; 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: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #1

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local ptr @r8vec_convolution(i32 noundef %0, ptr noundef %1, i32 noundef %2, ptr noundef %3) #3 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca ptr, align 8
  store i32 %0, ptr %5, align 4, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !5
  store ptr %3, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #4
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = load i32, ptr %7, align 4, !tbaa !5
  %14 = add nsw i32 %12, %13
  %15 = sub nsw i32 %14, 1
  %16 = sext i32 %15 to i64
  %17 = mul i64 %16, 8
  %18 = call noalias ptr @malloc(i64 noundef %17) #5
  store ptr %18, ptr %11, align 8, !tbaa !9
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %19

19:                                               ; preds = %31, %4
  %20 = load i32, ptr %9, align 4, !tbaa !5
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = load i32, ptr %7, align 4, !tbaa !5
  %23 = add nsw i32 %21, %22
  %24 = sub nsw i32 %23, 1
  %25 = icmp slt i32 %20, %24
  br i1 %25, label %26, label %34

26:                                               ; preds = %19
  %27 = load ptr, ptr %11, align 8, !tbaa !9
  %28 = load i32, ptr %9, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds double, ptr %27, i64 %29
  store double 0.000000e+00, ptr %30, align 8, !tbaa !11
  br label %31

31:                                               ; preds = %26
  %32 = load i32, ptr %9, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %9, align 4, !tbaa !5
  br label %19, !llvm.loop !13

34:                                               ; preds = %19
  store i32 0, ptr %10, align 4, !tbaa !5
  br label %35

35:                                               ; preds = %73, %34
  %36 = load i32, ptr %10, align 4, !tbaa !5
  %37 = load i32, ptr %7, align 4, !tbaa !5
  %38 = icmp slt i32 %36, %37
  br i1 %38, label %39, label %76

39:                                               ; preds = %35
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %40

40:                                               ; preds = %69, %39
  %41 = load i32, ptr %9, align 4, !tbaa !5
  %42 = load i32, ptr %5, align 4, !tbaa !5
  %43 = icmp slt i32 %41, %42
  br i1 %43, label %44, label %72

44:                                               ; preds = %40
  %45 = load ptr, ptr %11, align 8, !tbaa !9
  %46 = load i32, ptr %10, align 4, !tbaa !5
  %47 = load i32, ptr %9, align 4, !tbaa !5
  %48 = add nsw i32 %46, %47
  %49 = sext i32 %48 to i64
  %50 = getelementptr inbounds double, ptr %45, i64 %49
  %51 = load double, ptr %50, align 8, !tbaa !11
  %52 = load ptr, ptr %6, align 8, !tbaa !9
  %53 = load i32, ptr %9, align 4, !tbaa !5
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds double, ptr %52, i64 %54
  %56 = load double, ptr %55, align 8, !tbaa !11
  %57 = load ptr, ptr %8, align 8, !tbaa !9
  %58 = load i32, ptr %10, align 4, !tbaa !5
  %59 = sext i32 %58 to i64
  %60 = getelementptr inbounds double, ptr %57, i64 %59
  %61 = load double, ptr %60, align 8, !tbaa !11
  %62 = call double @llvm.fmuladd.f64(double %56, double %61, double %51)
  %63 = load ptr, ptr %11, align 8, !tbaa !9
  %64 = load i32, ptr %10, align 4, !tbaa !5
  %65 = load i32, ptr %9, align 4, !tbaa !5
  %66 = add nsw i32 %64, %65
  %67 = sext i32 %66 to i64
  %68 = getelementptr inbounds double, ptr %63, i64 %67
  store double %62, ptr %68, align 8, !tbaa !11
  br label %69

69:                                               ; preds = %44
  %70 = load i32, ptr %9, align 4, !tbaa !5
  %71 = add nsw i32 %70, 1
  store i32 %71, ptr %9, align 4, !tbaa !5
  br label %40, !llvm.loop !15

72:                                               ; preds = %40
  br label %73

73:                                               ; preds = %72
  %74 = load i32, ptr %10, align 4, !tbaa !5
  %75 = add nsw i32 %74, 1
  store i32 %75, ptr %10, align 4, !tbaa !5
  br label %35, !llvm.loop !16

76:                                               ; preds = %35
  %77 = load ptr, ptr %11, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #4
  ret ptr %77
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { nounwind allocsize(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 #3 = { 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 #4 = { nounwind }
attributes #5 = { nounwind allocsize(0) }

!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}
!16 = distinct !{!16, !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: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #0

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: nofree nounwind memory(readwrite, argmem: read) uwtable
define dso_local noalias noundef ptr @r8vec_convolution(i32 noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2, ptr nocapture noundef readonly %3) local_unnamed_addr #2 {
  %5 = add i32 %0, -1
  %6 = add i32 %5, %2
  %7 = sext i32 %6 to i64
  %8 = shl nsw i64 %7, 3
  %9 = tail call noalias ptr @malloc(i64 noundef %8) #5
  %10 = icmp sgt i32 %6, 0
  br i1 %10, label %.lr.ph.preheader, label %.preheader25

.lr.ph.preheader:                                 ; preds = %4
  %11 = add i32 %2, %0
  %12 = add i32 %11, -2
  %13 = zext i32 %12 to i64
  %14 = shl nuw nsw i64 %13, 3
  %15 = add nuw nsw i64 %14, 8
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(1) %9, i8 0, i64 %15, i1 false), !tbaa !5
  br label %.preheader25

.preheader25:                                     ; preds = %.lr.ph.preheader, %4
  %16 = icmp sgt i32 %2, 0
  %17 = icmp sgt i32 %0, 0
  %or.cond = and i1 %16, %17
  br i1 %or.cond, label %.preheader.us.preheader, label %._crit_edge30

.preheader.us.preheader:                          ; preds = %.preheader25
  %wide.trip.count37 = zext nneg i32 %2 to i64
  %wide.trip.count = zext nneg i32 %0 to i64
  %min.iters.check = icmp ult i32 %0, 4
  %n.vec = and i64 %wide.trip.count, 2147483644
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %indvars.iv34 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next35, %._crit_edge.us ]
  %18 = getelementptr inbounds double, ptr %3, i64 %indvars.iv34
  %19 = load double, ptr %18, align 8, !tbaa !5
  %invariant.gep = getelementptr inbounds double, ptr %9, i64 %indvars.iv34
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.ph

vector.ph:                                        ; preds = %.preheader.us
  %broadcast.splatinsert = insertelement <2 x double> poison, double %19, 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 ]
  %20 = getelementptr inbounds double, ptr %invariant.gep, i64 %index
  %21 = getelementptr inbounds i8, ptr %20, i64 16
  %wide.load = load <2 x double>, ptr %20, align 8, !tbaa !5
  %wide.load39 = load <2 x double>, ptr %21, align 8, !tbaa !5
  %22 = getelementptr inbounds double, ptr %1, i64 %index
  %23 = getelementptr inbounds i8, ptr %22, i64 16
  %wide.load40 = load <2 x double>, ptr %22, align 8, !tbaa !5
  %wide.load41 = load <2 x double>, ptr %23, align 8, !tbaa !5
  %24 = tail call <2 x double> @llvm.fmuladd.v2f64(<2 x double> %wide.load40, <2 x double> %broadcast.splat, <2 x double> %wide.load)
  %25 = tail call <2 x double> @llvm.fmuladd.v2f64(<2 x double> %wide.load41, <2 x double> %broadcast.splat, <2 x double> %wide.load39)
  store <2 x double> %24, ptr %20, align 8, !tbaa !5
  store <2 x double> %25, ptr %21, align 8, !tbaa !5
  %index.next = add nuw i64 %index, 4
  %26 = icmp eq i64 %index.next, %n.vec
  br i1 %26, 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 label %scalar.ph

scalar.ph:                                        ; preds = %scalar.ph.preheader, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %scalar.ph ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %gep = getelementptr inbounds double, ptr %invariant.gep, i64 %indvars.iv
  %27 = load double, ptr %gep, align 8, !tbaa !5
  %28 = getelementptr inbounds double, ptr %1, i64 %indvars.iv
  %29 = load double, ptr %28, align 8, !tbaa !5
  %30 = tail call double @llvm.fmuladd.f64(double %29, double %19, double %27)
  store double %30, ptr %gep, align 8, !tbaa !5
  %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.us, label %scalar.ph, !llvm.loop !13

._crit_edge.us:                                   ; preds = %scalar.ph, %middle.block
  %indvars.iv.next35 = add nuw nsw i64 %indvars.iv34, 1
  %exitcond38.not = icmp eq i64 %indvars.iv.next35, %wide.trip.count37
  br i1 %exitcond38.not, label %._crit_edge30, label %.preheader.us, !llvm.loop !14

._crit_edge30:                                    ; preds = %._crit_edge.us, %.preheader25
  ret ptr %9
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <2 x double> @llvm.fmuladd.v2f64(<2 x double>, <2 x double>, <2 x double>) #4

attributes #0 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { nofree nounwind memory(readwrite, argmem: read) 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 #3 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #5 = { nounwind allocsize(0) }

!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, !12, !11}
!14 = distinct !{!14, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopIdiomRecognizePass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass