; LLVM IR from VoidRune/Audio-engine :: src (minivorbis)

; 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 ptr @res2_class(ptr noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3, i32 noundef %4) #1 {
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  %14 = alloca i32, align 4
  store ptr %0, ptr %7, align 8, !tbaa !5
  store ptr %1, ptr %8, align 8, !tbaa !5
  store ptr %2, ptr %9, align 8, !tbaa !5
  store ptr %3, ptr %10, align 8, !tbaa !5
  store i32 %4, ptr %11, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #2
  store i32 0, ptr %13, align 4, !tbaa !9
  store i32 0, ptr %12, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %30, %5
  %16 = load i32, ptr %12, align 4, !tbaa !9
  %17 = load i32, ptr %11, align 4, !tbaa !9
  %18 = icmp slt i32 %16, %17
  br i1 %18, label %19, label %33

19:                                               ; preds = %15
  %20 = load ptr, ptr %10, align 8, !tbaa !5
  %21 = load i32, ptr %12, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds i32, ptr %20, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !9
  %25 = icmp ne i32 %24, 0
  br i1 %25, label %26, label %29

26:                                               ; preds = %19
  %27 = load i32, ptr %13, align 4, !tbaa !9
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %13, align 4, !tbaa !9
  br label %29

29:                                               ; preds = %26, %19
  br label %30

30:                                               ; preds = %29
  %31 = load i32, ptr %12, align 4, !tbaa !9
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %12, align 4, !tbaa !9
  br label %15, !llvm.loop !11

33:                                               ; preds = %15
  %34 = load i32, ptr %13, align 4, !tbaa !9
  %35 = icmp ne i32 %34, 0
  br i1 %35, label %36, label %42

36:                                               ; preds = %33
  %37 = load ptr, ptr %7, align 8, !tbaa !5
  %38 = load ptr, ptr %8, align 8, !tbaa !5
  %39 = load ptr, ptr %9, align 8, !tbaa !5
  %40 = load i32, ptr %11, align 4, !tbaa !9
  %41 = call ptr @_2class(ptr noundef %37, ptr noundef %38, ptr noundef %39, i32 noundef %40)
  store ptr %41, ptr %6, align 8
  store i32 1, ptr %14, align 4
  br label %43

42:                                               ; preds = %33
  store ptr null, ptr %6, align 8
  store i32 1, ptr %14, align 4
  br label %43

43:                                               ; preds = %42, %36
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #2
  %44 = load ptr, ptr %6, align 8
  ret ptr %44
}

; Function Attrs: nounwind uwtable
declare hidden ptr @_2class(ptr noundef, ptr noundef, ptr noundef, i32 noundef) #1

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 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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: nounwind uwtable
define dso_local ptr @res2_class(ptr noundef %0, ptr noundef %1, ptr noundef %2, ptr nocapture noundef readonly %3, i32 noundef %4) local_unnamed_addr #0 {
  %6 = icmp sgt i32 %4, 0
  br i1 %6, label %.lr.ph.preheader, label %._crit_edge.thread

.lr.ph.preheader:                                 ; preds = %5
  %wide.trip.count = zext nneg i32 %4 to i64
  %min.iters.check = icmp ult i32 %4, 8
  br i1 %min.iters.check, label %.lr.ph.preheader21, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %wide.trip.count, 2147483640
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %13, %vector.body ]
  %vec.phi19 = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %14, %vector.body ]
  %7 = getelementptr inbounds i32, ptr %3, i64 %index
  %8 = getelementptr inbounds i8, ptr %7, i64 16
  %wide.load = load <4 x i32>, ptr %7, align 4, !tbaa !5
  %wide.load20 = load <4 x i32>, ptr %8, align 4, !tbaa !5
  %9 = icmp ne <4 x i32> %wide.load, zeroinitializer
  %10 = icmp ne <4 x i32> %wide.load20, zeroinitializer
  %11 = zext <4 x i1> %9 to <4 x i32>
  %12 = zext <4 x i1> %10 to <4 x i32>
  %13 = add <4 x i32> %vec.phi, %11
  %14 = add <4 x i32> %vec.phi19, %12
  %index.next = add nuw i64 %index, 8
  %15 = icmp eq i64 %index.next, %n.vec
  br i1 %15, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %bin.rdx = add <4 x i32> %14, %13
  %16 = tail call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> %bin.rdx)
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader21

.lr.ph.preheader21:                               ; preds = %middle.block, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %.016.ph = phi i32 [ 0, %.lr.ph.preheader ], [ %16, %middle.block ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader21, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ %indvars.iv.ph, %.lr.ph.preheader21 ]
  %.016 = phi i32 [ %spec.select, %.lr.ph ], [ %.016.ph, %.lr.ph.preheader21 ]
  %17 = getelementptr inbounds i32, ptr %3, i64 %indvars.iv
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %.not14 = icmp ne i32 %18, 0
  %19 = zext i1 %.not14 to i32
  %spec.select = add nuw nsw i32 %.016, %19
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %middle.block
  %spec.select.lcssa = phi i32 [ %16, %middle.block ], [ %spec.select, %.lr.ph ]
  %20 = icmp eq i32 %spec.select.lcssa, 0
  br i1 %20, label %._crit_edge.thread, label %21

21:                                               ; preds = %._crit_edge
  %22 = tail call ptr @_2class(ptr noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %4)
  br label %._crit_edge.thread

._crit_edge.thread:                               ; preds = %5, %._crit_edge, %21
  %.012 = phi ptr [ %22, %21 ], [ null, %._crit_edge ], [ null, %5 ]
  ret ptr %.012
}

; Function Attrs: nounwind uwtable
declare hidden ptr @_2class(ptr noundef, ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

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

attributes #0 = { 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 = { 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: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass