; LLVM IR from Mohammed-Shoaib/Coding-Problems :: HackerRank/Algorithms/Easy (E0054)

; 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 uwtable
define dso_local noundef i32 @_Z14makingAnagramsNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES4_(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 0, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  %9 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #4
  %10 = sub i64 %9, 1
  %11 = trunc i64 %10 to i32
  store i32 %11, ptr %7, align 4, !tbaa !9
  br label %12

12:                                               ; preds = %34, %2
  %13 = load i32, ptr %7, align 4, !tbaa !9
  %14 = icmp sge i32 %13, 0
  br i1 %14, label %16, label %15

15:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  br label %37

16:                                               ; preds = %12
  %17 = load i32, ptr %7, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %18)
  %20 = load i8, ptr %19, align 1, !tbaa !11
  %21 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4findEcm(ptr noundef nonnull align 8 dereferenceable(32) %1, i8 noundef signext %20, i64 noundef 0) #4
  store i64 %21, ptr %5, align 8, !tbaa !12
  %22 = load i64, ptr %5, align 8, !tbaa !12
  %23 = icmp eq i64 %22, -1
  br i1 %23, label %24, label %27

24:                                               ; preds = %16
  %25 = load i32, ptr %6, align 4, !tbaa !9
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr %6, align 4, !tbaa !9
  br label %30

27:                                               ; preds = %16
  %28 = load i64, ptr %5, align 8, !tbaa !12
  %29 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %28, i64 noundef 1)
  br label %30

30:                                               ; preds = %27, %24
  %31 = load i32, ptr %7, align 4, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %32, i64 noundef 1)
  br label %34

34:                                               ; preds = %30
  %35 = load i32, ptr %7, align 4, !tbaa !9
  %36 = add nsw i32 %35, -1
  store i32 %36, ptr %7, align 4, !tbaa !9
  br label %12, !llvm.loop !14

37:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  %38 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #4
  %39 = sub i64 %38, 1
  %40 = trunc i64 %39 to i32
  store i32 %40, ptr %8, align 4, !tbaa !9
  br label %41

41:                                               ; preds = %63, %37
  %42 = load i32, ptr %8, align 4, !tbaa !9
  %43 = icmp sge i32 %42, 0
  br i1 %43, label %45, label %44

44:                                               ; preds = %41
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %66

45:                                               ; preds = %41
  %46 = load i32, ptr %8, align 4, !tbaa !9
  %47 = sext i32 %46 to i64
  %48 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %47)
  %49 = load i8, ptr %48, align 1, !tbaa !11
  %50 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4findEcm(ptr noundef nonnull align 8 dereferenceable(32) %0, i8 noundef signext %49, i64 noundef 0) #4
  store i64 %50, ptr %5, align 8, !tbaa !12
  %51 = load i64, ptr %5, align 8, !tbaa !12
  %52 = icmp eq i64 %51, -1
  br i1 %52, label %53, label %56

53:                                               ; preds = %45
  %54 = load i32, ptr %6, align 4, !tbaa !9
  %55 = add nsw i32 %54, 1
  store i32 %55, ptr %6, align 4, !tbaa !9
  br label %59

56:                                               ; preds = %45
  %57 = load i64, ptr %5, align 8, !tbaa !12
  %58 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %57, i64 noundef 1)
  br label %59

59:                                               ; preds = %56, %53
  %60 = load i32, ptr %8, align 4, !tbaa !9
  %61 = sext i32 %60 to i64
  %62 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %61, i64 noundef 1)
  br label %63

63:                                               ; preds = %59
  %64 = load i32, ptr %8, align 4, !tbaa !9
  %65 = add nsw i32 %64, -1
  store i32 %65, ptr %8, align 4, !tbaa !9
  br label %41, !llvm.loop !16

66:                                               ; preds = %44
  %67 = load i32, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  ret i32 %67
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

; Function Attrs: nounwind
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4findEcm(ptr noundef nonnull align 8 dereferenceable(32), i8 noundef signext, i64 noundef) #3

; 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) #2 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef, i64 noundef) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { nounwind "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 #4 = { 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 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"long", !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}
!16 = distinct !{!16, !15}


; 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 uwtable
define dso_local noundef i32 @_Z14makingAnagramsNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES4_(ptr noundef nonnull %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  %4 = trunc i64 %3 to i32
  %.01519 = add i32 %4, -1
  %5 = icmp sgt i32 %.01519, -1
  br i1 %5, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %6 = zext nneg i32 %.01519 to i64
  br label %.lr.ph

._crit_edge:                                      ; preds = %19, %2
  %.016.lcssa = phi i32 [ 0, %2 ], [ %.1, %19 ]
  %7 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %1) #3
  %8 = trunc i64 %7 to i32
  %.022 = add i32 %8, -1
  %9 = icmp sgt i32 %.022, -1
  br i1 %9, label %.lr.ph26.preheader, label %._crit_edge27

.lr.ph26.preheader:                               ; preds = %._crit_edge
  %10 = zext nneg i32 %.022 to i64
  br label %.lr.ph26

.lr.ph:                                           ; preds = %.lr.ph.preheader, %19
  %indvars.iv = phi i64 [ %6, %.lr.ph.preheader ], [ %indvars.iv.next, %19 ]
  %.01620 = phi i32 [ 0, %.lr.ph.preheader ], [ %.1, %19 ]
  %11 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %indvars.iv)
  %12 = load i8, ptr %11, align 1, !tbaa !5
  %13 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4findEcm(ptr noundef nonnull align 8 dereferenceable(32) %1, i8 noundef signext %12, i64 noundef 0) #3
  %14 = icmp eq i64 %13, -1
  br i1 %14, label %15, label %17

15:                                               ; preds = %.lr.ph
  %16 = add nsw i32 %.01620, 1
  br label %19

17:                                               ; preds = %.lr.ph
  %18 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %13, i64 noundef 1)
  br label %19

19:                                               ; preds = %17, %15
  %.1 = phi i32 [ %16, %15 ], [ %.01620, %17 ]
  %20 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %indvars.iv, i64 noundef 1)
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %21 = icmp sgt i64 %indvars.iv, 0
  br i1 %21, label %.lr.ph, label %._crit_edge, !llvm.loop !8

._crit_edge27:                                    ; preds = %30, %._crit_edge
  %.2.lcssa = phi i32 [ %.016.lcssa, %._crit_edge ], [ %.3, %30 ]
  ret i32 %.2.lcssa

.lr.ph26:                                         ; preds = %.lr.ph26.preheader, %30
  %indvars.iv30 = phi i64 [ %10, %.lr.ph26.preheader ], [ %indvars.iv.next31, %30 ]
  %.223 = phi i32 [ %.016.lcssa, %.lr.ph26.preheader ], [ %.3, %30 ]
  %22 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %indvars.iv30)
  %23 = load i8, ptr %22, align 1, !tbaa !5
  %24 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4findEcm(ptr noundef nonnull align 8 dereferenceable(32) %0, i8 noundef signext %23, i64 noundef 0) #3
  %25 = icmp eq i64 %24, -1
  br i1 %25, label %26, label %28

26:                                               ; preds = %.lr.ph26
  %27 = add nsw i32 %.223, 1
  br label %30

28:                                               ; preds = %.lr.ph26
  %29 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %24, i64 noundef 1)
  br label %30

30:                                               ; preds = %28, %26
  %.3 = phi i32 [ %27, %26 ], [ %.223, %28 ]
  %31 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32) %1, i64 noundef %indvars.iv30, i64 noundef 1)
  %indvars.iv.next31 = add nsw i64 %indvars.iv30, -1
  %32 = icmp sgt i64 %indvars.iv30, 0
  br i1 %32, label %.lr.ph26, label %._crit_edge27, !llvm.loop !10
}

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #1 align 2

; Function Attrs: nounwind
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4findEcm(ptr noundef nonnull align 8 dereferenceable(32), i8 noundef signext, i64 noundef) local_unnamed_addr #2

; 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 #1 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5eraseEmm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef, i64 noundef) local_unnamed_addr #0 align 2

attributes #0 = { 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 #1 = { 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 #2 = { nounwind "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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}
!10 = distinct !{!10, !9}


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