; 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 @r8mat_copy(i32 noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef %3) #1 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i32 %0, ptr %5, align 4, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  store i32 0, ptr %10, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %42, %4
  %12 = load i32, ptr %10, align 4, !tbaa !5
  %13 = load i32, ptr %6, align 4, !tbaa !5
  %14 = icmp slt i32 %12, %13
  br i1 %14, label %15, label %45

15:                                               ; preds = %11
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %38, %15
  %17 = load i32, ptr %9, align 4, !tbaa !5
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %20, label %41

20:                                               ; preds = %16
  %21 = load ptr, ptr %7, align 8, !tbaa !9
  %22 = load i32, ptr %9, align 4, !tbaa !5
  %23 = load i32, ptr %10, align 4, !tbaa !5
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = mul nsw i32 %23, %24
  %26 = add nsw i32 %22, %25
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds double, ptr %21, i64 %27
  %29 = load double, ptr %28, align 8, !tbaa !11
  %30 = load ptr, ptr %8, align 8, !tbaa !9
  %31 = load i32, ptr %9, align 4, !tbaa !5
  %32 = load i32, ptr %10, align 4, !tbaa !5
  %33 = load i32, ptr %5, align 4, !tbaa !5
  %34 = mul nsw i32 %32, %33
  %35 = add nsw i32 %31, %34
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds double, ptr %30, i64 %36
  store double %29, ptr %37, align 8, !tbaa !11
  br label %38

38:                                               ; preds = %20
  %39 = load i32, ptr %9, align 4, !tbaa !5
  %40 = add nsw i32 %39, 1
  store i32 %40, ptr %9, align 4, !tbaa !5
  br label %16, !llvm.loop !13

41:                                               ; preds = %16
  br label %42

42:                                               ; preds = %41
  %43 = load i32, ptr %10, align 4, !tbaa !5
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %10, align 4, !tbaa !5
  br label %11, !llvm.loop !15

45:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  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 = !{!"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 = !{!"double", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


; 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 @r8mat_copy(i32 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
  %6 = icmp sgt i32 %0, 0
  %or.cond = and i1 %5, %6
  br i1 %or.cond, label %.preheader.us.preheader, label %._crit_edge17

.preheader.us.preheader:                          ; preds = %4
  %7 = ptrtoint ptr %3 to i64
  %8 = ptrtoint ptr %2 to i64
  %9 = zext nneg i32 %0 to i64
  %wide.trip.count24 = zext nneg i32 %1 to i64
  %10 = sub i64 %7, %8
  %min.iters.check = icmp ult i32 %0, 4
  %diff.check = icmp ult i64 %10, 32
  %or.cond27 = or i1 %min.iters.check, %diff.check
  %n.vec = and i64 %9, 2147483644
  %cmp.n = icmp eq i64 %n.vec, %9
  %xtraiter = and i64 %9, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %indvars.iv21 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next22, %._crit_edge.us ]
  %11 = mul nuw nsw i64 %indvars.iv21, %9
  br i1 %or.cond27, label %scalar.ph.preheader, label %vector.body

vector.body:                                      ; preds = %.preheader.us, %vector.body
  %index = phi i64 [ %index.next, %vector.body ], [ 0, %.preheader.us ]
  %12 = add nuw nsw i64 %index, %11
  %13 = getelementptr inbounds double, ptr %2, i64 %12
  %14 = getelementptr inbounds i8, ptr %13, i64 16
  %wide.load = load <2 x double>, ptr %13, align 8, !tbaa !5
  %wide.load26 = load <2 x double>, ptr %14, align 8, !tbaa !5
  %15 = getelementptr inbounds double, ptr %3, i64 %12
  %16 = getelementptr inbounds i8, ptr %15, i64 16
  store <2 x double> %wide.load, ptr %15, align 8, !tbaa !5
  store <2 x double> %wide.load26, ptr %16, align 8, !tbaa !5
  %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
  br i1 %cmp.n, label %._crit_edge.us, label %scalar.ph.preheader

scalar.ph.preheader:                              ; preds = %middle.block, %.preheader.us
  %indvars.iv.ph = phi i64 [ 0, %.preheader.us ], [ %n.vec, %middle.block ]
  br i1 %lcmp.mod.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol

scalar.ph.prol:                                   ; preds = %scalar.ph.preheader, %scalar.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %scalar.ph.prol ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %prol.iter = phi i64 [ %prol.iter.next, %scalar.ph.prol ], [ 0, %scalar.ph.preheader ]
  %18 = add nuw nsw i64 %indvars.iv.prol, %11
  %19 = getelementptr inbounds double, ptr %2, i64 %18
  %20 = load double, ptr %19, align 8, !tbaa !5
  %21 = getelementptr inbounds double, ptr %3, i64 %18
  store double %20, ptr %21, align 8, !tbaa !5
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.prol, 1
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol, !llvm.loop !13

scalar.ph.prol.loopexit:                          ; preds = %scalar.ph.prol, %scalar.ph.preheader
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %scalar.ph.preheader ], [ %indvars.iv.next.prol, %scalar.ph.prol ]
  %22 = sub nsw i64 %indvars.iv.ph, %9
  %23 = icmp ugt i64 %22, -4
  br i1 %23, label %._crit_edge.us, label %scalar.ph

scalar.ph:                                        ; preds = %scalar.ph.prol.loopexit, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %scalar.ph ], [ %indvars.iv.unr, %scalar.ph.prol.loopexit ]
  %24 = add nuw nsw i64 %indvars.iv, %11
  %25 = getelementptr inbounds double, ptr %2, i64 %24
  %26 = load double, ptr %25, align 8, !tbaa !5
  %27 = getelementptr inbounds double, ptr %3, i64 %24
  store double %26, ptr %27, align 8, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %28 = add nuw nsw i64 %indvars.iv.next, %11
  %29 = getelementptr inbounds double, ptr %2, i64 %28
  %30 = load double, ptr %29, align 8, !tbaa !5
  %31 = getelementptr inbounds double, ptr %3, i64 %28
  store double %30, ptr %31, align 8, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %32 = add nuw nsw i64 %indvars.iv.next.1, %11
  %33 = getelementptr inbounds double, ptr %2, i64 %32
  %34 = load double, ptr %33, align 8, !tbaa !5
  %35 = getelementptr inbounds double, ptr %3, i64 %32
  store double %34, ptr %35, align 8, !tbaa !5
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %36 = add nuw nsw i64 %indvars.iv.next.2, %11
  %37 = getelementptr inbounds double, ptr %2, i64 %36
  %38 = load double, ptr %37, align 8, !tbaa !5
  %39 = getelementptr inbounds double, ptr %3, i64 %36
  store double %38, ptr %39, align 8, !tbaa !5
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %9
  br i1 %exitcond.not.3, label %._crit_edge.us, label %scalar.ph, !llvm.loop !15

._crit_edge.us:                                   ; preds = %scalar.ph.prol.loopexit, %scalar.ph, %middle.block
  %indvars.iv.next22 = add nuw nsw i64 %indvars.iv21, 1
  %exitcond25.not = icmp eq i64 %indvars.iv.next22, %wide.trip.count24
  br i1 %exitcond25.not, label %._crit_edge17, label %.preheader.us, !llvm.loop !16

._crit_edge17:                                    ; preds = %._crit_edge.us, %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, !14}
!14 = !{!"llvm.loop.unroll.disable"}
!15 = distinct !{!15, !10, !11}
!16 = distinct !{!16, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass