; LLVM IR from Ubpa/USTC_CG :: Homeworks/0_CppPratices/samples/src/executables/1_BasicDArray (DArray)

; 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.DArray = 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 void @_ZN6DArray8PushBackEd(ptr noundef nonnull align 8 dereferenceable(12) %0, double noundef %1) #4 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca double, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store double %1, ptr %4, align 8, !tbaa !9
  %7 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %8 = getelementptr inbounds %class.DArray, ptr %7, i32 0, i32 1
  %9 = load i32, ptr %8, align 8, !tbaa !11
  %10 = sext i32 %9 to i64
  %11 = add i64 %10, 1
  %12 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %11, i64 8)
  %13 = extractvalue { i64, i1 } %12, 1
  %14 = extractvalue { i64, i1 } %12, 0
  %15 = select i1 %13, i64 -1, i64 %14
  %16 = call noalias noundef nonnull ptr @_Znam(i64 noundef %15) #6
  store ptr %16, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 0, ptr %6, align 4, !tbaa !14
  br label %17

17:                                               ; preds = %34, %2
  %18 = load i32, ptr %6, align 4, !tbaa !14
  %19 = getelementptr inbounds %class.DArray, ptr %7, i32 0, i32 1
  %20 = load i32, ptr %19, align 8, !tbaa !11
  %21 = icmp slt i32 %18, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  br label %37

23:                                               ; preds = %17
  %24 = getelementptr inbounds %class.DArray, ptr %7, i32 0, i32 0
  %25 = load ptr, ptr %24, align 8, !tbaa !15
  %26 = load i32, ptr %6, align 4, !tbaa !14
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds double, ptr %25, i64 %27
  %29 = load double, ptr %28, align 8, !tbaa !9
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = load i32, ptr %6, align 4, !tbaa !14
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds double, ptr %30, i64 %32
  store double %29, ptr %33, align 8, !tbaa !9
  br label %34

34:                                               ; preds = %23
  %35 = load i32, ptr %6, align 4, !tbaa !14
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %6, align 4, !tbaa !14
  br label %17, !llvm.loop !16

37:                                               ; preds = %22
  %38 = load double, ptr %4, align 8, !tbaa !9
  %39 = load ptr, ptr %5, align 8, !tbaa !5
  %40 = getelementptr inbounds %class.DArray, ptr %7, i32 0, i32 1
  %41 = load i32, ptr %40, align 8, !tbaa !11
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds double, ptr %39, i64 %42
  store double %38, ptr %43, align 8, !tbaa !9
  %44 = getelementptr inbounds %class.DArray, ptr %7, i32 0, i32 0
  %45 = load ptr, ptr %44, align 8, !tbaa !15
  %46 = icmp eq ptr %45, null
  br i1 %46, label %48, label %47

47:                                               ; preds = %37
  call void @_ZdaPv(ptr noundef %45) #7
  br label %48

48:                                               ; preds = %47, %37
  %49 = load ptr, ptr %5, align 8, !tbaa !5
  %50 = getelementptr inbounds %class.DArray, ptr %7, i32 0, i32 0
  store ptr %49, ptr %50, align 8, !tbaa !15
  %51 = getelementptr inbounds %class.DArray, ptr %7, i32 0, i32 1
  %52 = load i32, ptr %51, align 8, !tbaa !11
  %53 = add nsw i32 %52, 1
  store i32 %53, ptr %51, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  ret void
}

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 = { nounwind }
attributes #6 = { builtin allocsize(0) }
attributes #7 = { builtin 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, !10, i64 0}
!10 = !{!"double", !7, i64 0}
!11 = !{!12, !13, i64 8}
!12 = !{!"_ZTS6DArray", !6, i64 0, !13, i64 8}
!13 = !{!"int", !7, i64 0}
!14 = !{!13, !13, i64 0}
!15 = !{!12, !6, 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 void @_ZN6DArray8PushBackEd(ptr nocapture noundef nonnull align 8 dereferenceable(12) %0, double noundef %1) local_unnamed_addr #2 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load i32, ptr %3, align 8, !tbaa !5
  %5 = sext i32 %4 to i64
  %6 = add nsw i64 %5, 1
  %7 = icmp ugt i64 %6, 2305843009213693951
  %8 = shl nsw i64 %6, 3
  %9 = select i1 %7, i64 -1, i64 %8
  %10 = tail call noalias noundef nonnull ptr @_Znam(i64 noundef %9) #3
  %11 = icmp sgt i32 %4, 0
  %.pre = load ptr, ptr %0, align 8, !tbaa !11
  br i1 %11, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2
  %.pre13 = ptrtoint ptr %.pre to i64
  %12 = ptrtoint ptr %10 to i64
  %wide.trip.count = zext nneg i32 %4 to i64
  %min.iters.check = icmp ult i32 %4, 6
  %13 = sub i64 %12, %.pre13
  %diff.check = icmp ult i64 %13, 32
  %or.cond = select i1 %min.iters.check, i1 true, i1 %diff.check
  br i1 %or.cond, label %scalar.ph.preheader, label %vector.ph

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 ]
  %14 = getelementptr inbounds double, ptr %.pre, i64 %indvars.iv.prol
  %15 = load double, ptr %14, align 8, !tbaa !12
  %16 = getelementptr inbounds double, ptr %10, i64 %indvars.iv.prol
  store double %15, ptr %16, 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 !14

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 ]
  %17 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %18 = icmp ugt i64 %17, -4
  br i1 %18, label %._crit_edge.thread, label %scalar.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 ]
  %19 = getelementptr inbounds double, ptr %.pre, i64 %index
  %20 = getelementptr inbounds i8, ptr %19, i64 16
  %wide.load = load <2 x double>, ptr %19, align 8, !tbaa !12
  %wide.load14 = load <2 x double>, ptr %20, align 8, !tbaa !12
  %21 = getelementptr inbounds double, ptr %10, i64 %index
  %22 = getelementptr inbounds i8, ptr %21, i64 16
  store <2 x double> %wide.load, ptr %21, align 8, !tbaa !12
  store <2 x double> %wide.load14, ptr %22, align 8, !tbaa !12
  %index.next = add nuw i64 %index, 4
  %23 = icmp eq i64 %index.next, %n.vec
  br i1 %23, label %middle.block, label %vector.body, !llvm.loop !16

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

._crit_edge:                                      ; preds = %2
  %24 = getelementptr inbounds double, ptr %10, i64 %5
  store double %1, ptr %24, align 8, !tbaa !12
  %25 = icmp eq ptr %.pre, null
  br i1 %25, label %40, label %39

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 ]
  %26 = getelementptr inbounds double, ptr %.pre, i64 %indvars.iv
  %27 = load double, ptr %26, align 8, !tbaa !12
  %28 = getelementptr inbounds double, ptr %10, i64 %indvars.iv
  store double %27, ptr %28, align 8, !tbaa !12
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %29 = getelementptr inbounds double, ptr %.pre, i64 %indvars.iv.next
  %30 = load double, ptr %29, align 8, !tbaa !12
  %31 = getelementptr inbounds double, ptr %10, i64 %indvars.iv.next
  store double %30, ptr %31, align 8, !tbaa !12
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %32 = getelementptr inbounds double, ptr %.pre, i64 %indvars.iv.next.1
  %33 = load double, ptr %32, align 8, !tbaa !12
  %34 = getelementptr inbounds double, ptr %10, i64 %indvars.iv.next.1
  store double %33, ptr %34, align 8, !tbaa !12
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %35 = getelementptr inbounds double, ptr %.pre, i64 %indvars.iv.next.2
  %36 = load double, ptr %35, align 8, !tbaa !12
  %37 = getelementptr inbounds double, ptr %10, i64 %indvars.iv.next.2
  store double %36, ptr %37, 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.thread, label %scalar.ph, !llvm.loop !20

._crit_edge.thread:                               ; preds = %scalar.ph.prol.loopexit, %scalar.ph, %middle.block
  %38 = getelementptr inbounds double, ptr %10, i64 %5
  store double %1, ptr %38, align 8, !tbaa !12
  br label %39

39:                                               ; preds = %._crit_edge.thread, %._crit_edge
  tail call void @_ZdaPv(ptr noundef nonnull %.pre) #4
  %.pre12 = load i32, ptr %3, align 8, !tbaa !5
  br label %40

40:                                               ; preds = %39, %._crit_edge
  %41 = phi i32 [ %.pre12, %39 ], [ %4, %._crit_edge ]
  store ptr %10, ptr %0, align 8, !tbaa !11
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %3, align 8, !tbaa !5
  ret void
}

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 allocsize(0) }
attributes #4 = { builtin 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, !10, i64 8}
!6 = !{!"_ZTS6DArray", !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}
!15 = !{!"llvm.loop.unroll.disable"}
!16 = distinct !{!16, !17, !18, !19}
!17 = !{!"llvm.loop.mustprogress"}
!18 = !{!"llvm.loop.isvectorized", i32 1}
!19 = !{!"llvm.loop.unroll.runtime.disable"}
!20 = distinct !{!20, !17, !18}


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