; LLVM IR from intel/pailliercryptolib :: module/heqat/heqat/misc/utils.ll (Z11strlen_safePKcm)

; 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: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z11strlen_safePKcm(ptr noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = icmp eq ptr null, %8
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  store i64 0, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %38

11:                                               ; preds = %2
  %12 = load i64, ptr %5, align 8, !tbaa !9
  %13 = icmp eq i64 0, %12
  br i1 %13, label %14, label %15

14:                                               ; preds = %11
  store i64 0, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %38

15:                                               ; preds = %11
  %16 = load i64, ptr %5, align 8, !tbaa !9
  %17 = icmp ugt i64 %16, 4096
  br i1 %17, label %18, label %19

18:                                               ; preds = %15
  store i64 0, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %38

19:                                               ; preds = %15
  store i64 0, ptr %6, align 8, !tbaa !9
  br label %20

20:                                               ; preds = %29, %19
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = load i8, ptr %21, align 1, !tbaa !11
  %23 = icmp ne i8 %22, 0
  br i1 %23, label %24, label %27

24:                                               ; preds = %20
  %25 = load i64, ptr %5, align 8, !tbaa !9
  %26 = icmp ne i64 %25, 0
  br label %27

27:                                               ; preds = %24, %20
  %28 = phi i1 [ false, %20 ], [ %26, %24 ]
  br i1 %28, label %29, label %36

29:                                               ; preds = %27
  %30 = load i64, ptr %6, align 8, !tbaa !9
  %31 = add i64 %30, 1
  store i64 %31, ptr %6, align 8, !tbaa !9
  %32 = load i64, ptr %5, align 8, !tbaa !9
  %33 = add i64 %32, -1
  store i64 %33, ptr %5, align 8, !tbaa !9
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = getelementptr inbounds i8, ptr %34, i32 1
  store ptr %35, ptr %4, align 8, !tbaa !5
  br label %20, !llvm.loop !12

36:                                               ; preds = %27
  %37 = load i64, ptr %6, align 8, !tbaa !9
  store i64 %37, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %38

38:                                               ; preds = %36, %18, %14, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %39 = load i64, ptr %3, align 8
  ret i64 %39
}

; 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 = { mustprogress 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !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: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i64 @_Z11strlen_safePKcm(ptr noundef readonly %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  %4 = add i64 %1, -4097
  %5 = icmp ult i64 %4, -4096
  %or.cond14 = or i1 %3, %5
  br i1 %or.cond14, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %2
  %6 = load i8, ptr %0, align 1, !tbaa !5
  %.not = icmp eq i8 %6, 0
  br i1 %.not, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %.017 = phi i64 [ %7, %.lr.ph ], [ 0, %.preheader ]
  %.0916 = phi i64 [ %8, %.lr.ph ], [ %1, %.preheader ]
  %.01015 = phi ptr [ %9, %.lr.ph ], [ %0, %.preheader ]
  %7 = add nuw nsw i64 %.017, 1
  %8 = add nsw i64 %.0916, -1
  %9 = getelementptr inbounds i8, ptr %.01015, i64 1
  %10 = load i8, ptr %9, align 1, !tbaa !5
  %11 = icmp ne i8 %10, 0
  %12 = icmp ne i64 %8, 0
  %13 = select i1 %11, i1 %12, i1 false
  br i1 %13, label %.lr.ph, label %.loopexit, !llvm.loop !8

.loopexit:                                        ; preds = %.lr.ph, %.preheader, %2
  %.011 = phi i64 [ 0, %2 ], [ 0, %.preheader ], [ %7, %.lr.ph ]
  ret i64 %.011
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn 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++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass