; LLVM IR from SSBMTonberry/pocketlzma :: ref_spec/lzma1900/CPP/Common/MyString.ll (ZN7UStringpLEPKc)

; 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.UString = type { ptr, i32, i32 }

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

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z11MyStringLenPKc(ptr noundef) #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7UString4GrowEj(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZN7UStringpLEPKc(ptr noundef nonnull align 8 dereferenceable(16) %0, ptr noundef %1) #2 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %8 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = call noundef i32 @_Z11MyStringLenPKc(ptr noundef %9)
  store i32 %10, ptr %5, align 4, !tbaa !9
  %11 = load i32, ptr %5, align 4, !tbaa !9
  call void @_ZN7UString4GrowEj(ptr noundef nonnull align 8 dereferenceable(16) %8, i32 noundef %11)
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %12 = getelementptr inbounds %class.UString, ptr %8, i32 0, i32 0
  %13 = load ptr, ptr %12, align 8, !tbaa !11
  %14 = getelementptr inbounds %class.UString, ptr %8, i32 0, i32 1
  %15 = load i32, ptr %14, align 8, !tbaa !13
  %16 = zext i32 %15 to i64
  %17 = getelementptr inbounds i32, ptr %13, i64 %16
  store ptr %17, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %34, %2
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = load i32, ptr %5, align 4, !tbaa !9
  %21 = icmp ult i32 %19, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %37

23:                                               ; preds = %18
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = load i32, ptr %7, align 4, !tbaa !9
  %26 = zext i32 %25 to i64
  %27 = getelementptr inbounds i8, ptr %24, i64 %26
  %28 = load i8, ptr %27, align 1, !tbaa !14
  %29 = zext i8 %28 to i32
  %30 = load ptr, ptr %6, align 8, !tbaa !5
  %31 = load i32, ptr %7, align 4, !tbaa !9
  %32 = zext i32 %31 to i64
  %33 = getelementptr inbounds i32, ptr %30, i64 %32
  store i32 %29, ptr %33, align 4, !tbaa !15
  br label %34

34:                                               ; preds = %23
  %35 = load i32, ptr %7, align 4, !tbaa !9
  %36 = add i32 %35, 1
  store i32 %36, ptr %7, align 4, !tbaa !9
  br label %18, !llvm.loop !17

37:                                               ; preds = %22
  %38 = load ptr, ptr %6, align 8, !tbaa !5
  %39 = load i32, ptr %5, align 4, !tbaa !9
  %40 = zext i32 %39 to i64
  %41 = getelementptr inbounds i32, ptr %38, i64 %40
  store i32 0, ptr %41, align 4, !tbaa !15
  %42 = load i32, ptr %5, align 4, !tbaa !9
  %43 = getelementptr inbounds %class.UString, ptr %8, i32 0, i32 1
  %44 = load i32, ptr %43, align 8, !tbaa !13
  %45 = add i32 %44, %42
  store i32 %45, ptr %43, align 8, !tbaa !13
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret ptr %8
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 = !{!"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, !6, i64 0}
!12 = !{!"_ZTS7UString", !6, i64 0, !10, i64 8, !10, i64 12}
!13 = !{!12, !10, i64 8}
!14 = !{!7, !7, i64 0}
!15 = !{!16, !16, i64 0}
!16 = !{!"wchar_t", !7, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z11MyStringLenPKc(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7UString4GrowEj(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZN7UStringpLEPKc(ptr noundef nonnull returned align 8 dereferenceable(16) %0, ptr noundef %1) local_unnamed_addr #1 align 2 {
  %3 = tail call noundef i32 @_Z11MyStringLenPKc(ptr noundef %1)
  tail call void @_ZN7UString4GrowEj(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %3)
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load i32, ptr %5, align 8, !tbaa !11
  %7 = zext i32 %6 to i64
  %8 = getelementptr i32, ptr %4, i64 %7
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = zext i32 %3 to i64
  %min.iters.check = icmp ult i32 %3, 16
  br i1 %min.iters.check, label %.lr.ph.preheader17, label %vector.memcheck

.lr.ph.preheader17:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader17, %.lr.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %.lr.ph.prol ], [ %indvars.iv.ph, %.lr.ph.preheader17 ]
  %prol.iter = phi i64 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader17 ]
  %9 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.prol
  %10 = load i8, ptr %9, align 1, !tbaa !12
  %11 = zext i8 %10 to i32
  %12 = getelementptr inbounds i32, ptr %8, i64 %indvars.iv.prol
  store i32 %11, ptr %12, align 4, !tbaa !13
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.prol, 1
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol, !llvm.loop !15

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader17
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader17 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %13 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %14 = icmp ugt i64 %13, -4
  br i1 %14, label %._crit_edge, label %.lr.ph

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %15 = add nuw nsw i64 %wide.trip.count, %7
  %16 = shl nuw nsw i64 %15, 2
  %scevgep = getelementptr i8, ptr %4, i64 %16
  %scevgep15 = getelementptr i8, ptr %1, i64 %wide.trip.count
  %bound0 = icmp ult ptr %8, %scevgep15
  %bound1 = icmp ugt ptr %scevgep, %1
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %.lr.ph.preheader17, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %wide.trip.count, 4294967288
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %17 = getelementptr inbounds i8, ptr %1, i64 %index
  %18 = getelementptr inbounds i8, ptr %17, i64 4
  %wide.load = load <4 x i8>, ptr %17, align 1, !tbaa !12, !alias.scope !17
  %wide.load16 = load <4 x i8>, ptr %18, align 1, !tbaa !12, !alias.scope !17
  %19 = zext <4 x i8> %wide.load to <4 x i32>
  %20 = zext <4 x i8> %wide.load16 to <4 x i32>
  %21 = getelementptr inbounds i32, ptr %8, i64 %index
  %22 = getelementptr inbounds i8, ptr %21, i64 16
  store <4 x i32> %19, ptr %21, align 4, !tbaa !13, !alias.scope !20, !noalias !17
  store <4 x i32> %20, ptr %22, align 4, !tbaa !13, !alias.scope !20, !noalias !17
  %index.next = add nuw i64 %index, 8
  %23 = icmp eq i64 %index.next, %n.vec
  br i1 %23, label %middle.block, label %vector.body, !llvm.loop !22

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader17

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %2
  %.pre-phi = phi i64 [ 0, %2 ], [ %wide.trip.count, %middle.block ], [ %wide.trip.count, %.lr.ph ], [ %wide.trip.count, %.lr.ph.prol.loopexit ]
  %24 = getelementptr inbounds i32, ptr %8, i64 %.pre-phi
  store i32 0, ptr %24, align 4, !tbaa !13
  %25 = add i32 %6, %3
  store i32 %25, ptr %5, align 8, !tbaa !11
  ret ptr %0

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %26 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv
  %27 = load i8, ptr %26, align 1, !tbaa !12
  %28 = zext i8 %27 to i32
  %29 = getelementptr inbounds i32, ptr %8, i64 %indvars.iv
  store i32 %28, ptr %29, align 4, !tbaa !13
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %30 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.next
  %31 = load i8, ptr %30, align 1, !tbaa !12
  %32 = zext i8 %31 to i32
  %33 = getelementptr inbounds i32, ptr %8, i64 %indvars.iv.next
  store i32 %32, ptr %33, align 4, !tbaa !13
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %34 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.next.1
  %35 = load i8, ptr %34, align 1, !tbaa !12
  %36 = zext i8 %35 to i32
  %37 = getelementptr inbounds i32, ptr %8, i64 %indvars.iv.next.1
  store i32 %36, ptr %37, align 4, !tbaa !13
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %38 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.next.2
  %39 = load i8, ptr %38, align 1, !tbaa !12
  %40 = zext i8 %39 to i32
  %41 = getelementptr inbounds i32, ptr %8, i64 %indvars.iv.next.2
  store i32 %40, ptr %41, align 4, !tbaa !13
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %wide.trip.count
  br i1 %exitcond.not.3, label %._crit_edge, label %.lr.ph, !llvm.loop !26
}

attributes #0 = { inlinehint 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 = { 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" }

!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 = !{!"_ZTS7UString", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!8, !8, i64 0}
!13 = !{!14, !14, i64 0}
!14 = !{!"wchar_t", !8, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.unroll.disable"}
!17 = !{!18}
!18 = distinct !{!18, !19}
!19 = distinct !{!19, !"LVerDomain"}
!20 = !{!21}
!21 = distinct !{!21, !19}
!22 = distinct !{!22, !23, !24, !25}
!23 = !{!"llvm.loop.mustprogress"}
!24 = !{!"llvm.loop.isvectorized", i32 1}
!25 = !{!"llvm.loop.unroll.runtime.disable"}
!26 = distinct !{!26, !23, !24}


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