; LLVM IR from codemistic/Data-Structures-and-Algorithms :: Hashtable (Palindrome-Substring-Queries)

; 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
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), 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 uwtable
define dso_local void @_Z17computePrefixHashNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEiPyS5_(ptr noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef %3) #2 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  store ptr %3, ptr %8, align 8, !tbaa !5
  %10 = load ptr, ptr %7, align 8, !tbaa !5
  %11 = getelementptr inbounds i64, ptr %10, i64 0
  store i64 0, ptr %11, align 8, !tbaa !11
  %12 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef 0)
  %13 = load i8, ptr %12, align 1, !tbaa !13
  %14 = sext i8 %13 to i64
  %15 = load ptr, ptr %7, align 8, !tbaa !5
  %16 = getelementptr inbounds i64, ptr %15, i64 1
  store i64 %14, ptr %16, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i32 2, ptr %9, align 4, !tbaa !9
  br label %17

17:                                               ; preds = %53, %4
  %18 = load i32, ptr %9, align 4, !tbaa !9
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = icmp sle i32 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %56

22:                                               ; preds = %17
  %23 = load ptr, ptr %7, align 8, !tbaa !5
  %24 = load i32, ptr %9, align 4, !tbaa !9
  %25 = sub nsw i32 %24, 1
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds i64, ptr %23, i64 %26
  %28 = load i64, ptr %27, align 8, !tbaa !11
  %29 = urem i64 %28, 1000000007
  %30 = load i32, ptr %9, align 4, !tbaa !9
  %31 = sub nsw i32 %30, 1
  %32 = sext i32 %31 to i64
  %33 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %32)
  %34 = load i8, ptr %33, align 1, !tbaa !13
  %35 = sext i8 %34 to i32
  %36 = srem i32 %35, 1000000007
  %37 = sext i32 %36 to i64
  %38 = load ptr, ptr %8, align 8, !tbaa !5
  %39 = load i32, ptr %9, align 4, !tbaa !9
  %40 = sub nsw i32 %39, 1
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds i64, ptr %38, i64 %41
  %43 = load i64, ptr %42, align 8, !tbaa !11
  %44 = mul i64 %37, %43
  %45 = urem i64 %44, 1000000007
  %46 = urem i64 %45, 1000000007
  %47 = add i64 %29, %46
  %48 = urem i64 %47, 1000000007
  %49 = load ptr, ptr %7, align 8, !tbaa !5
  %50 = load i32, ptr %9, align 4, !tbaa !9
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds i64, ptr %49, i64 %51
  store i64 %48, ptr %52, align 8, !tbaa !11
  br label %53

53:                                               ; preds = %22
  %54 = load i32, ptr %9, align 4, !tbaa !9
  %55 = add nsw i32 %54, 1
  store i32 %55, ptr %9, align 4, !tbaa !9
  br label %17, !llvm.loop !14

56:                                               ; preds = %21
  ret void
}

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 = { mustprogress 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 #3 = { 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 long", !7, i64 0}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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 noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z17computePrefixHashNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEiPyS5_(ptr noundef nonnull %0, i32 noundef %1, ptr nocapture noundef writeonly %2, ptr nocapture noundef readonly %3) local_unnamed_addr #0 {
  store i64 0, ptr %2, align 8, !tbaa !5
  %5 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef 0)
  %6 = load i8, ptr %5, align 1, !tbaa !9
  %7 = sext i8 %6 to i64
  %8 = getelementptr inbounds i8, ptr %2, i64 8
  store i64 %7, ptr %8, align 8, !tbaa !5
  %.not11 = icmp slt i32 %1, 2
  br i1 %.not11, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %4
  %9 = add nuw i32 %1, 1
  %wide.trip.count = zext i32 %9 to i64
  br label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %4
  ret void

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %10 = phi i64 [ %7, %.lr.ph.preheader ], [ %21, %.lr.ph ]
  %indvars.iv = phi i64 [ 2, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %11 = add nsw i64 %indvars.iv, -1
  %12 = urem i64 %10, 1000000007
  %13 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %11)
  %14 = load i8, ptr %13, align 1, !tbaa !9
  %15 = sext i8 %14 to i64
  %16 = getelementptr inbounds i64, ptr %3, i64 %11
  %17 = load i64, ptr %16, align 8, !tbaa !5
  %18 = mul i64 %17, %15
  %19 = urem i64 %18, 1000000007
  %20 = add nuw nsw i64 %19, %12
  %.frozen = freeze i64 %20
  %.urem = add i64 %.frozen, -1000000007
  %.cmp = icmp ult i64 %.frozen, 1000000007
  %21 = select i1 %.cmp, i64 %.frozen, i64 %.urem
  %22 = getelementptr inbounds i64, ptr %2, i64 %indvars.iv
  store i64 %21, ptr %22, align 8, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !10
}

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" }

!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++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


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