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

; 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: 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 void @CvtNum(i64 noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store i64 %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  br label %8

8:                                                ; preds = %11, %3
  %9 = load i64, ptr %6, align 8, !tbaa !5
  %10 = icmp ugt i64 %9, 0
  br i1 %10, label %11, label %24

11:                                               ; preds = %8
  %12 = load i64, ptr %4, align 8, !tbaa !5
  %13 = urem i64 %12, 10
  store i64 %13, ptr %7, align 8, !tbaa !5
  %14 = load i64, ptr %4, align 8, !tbaa !5
  %15 = udiv i64 %14, 10
  store i64 %15, ptr %4, align 8, !tbaa !5
  %16 = load i64, ptr %6, align 8, !tbaa !5
  %17 = add i64 %16, -1
  store i64 %17, ptr %6, align 8, !tbaa !5
  %18 = load i64, ptr %7, align 8, !tbaa !5
  %19 = add i64 48, %18
  %20 = trunc i64 %19 to i8
  %21 = load ptr, ptr %5, align 8, !tbaa !9
  %22 = load i64, ptr %6, align 8, !tbaa !5
  %23 = getelementptr inbounds i8, ptr %21, i64 %22
  store i8 %20, ptr %23, align 1, !tbaa !11
  br label %8, !llvm.loop !12

24:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret void
}

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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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(argmem: write) uwtable
define dso_local void @CvtNum(i64 noundef %0, ptr nocapture noundef writeonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not7 = icmp eq i64 %2, 0
  br i1 %.not7, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %xtraiter = and i64 %2, 1
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader
  %4 = urem i64 %0, 10
  %5 = udiv i64 %0, 10
  %6 = add nsw i64 %2, -1
  %7 = trunc nuw nsw i64 %4 to i8
  %8 = or disjoint i8 %7, 48
  %9 = getelementptr inbounds i8, ptr %1, i64 %6
  store i8 %8, ptr %9, align 1, !tbaa !5
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader
  %.09.unr = phi i64 [ %0, %.lr.ph.preheader ], [ %5, %.lr.ph.prol ]
  %.068.unr = phi i64 [ %2, %.lr.ph.preheader ], [ %6, %.lr.ph.prol ]
  %10 = icmp eq i64 %2, 1
  br i1 %10, label %._crit_edge, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.prol.loopexit
  %invariant.gep = getelementptr i8, ptr %1, i64 -1
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %.09 = phi i64 [ %.09.unr, %.lr.ph.preheader.new ], [ %16, %.lr.ph ]
  %.068 = phi i64 [ %.068.unr, %.lr.ph.preheader.new ], [ %17, %.lr.ph ]
  %11 = urem i64 %.09, 10
  %12 = udiv i64 %.09, 10
  %13 = trunc nuw nsw i64 %11 to i8
  %14 = or disjoint i8 %13, 48
  %gep = getelementptr i8, ptr %invariant.gep, i64 %.068
  store i8 %14, ptr %gep, align 1, !tbaa !5
  %15 = urem i64 %12, 10
  %16 = udiv i64 %.09, 100
  %17 = add i64 %.068, -2
  %18 = trunc nuw nsw i64 %15 to i8
  %19 = or disjoint i8 %18, 48
  %20 = getelementptr inbounds i8, ptr %1, i64 %17
  store i8 %19, ptr %20, align 1, !tbaa !5
  %.not.1 = icmp eq i64 %17, 0
  br i1 %.not.1, label %._crit_edge, label %.lr.ph, !llvm.loop !8

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %3
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: write) 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass