vendor/llvm-project/llvmorg-12-init-17869-g8e464dd76bef

4 files changed, 22 insertions, 14 deletions

diff --git a/lldb/source/Plugins/Language/CPlusPlus/BlockPointer.cpp b/lldb/source/Plugins/Language/CPlusPlus/BlockPointer.cpp
index 42f6bd9ffb7b..35788a6445c2 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/BlockPointer.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/BlockPointer.cpp
@@ -50,11 +50,7 @@ public:
     }
 
     TypeSystemClang *clang_ast_context =
-        llvm::dyn_cast<TypeSystemClang>(&type_system_or_err.get());
-
-    if (!clang_ast_context) {
-      return;
-    }
+        llvm::cast<TypeSystemClang>(block_pointer_type.GetTypeSystem());
 
     std::shared_ptr<ClangASTImporter> clang_ast_importer;
     auto *state = target_sp->GetPersistentExpressionStateForLanguage(
diff --git a/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp b/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
index 08e43ae6b3e8..d844498fd8a3 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
@@ -601,8 +601,7 @@ static void LoadLibCxxFormatters(lldb::TypeCategoryImplSP cpp_category_sp) {
       ConstString("^std::__[[:alnum:]]+::atomic<.+>$"), stl_synth_flags, true);
 
   cpp_category_sp->GetRegexTypeSyntheticsContainer()->Add(
-      RegularExpression(
-          llvm::StringRef("^(std::__[[:alnum:]]+::)deque<.+>(( )?&)?$")),
+      RegularExpression("^(std::__[[:alnum:]]+::)deque<.+>(( )?&)?$"),
       SyntheticChildrenSP(new ScriptedSyntheticChildren(
           stl_synth_flags,
           "lldb.formatters.cpp.libcxx.stddeque_SynthProvider")));
@@ -823,32 +822,32 @@ static void LoadLibStdcppFormatters(lldb::TypeCategoryImplSP cpp_category_sp) {
       false);
 
   cpp_category_sp->GetRegexTypeSyntheticsContainer()->Add(
-      RegularExpression(llvm::StringRef("^std::vector<.+>(( )?&)?$")),
+      RegularExpression("^std::vector<.+>(( )?&)?$"),
       SyntheticChildrenSP(new ScriptedSyntheticChildren(
           stl_synth_flags,
           "lldb.formatters.cpp.gnu_libstdcpp.StdVectorSynthProvider")));
   cpp_category_sp->GetRegexTypeSyntheticsContainer()->Add(
-      RegularExpression(llvm::StringRef("^std::map<.+> >(( )?&)?$")),
+      RegularExpression("^std::map<.+> >(( )?&)?$"),
       SyntheticChildrenSP(new ScriptedSyntheticChildren(
           stl_synth_flags,
           "lldb.formatters.cpp.gnu_libstdcpp.StdMapSynthProvider")));
   cpp_category_sp->GetRegexTypeSyntheticsContainer()->Add(
-      RegularExpression(llvm::StringRef("^std::(__cxx11::)?list<.+>(( )?&)?$")),
+      RegularExpression("^std::(__cxx11::)?list<.+>(( )?&)?$"),
       SyntheticChildrenSP(new ScriptedSyntheticChildren(
           stl_synth_flags,
           "lldb.formatters.cpp.gnu_libstdcpp.StdListSynthProvider")));
   stl_summary_flags.SetDontShowChildren(false);
   stl_summary_flags.SetSkipPointers(true);
   cpp_category_sp->GetRegexTypeSummariesContainer()->Add(
-      RegularExpression(llvm::StringRef("^std::vector<.+>(( )?&)?$")),
+      RegularExpression("^std::vector<.+>(( )?&)?$"),
       TypeSummaryImplSP(
           new StringSummaryFormat(stl_summary_flags, "size=${svar%#}")));
   cpp_category_sp->GetRegexTypeSummariesContainer()->Add(
-      RegularExpression(llvm::StringRef("^std::map<.+> >(( )?&)?$")),
+      RegularExpression("^std::map<.+> >(( )?&)?$"),
       TypeSummaryImplSP(
           new StringSummaryFormat(stl_summary_flags, "size=${svar%#}")));
   cpp_category_sp->GetRegexTypeSummariesContainer()->Add(
-      RegularExpression(llvm::StringRef("^std::(__cxx11::)?list<.+>(( )?&)?$")),
+      RegularExpression("^std::(__cxx11::)?list<.+>(( )?&)?$"),
       TypeSummaryImplSP(
           new StringSummaryFormat(stl_summary_flags, "size=${svar%#}")));
 
@@ -1135,6 +1134,15 @@ CPlusPlusLanguage::GetHardcodedSynthetics() {
   return g_formatters;
 }
 
+bool CPlusPlusLanguage::IsNilReference(ValueObject &valobj) {
+  if (!Language::LanguageIsCPlusPlus(valobj.GetObjectRuntimeLanguage()) ||
+      !valobj.IsPointerType())
+    return false;
+  bool canReadValue = true;
+  bool isZero = valobj.GetValueAsUnsigned(0, &canReadValue) == 0;
+  return canReadValue && isZero;
+}
+
 bool CPlusPlusLanguage::IsSourceFile(llvm::StringRef file_path) const {
   const auto suffixes = {".cpp", ".cxx", ".c++", ".cc",  ".c",
                          ".h",   ".hh",  ".hpp", ".hxx", ".h++"};
diff --git a/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h b/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h
index 89dea08a2c53..e2b5d2918753 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h
+++ b/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.h
@@ -88,6 +88,10 @@ public:
   HardcodedFormatters::HardcodedSyntheticFinder
   GetHardcodedSynthetics() override;
 
+  bool IsNilReference(ValueObject &valobj) override;
+
+  llvm::StringRef GetNilReferenceSummaryString() override { return "nullptr"; }
+
   bool IsSourceFile(llvm::StringRef file_path) const override;
 
   const Highlighter *GetHighlighter() const override { return &m_highlighter; }
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
index 84dd09a47d8a..2b16ebe79daf 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
@@ -692,7 +692,7 @@ bool lldb_private::formatters::LibcxxWStringSummaryProvider(
 
   // std::wstring::size() is measured in 'characters', not bytes
   TypeSystemClang *ast_context =
-      TypeSystemClang::GetScratch(*valobj.GetTargetSP());
+      ScratchTypeSystemClang::GetForTarget(*valobj.GetTargetSP());
   if (!ast_context)
     return false;