; 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 @_ZN6DArray7SetSizeEi(ptr noundef nonnull align 8 dereferenceable(12) %0, i32 noundef %1) #4 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %9 = load ptr, ptr %3, align 8
  %10 = getelementptr inbounds %class.DArray, ptr %9, i32 0, i32 1
  %11 = load i32, ptr %10, align 8, !tbaa !11
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = icmp eq i32 %11, %12
  br i1 %13, label %14, label %15

14:                                               ; preds = %2
  br label %78

15:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %16 = load i32, ptr %4, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %17, i64 8)
  %19 = extractvalue { i64, i1 } %18, 1
  %20 = extractvalue { i64, i1 } %18, 0
  %21 = select i1 %19, i64 -1, i64 %20
  %22 = call noalias noundef nonnull ptr @_Znam(i64 noundef %21) #6
  store ptr %22, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  %23 = load i32, ptr %4, align 4, !tbaa !9
  %24 = getelementptr inbounds %class.DArray, ptr %9, i32 0, i32 1
  %25 = load i32, ptr %24, align 8, !tbaa !11
  %26 = icmp slt i32 %23, %25
  br i1 %26, label %27, label %29

27:                                               ; preds = %15
  %28 = load i32, ptr %4, align 4, !tbaa !9
  br label %32

29:                                               ; preds = %15
  %30 = getelementptr inbounds %class.DArray, ptr %9, i32 0, i32 1
  %31 = load i32, ptr %30, align 8, !tbaa !11
  br label %32

32:                                               ; preds = %29, %27
  %33 = phi i32 [ %28, %27 ], [ %31, %29 ]
  store i32 %33, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %34

34:                                               ; preds = %50, %32
  %35 = load i32, ptr %7, align 4, !tbaa !9
  %36 = load i32, ptr %6, align 4, !tbaa !9
  %37 = icmp slt i32 %35, %36
  br i1 %37, label %39, label %38

38:                                               ; preds = %34
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  br label %53

39:                                               ; preds = %34
  %40 = getelementptr inbounds %class.DArray, ptr %9, i32 0, i32 0
  %41 = load ptr, ptr %40, align 8, !tbaa !13
  %42 = load i32, ptr %7, align 4, !tbaa !9
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds double, ptr %41, i64 %43
  %45 = load double, ptr %44, align 8, !tbaa !14
  %46 = load ptr, ptr %5, align 8, !tbaa !5
  %47 = load i32, ptr %7, align 4, !tbaa !9
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds double, ptr %46, i64 %48
  store double %45, ptr %49, align 8, !tbaa !14
  br label %50

50:                                               ; preds = %39
  %51 = load i32, ptr %7, align 4, !tbaa !9
  %52 = add nsw i32 %51, 1
  store i32 %52, ptr %7, align 4, !tbaa !9
  br label %34, !llvm.loop !16

53:                                               ; preds = %38
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #5
  %54 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %54, ptr %8, align 4, !tbaa !9
  br label %55

55:                                               ; preds = %65, %53
  %56 = load i32, ptr %8, align 4, !tbaa !9
  %57 = load i32, ptr %4, align 4, !tbaa !9
  %58 = icmp slt i32 %56, %57
  br i1 %58, label %60, label %59

59:                                               ; preds = %55
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #5
  br label %68

60:                                               ; preds = %55
  %61 = load ptr, ptr %5, align 8, !tbaa !5
  %62 = load i32, ptr %8, align 4, !tbaa !9
  %63 = sext i32 %62 to i64
  %64 = getelementptr inbounds double, ptr %61, i64 %63
  store double 0.000000e+00, ptr %64, align 8, !tbaa !14
  br label %65

65:                                               ; preds = %60
  %66 = load i32, ptr %8, align 4, !tbaa !9
  %67 = add nsw i32 %66, 1
  store i32 %67, ptr %8, align 4, !tbaa !9
  br label %55, !llvm.loop !18

68:                                               ; preds = %59
  %69 = getelementptr inbounds %class.DArray, ptr %9, i32 0, i32 0
  %70 = load ptr, ptr %69, align 8, !tbaa !13
  %71 = icmp eq ptr %70, null
  br i1 %71, label %73, label %72

72:                                               ; preds = %68
  call void @_ZdaPv(ptr noundef %70) #7
  br label %73

73:                                               ; preds = %72, %68
  %74 = load ptr, ptr %5, align 8, !tbaa !5
  %75 = getelementptr inbounds %class.DArray, ptr %9, i32 0, i32 0
  store ptr %74, ptr %75, align 8, !tbaa !13
  %76 = load i32, ptr %4, align 4, !tbaa !9
  %77 = getelementptr inbounds %class.DArray, ptr %9, i32 0, i32 1
  store i32 %76, ptr %77, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  br label %78

78:                                               ; preds = %73, %14
  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 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"_ZTS6DArray", !6, i64 0, !10, i64 8}
!13 = !{!12, !6, i64 0}
!14 = !{!15, !15, i64 0}
!15 = !{!"double", !7, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}
!18 = distinct !{!18, !17}


; 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 @_ZN6DArray7SetSizeEi(ptr nocapture noundef nonnull align 8 dereferenceable(12) %0, i32 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 = icmp eq i32 %4, %1
  br i1 %5, label %51, label %6

6:                                                ; preds = %2
  %7 = zext nneg i32 %1 to i64
  %8 = icmp slt i32 %1, 0
  %9 = shl nuw nsw i64 %7, 3
  %10 = select i1 %8, i64 -1, i64 %9
  %11 = tail call noalias noundef nonnull ptr @_Znam(i64 noundef %10) #5
  %. = tail call i32 @llvm.smin.i32(i32 %4, i32 %1)
  %12 = icmp sgt i32 %., 0
  br i1 %12, label %.lr.ph, label %.preheader

.lr.ph:                                           ; preds = %6
  %13 = ptrtoint ptr %11 to i64
  %14 = load ptr, ptr %0, align 8, !tbaa !11
  %wide.trip.count = zext nneg i32 %. to i64
  %min.iters.check = icmp ult i32 %., 6
  %15 = ptrtoint ptr %14 to i64
  %16 = sub i64 %13, %15
  %diff.check = icmp ult i64 %16, 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 ]
  %17 = getelementptr inbounds double, ptr %14, i64 %indvars.iv.prol
  %18 = load double, ptr %17, align 8, !tbaa !12
  %19 = getelementptr inbounds double, ptr %11, i64 %indvars.iv.prol
  store double %18, ptr %19, 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 ]
  %20 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %21 = icmp ugt i64 %20, -4
  br i1 %21, label %.preheader, 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 ]
  %22 = getelementptr inbounds double, ptr %14, i64 %index
  %23 = getelementptr inbounds i8, ptr %22, i64 16
  %wide.load = load <2 x double>, ptr %22, align 8, !tbaa !12
  %wide.load30 = load <2 x double>, ptr %23, align 8, !tbaa !12
  %24 = getelementptr inbounds double, ptr %11, i64 %index
  %25 = getelementptr inbounds i8, ptr %24, i64 16
  store <2 x double> %wide.load, ptr %24, align 8, !tbaa !12
  store <2 x double> %wide.load30, ptr %25, align 8, !tbaa !12
  %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 !16

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

.preheader:                                       ; preds = %scalar.ph.prol.loopexit, %scalar.ph, %middle.block, %6
  %27 = icmp slt i32 %4, %1
  br i1 %27, label %.lr.ph25.preheader, label %._crit_edge

.lr.ph25.preheader:                               ; preds = %.preheader
  %28 = sext i32 %4 to i64
  %29 = shl nsw i64 %28, 3
  %scevgep = getelementptr i8, ptr %11, i64 %29
  %30 = xor i32 %., -1
  %31 = add i32 %30, %1
  %32 = zext i32 %31 to i64
  %33 = shl nuw nsw i64 %32, 3
  %34 = add nuw nsw i64 %33, 8
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(1) %scevgep, i8 0, i64 %34, i1 false), !tbaa !12
  br label %._crit_edge

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 ]
  %35 = getelementptr inbounds double, ptr %14, i64 %indvars.iv
  %36 = load double, ptr %35, align 8, !tbaa !12
  %37 = getelementptr inbounds double, ptr %11, i64 %indvars.iv
  store double %36, ptr %37, align 8, !tbaa !12
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %38 = getelementptr inbounds double, ptr %14, i64 %indvars.iv.next
  %39 = load double, ptr %38, align 8, !tbaa !12
  %40 = getelementptr inbounds double, ptr %11, i64 %indvars.iv.next
  store double %39, ptr %40, align 8, !tbaa !12
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %41 = getelementptr inbounds double, ptr %14, i64 %indvars.iv.next.1
  %42 = load double, ptr %41, align 8, !tbaa !12
  %43 = getelementptr inbounds double, ptr %11, i64 %indvars.iv.next.1
  store double %42, ptr %43, align 8, !tbaa !12
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %44 = getelementptr inbounds double, ptr %14, i64 %indvars.iv.next.2
  %45 = load double, ptr %44, align 8, !tbaa !12
  %46 = getelementptr inbounds double, ptr %11, i64 %indvars.iv.next.2
  store double %45, ptr %46, 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 %.preheader, label %scalar.ph, !llvm.loop !20

._crit_edge:                                      ; preds = %.lr.ph25.preheader, %.preheader
  %47 = load ptr, ptr %0, align 8, !tbaa !11
  %48 = icmp eq ptr %47, null
  br i1 %48, label %50, label %49

49:                                               ; preds = %._crit_edge
  tail call void @_ZdaPv(ptr noundef nonnull %47) #6
  br label %50

50:                                               ; preds = %49, %._crit_edge
  store ptr %11, ptr %0, align 8, !tbaa !11
  store i32 %1, ptr %3, align 8, !tbaa !5
  br label %51

51:                                               ; preds = %2, %50
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #3

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { builtin allocsize(0) }
attributes #6 = { 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: BDCEPass,CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopIdiomRecognizePass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass