; LLVM IR from jgaeddert/liquid-dsp :: bench (null_benchmark)

; 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: nounwind uwtable
define dso_local void @benchmark_null(ptr noundef %0, ptr noundef %1, ptr noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %9 = load ptr, ptr %6, align 8, !tbaa !5
  %10 = load i64, ptr %9, align 8, !tbaa !9
  %11 = mul i64 %10, 100
  store i64 %11, ptr %9, align 8, !tbaa !9
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = call i32 @getrusage(i32 noundef 0, ptr noundef %12) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 0, ptr %8, align 4, !tbaa !11
  store i64 0, ptr %7, align 8, !tbaa !9
  br label %14

14:                                               ; preds = %28, %3
  %15 = load i64, ptr %7, align 8, !tbaa !9
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = load i64, ptr %16, align 8, !tbaa !9
  %18 = icmp ult i64 %15, %17
  br i1 %18, label %19, label %31

19:                                               ; preds = %14
  %20 = load i32, ptr %8, align 4, !tbaa !11
  %21 = shl i32 %20, 1
  store i32 %21, ptr %8, align 4, !tbaa !11
  %22 = load i32, ptr %8, align 4, !tbaa !11
  %23 = or i32 %22, 1
  store i32 %23, ptr %8, align 4, !tbaa !11
  %24 = load i32, ptr %8, align 4, !tbaa !11
  %25 = and i32 %24, 255
  store i32 %25, ptr %8, align 4, !tbaa !11
  %26 = load i32, ptr %8, align 4, !tbaa !11
  %27 = xor i32 %26, 255
  store i32 %27, ptr %8, align 4, !tbaa !11
  br label %28

28:                                               ; preds = %19
  %29 = load i64, ptr %7, align 8, !tbaa !9
  %30 = add i64 %29, 1
  store i64 %30, ptr %7, align 8, !tbaa !9
  br label %14, !llvm.loop !13

31:                                               ; preds = %14
  %32 = load i32, ptr %8, align 4, !tbaa !11
  %33 = and i32 %32, 4660
  %34 = icmp ne i32 %33, 0
  %35 = zext i1 %34 to i64
  %36 = select i1 %34, i32 0, i32 1
  %37 = sext i32 %36 to i64
  %38 = load ptr, ptr %6, align 8, !tbaa !5
  %39 = load i64, ptr %38, align 8, !tbaa !9
  %40 = add i64 %39, %37
  store i64 %40, ptr %38, align 8, !tbaa !9
  %41 = load ptr, ptr %5, align 8, !tbaa !5
  %42 = call i32 @getrusage(i32 noundef 0, ptr noundef %41) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind
declare i32 @getrusage(i32 noundef, ptr noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind "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 #3 = { 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", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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: nounwind uwtable
define dso_local void @benchmark_null(ptr noundef %0, ptr noundef %1, ptr nocapture noundef %2) local_unnamed_addr #0 {
  %4 = load i64, ptr %2, align 8, !tbaa !5
  %5 = mul i64 %4, 100
  store i64 %5, ptr %2, align 8, !tbaa !5
  %6 = tail call i32 @getrusage(i32 noundef 0, ptr noundef %0) #2
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %.not16 = icmp eq i64 %7, 0
  br i1 %.not16, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %xtraiter = and i64 %7, 3
  %8 = icmp ult i64 %7, 4
  br i1 %8, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %7, -4
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %.014 = phi i32 [ 0, %.lr.ph.preheader.new ], [ %11, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %9 = shl nsw i32 %.014, 4
  %10 = and i32 %9, 240
  %11 = or disjoint i32 %10, 10
  %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 %.lr.ph, !llvm.loop !9

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa.ph = phi i32 [ poison, %.lr.ph.preheader ], [ %11, %.lr.ph ]
  %.014.unr = phi i32 [ 0, %.lr.ph.preheader ], [ %11, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge.loopexit, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil
  %.014.epil = phi i32 [ %14, %.lr.ph.epil ], [ %.014.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %12 = shl nuw nsw i32 %.014.epil, 1
  %13 = and i32 %12, 254
  %14 = xor i32 %13, 254
  %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.loopexit, label %.lr.ph.epil, !llvm.loop !11

._crit_edge.loopexit:                             ; preds = %.lr.ph.epil, %._crit_edge.loopexit.unr-lcssa
  %.lcssa = phi i32 [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %14, %.lr.ph.epil ]
  %15 = and i32 %.lcssa, 52
  %16 = icmp eq i32 %15, 0
  %17 = zext i1 %16 to i64
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %3
  %.0.lcssa = phi i64 [ 1, %3 ], [ %17, %._crit_edge.loopexit ]
  %18 = add i64 %7, %.0.lcssa
  store i64 %18, ptr %2, align 8, !tbaa !5
  %19 = tail call i32 @getrusage(i32 noundef 0, ptr noundef %1) #2
  ret void
}

; Function Attrs: nounwind
declare i32 @getrusage(i32 noundef, ptr noundef) local_unnamed_addr #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 = { nounwind "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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.unroll.disable"}


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