; LLVM IR from gognl/VMBR :: victim/src/util (util)

; 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 zeroext i8 @memcmp(ptr noundef %0, ptr noundef %1, i32 noundef %2) #1 section ".vmm" {
  %4 = alloca i8, align 1
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %29, %3
  %11 = load i32, ptr %8, align 4, !tbaa !9
  %12 = load i32, ptr %7, align 4, !tbaa !9
  %13 = icmp ult i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  store i32 2, ptr %9, align 4
  br label %32

15:                                               ; preds = %10
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load i8, ptr %16, align 1, !tbaa !11
  %18 = zext i8 %17 to i32
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = load i8, ptr %19, align 1, !tbaa !11
  %21 = zext i8 %20 to i32
  %22 = icmp ne i32 %18, %21
  br i1 %22, label %23, label %24

23:                                               ; preds = %15
  store i8 0, ptr %4, align 1
  store i32 1, ptr %9, align 4
  br label %32

24:                                               ; preds = %15
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = getelementptr inbounds i8, ptr %25, i32 1
  store ptr %26, ptr %5, align 8, !tbaa !5
  %27 = load ptr, ptr %6, align 8, !tbaa !5
  %28 = getelementptr inbounds i8, ptr %27, i32 1
  store ptr %28, ptr %6, align 8, !tbaa !5
  br label %29

29:                                               ; preds = %24
  %30 = load i32, ptr %8, align 4, !tbaa !9
  %31 = add i32 %30, 1
  store i32 %31, ptr %8, align 4, !tbaa !9
  br label %10, !llvm.loop !12

32:                                               ; preds = %23, %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %33 = load i32, ptr %9, align 4
  switch i32 %33, label %37 [
    i32 2, label %34
    i32 1, label %35
  ]

34:                                               ; preds = %32
  store i8 1, ptr %4, align 1
  br label %35

35:                                               ; preds = %34, %32
  %36 = load i8, ptr %4, align 1
  ret i8 %36

37:                                               ; preds = %32
  unreachable
}

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 = !{!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(read, inaccessiblemem: none) uwtable
define dso_local zeroext range(i8 0, 2) i8 @memcmp(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 section ".vmm" {
  %.not1213 = icmp eq i32 %2, 0
  br i1 %.not1213, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %4 = load i8, ptr %0, align 1, !tbaa !5
  %5 = load i8, ptr %1, align 1, !tbaa !5
  %.not20 = icmp eq i8 %4, %5
  br i1 %.not20, label %.lr.ph24, label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph24
  %6 = getelementptr inbounds i8, ptr %.0111423, i64 1
  %7 = getelementptr inbounds i8, ptr %.0101522, i64 1
  %8 = load i8, ptr %6, align 1, !tbaa !5
  %9 = load i8, ptr %7, align 1, !tbaa !5
  %.not = icmp eq i8 %8, %9
  br i1 %.not, label %.lr.ph24, label %._crit_edge.loopexit.loopexit, !llvm.loop !8

.lr.ph24:                                         ; preds = %.lr.ph.preheader, %.lr.ph
  %.0111423 = phi ptr [ %6, %.lr.ph ], [ %0, %.lr.ph.preheader ]
  %.0101522 = phi ptr [ %7, %.lr.ph ], [ %1, %.lr.ph.preheader ]
  %.081621 = phi i32 [ %10, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %10 = add nuw i32 %.081621, 1
  %exitcond = icmp eq i32 %10, %2
  br i1 %exitcond, label %._crit_edge.loopexit.loopexit, label %.lr.ph, !llvm.loop !8

._crit_edge.loopexit.loopexit:                    ; preds = %.lr.ph, %.lr.ph24
  %.not12.le = icmp uge i32 %10, %2
  %11 = zext i1 %.not12.le to i8
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.preheader, %._crit_edge.loopexit.loopexit, %3
  %.not12.lcssa = phi i8 [ 1, %3 ], [ 0, %.lr.ph.preheader ], [ %11, %._crit_edge.loopexit.loopexit ]
  ret i8 %.not12.lcssa
}

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, !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: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass