; 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.CXzStream = type { i16, i64, ptr, i64 }
%struct.CXzBlockSizes = type { i64, 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 @Xz_GetUnpackSize(ptr noundef %0) #1 {
  %2 = alloca i64, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 0, ptr %5, align 8, !tbaa !11
  br label %8

8:                                                ; preds = %33, %1
  %9 = load i64, ptr %5, align 8, !tbaa !11
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.CXzStream, ptr %10, i32 0, i32 1
  %12 = load i64, ptr %11, align 8, !tbaa !13
  %13 = icmp ult i64 %9, %12
  br i1 %13, label %14, label %36

14:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %15 = load i64, ptr %4, align 8, !tbaa !9
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.CXzStream, ptr %16, i32 0, i32 2
  %18 = load ptr, ptr %17, align 8, !tbaa !16
  %19 = load i64, ptr %5, align 8, !tbaa !11
  %20 = getelementptr inbounds %struct.CXzBlockSizes, ptr %18, i64 %19
  %21 = getelementptr inbounds %struct.CXzBlockSizes, ptr %20, i32 0, i32 0
  %22 = load i64, ptr %21, align 8, !tbaa !17
  %23 = add i64 %15, %22
  store i64 %23, ptr %6, align 8, !tbaa !9
  %24 = load i64, ptr %6, align 8, !tbaa !9
  %25 = load i64, ptr %4, align 8, !tbaa !9
  %26 = icmp ult i64 %24, %25
  br i1 %26, label %27, label %28

27:                                               ; preds = %14
  store i64 -1, ptr %2, align 8
  store i32 1, ptr %7, align 4
  br label %30

28:                                               ; preds = %14
  %29 = load i64, ptr %6, align 8, !tbaa !9
  store i64 %29, ptr %4, align 8, !tbaa !9
  store i32 0, ptr %7, align 4
  br label %30

30:                                               ; preds = %28, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %31 = load i32, ptr %7, align 4
  switch i32 %31, label %38 [
    i32 0, label %32
  ]

32:                                               ; preds = %30
  br label %33

33:                                               ; preds = %32
  %34 = load i64, ptr %5, align 8, !tbaa !11
  %35 = add i64 %34, 1
  store i64 %35, ptr %5, align 8, !tbaa !11
  br label %8, !llvm.loop !19

36:                                               ; preds = %8
  %37 = load i64, ptr %4, align 8, !tbaa !9
  store i64 %37, ptr %2, align 8
  store i32 1, ptr %7, align 4
  br label %38

38:                                               ; preds = %36, %30
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %39 = load i64, ptr %2, align 8
  ret i64 %39
}

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 8}
!14 = !{!"", !15, i64 0, !12, i64 8, !6, i64 16, !10, i64 24}
!15 = !{!"short", !7, i64 0}
!16 = !{!14, !6, i64 16}
!17 = !{!18, !10, i64 0}
!18 = !{!"", !10, i64 0, !10, i64 8}
!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.CXzBlockSizes = type { i64, i64 }

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local i64 @Xz_GetUnpackSize(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = load i64, ptr %2, align 8, !tbaa !5
  %.not20 = icmp eq i64 %3, 0
  br i1 %.not20, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1
  %4 = getelementptr inbounds i8, ptr %0, i64 16
  %5 = load ptr, ptr %4, align 8, !tbaa !13
  br label %8

6:                                                ; preds = %8
  %7 = add nuw i64 %.01217, 1
  %exitcond.not = icmp eq i64 %7, %3
  br i1 %exitcond.not, label %._crit_edge, label %8, !llvm.loop !14

8:                                                ; preds = %.lr.ph, %6
  %.01217 = phi i64 [ 0, %.lr.ph ], [ %7, %6 ]
  %.01316 = phi i64 [ 0, %.lr.ph ], [ %11, %6 ]
  %9 = getelementptr inbounds %struct.CXzBlockSizes, ptr %5, i64 %.01217
  %10 = load i64, ptr %9, align 8, !tbaa !16
  %11 = add i64 %10, %.01316
  %.not = icmp ult i64 %11, %.01316
  br i1 %.not, label %._crit_edge, label %6

._crit_edge:                                      ; preds = %8, %6, %1
  %.2 = phi i64 [ 0, %1 ], [ %11, %6 ], [ -1, %8 ]
  ret i64 %.2
}

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, !10, i64 8}
!6 = !{!"", !7, i64 0, !10, i64 8, !11, i64 16, !12, i64 24}
!7 = !{!"short", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!"long long", !8, i64 0}
!13 = !{!6, !11, i64 16}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}
!16 = !{!17, !12, i64 0}
!17 = !{!"", !12, i64 0, !12, i64 8}


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