; LLVM IR from radualexandrub/Optimization-Algorithms-Find-local-minimum :: 2D_Derivative_NonQuadratic_CostFunctions (Vec_add)

; 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 @Vec_add(i32 noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3) #1 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store i32 %0, ptr %5, align 4, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !9
  %10 = load i32, ptr %5, align 4, !tbaa !5
  %11 = zext i32 %10 to i64
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %33, %4
  %13 = load i32, ptr %9, align 4, !tbaa !5
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  br label %36

17:                                               ; preds = %12
  %18 = load ptr, ptr %6, align 8, !tbaa !9
  %19 = load i32, ptr %9, align 4, !tbaa !5
  %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 ptr, ptr %7, align 8, !tbaa !9
  %24 = load i32, ptr %9, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds double, ptr %23, i64 %25
  %27 = load double, ptr %26, align 8, !tbaa !11
  %28 = fadd double %22, %27
  %29 = load ptr, ptr %8, align 8, !tbaa !9
  %30 = load i32, ptr %9, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds double, ptr %29, i64 %31
  store double %28, ptr %32, align 8, !tbaa !11
  br label %33

33:                                               ; preds = %17
  %34 = load i32, ptr %9, align 4, !tbaa !5
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %9, align 4, !tbaa !5
  br label %12, !llvm.loop !13

36:                                               ; preds = %16
  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"}


; 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 @Vec_add(i32 noundef %0, ptr nocapture noundef readonly %1, ptr nocapture noundef readonly %2, ptr nocapture noundef writeonly %3) local_unnamed_addr #0 {
  %5 = ptrtoint ptr %2 to i64
  %6 = ptrtoint ptr %1 to i64
  %7 = ptrtoint ptr %3 to i64
  %8 = icmp sgt i32 %0, 0
  br i1 %8, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %4
  %wide.trip.count = zext nneg i32 %0 to i64
  %min.iters.check = icmp ult i32 %0, 8
  br i1 %min.iters.check, label %.lr.ph.preheader15, label %vector.memcheck

.lr.ph.preheader15:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 3
  %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.preheader15, %.lr.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %.lr.ph.prol ], [ %indvars.iv.ph, %.lr.ph.preheader15 ]
  %prol.iter = phi i64 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader15 ]
  %9 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.prol
  %10 = load double, ptr %9, align 8, !tbaa !5
  %11 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.prol
  %12 = load double, ptr %11, align 8, !tbaa !5
  %13 = fadd double %10, %12
  %14 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.prol
  store double %13, ptr %14, 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 %.lr.ph.prol.loopexit, label %.lr.ph.prol, !llvm.loop !9

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader15
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader15 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %15 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %16 = icmp ugt i64 %15, -4
  br i1 %16, label %._crit_edge, label %.lr.ph

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %17 = sub i64 %7, %6
  %diff.check = icmp ult i64 %17, 32
  %18 = sub i64 %7, %5
  %diff.check11 = icmp ult i64 %18, 32
  %conflict.rdx = or i1 %diff.check, %diff.check11
  br i1 %conflict.rdx, label %.lr.ph.preheader15, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %wide.trip.count, 2147483644
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %19 = getelementptr inbounds double, ptr %1, i64 %index
  %20 = getelementptr inbounds i8, ptr %19, i64 16
  %wide.load = load <2 x double>, ptr %19, align 8, !tbaa !5
  %wide.load12 = load <2 x double>, ptr %20, align 8, !tbaa !5
  %21 = getelementptr inbounds double, ptr %2, i64 %index
  %22 = getelementptr inbounds i8, ptr %21, i64 16
  %wide.load13 = load <2 x double>, ptr %21, align 8, !tbaa !5
  %wide.load14 = load <2 x double>, ptr %22, align 8, !tbaa !5
  %23 = fadd <2 x double> %wide.load, %wide.load13
  %24 = fadd <2 x double> %wide.load12, %wide.load14
  %25 = getelementptr inbounds double, ptr %3, i64 %index
  %26 = getelementptr inbounds i8, ptr %25, i64 16
  store <2 x double> %23, ptr %25, align 8, !tbaa !5
  store <2 x double> %24, ptr %26, align 8, !tbaa !5
  %index.next = add nuw i64 %index, 4
  %27 = icmp eq i64 %index.next, %n.vec
  br i1 %27, label %middle.block, label %vector.body, !llvm.loop !11

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.preheader15

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

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %28 = getelementptr inbounds double, ptr %1, i64 %indvars.iv
  %29 = load double, ptr %28, align 8, !tbaa !5
  %30 = getelementptr inbounds double, ptr %2, i64 %indvars.iv
  %31 = load double, ptr %30, align 8, !tbaa !5
  %32 = fadd double %29, %31
  %33 = getelementptr inbounds double, ptr %3, i64 %indvars.iv
  store double %32, ptr %33, align 8, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %34 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.next
  %35 = load double, ptr %34, align 8, !tbaa !5
  %36 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.next
  %37 = load double, ptr %36, align 8, !tbaa !5
  %38 = fadd double %35, %37
  %39 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.next
  store double %38, ptr %39, align 8, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %40 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.next.1
  %41 = load double, ptr %40, align 8, !tbaa !5
  %42 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.next.1
  %43 = load double, ptr %42, align 8, !tbaa !5
  %44 = fadd double %41, %43
  %45 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.next.1
  store double %44, ptr %45, align 8, !tbaa !5
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %46 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.next.2
  %47 = load double, ptr %46, align 8, !tbaa !5
  %48 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.next.2
  %49 = load double, ptr %48, align 8, !tbaa !5
  %50 = fadd double %47, %49
  %51 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.next.2
  store double %50, ptr %51, 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, %wide.trip.count
  br i1 %exitcond.not.3, label %._crit_edge, label %.lr.ph, !llvm.loop !15
}

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}
!10 = !{!"llvm.loop.unroll.disable"}
!11 = distinct !{!11, !12, !13, !14}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!"llvm.loop.isvectorized", i32 1}
!14 = !{!"llvm.loop.unroll.runtime.disable"}
!15 = distinct !{!15, !12, !13}


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