; LLVM IR from philanc/luazen :: src/lzma (LzFind)

; 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"

; 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 void @MatchFinder_Normalize3(i32 noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store i64 %2, ptr %6, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  store i64 0, ptr %7, align 8, !tbaa !11
  br label %9

9:                                                ; preds = %31, %3
  %10 = load i64, ptr %7, align 8, !tbaa !11
  %11 = load i64, ptr %6, align 8, !tbaa !11
  %12 = icmp ult i64 %10, %11
  br i1 %12, label %13, label %34

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %14 = load ptr, ptr %5, align 8, !tbaa !9
  %15 = load i64, ptr %7, align 8, !tbaa !11
  %16 = getelementptr inbounds i32, ptr %14, i64 %15
  %17 = load i32, ptr %16, align 4, !tbaa !5
  store i32 %17, ptr %8, align 4, !tbaa !5
  %18 = load i32, ptr %8, align 4, !tbaa !5
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = icmp ule i32 %18, %19
  br i1 %20, label %21, label %22

21:                                               ; preds = %13
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %26

22:                                               ; preds = %13
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = load i32, ptr %8, align 4, !tbaa !5
  %25 = sub i32 %24, %23
  store i32 %25, ptr %8, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %22, %21
  %27 = load i32, ptr %8, align 4, !tbaa !5
  %28 = load ptr, ptr %5, align 8, !tbaa !9
  %29 = load i64, ptr %7, align 8, !tbaa !11
  %30 = getelementptr inbounds i32, ptr %28, i64 %29
  store i32 %27, ptr %30, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %31

31:                                               ; preds = %26
  %32 = load i64, ptr %7, align 8, !tbaa !11
  %33 = add i64 %32, 1
  store i64 %33, ptr %7, align 8, !tbaa !11
  br label %9, !llvm.loop !13

34:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret void
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @MatchFinder_Normalize3(i32 noundef %0, ptr nocapture noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %min.iters.check = icmp ult i64 %2, 8
  br i1 %min.iters.check, label %.lr.ph.preheader16, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %2, -8
  %broadcast.splatinsert = insertelement <4 x i32> poison, i32 %0, i64 0
  %broadcast.splat = shufflevector <4 x i32> %broadcast.splatinsert, <4 x i32> poison, <4 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %4 = getelementptr inbounds i32, ptr %1, i64 %index
  %5 = getelementptr inbounds i8, ptr %4, i64 16
  %wide.load = load <4 x i32>, ptr %4, align 4, !tbaa !5
  %wide.load15 = load <4 x i32>, ptr %5, align 4, !tbaa !5
  %6 = tail call <4 x i32> @llvm.usub.sat.v4i32(<4 x i32> %wide.load, <4 x i32> %broadcast.splat)
  %7 = tail call <4 x i32> @llvm.usub.sat.v4i32(<4 x i32> %wide.load15, <4 x i32> %broadcast.splat)
  store <4 x i32> %6, ptr %4, align 4, !tbaa !5
  store <4 x i32> %7, ptr %5, align 4, !tbaa !5
  %index.next = add nuw i64 %index, 8
  %8 = icmp eq i64 %index.next, %n.vec
  br i1 %8, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %2
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader16

.lr.ph.preheader16:                               ; preds = %middle.block, %.lr.ph.preheader
  %.01114.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader16, %.lr.ph
  %.01114 = phi i64 [ %11, %.lr.ph ], [ %.01114.ph, %.lr.ph.preheader16 ]
  %9 = getelementptr inbounds i32, ptr %1, i64 %.01114
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %.0 = tail call i32 @llvm.usub.sat.i32(i32 %10, i32 %0)
  store i32 %.0, ptr %9, align 4, !tbaa !5
  %11 = add nuw i64 %.01114, 1
  %exitcond.not = icmp eq i64 %11, %2
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %3
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.usub.sat.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <4 x i32> @llvm.usub.sat.v4i32(<4 x i32>, <4 x i32>) #1

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}


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