; LLVM IR from fritzsedlazeck/SURVIVOR :: src/simulator/Error_scanner.ll (Z8find_posSt6vectorI15differences_strSaIS0_EEi)

; 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.differences_str = type { i32, i16 }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorI15differences_strSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorI15differences_strSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z8find_posSt6vectorI15differences_strSaIS0_EEi(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 0, ptr %6, align 8, !tbaa !11
  br label %8

8:                                                ; preds = %24, %2
  %9 = load i64, ptr %6, align 8, !tbaa !11
  %10 = call noundef i64 @_ZNKSt6vectorI15differences_strSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %11 = icmp ult i64 %9, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %8
  store i32 2, ptr %7, align 4
  br label %27

13:                                               ; preds = %8
  %14 = load i64, ptr %6, align 8, !tbaa !11
  %15 = call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorI15differences_strSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %14) #2
  %16 = getelementptr inbounds %struct.differences_str, ptr %15, i32 0, i32 0
  %17 = load i32, ptr %16, align 4, !tbaa !13
  %18 = load i32, ptr %5, align 4, !tbaa !9
  %19 = icmp eq i32 %17, %18
  br i1 %19, label %20, label %23

20:                                               ; preds = %13
  %21 = load i64, ptr %6, align 8, !tbaa !11
  %22 = trunc i64 %21 to i32
  store i32 %22, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %27

23:                                               ; preds = %13
  br label %24

24:                                               ; preds = %23
  %25 = load i64, ptr %6, align 8, !tbaa !11
  %26 = add i64 %25, 1
  store i64 %26, ptr %6, align 8, !tbaa !11
  br label %8, !llvm.loop !16

27:                                               ; preds = %20, %12
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %28 = load i32, ptr %7, align 4
  switch i32 %28, label %32 [
    i32 2, label %29
    i32 1, label %30
  ]

29:                                               ; preds = %27
  store i32 -1, ptr %3, align 4
  br label %30

30:                                               ; preds = %29, %27
  %31 = load i32, ptr %3, align 4
  ret i32 %31

32:                                               ; preds = %27
  unreachable
}

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 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!14, !10, i64 0}
!14 = !{!"_ZTS15differences_str", !10, i64 0, !15, i64 4}
!15 = !{!"short", !7, i64 0}
!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: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorI15differences_strSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorI15differences_strSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z8find_posSt6vectorI15differences_strSaIS0_EEi(ptr noundef nonnull %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noundef i64 @_ZNKSt6vectorI15differences_strSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %.not10.not = icmp eq i64 %3, 0
  br i1 %.not10.not, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %2, %9
  %.0711 = phi i64 [ %10, %9 ], [ 0, %2 ]
  %4 = tail call noundef nonnull align 4 dereferenceable(8) ptr @_ZNSt6vectorI15differences_strSaIS0_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %.0711) #1
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %6 = icmp eq i32 %5, %1
  br i1 %6, label %7, label %9

7:                                                ; preds = %.lr.ph
  %8 = trunc i64 %.0711 to i32
  br label %.loopexit

9:                                                ; preds = %.lr.ph
  %10 = add nuw i64 %.0711, 1
  %11 = tail call noundef i64 @_ZNKSt6vectorI15differences_strSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %.not = icmp ult i64 %10, %11
  br i1 %.not, label %.lr.ph, label %.loopexit, !llvm.loop !11

.loopexit:                                        ; preds = %9, %2, %7
  %spec.select = phi i32 [ %8, %7 ], [ -1, %2 ], [ -1, %9 ]
  ret i32 %spec.select
}

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 = { 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, !7, i64 0}
!6 = !{!"_ZTS15differences_str", !7, i64 0, !10, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"short", !8, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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