; LLVM IR from SSBMTonberry/pocketlzma :: ref_spec/lzma1900/C (XzIn)

; 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"

%struct.CXzs = type { i64, i64, ptr }
%struct.CXzStream = type { i16, i64, ptr, i64 }

; 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: nounwind uwtable
define dso_local i64 @Xzs_GetNumBlocks(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  store i64 0, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !11
  br label %5

5:                                                ; preds = %21, %1
  %6 = load i64, ptr %4, align 8, !tbaa !11
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.CXzs, ptr %7, i32 0, i32 0
  %9 = load i64, ptr %8, align 8, !tbaa !13
  %10 = icmp ult i64 %6, %9
  br i1 %10, label %11, label %24

11:                                               ; preds = %5
  %12 = load ptr, ptr %2, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.CXzs, ptr %12, i32 0, i32 2
  %14 = load ptr, ptr %13, align 8, !tbaa !15
  %15 = load i64, ptr %4, align 8, !tbaa !11
  %16 = getelementptr inbounds %struct.CXzStream, ptr %14, i64 %15
  %17 = getelementptr inbounds %struct.CXzStream, ptr %16, i32 0, i32 1
  %18 = load i64, ptr %17, align 8, !tbaa !16
  %19 = load i64, ptr %3, align 8, !tbaa !9
  %20 = add i64 %19, %18
  store i64 %20, ptr %3, align 8, !tbaa !9
  br label %21

21:                                               ; preds = %11
  %22 = load i64, ptr %4, align 8, !tbaa !11
  %23 = add i64 %22, 1
  store i64 %23, ptr %4, align 8, !tbaa !11
  br label %5, !llvm.loop !19

24:                                               ; preds = %5
  %25 = load i64, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret i64 %25
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 }

!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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!14, !12, i64 0}
!14 = !{!"", !12, i64 0, !12, i64 8, !6, i64 16}
!15 = !{!14, !6, i64 16}
!16 = !{!17, !12, i64 8}
!17 = !{!"", !18, i64 0, !12, i64 8, !6, i64 16, !10, i64 24}
!18 = !{!"short", !7, i64 0}
!19 = distinct !{!19, !20}
!20 = !{!"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"

%struct.CXzStream = type { i16, i64, ptr, i64 }

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local i64 @Xzs_GetNumBlocks(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load i64, ptr %0, align 8, !tbaa !5
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1
  %3 = getelementptr inbounds i8, ptr %0, i64 16
  %4 = load ptr, ptr %3, align 8, !tbaa !11
  %xtraiter = and i64 %2, 3
  %5 = icmp ult i64 %2, 4
  br i1 %5, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i64 %2, -4
  br label %6

6:                                                ; preds = %6, %.lr.ph.new
  %.08 = phi i64 [ 0, %.lr.ph.new ], [ %22, %6 ]
  %.067 = phi i64 [ 0, %.lr.ph.new ], [ %21, %6 ]
  %niter = phi i64 [ 0, %.lr.ph.new ], [ %niter.next.3, %6 ]
  %7 = getelementptr inbounds %struct.CXzStream, ptr %4, i64 %.08, i32 1
  %8 = load i64, ptr %7, align 8, !tbaa !12
  %9 = add i64 %8, %.067
  %10 = or disjoint i64 %.08, 1
  %11 = getelementptr inbounds %struct.CXzStream, ptr %4, i64 %10, i32 1
  %12 = load i64, ptr %11, align 8, !tbaa !12
  %13 = add i64 %12, %9
  %14 = or disjoint i64 %.08, 2
  %15 = getelementptr inbounds %struct.CXzStream, ptr %4, i64 %14, i32 1
  %16 = load i64, ptr %15, align 8, !tbaa !12
  %17 = add i64 %16, %13
  %18 = or disjoint i64 %.08, 3
  %19 = getelementptr inbounds %struct.CXzStream, ptr %4, i64 %18, i32 1
  %20 = load i64, ptr %19, align 8, !tbaa !12
  %21 = add i64 %20, %17
  %22 = add nuw i64 %.08, 4
  %niter.next.3 = add i64 %niter, 4
  %niter.ncmp.3 = icmp eq i64 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.loopexit.unr-lcssa, label %6, !llvm.loop !16

._crit_edge.loopexit.unr-lcssa:                   ; preds = %6, %.lr.ph
  %.lcssa.ph = phi i64 [ poison, %.lr.ph ], [ %21, %6 ]
  %.08.unr = phi i64 [ 0, %.lr.ph ], [ %22, %6 ]
  %.067.unr = phi i64 [ 0, %.lr.ph ], [ %21, %6 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.epil.preheader

.epil.preheader:                                  ; preds = %._crit_edge.loopexit.unr-lcssa, %.epil.preheader
  %.08.epil = phi i64 [ %26, %.epil.preheader ], [ %.08.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.067.epil = phi i64 [ %25, %.epil.preheader ], [ %.067.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.epil.preheader ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %23 = getelementptr inbounds %struct.CXzStream, ptr %4, i64 %.08.epil, i32 1
  %24 = load i64, ptr %23, align 8, !tbaa !12
  %25 = add i64 %24, %.067.epil
  %26 = add nuw i64 %.08.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.epil.preheader, !llvm.loop !18

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.epil.preheader, %1
  %.06.lcssa = phi i64 [ 0, %1 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %25, %.epil.preheader ]
  ret i64 %.06.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) 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 = !{!"", !7, i64 0, !7, i64 8, !10, i64 16}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 16}
!12 = !{!13, !7, i64 8}
!13 = !{!"", !14, i64 0, !7, i64 8, !10, i64 16, !15, i64 24}
!14 = !{!"short", !8, i64 0}
!15 = !{!"long long", !8, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}
!18 = distinct !{!18, !19}
!19 = !{!"llvm.loop.unroll.disable"}


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