Replace push_back(Constructor(foo)) with emplace_back(foo) for non-trivial types
If the type isn't trivially moveable emplace can skip a potentially
expensive move. It also saves a couple of characters.
Call sites were found with the ASTMatcher + some semi-automated cleanup.
memberCallExpr(
argumentCountIs(1), callee(methodDecl(hasName("push_back"))),
on(hasType(recordDecl(has(namedDecl(hasName("emplace_back")))))),
hasArgument(0, bindTemporaryExpr(
hasType(recordDecl(hasNonTrivialDestructor())),
has(constructExpr()))),
unless(isInTemplateInstantiation()))
No functional change intended.
llvm-svn: 238602
diff --git a/llvm/lib/TableGen/TGParser.cpp b/llvm/lib/TableGen/TGParser.cpp
index ed01970..66d85556 100644
--- a/llvm/lib/TableGen/TGParser.cpp
+++ b/llvm/lib/TableGen/TGParser.cpp
@@ -1601,7 +1601,7 @@
// DagArg ::= VARNAME
if (Lex.getCode() == tgtok::VarName) {
// A missing value is treated like '?'.
- Result.push_back(std::make_pair(UnsetInit::get(), Lex.getCurStrVal()));
+ Result.emplace_back(UnsetInit::get(), Lex.getCurStrVal());
Lex.Lex();
} else {
// DagArg ::= Value (':' VARNAME)?
@@ -2174,7 +2174,7 @@
if (!Val) return std::vector<LetRecord>();
// Now that we have everything, add the record.
- Result.push_back(LetRecord(Name, Bits, Val, NameLoc));
+ Result.emplace_back(std::move(Name), std::move(Bits), Val, NameLoc);
if (Lex.getCode() != tgtok::comma)
return Result;