; 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"

%struct._CMatchFinder = type { ptr, i32, i32, i32, i32, i32, i32, i8, i8, i8, i8, i32, ptr, ptr, i32, i32, ptr, ptr, i32, i32, i32, i32, i64, i32, i32, i32, i32, [256 x i32], 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 void @MatchFinder_Init_LowHash(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct._CMatchFinder, ptr %6, i32 0, i32 12
  %8 = load ptr, ptr %7, align 8, !tbaa !9
  store ptr %8, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct._CMatchFinder, ptr %9, i32 0, i32 24
  %11 = load i32, ptr %10, align 4, !tbaa !14
  %12 = zext i32 %11 to i64
  store i64 %12, ptr %5, align 8, !tbaa !15
  store i64 0, ptr %3, align 8, !tbaa !15
  br label %13

13:                                               ; preds = %21, %1
  %14 = load i64, ptr %3, align 8, !tbaa !15
  %15 = load i64, ptr %5, align 8, !tbaa !15
  %16 = icmp ult i64 %14, %15
  br i1 %16, label %17, label %24

17:                                               ; preds = %13
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = load i64, ptr %3, align 8, !tbaa !15
  %20 = getelementptr inbounds i32, ptr %18, i64 %19
  store i32 0, ptr %20, align 4, !tbaa !16
  br label %21

21:                                               ; preds = %17
  %22 = load i64, ptr %3, align 8, !tbaa !15
  %23 = add i64 %22, 1
  store i64 %23, ptr %3, align 8, !tbaa !15
  br label %13, !llvm.loop !17

24:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 40}
!10 = !{!"_CMatchFinder", !6, i64 0, !11, i64 8, !11, i64 12, !11, i64 16, !11, i64 20, !11, i64 24, !11, i64 28, !7, i64 32, !7, i64 33, !7, i64 34, !7, i64 35, !11, i64 36, !6, i64 40, !6, i64 48, !11, i64 56, !11, i64 60, !6, i64 64, !6, i64 72, !11, i64 80, !11, i64 84, !11, i64 88, !11, i64 92, !12, i64 96, !11, i64 104, !11, i64 108, !11, i64 112, !11, i64 116, !7, i64 120, !12, i64 1144, !13, i64 1152}
!11 = !{!"int", !7, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!"long long", !7, i64 0}
!14 = !{!10, !11, i64 108}
!15 = !{!12, !12, i64 0}
!16 = !{!11, !11, 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: mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @MatchFinder_Init_LowHash(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 108
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %1
  %4 = zext i32 %3 to i64
  %5 = getelementptr inbounds i8, ptr %0, i64 40
  %6 = load ptr, ptr %5, align 8, !tbaa !13
  %7 = shl nuw nsw i64 %4, 2
  tail call void @llvm.memset.p0.i64(ptr align 4 %6, i8 0, i64 %7, i1 false), !tbaa !14
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.preheader, %1
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: readwrite, 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" }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }

!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 108}
!6 = !{!"_CMatchFinder", !7, i64 0, !10, i64 8, !10, i64 12, !10, i64 16, !10, i64 20, !10, i64 24, !10, i64 28, !8, i64 32, !8, i64 33, !8, i64 34, !8, i64 35, !10, i64 36, !7, i64 40, !7, i64 48, !10, i64 56, !10, i64 60, !7, i64 64, !7, i64 72, !10, i64 80, !10, i64 84, !10, i64 88, !10, i64 92, !11, i64 96, !10, i64 104, !10, i64 108, !10, i64 112, !10, i64 116, !8, i64 120, !11, i64 1144, !12, i64 1152}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"long", !8, i64 0}
!12 = !{!"long long", !8, i64 0}
!13 = !{!6, !7, i64 40}
!14 = !{!10, !10, i64 0}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass