; LLVM IR from VastoLorde95/Competitive-Programming :: Codejam/2017/1B/B/B.ll/Z6updatecciRNSt7 (cxx1112basic_stringIcSt11char_traitsIcESaIcEEE)

; 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"

%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32), i8 noundef signext) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6updatecciRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(i8 noundef signext %0, i8 noundef signext %1, i32 noundef %2, ptr noundef nonnull align 8 dereferenceable(32) %3) #2 personality ptr @__gxx_personality_v0 {
  %5 = alloca i8, align 1
  %6 = alloca i8, align 1
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca %"class.std::__cxx11::basic_string", align 8
  %10 = alloca i8, align 1
  %11 = alloca i32, align 4
  %12 = alloca ptr, align 8
  %13 = alloca i32, align 4
  store i8 %0, ptr %5, align 1, !tbaa !5
  store i8 %1, ptr %6, align 1, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !8
  store ptr %3, ptr %8, align 8, !tbaa !10
  call void @llvm.lifetime.start.p0(i64 32, ptr %9) #3
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %9) #3
  call void @llvm.lifetime.start.p0(i64 1, ptr %10) #3
  store i8 1, ptr %10, align 1, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  store i32 0, ptr %11, align 4, !tbaa !8
  br label %14

14:                                               ; preds = %61, %4
  %15 = load i32, ptr %11, align 4, !tbaa !8
  %16 = sext i32 %15 to i64
  %17 = load ptr, ptr %8, align 8, !tbaa !10
  %18 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %17) #3
  %19 = icmp ult i64 %16, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  br label %64

21:                                               ; preds = %14
  %22 = load ptr, ptr %8, align 8, !tbaa !10
  %23 = load i32, ptr %11, align 4, !tbaa !8
  %24 = sext i32 %23 to i64
  %25 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %22, i64 noundef %24)
          to label %26 unwind label %55

26:                                               ; preds = %21
  %27 = load i8, ptr %25, align 1, !tbaa !5
  %28 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %9, i8 noundef signext %27)
          to label %29 unwind label %55

29:                                               ; preds = %26
  %30 = load ptr, ptr %8, align 8, !tbaa !10
  %31 = load i32, ptr %11, align 4, !tbaa !8
  %32 = sext i32 %31 to i64
  %33 = invoke noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %30, i64 noundef %32)
          to label %34 unwind label %55

34:                                               ; preds = %29
  %35 = load i8, ptr %33, align 1, !tbaa !5
  %36 = sext i8 %35 to i32
  %37 = load i8, ptr %5, align 1, !tbaa !5
  %38 = sext i8 %37 to i32
  %39 = icmp eq i32 %36, %38
  br i1 %39, label %40, label %60

40:                                               ; preds = %34
  %41 = load i8, ptr %10, align 1, !tbaa !12, !range !14, !noundef !15
  %42 = trunc i8 %41 to i1
  br i1 %42, label %43, label %60

43:                                               ; preds = %40
  br label %44

44:                                               ; preds = %54, %43
  %45 = load i32, ptr %7, align 4, !tbaa !8
  %46 = add nsw i32 %45, -1
  store i32 %46, ptr %7, align 4, !tbaa !8
  %47 = icmp ne i32 %45, 0
  br i1 %47, label %48, label %59

48:                                               ; preds = %44
  %49 = load i8, ptr %6, align 1, !tbaa !5
  %50 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %9, i8 noundef signext %49)
          to label %51 unwind label %55

51:                                               ; preds = %48
  %52 = load i8, ptr %5, align 1, !tbaa !5
  %53 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %9, i8 noundef signext %52)
          to label %54 unwind label %55

54:                                               ; preds = %51
  br label %44, !llvm.loop !16

55:                                               ; preds = %51, %48, %29, %26, %21
  %56 = landingpad { ptr, i32 }
          cleanup
  %57 = extractvalue { ptr, i32 } %56, 0
  store ptr %57, ptr %12, align 8
  %58 = extractvalue { ptr, i32 } %56, 1
  store i32 %58, ptr %13, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  br label %72

59:                                               ; preds = %44
  store i8 0, ptr %10, align 1, !tbaa !12
  br label %60

60:                                               ; preds = %59, %40, %34
  br label %61

61:                                               ; preds = %60
  %62 = load i32, ptr %11, align 4, !tbaa !8
  %63 = add nsw i32 %62, 1
  store i32 %63, ptr %11, align 4, !tbaa !8
  br label %14, !llvm.loop !18

64:                                               ; preds = %20
  %65 = load ptr, ptr %8, align 8, !tbaa !10
  %66 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_(ptr noundef nonnull align 8 dereferenceable(32) %65, ptr noundef nonnull align 8 dereferenceable(32) %9)
          to label %67 unwind label %68

67:                                               ; preds = %64
  call void @llvm.lifetime.end.p0(i64 1, ptr %10) #3
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %9) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr %9) #3
  ret void

68:                                               ; preds = %64
  %69 = landingpad { ptr, i32 }
          cleanup
  %70 = extractvalue { ptr, i32 } %69, 0
  store ptr %70, ptr %12, align 8
  %71 = extractvalue { ptr, i32 } %69, 1
  store i32 %71, ptr %13, align 4
  br label %72

72:                                               ; preds = %68, %55
  call void @llvm.lifetime.end.p0(i64 1, ptr %10) #3
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %9) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr %9) #3
  br label %73

73:                                               ; preds = %72
  %74 = load ptr, ptr %12, align 8
  %75 = load i32, ptr %13, align 4
  %76 = insertvalue { ptr, i32 } poison, ptr %74, 0
  %77 = insertvalue { ptr, i32 } %76, i32 %75, 1
  resume { ptr, i32 } %77
}

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

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !6, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"any pointer", !6, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"bool", !6, i64 0}
!14 = !{i8 0, i8 2}
!15 = !{}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}
!18 = distinct !{!18, !17}


; 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"

%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32), i8 noundef signext) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6updatecciRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(i8 noundef signext %0, i8 noundef signext %1, i32 noundef %2, ptr noundef nonnull align 8 dereferenceable(32) %3) local_unnamed_addr #2 personality ptr @__gxx_personality_v0 {
  %5 = alloca %"class.std::__cxx11::basic_string", align 8
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %5) #3
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #3
  %6 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %3) #3
  %.not26 = icmp eq i64 %6, 0
  br i1 %.not26, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.loopexit, %4
  %7 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSERKS4_(ptr noundef nonnull align 8 dereferenceable(32) %3, ptr noundef nonnull align 8 dereferenceable(32) %5)
          to label %22 unwind label %23

.lr.ph:                                           ; preds = %4, %.loopexit
  %indvars.iv = phi i64 [ %indvars.iv.next, %.loopexit ], [ 0, %4 ]
  %.01624 = phi i1 [ %.1, %.loopexit ], [ true, %4 ]
  %.01723 = phi i32 [ %.2, %.loopexit ], [ %2, %4 ]
  %8 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %3, i64 noundef %indvars.iv)
  %9 = load i8, ptr %8, align 1, !tbaa !5
  %10 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %5, i8 noundef signext %9)
          to label %11 unwind label %.loopexit.split-lp

11:                                               ; preds = %.lr.ph
  %12 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %3, i64 noundef %indvars.iv)
  %13 = load i8, ptr %12, align 1, !tbaa !5
  %14 = icmp eq i8 %13, %0
  %brmerge.not = select i1 %14, i1 %.01624, i1 false
  br i1 %brmerge.not, label %.preheader, label %.loopexit

.preheader:                                       ; preds = %11, %18
  %.118 = phi i32 [ %15, %18 ], [ %.01723, %11 ]
  %15 = add nsw i32 %.118, -1
  %.not = icmp eq i32 %.118, 0
  br i1 %.not, label %.loopexit, label %16

16:                                               ; preds = %.preheader
  %17 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %5, i8 noundef signext %1)
          to label %18 unwind label %.loopexit22

18:                                               ; preds = %16
  %19 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %5, i8 noundef signext %0)
          to label %.preheader unwind label %.loopexit22, !llvm.loop !8

.loopexit22:                                      ; preds = %16, %18
  %lpad.loopexit = landingpad { ptr, i32 }
          cleanup
  br label %25

.loopexit.split-lp:                               ; preds = %.lr.ph
  %lpad.loopexit.split-lp = landingpad { ptr, i32 }
          cleanup
  br label %25

.loopexit:                                        ; preds = %.preheader, %11
  %.2 = phi i32 [ %.01723, %11 ], [ -1, %.preheader ]
  %.1 = phi i1 [ %.01624, %11 ], [ false, %.preheader ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %20 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6lengthEv(ptr noundef nonnull align 8 dereferenceable(32) %3) #3
  %21 = icmp ugt i64 %20, %indvars.iv.next
  br i1 %21, label %.lr.ph, label %._crit_edge, !llvm.loop !10

22:                                               ; preds = %._crit_edge
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #3
  ret void

23:                                               ; preds = %._crit_edge
  %24 = landingpad { ptr, i32 }
          cleanup
  br label %25

25:                                               ; preds = %.loopexit22, %.loopexit.split-lp, %23
  %.pn = phi { ptr, i32 } [ %24, %23 ], [ %lpad.loopexit, %.loopexit22 ], [ %lpad.loopexit.split-lp, %.loopexit.split-lp ]
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %5) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %5) #3
  resume { ptr, i32 } %.pn
}

; 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: 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_traitsIcESaIcEEaSERKS4_(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #2 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}
!10 = distinct !{!10, !9}


; Effective O3 passes: AggressiveInstCombinePass,CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass