; LLVM IR from PymZoR/S-curve-Planner :: lib (bbpr)

; 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 @diff_poly(ptr noundef %0, i32 noundef %1, ptr noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca double, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = sitofp i32 %9 to double
  store double %10, ptr %7, align 8, !tbaa !11
  %11 = load ptr, ptr %6, align 8, !tbaa !5
  %12 = getelementptr inbounds double, ptr %11, i64 0
  store double 1.000000e+00, ptr %12, align 8, !tbaa !11
  store i32 1, ptr %8, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %34, %3
  %14 = load i32, ptr %8, align 4, !tbaa !9
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = icmp slt i32 %14, %15
  br i1 %16, label %17, label %37

17:                                               ; preds = %13
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = load i32, ptr %8, align 4, !tbaa !9
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds double, ptr %18, i64 %20
  %22 = load double, ptr %21, align 8, !tbaa !11
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = load i32, ptr %8, align 4, !tbaa !9
  %25 = sub nsw i32 %23, %24
  %26 = sitofp i32 %25 to double
  %27 = fmul double %22, %26
  %28 = load double, ptr %7, align 8, !tbaa !11
  %29 = fdiv double %27, %28
  %30 = load ptr, ptr %6, align 8, !tbaa !5
  %31 = load i32, ptr %8, align 4, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds double, ptr %30, i64 %32
  store double %29, ptr %33, align 8, !tbaa !11
  br label %34

34:                                               ; preds = %17
  %35 = load i32, ptr %8, align 4, !tbaa !9
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %8, align 4, !tbaa !9
  br label %13, !llvm.loop !13

37:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #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 = !{!"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 = !{!12, !12, i64 0}
!12 = !{!"double", !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 @diff_poly(ptr nocapture noundef readonly %0, i32 noundef %1, ptr nocapture noundef writeonly %2) local_unnamed_addr #0 {
  %4 = sitofp i32 %1 to double
  store double 1.000000e+00, ptr %2, align 8, !tbaa !5
  %5 = icmp sgt i32 %1, 1
  br i1 %5, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %6 = ptrtoint ptr %2 to i64
  %7 = ptrtoint ptr %0 to i64
  %wide.trip.count = zext nneg i32 %1 to i64
  %8 = add nsw i64 %wide.trip.count, -1
  %min.iters.check = icmp eq i32 %1, 2
  %9 = sub i64 %6, %7
  %diff.check = icmp ult i64 %9, 16
  %or.cond = or i1 %min.iters.check, %diff.check
  br i1 %or.cond, label %.lr.ph.preheader16, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %8, -2
  %ind.end = or i64 %8, 1
  %broadcast.splatinsert = insertelement <2 x i32> poison, i32 %1, i64 0
  %broadcast.splat = shufflevector <2 x i32> %broadcast.splatinsert, <2 x i32> poison, <2 x i32> zeroinitializer
  %broadcast.splatinsert14 = insertelement <2 x double> poison, double %4, i64 0
  %broadcast.splat15 = shufflevector <2 x double> %broadcast.splatinsert14, <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 ]
  %vec.ind = phi <2 x i32> [ <i32 1, i32 2>, %vector.ph ], [ %vec.ind.next, %vector.body ]
  %offset.idx = or disjoint i64 %index, 1
  %10 = getelementptr inbounds double, ptr %0, i64 %offset.idx
  %wide.load = load <2 x double>, ptr %10, align 8, !tbaa !5
  %11 = sub <2 x i32> %broadcast.splat, %vec.ind
  %12 = sitofp <2 x i32> %11 to <2 x double>
  %13 = fmul <2 x double> %wide.load, %12
  %14 = fdiv <2 x double> %13, %broadcast.splat15
  %15 = getelementptr inbounds double, ptr %2, i64 %offset.idx
  store <2 x double> %14, ptr %15, align 8, !tbaa !5
  %index.next = add nuw i64 %index, 2
  %vec.ind.next = add <2 x i32> %vec.ind, <i32 2, i32 2>
  %16 = icmp eq i64 %index.next, %n.vec
  br i1 %16, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %8, %n.vec
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader16

.lr.ph.preheader16:                               ; preds = %middle.block, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 1, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  %17 = and i64 %wide.trip.count, 1
  %lcmp.mod.not.not = icmp eq i64 %17, 0
  br i1 %lcmp.mod.not.not, label %.lr.ph.prol, label %.lr.ph.prol.loopexit

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader16
  %18 = getelementptr inbounds double, ptr %0, i64 %indvars.iv.ph
  %19 = load double, ptr %18, align 8, !tbaa !5
  %20 = trunc nsw i64 %indvars.iv.ph to i32
  %21 = sub i32 %1, %20
  %22 = sitofp i32 %21 to double
  %23 = fmul double %19, %22
  %24 = fdiv double %23, %4
  %25 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.ph
  store double %24, ptr %25, align 8, !tbaa !5
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.ph, 1
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader16
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader16 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %26 = add nsw i64 %wide.trip.count, -1
  %27 = icmp eq i64 %indvars.iv.ph, %26
  br i1 %27, 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 ]
  %28 = getelementptr inbounds double, ptr %0, i64 %indvars.iv
  %29 = load double, ptr %28, align 8, !tbaa !5
  %30 = trunc i64 %indvars.iv to i32
  %31 = sub i32 %1, %30
  %32 = sitofp i32 %31 to double
  %33 = fmul double %29, %32
  %34 = fdiv double %33, %4
  %35 = getelementptr inbounds double, ptr %2, i64 %indvars.iv
  store double %34, ptr %35, align 8, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %36 = getelementptr inbounds double, ptr %0, i64 %indvars.iv.next
  %37 = load double, ptr %36, align 8, !tbaa !5
  %38 = trunc i64 %indvars.iv.next to i32
  %39 = sub i32 %1, %38
  %40 = sitofp i32 %39 to double
  %41 = fmul double %37, %40
  %42 = fdiv double %41, %4
  %43 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.next
  store double %42, ptr %43, align 8, !tbaa !5
  %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, %3
  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: BDCEPass,EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass