; LLVM IR from sbischoff-ai/simple-molecular-dynamics :: SimpleMolecularDynamics/SimpleMolecularDynamics/vec.ll (ZN3vecaSERKS_)

; 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"

%class.vec = type <{ ptr, i32, [4 x i8] }>

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare { i64, i1 } @llvm.umul.with.overflow.i64(i64, i64) #0

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nobuiltin nounwind
declare void @_ZdaPv(ptr noundef) #3

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(12) ptr @_ZN3vecaSERKS_(ptr noundef nonnull align 8 dereferenceable(12) %0, ptr noundef nonnull align 8 dereferenceable(12) %1) #4 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %7 = load ptr, ptr %4, align 8
  %8 = load ptr, ptr %5, align 8, !tbaa !5
  %9 = icmp eq ptr %7, %8
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  store ptr %7, ptr %3, align 8
  br label %67

11:                                               ; preds = %2
  %12 = getelementptr inbounds %class.vec, ptr %7, i32 0, i32 1
  %13 = load i32, ptr %12, align 8, !tbaa !9
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = getelementptr inbounds %class.vec, ptr %14, i32 0, i32 1
  %16 = load i32, ptr %15, align 8, !tbaa !9
  %17 = icmp ne i32 %13, %16
  br i1 %17, label %18, label %39

18:                                               ; preds = %11
  %19 = getelementptr inbounds %class.vec, ptr %7, i32 0, i32 0
  %20 = load ptr, ptr %19, align 8, !tbaa !12
  %21 = icmp ne ptr %20, null
  br i1 %21, label %22, label %28

22:                                               ; preds = %18
  %23 = getelementptr inbounds %class.vec, ptr %7, i32 0, i32 0
  %24 = load ptr, ptr %23, align 8, !tbaa !12
  %25 = icmp eq ptr %24, null
  br i1 %25, label %27, label %26

26:                                               ; preds = %22
  call void @_ZdaPv(ptr noundef %24) #5
  br label %27

27:                                               ; preds = %26, %22
  br label %28

28:                                               ; preds = %27, %18
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = getelementptr inbounds %class.vec, ptr %29, i32 0, i32 1
  %31 = load i32, ptr %30, align 8, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %32, i64 8)
  %34 = extractvalue { i64, i1 } %33, 1
  %35 = extractvalue { i64, i1 } %33, 0
  %36 = select i1 %34, i64 -1, i64 %35
  %37 = call noalias noundef nonnull ptr @_Znam(i64 noundef %36) #6
  %38 = getelementptr inbounds %class.vec, ptr %7, i32 0, i32 0
  store ptr %37, ptr %38, align 8, !tbaa !12
  br label %39

39:                                               ; preds = %28, %11
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #7
  store i32 0, ptr %6, align 4, !tbaa !13
  br label %40

40:                                               ; preds = %59, %39
  %41 = load i32, ptr %6, align 4, !tbaa !13
  %42 = load ptr, ptr %5, align 8, !tbaa !5
  %43 = getelementptr inbounds %class.vec, ptr %42, i32 0, i32 1
  %44 = load i32, ptr %43, align 8, !tbaa !9
  %45 = icmp slt i32 %41, %44
  br i1 %45, label %46, label %62

46:                                               ; preds = %40
  %47 = load ptr, ptr %5, align 8, !tbaa !5
  %48 = getelementptr inbounds %class.vec, ptr %47, i32 0, i32 0
  %49 = load ptr, ptr %48, align 8, !tbaa !12
  %50 = load i32, ptr %6, align 4, !tbaa !13
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds double, ptr %49, i64 %51
  %53 = load double, ptr %52, align 8, !tbaa !14
  %54 = getelementptr inbounds %class.vec, ptr %7, i32 0, i32 0
  %55 = load ptr, ptr %54, align 8, !tbaa !12
  %56 = load i32, ptr %6, align 4, !tbaa !13
  %57 = sext i32 %56 to i64
  %58 = getelementptr inbounds double, ptr %55, i64 %57
  store double %53, ptr %58, align 8, !tbaa !14
  br label %59

59:                                               ; preds = %46
  %60 = load i32, ptr %6, align 4, !tbaa !13
  %61 = add nsw i32 %60, 1
  store i32 %61, ptr %6, align 4, !tbaa !13
  br label %40, !llvm.loop !16

62:                                               ; preds = %40
  %63 = load ptr, ptr %5, align 8, !tbaa !5
  %64 = getelementptr inbounds %class.vec, ptr %63, i32 0, i32 1
  %65 = load i32, ptr %64, align 8, !tbaa !9
  %66 = getelementptr inbounds %class.vec, ptr %7, i32 0, i32 1
  store i32 %65, ptr %66, align 8, !tbaa !9
  store ptr %7, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #7
  br label %67

67:                                               ; preds = %62, %10
  %68 = load ptr, ptr %3, align 8
  ret ptr %68
}

attributes #0 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { nobuiltin 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 #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nobuiltin nounwind "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 = { mustprogress 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 #5 = { builtin nounwind }
attributes #6 = { builtin allocsize(0) }
attributes #7 = { 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++ TBAA"}
!9 = !{!10, !11, i64 8}
!10 = !{!"_ZTS3vec", !6, i64 0, !11, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 0}
!13 = !{!11, !11, i64 0}
!14 = !{!15, !15, i64 0}
!15 = !{!"double", !7, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) local_unnamed_addr #0

; Function Attrs: nobuiltin nounwind
declare void @_ZdaPv(ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(12) ptr @_ZN3vecaSERKS_(ptr noundef nonnull returned align 8 dereferenceable(12) %0, ptr noundef nonnull readonly align 8 dereferenceable(12) %1) local_unnamed_addr #2 align 2 {
  %3 = icmp eq ptr %0, %1
  br i1 %3, label %49, label %4

4:                                                ; preds = %2
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load i32, ptr %5, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %1, i64 8
  %8 = load i32, ptr %7, align 8, !tbaa !5
  %.not = icmp eq i32 %6, %8
  br i1 %.not, label %19, label %9

9:                                                ; preds = %4
  %10 = load ptr, ptr %0, align 8, !tbaa !11
  %.not16 = icmp eq ptr %10, null
  br i1 %.not16, label %12, label %11

11:                                               ; preds = %9
  tail call void @_ZdaPv(ptr noundef nonnull %10) #3
  %.pre = load i32, ptr %7, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %11, %9
  %13 = phi i32 [ %.pre, %11 ], [ %8, %9 ]
  %14 = sext i32 %13 to i64
  %15 = icmp slt i32 %13, 0
  %16 = shl nsw i64 %14, 3
  %17 = select i1 %15, i64 -1, i64 %16
  %18 = tail call noalias noundef nonnull ptr @_Znam(i64 noundef %17) #4
  store ptr %18, ptr %0, align 8, !tbaa !11
  br label %19

19:                                               ; preds = %12, %4
  %20 = phi i32 [ %13, %12 ], [ %6, %4 ]
  %21 = icmp sgt i32 %20, 0
  br i1 %21, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %19
  %22 = load ptr, ptr %1, align 8, !tbaa !11
  %23 = load ptr, ptr %0, align 8, !tbaa !11
  %wide.trip.count = zext nneg i32 %20 to i64
  %min.iters.check = icmp ult i32 %20, 6
  %24 = ptrtoint ptr %23 to i64
  %25 = ptrtoint ptr %22 to i64
  %26 = sub i64 %24, %25
  %diff.check = icmp ult i64 %26, 32
  %or.cond = select i1 %min.iters.check, i1 true, i1 %diff.check
  br i1 %or.cond, label %scalar.ph.preheader, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph
  %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 ]
  %27 = getelementptr inbounds double, ptr %22, i64 %index
  %28 = getelementptr inbounds i8, ptr %27, i64 16
  %wide.load = load <2 x double>, ptr %27, align 8, !tbaa !12
  %wide.load19 = load <2 x double>, ptr %28, align 8, !tbaa !12
  %29 = getelementptr inbounds double, ptr %23, i64 %index
  %30 = getelementptr inbounds i8, ptr %29, i64 16
  store <2 x double> %wide.load, ptr %29, align 8, !tbaa !12
  store <2 x double> %wide.load19, ptr %30, align 8, !tbaa !12
  %index.next = add nuw i64 %index, 4
  %31 = icmp eq i64 %index.next, %n.vec
  br i1 %31, label %middle.block, label %vector.body, !llvm.loop !14

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

scalar.ph.preheader:                              ; preds = %middle.block, %.lr.ph
  %indvars.iv.ph = phi i64 [ 0, %.lr.ph ], [ %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 %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 ]
  %32 = getelementptr inbounds double, ptr %22, i64 %indvars.iv.prol
  %33 = load double, ptr %32, align 8, !tbaa !12
  %34 = getelementptr inbounds double, ptr %23, i64 %indvars.iv.prol
  store double %33, ptr %34, align 8, !tbaa !12
  %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 !18

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 ]
  %35 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %36 = icmp ugt i64 %35, -4
  br i1 %36, label %._crit_edge, 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 ]
  %37 = getelementptr inbounds double, ptr %22, i64 %indvars.iv
  %38 = load double, ptr %37, align 8, !tbaa !12
  %39 = getelementptr inbounds double, ptr %23, i64 %indvars.iv
  store double %38, ptr %39, align 8, !tbaa !12
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %40 = getelementptr inbounds double, ptr %22, i64 %indvars.iv.next
  %41 = load double, ptr %40, align 8, !tbaa !12
  %42 = getelementptr inbounds double, ptr %23, i64 %indvars.iv.next
  store double %41, ptr %42, align 8, !tbaa !12
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %43 = getelementptr inbounds double, ptr %22, i64 %indvars.iv.next.1
  %44 = load double, ptr %43, align 8, !tbaa !12
  %45 = getelementptr inbounds double, ptr %23, i64 %indvars.iv.next.1
  store double %44, ptr %45, align 8, !tbaa !12
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %46 = getelementptr inbounds double, ptr %22, i64 %indvars.iv.next.2
  %47 = load double, ptr %46, align 8, !tbaa !12
  %48 = getelementptr inbounds double, ptr %23, i64 %indvars.iv.next.2
  store double %47, ptr %48, align 8, !tbaa !12
  %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 %scalar.ph, !llvm.loop !20

._crit_edge:                                      ; preds = %scalar.ph.prol.loopexit, %scalar.ph, %middle.block, %19
  store i32 %20, ptr %5, align 8, !tbaa !5
  br label %49

49:                                               ; preds = %2, %._crit_edge
  ret ptr %0
}

attributes #0 = { nobuiltin 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 #1 = { nobuiltin nounwind "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 = { mustprogress 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 = { builtin nounwind }
attributes #4 = { builtin 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, !10, i64 8}
!6 = !{!"_ZTS3vec", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"double", !8, i64 0}
!14 = distinct !{!14, !15, !16, !17}
!15 = !{!"llvm.loop.mustprogress"}
!16 = !{!"llvm.loop.isvectorized", i32 1}
!17 = !{!"llvm.loop.unroll.runtime.disable"}
!18 = distinct !{!18, !19}
!19 = !{!"llvm.loop.unroll.disable"}
!20 = distinct !{!20, !15, !16}


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