; LLVM IR from ERGO-Code/HiGHS :: src/ipm/ipx/indexed_vector.ll (ZN3ipx13IndexedVector11set_to_zeroEv)

; 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.ipx::IndexedVector" = type <{ %"class.std::valarray", %"class.std::vector", i32, [4 x i8] }>
%"class.std::valarray" = type { i64, ptr }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; 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: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZNK3ipx13IndexedVector6sparseEv(ptr noundef nonnull align 8 dereferenceable(44)) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3ipx13IndexedVector11set_to_zeroEv(ptr noundef nonnull align 8 dereferenceable(44) %0) #1 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca double, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  %6 = call noundef zeroext i1 @_ZNK3ipx13IndexedVector6sparseEv(ptr noundef nonnull align 8 dereferenceable(44) %5)
  br i1 %6, label %7, label %27

7:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %23, %7
  %9 = load i32, ptr %3, align 4, !tbaa !9
  %10 = getelementptr inbounds %"class.ipx::IndexedVector", ptr %5, i32 0, i32 2
  %11 = load i32, ptr %10, align 8, !tbaa !11
  %12 = icmp slt i32 %9, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  br label %26

14:                                               ; preds = %8
  %15 = getelementptr inbounds %"class.ipx::IndexedVector", ptr %5, i32 0, i32 0
  %16 = getelementptr inbounds %"class.ipx::IndexedVector", ptr %5, i32 0, i32 1
  %17 = load i32, ptr %3, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %16, i64 noundef %18) #5
  %20 = load i32, ptr %19, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt8valarrayIdEixEm(ptr noundef nonnull align 8 dereferenceable(16) %15, i64 noundef %21) #5
  store double 0.000000e+00, ptr %22, align 8, !tbaa !19
  br label %23

23:                                               ; preds = %14
  %24 = load i32, ptr %3, align 4, !tbaa !9
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %3, align 4, !tbaa !9
  br label %8, !llvm.loop !21

26:                                               ; preds = %13
  br label %30

27:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  store double 0.000000e+00, ptr %4, align 8, !tbaa !19
  %28 = getelementptr inbounds %"class.ipx::IndexedVector", ptr %5, i32 0, i32 0
  %29 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt8valarrayIdEaSERKd(ptr noundef nonnull align 8 dereferenceable(16) %28, ptr noundef nonnull align 8 dereferenceable(8) %4)
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  br label %30

30:                                               ; preds = %27, %26
  %31 = getelementptr inbounds %"class.ipx::IndexedVector", ptr %5, i32 0, i32 2
  store i32 0, ptr %31, align 8, !tbaa !11
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt8valarrayIdEixEm(ptr noundef nonnull align 8 dereferenceable(16), i64 noundef) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #3 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt8valarrayIdEaSERKd(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(8)) #4 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { inlinehint mustprogress 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 #3 = { mustprogress 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 #4 = { inlinehint 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 }

!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 40}
!12 = !{!"_ZTSN3ipx13IndexedVectorE", !13, i64 0, !15, i64 16, !10, i64 40}
!13 = !{!"_ZTSSt8valarrayIdE", !14, i64 0, !6, i64 8}
!14 = !{!"long", !7, i64 0}
!15 = !{!"_ZTSSt6vectorIiSaIiEE", !16, i64 0}
!16 = !{!"_ZTSSt12_Vector_baseIiSaIiEE", !17, i64 0}
!17 = !{!"_ZTSNSt12_Vector_baseIiSaIiEE12_Vector_implE", !18, i64 0}
!18 = !{!"_ZTSNSt12_Vector_baseIiSaIiEE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}
!19 = !{!20, !20, i64 0}
!20 = !{!"double", !7, i64 0}
!21 = distinct !{!21, !22}
!22 = !{!"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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZNK3ipx13IndexedVector6sparseEv(ptr noundef nonnull align 8 dereferenceable(44)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN3ipx13IndexedVector11set_to_zeroEv(ptr noundef nonnull align 8 dereferenceable(44) %0) local_unnamed_addr #1 align 2 {
  %2 = alloca double, align 8
  %3 = tail call noundef zeroext i1 @_ZNK3ipx13IndexedVector6sparseEv(ptr noundef nonnull align 8 dereferenceable(44) %0)
  br i1 %3, label %.preheader, label %16

.preheader:                                       ; preds = %1
  %4 = getelementptr inbounds i8, ptr %0, i64 40
  %5 = load i32, ptr %4, align 8, !tbaa !5
  %6 = icmp sgt i32 %5, 0
  br i1 %6, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %.preheader
  %7 = getelementptr inbounds i8, ptr %0, i64 16
  br label %8

8:                                                ; preds = %.lr.ph, %8
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %8 ]
  %9 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %7, i64 noundef %indvars.iv) #5
  %10 = load i32, ptr %9, align 4, !tbaa !17
  %11 = sext i32 %10 to i64
  %12 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt8valarrayIdEixEm(ptr noundef nonnull align 8 dereferenceable(16) %0, i64 noundef %11) #5
  store double 0.000000e+00, ptr %12, align 8, !tbaa !18
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %13 = load i32, ptr %4, align 8, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = icmp slt i64 %indvars.iv.next, %14
  br i1 %15, label %8, label %.loopexit, !llvm.loop !20

16:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #5
  store double 0.000000e+00, ptr %2, align 8, !tbaa !18
  %17 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt8valarrayIdEaSERKd(ptr noundef nonnull align 8 dereferenceable(16) %0, ptr noundef nonnull align 8 dereferenceable(8) %2)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #5
  br label %.loopexit

.loopexit:                                        ; preds = %8, %.preheader, %16
  %18 = getelementptr inbounds i8, ptr %0, i64 40
  store i32 0, ptr %18, align 8, !tbaa !5
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt8valarrayIdEixEm(ptr noundef nonnull align 8 dereferenceable(16), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #3 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt8valarrayIdEaSERKd(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #4 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { inlinehint mustprogress 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 #3 = { mustprogress 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 #4 = { inlinehint 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 }

!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, !16, i64 40}
!6 = !{!"_ZTSN3ipx13IndexedVectorE", !7, i64 0, !12, i64 16, !16, i64 40}
!7 = !{!"_ZTSSt8valarrayIdE", !8, i64 0, !11, i64 8}
!8 = !{!"long", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = !{!"any pointer", !9, i64 0}
!12 = !{!"_ZTSSt6vectorIiSaIiEE", !13, i64 0}
!13 = !{!"_ZTSSt12_Vector_baseIiSaIiEE", !14, i64 0}
!14 = !{!"_ZTSNSt12_Vector_baseIiSaIiEE12_Vector_implE", !15, i64 0}
!15 = !{!"_ZTSNSt12_Vector_baseIiSaIiEE17_Vector_impl_dataE", !11, i64 0, !11, i64 8, !11, i64 16}
!16 = !{!"int", !9, i64 0}
!17 = !{!16, !16, i64 0}
!18 = !{!19, !19, i64 0}
!19 = !{!"double", !9, i64 0}
!20 = distinct !{!20, !21}
!21 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass