; LLVM IR from CLASS-SZ/class_sz :: class-sz/tools (r8lib)

; 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 @r8vec_step(double noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef %3) #1 {
  %5 = alloca double, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store double %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !11
  store ptr %3, ptr %8, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %33, %4
  %11 = load i32, ptr %9, align 4, !tbaa !9
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %14, label %36

14:                                               ; preds = %10
  %15 = load ptr, ptr %7, align 8, !tbaa !11
  %16 = load i32, ptr %9, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds double, ptr %15, i64 %17
  %19 = load double, ptr %18, align 8, !tbaa !5
  %20 = load double, ptr %5, align 8, !tbaa !5
  %21 = fcmp olt double %19, %20
  br i1 %21, label %22, label %27

22:                                               ; preds = %14
  %23 = load ptr, ptr %8, align 8, !tbaa !11
  %24 = load i32, ptr %9, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds double, ptr %23, i64 %25
  store double 0.000000e+00, ptr %26, align 8, !tbaa !5
  br label %32

27:                                               ; preds = %14
  %28 = load ptr, ptr %8, align 8, !tbaa !11
  %29 = load i32, ptr %9, align 4, !tbaa !9
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds double, ptr %28, i64 %30
  store double 1.000000e+00, ptr %31, align 8, !tbaa !5
  br label %32

32:                                               ; preds = %27, %22
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %9, align 4, !tbaa !9
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %9, align 4, !tbaa !9
  br label %10, !llvm.loop !13

36:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #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 = !{!"double", !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 = !{!12, !12, i64 0}
!12 = !{!"any pointer", !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 @r8vec_step(double noundef %0, i32 noundef %1, ptr nocapture noundef readonly %2, ptr nocapture noundef writeonly %3) local_unnamed_addr #0 {
  %5 = icmp sgt i32 %1, 0
  br i1 %5, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %4
  %6 = ptrtoint ptr %3 to i64
  %7 = ptrtoint ptr %2 to i64
  %wide.trip.count = zext nneg i32 %1 to i64
  %min.iters.check = icmp ult i32 %1, 4
  %8 = sub i64 %6, %7
  %diff.check = icmp ult i64 %8, 32
  %or.cond = or i1 %min.iters.check, %diff.check
  br i1 %or.cond, label %.lr.ph.preheader12, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %wide.trip.count, 2147483644
  %broadcast.splatinsert = insertelement <2 x double> poison, double %0, i64 0
  %broadcast.splat = shufflevector <2 x double> %broadcast.splatinsert, <2 x double> poison, <2 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %9 = getelementptr inbounds double, ptr %2, i64 %index
  %10 = getelementptr inbounds i8, ptr %9, i64 16
  %wide.load = load <2 x double>, ptr %9, align 8, !tbaa !5
  %wide.load11 = load <2 x double>, ptr %10, align 8, !tbaa !5
  %11 = fcmp olt <2 x double> %wide.load, %broadcast.splat
  %12 = fcmp olt <2 x double> %wide.load11, %broadcast.splat
  %13 = select <2 x i1> %11, <2 x double> zeroinitializer, <2 x double> <double 1.000000e+00, double 1.000000e+00>
  %14 = select <2 x i1> %12, <2 x double> zeroinitializer, <2 x double> <double 1.000000e+00, double 1.000000e+00>
  %15 = getelementptr inbounds double, ptr %3, i64 %index
  %16 = getelementptr inbounds i8, ptr %15, i64 16
  store <2 x double> %13, ptr %15, align 8
  store <2 x double> %14, ptr %16, align 8
  %index.next = add nuw i64 %index, 4
  %17 = icmp eq i64 %index.next, %n.vec
  br i1 %17, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader12

.lr.ph.preheader12:                               ; preds = %middle.block, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 1
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader12
  %18 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.ph
  %19 = load double, ptr %18, align 8, !tbaa !5
  %20 = fcmp olt double %19, %0
  %.sink.prol = select i1 %20, double 0.000000e+00, double 1.000000e+00
  %21 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.ph
  store double %.sink.prol, ptr %21, align 8
  %indvars.iv.next.prol = or disjoint i64 %indvars.iv.ph, 1
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader12
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader12 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %22 = add nsw i64 %wide.trip.count, -1
  %23 = icmp eq i64 %indvars.iv.ph, %22
  br i1 %23, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %24 = getelementptr inbounds double, ptr %2, i64 %indvars.iv
  %25 = load double, ptr %24, align 8, !tbaa !5
  %26 = fcmp olt double %25, %0
  %.sink = select i1 %26, double 0.000000e+00, double 1.000000e+00
  %27 = getelementptr inbounds double, ptr %3, i64 %indvars.iv
  store double %.sink, ptr %27, align 8
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %28 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.next
  %29 = load double, ptr %28, align 8, !tbaa !5
  %30 = fcmp olt double %29, %0
  %.sink.1 = select i1 %30, double 0.000000e+00, double 1.000000e+00
  %31 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.next
  store double %.sink.1, ptr %31, align 8
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %exitcond.not.1 = icmp eq i64 %indvars.iv.next.1, %wide.trip.count
  br i1 %exitcond.not.1, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %4
  ret void
}

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" }

!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 = !{!"double", !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, !11}


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