https://github.com/jurahul updated
https://github.com/llvm/llvm-project/pull/115959
>From 04b7434139ffdb412797e9d4fe7d31ecbdbe7748 Mon Sep 17 00:00:00 2001
From: Rahul Joshi <rjo...@nvidia.com>
Date: Tue, 12 Nov 2024 15:38:02 -0800
Subject: [PATCH] [NFC][Clang] Use StringRef instead of string in
ClangDiagnosticEmitter
Use StringRef instead of std::string in ClangDiagnosticEmitter.
---
.../TableGen/ClangDiagnosticsEmitter.cpp | 79 ++++++++-----------
1 file changed, 32 insertions(+), 47 deletions(-)
diff --git a/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
b/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
index b7fd59090cd995..9aab37514d12b1 100644
--- a/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
+++ b/clang/utils/TableGen/ClangDiagnosticsEmitter.cpp
@@ -55,11 +55,11 @@ class DiagGroupParentMap {
};
} // end anonymous namespace.
-static std::string
+static StringRef
getCategoryFromDiagGroup(const Record *Group,
DiagGroupParentMap &DiagGroupParents) {
// If the DiagGroup has a category, return it.
- std::string CatName = std::string(Group->getValueAsString("CategoryName"));
+ StringRef CatName = Group->getValueAsString("CategoryName");
if (!CatName.empty()) return CatName;
// The diag group may the subgroup of one or more other diagnostic groups,
@@ -73,25 +73,26 @@ getCategoryFromDiagGroup(const Record *Group,
/// getDiagnosticCategory - Return the category that the specified diagnostic
/// lives in.
-static std::string getDiagnosticCategory(const Record *R,
- DiagGroupParentMap &DiagGroupParents)
{
+static StringRef getDiagnosticCategory(const Record *R,
+ DiagGroupParentMap &DiagGroupParents) {
// If the diagnostic is in a group, and that group has a category, use it.
if (const auto *Group = dyn_cast<DefInit>(R->getValueInit("Group"))) {
// Check the diagnostic's diag group for a category.
- std::string CatName = getCategoryFromDiagGroup(Group->getDef(),
- DiagGroupParents);
+ StringRef CatName =
+ getCategoryFromDiagGroup(Group->getDef(), DiagGroupParents);
if (!CatName.empty()) return CatName;
}
// If the diagnostic itself has a category, get it.
- return std::string(R->getValueAsString("CategoryName"));
+ return R->getValueAsString("CategoryName");
}
namespace {
class DiagCategoryIDMap {
const RecordKeeper &Records;
StringMap<unsigned> CategoryIDs;
- std::vector<std::string> CategoryStrings;
+ std::vector<StringRef> CategoryStrings;
+
public:
DiagCategoryIDMap(const RecordKeeper &records) : Records(records) {
DiagGroupParentMap ParentInfo(Records);
@@ -102,7 +103,7 @@ namespace {
for (const Record *Diag :
Records.getAllDerivedDefinitions("Diagnostic")) {
- std::string Category = getDiagnosticCategory(Diag, ParentInfo);
+ StringRef Category = getDiagnosticCategory(Diag, ParentInfo);
if (Category.empty()) continue; // Skip diags with no category.
unsigned &ID = CategoryIDs[Category];
@@ -117,7 +118,7 @@ namespace {
return CategoryIDs[CategoryString];
}
- typedef std::vector<std::string>::const_iterator const_iterator;
+ typedef std::vector<StringRef>::const_iterator const_iterator;
const_iterator begin() const { return CategoryStrings.begin(); }
const_iterator end() const { return CategoryStrings.end(); }
};
@@ -125,7 +126,7 @@ namespace {
struct GroupInfo {
StringRef GroupName;
std::vector<const Record*> DiagsInGroup;
- std::vector<std::string> SubGroups;
+ std::vector<StringRef> SubGroups;
unsigned IDNo = 0;
SmallVector<const Record *, 1> Defs;
@@ -145,7 +146,7 @@ static bool diagGroupBeforeByName(const Record *LHS, const
Record *RHS) {
RHS->getValueAsString("GroupName");
}
-using DiagsInGroupTy = std::map<std::string, GroupInfo, std::less<>>;
+using DiagsInGroupTy = std::map<StringRef, GroupInfo, std::less<>>;
/// Invert the 1-[0/1] mapping of diags to group into a one to many
/// mapping of groups to diags in the group.
@@ -158,16 +159,14 @@ static void groupDiagnostics(ArrayRef<const Record *>
Diags,
continue;
assert(R->getValueAsDef("Class")->getName() != "CLASS_NOTE" &&
"Note can't be in a DiagGroup");
- std::string GroupName =
- std::string(DI->getDef()->getValueAsString("GroupName"));
+ StringRef GroupName = DI->getDef()->getValueAsString("GroupName");
DiagsInGroup[GroupName].DiagsInGroup.push_back(R);
}
// Add all DiagGroup's to the DiagsInGroup list to make sure we pick up empty
// groups (these are warnings that GCC supports that clang never produces).
for (const Record *Group : DiagGroups) {
- GroupInfo &GI =
- DiagsInGroup[std::string(Group->getValueAsString("GroupName"))];
+ GroupInfo &GI = DiagsInGroup[Group->getValueAsString("GroupName")];
GI.GroupName = Group->getName();
GI.Defs.push_back(Group);
@@ -281,8 +280,7 @@ class InferPedantic {
} // end anonymous namespace
bool InferPedantic::isSubGroupOfGroup(const Record *Group, StringRef GName) {
- const std::string &GroupName =
- std::string(Group->getValueAsString("GroupName"));
+ StringRef GroupName = Group->getValueAsString("GroupName");
if (GName == GroupName)
return true;
@@ -307,8 +305,7 @@ bool InferPedantic::groupInPedantic(const Record *Group,
bool increment) {
GMap::mapped_type &V = GroupCount[Group];
// Lazily compute the threshold value for the group count.
if (!V.second) {
- const GroupInfo &GI =
- DiagsInGroup[std::string(Group->getValueAsString("GroupName"))];
+ const GroupInfo &GI = DiagsInGroup[Group->getValueAsString("GroupName")];
V.second = GI.SubGroups.size() + GI.DiagsInGroup.size();
}
@@ -1178,15 +1175,11 @@ std::string
DiagnosticTextBuilder::buildForDefinition(const Record *R) {
//===----------------------------------------------------------------------===//
static bool isError(const Record &Diag) {
- const std::string &ClsName =
- std::string(Diag.getValueAsDef("Class")->getName());
- return ClsName == "CLASS_ERROR";
+ return Diag.getValueAsDef("Class")->getName() == "CLASS_ERROR";
}
static bool isRemark(const Record &Diag) {
- const std::string &ClsName =
- std::string(Diag.getValueAsDef("Class")->getName());
- return ClsName == "CLASS_REMARK";
+ return Diag.getValueAsDef("Class")->getName() == "CLASS_REMARK";
}
// Presumes the text has been split at the first whitespace or hyphen.
@@ -1414,16 +1407,14 @@ void clang::EmitClangDiagsDefs(const RecordKeeper
&Records, raw_ostream &OS,
InferPedantic inferPedantic(DGParentMap, Diags, DiagGroups, DiagsInGroup);
inferPedantic.compute(&DiagsInPedantic, (RecordVec*)nullptr);
- for (unsigned i = 0, e = Diags.size(); i != e; ++i) {
- const Record &R = *Diags[i];
-
+ for (const Record *RP : Diags) {
+ const Record &R = *RP;
// Check if this is an error that is accidentally in a warning
// group.
if (isError(R)) {
if (const auto *Group = dyn_cast<DefInit>(R.getValueInit("Group"))) {
const Record *GroupRec = Group->getDef();
- const std::string &GroupName =
- std::string(GroupRec->getValueAsString("GroupName"));
+ StringRef GroupName = GroupRec->getValueAsString("GroupName");
PrintFatalError(R.getLoc(), "Error " + R.getName() +
" cannot be in a warning group [" + GroupName + "]");
}
@@ -1456,13 +1447,11 @@ void clang::EmitClangDiagsDefs(const RecordKeeper
&Records, raw_ostream &OS,
// Warning group associated with the diagnostic. This is stored as an index
// into the alphabetically sorted warning group table.
if (const auto *DI = dyn_cast<DefInit>(R.getValueInit("Group"))) {
- std::map<std::string, GroupInfo>::iterator I = DiagsInGroup.find(
- std::string(DI->getDef()->getValueAsString("GroupName")));
+ auto I = DiagsInGroup.find(DI->getDef()->getValueAsString("GroupName"));
assert(I != DiagsInGroup.end());
OS << ", " << I->second.IDNo;
} else if (DiagsInPedantic.count(&R)) {
- std::map<std::string, GroupInfo>::iterator I =
- DiagsInGroup.find("pedantic");
+ auto I = DiagsInGroup.find("pedantic");
assert(I != DiagsInGroup.end() && "pedantic group not defined");
OS << ", " << I->second.IDNo;
} else {
@@ -1532,10 +1521,10 @@ static void emitDiagSubGroups(DiagsInGroupTy
&DiagsInGroup,
<< " /* Empty */ -1,\n";
for (auto const &[Name, Group] : DiagsInGroup) {
const bool IsPedantic = Name == "pedantic";
- const std::vector<std::string> &SubGroups = Group.SubGroups;
+ const std::vector<StringRef> &SubGroups = Group.SubGroups;
if (!SubGroups.empty() || (IsPedantic && !GroupsInPedantic.empty())) {
OS << " /* DiagSubGroup" << Group.IDNo << " */ ";
- for (auto const &SubGroup : SubGroups) {
+ for (StringRef SubGroup : SubGroups) {
auto RI = DiagsInGroup.find(SubGroup);
assert(RI != DiagsInGroup.end() && "Referenced without existing?");
OS << RI->second.IDNo << ", ";
@@ -1543,8 +1532,7 @@ static void emitDiagSubGroups(DiagsInGroupTy
&DiagsInGroup,
// Emit the groups implicitly in "pedantic".
if (IsPedantic) {
for (auto const &Group : GroupsInPedantic) {
- const std::string &GroupName =
- std::string(Group->getValueAsString("GroupName"));
+ StringRef GroupName = Group->getValueAsString("GroupName");
auto RI = DiagsInGroup.find(GroupName);
assert(RI != DiagsInGroup.end() && "Referenced without existing?");
OS << RI->second.IDNo << ", ";
@@ -1677,7 +1665,7 @@ static void emitDiagTable(DiagsInGroupTy &DiagsInGroup,
PrintFatalError("Invalid character in diagnostic group '" + Name + "'");
OS << Name << " */, ";
// Store a pascal-style length byte at the beginning of the string.
- std::string PascalName = char(Name.size()) + Name;
+ std::string PascalName = char(Name.size()) + Name.str();
OS << *GroupNames.GetStringOffset(PascalName) << ", ";
// Special handling for 'pedantic'.
@@ -1698,7 +1686,7 @@ static void emitDiagTable(DiagsInGroupTy &DiagsInGroup,
}
// Subgroups.
- const std::vector<std::string> &SubGroups = GroupInfo.SubGroups;
+ const std::vector<StringRef> &SubGroups = GroupInfo.SubGroups;
const bool hasSubGroups =
!SubGroups.empty() || (IsPedantic && !GroupsInPedantic.empty());
if (hasSubGroups) {
@@ -1766,13 +1754,10 @@ void clang::EmitClangDiagGroups(const RecordKeeper
&Records, raw_ostream &OS) {
inferPedantic.compute(&DiagsInPedantic, &GroupsInPedantic);
StringToOffsetTable GroupNames;
- for (std::map<std::string, GroupInfo>::const_iterator
- I = DiagsInGroup.begin(),
- E = DiagsInGroup.end();
- I != E; ++I) {
+ for (const auto &[Name, Group] : DiagsInGroup) {
// Store a pascal-style length byte at the beginning of the string.
- std::string Name = char(I->first.size()) + I->first;
- GroupNames.GetOrAddStringOffset(Name, false);
+ std::string PascalName = char(Name.size()) + Name.str();
+ GroupNames.GetOrAddStringOffset(PascalName, false);
}
emitAllDiagArrays(DiagsInGroup, DiagsInPedantic, GroupsInPedantic,
GroupNames,
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