; LLVM IR from SSBMTonberry/pocketlzma :: ref_spec/lzma1900/CPP/Common/MyString.ll (ZN7UStringC2EPKc)

; 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 @_ZN7UString11SetStartLenEj(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7UStringC2EPKc(ptr noundef nonnull align 8 dereferenceable(16) %0, ptr noundef %1) unnamed_addr #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 @_ZN7UString11SetStartLenEj(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
  store ptr %13, 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 %14

14:                                               ; preds = %30, %2
  %15 = load i32, ptr %7, align 4, !tbaa !9
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = icmp ult i32 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %33

19:                                               ; preds = %14
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = load i32, ptr %7, align 4, !tbaa !9
  %22 = zext i32 %21 to i64
  %23 = getelementptr inbounds i8, ptr %20, i64 %22
  %24 = load i8, ptr %23, align 1, !tbaa !13
  %25 = zext i8 %24 to i32
  %26 = load ptr, ptr %6, align 8, !tbaa !5
  %27 = load i32, ptr %7, align 4, !tbaa !9
  %28 = zext i32 %27 to i64
  %29 = getelementptr inbounds i32, ptr %26, i64 %28
  store i32 %25, ptr %29, align 4, !tbaa !14
  br label %30

30:                                               ; preds = %19
  %31 = load i32, ptr %7, align 4, !tbaa !9
  %32 = add i32 %31, 1
  store i32 %32, ptr %7, align 4, !tbaa !9
  br label %14, !llvm.loop !16

33:                                               ; preds = %18
  %34 = load ptr, ptr %6, align 8, !tbaa !5
  %35 = load i32, ptr %5, align 4, !tbaa !9
  %36 = zext i32 %35 to i64
  %37 = getelementptr inbounds i32, ptr %34, i64 %36
  store i32 0, ptr %37, align 4, !tbaa !14
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret void
}

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 = !{!7, !7, i64 0}
!14 = !{!15, !15, i64 0}
!15 = !{!"wchar_t", !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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z11MyStringLenPKc(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7UString11SetStartLenEj(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7UStringC2EPKc(ptr noundef nonnull align 8 dereferenceable(16) %0, ptr noundef %1) unnamed_addr #1 align 2 {
  %3 = tail call noundef i32 @_Z11MyStringLenPKc(ptr noundef %1)
  tail call void @_ZN7UString11SetStartLenEj(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %3)
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  %.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, 12
  br i1 %min.iters.check, label %.lr.ph.preheader16, label %vector.memcheck

.lr.ph.preheader16:                               ; 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.preheader16, %.lr.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %.lr.ph.prol ], [ %indvars.iv.ph, %.lr.ph.preheader16 ]
  %prol.iter = phi i64 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader16 ]
  %5 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.prol
  %6 = load i8, ptr %5, align 1, !tbaa !11
  %7 = zext i8 %6 to i32
  %8 = getelementptr inbounds i32, ptr %4, i64 %indvars.iv.prol
  store i32 %7, ptr %8, align 4, !tbaa !12
  %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 !14

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader16
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader16 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %9 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %10 = icmp ugt i64 %9, -4
  br i1 %10, label %._crit_edge, label %.lr.ph

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %11 = shl nuw nsw i64 %wide.trip.count, 2
  %scevgep = getelementptr i8, ptr %4, i64 %11
  %scevgep14 = getelementptr i8, ptr %1, i64 %wide.trip.count
  %bound0 = icmp ult ptr %4, %scevgep14
  %bound1 = icmp ugt ptr %scevgep, %1
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %.lr.ph.preheader16, 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 ]
  %12 = getelementptr inbounds i8, ptr %1, i64 %index
  %13 = getelementptr inbounds i8, ptr %12, i64 4
  %wide.load = load <4 x i8>, ptr %12, align 1, !tbaa !11, !alias.scope !16
  %wide.load15 = load <4 x i8>, ptr %13, align 1, !tbaa !11, !alias.scope !16
  %14 = zext <4 x i8> %wide.load to <4 x i32>
  %15 = zext <4 x i8> %wide.load15 to <4 x i32>
  %16 = getelementptr inbounds i32, ptr %4, i64 %index
  %17 = getelementptr inbounds i8, ptr %16, i64 16
  store <4 x i32> %14, ptr %16, align 4, !tbaa !12, !alias.scope !19, !noalias !16
  store <4 x i32> %15, ptr %17, align 4, !tbaa !12, !alias.scope !19, !noalias !16
  %index.next = add nuw i64 %index, 8
  %18 = icmp eq i64 %index.next, %n.vec
  br i1 %18, label %middle.block, label %vector.body, !llvm.loop !21

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.preheader16

._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 ]
  %19 = getelementptr inbounds i32, ptr %4, i64 %.pre-phi
  store i32 0, ptr %19, align 4, !tbaa !12
  ret void

.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 ]
  %20 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv
  %21 = load i8, ptr %20, align 1, !tbaa !11
  %22 = zext i8 %21 to i32
  %23 = getelementptr inbounds i32, ptr %4, i64 %indvars.iv
  store i32 %22, ptr %23, align 4, !tbaa !12
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %24 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.next
  %25 = load i8, ptr %24, align 1, !tbaa !11
  %26 = zext i8 %25 to i32
  %27 = getelementptr inbounds i32, ptr %4, i64 %indvars.iv.next
  store i32 %26, ptr %27, align 4, !tbaa !12
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %28 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.next.1
  %29 = load i8, ptr %28, align 1, !tbaa !11
  %30 = zext i8 %29 to i32
  %31 = getelementptr inbounds i32, ptr %4, i64 %indvars.iv.next.1
  store i32 %30, ptr %31, align 4, !tbaa !12
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %32 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.next.2
  %33 = load i8, ptr %32, align 1, !tbaa !11
  %34 = zext i8 %33 to i32
  %35 = getelementptr inbounds i32, ptr %4, i64 %indvars.iv.next.2
  store i32 %34, ptr %35, align 4, !tbaa !12
  %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 !25
}

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 = !{!8, !8, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"wchar_t", !8, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.unroll.disable"}
!16 = !{!17}
!17 = distinct !{!17, !18}
!18 = distinct !{!18, !"LVerDomain"}
!19 = !{!20}
!20 = distinct !{!20, !18}
!21 = distinct !{!21, !22, !23, !24}
!22 = !{!"llvm.loop.mustprogress"}
!23 = !{!"llvm.loop.isvectorized", i32 1}
!24 = !{!"llvm.loop.unroll.runtime.disable"}
!25 = distinct !{!25, !22, !23}


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