                               ; preds = %11
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = load i16, ptr %17, align 2, !tbaa !11
  %19 = call i64 @GetGlyphWidth(i16 noundef zeroext %18)
  store i64 %19, ptr %5, align 8, !tbaa !9
  %20 = load i64, ptr %5, align 8, !tbaa !9
  %21 = icmp eq i64 %20, 0
  br i1 %21, label %22, label %23

22:                                               ; preds = %16
  store i64 0, ptr %2, align 8
  store i32 1, ptr %6, align 4
  br label %31

23:                                               ; preds = %16
  %24 = load i64, ptr %5, align 8, !tbaa !9
  %25 = load i64, ptr %4, align 8, !tbaa !9
  %26 = add i64 %25, %24
  store i64 %26, ptr %4, align 8, !tbaa !9
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = getelementptr inbounds i16, ptr %27, i32 1
  store ptr %28, ptr %3, align 8, !tbaa !5
  br label %11, !llvm.loop !13

29:                                               ; preds = %11
  %30 = load i64, ptr %4, align 8, !tbaa !9
  store i64 %30, ptr %2, align 8
  store i32 1, ptr %6, align 4
  br label %31

31:                                               ; preds = %29, %22, %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %32 = load i64, ptr %2, align 8
  ret i64 %32
}

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, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"short", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: nounwind uwtable
declare dso_local i64 @GetGlyphWidth(i16 noundef zeroext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i64 @UnicodeStringDisplayLength(ptr noundef readonly %0) local_unnamed_addr #0 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %1
  %3 = load i16, ptr %0, align 2, !tbaa !5
  %.not12 = icmp eq i16 %3, 0
  br i1 %.not12, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader, %7
  %4 = phi i16 [ %10, %7 ], [ %3, %.preheader ]
  %.0814 = phi i64 [ %8, %7 ], [ 0, %.preheader ]
  %.0913 = phi ptr [ %9, %7 ], [ %0, %.preheader ]
  %5 = tail call i64 @GetGlyphWidth(i16 noundef zeroext %4)
  %6 = icmp eq i64 %5, 0
  br i1 %6, label %.loopexit, label %7

7:                                                ; preds = %.lr.ph
  %8 = add i64 %5, %.0814
  %9 = getelementptr inbounds i8, ptr %.0913, i64 2
  %10 = load i16, ptr %9, align 2, !tbaa !5
  %.not = icmp eq i16 %10, 0
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !9

.loopexit:                                        ; preds = %.lr.ph, %7, %.preheader, %1
  %.0 = phi i64 [ 0, %1 ], [ 0, %.preheader ], [ 0, %.lr.ph ], [ %8, %7 ]
  ret i64 %.0
}

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" }

!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 = !{!"short", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass