Replace the StringSwitch in AttributeList::getKind() with a
TableGen-generated StringMatcher, for a 1.2% speedup in -fparse-only
time in <rdar://problem/11004361>. Thanks to Benjamin for pointing me
at StringMatcher!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156003 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/ClangAttrEmitter.cpp b/utils/TableGen/ClangAttrEmitter.cpp
index 112d9a5..4177660 100644
--- a/utils/TableGen/ClangAttrEmitter.cpp
+++ b/utils/TableGen/ClangAttrEmitter.cpp
@@ -14,6 +14,7 @@
#include "ClangAttrEmitter.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/TableGen/Record.h"
+#include "llvm/TableGen/StringMatcher.h"
#include <algorithm>
#include <cctype>
#include <set>
@@ -1085,9 +1086,11 @@
void ClangAttrParsedAttrKindsEmitter::run(raw_ostream &OS) {
OS << "// This file is generated by TableGen. Do not edit.\n\n";
-
+ OS << "\n";
+
std::vector<Record*> Attrs = Records.getAllDerivedDefinitions("Attr");
+ std::vector<StringMatcher::StringPair> Matches;
for (std::vector<Record*>::iterator I = Attrs.begin(), E = Attrs.end();
I != E; ++I) {
Record &Attr = **I;
@@ -1107,12 +1110,23 @@
Spelling = NormalizeAttrSpelling(Spelling);
if (SemaHandler)
- OS << ".Case(\"" << Spelling << "\", " << "AT_" << AttrName << ")\n";
+ Matches.push_back(
+ StringMatcher::StringPair(Spelling,
+ std::string("return AttributeList::AT_") +
+ AttrName.str() + ";"));
else
- OS << ".Case(\"" << Spelling << "\", IgnoredAttribute)\n";
+ Matches.push_back(
+ StringMatcher::StringPair(
+ Spelling,
+ std::string("return AttributeList::IgnoredAttribute;")));
}
}
}
+
+ OS << "static AttributeList::Kind getAttrKind(StringRef Name) {\n";
+ StringMatcher("Name", Matches, OS).Emit();
+ OS << "return AttributeList::UnknownAttribute;\n"
+ << "}\n";
}