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In Twine::str(), if the Twine stores only a std::string, just return a direct copy of that instead of first copying to a SmallString and converting that to a std::string. Also fix some indentation.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135267 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Frits van Bommel
2011-07-15 11:05:37 +00:00
parent 0bd9d3af54
commit 331dbca73d
1 changed files with 8 additions and 3 deletions
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11
lib/Support/Twine.cpp
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@@ -14,6 +14,11 @@
using namespace llvm; using namespace llvm;
std::string Twine::str() const { std::string Twine::str() const {
// If we're storing only a std::string, just return it.
if (LHSKind == StdStringKind && RHSKind == EmptyKind)
return *static_cast<const std::string*>(LHS);
// Otherwise, flatten and copy the contents first.
SmallString<256> Vec; SmallString<256> Vec;
return toStringRef(Vec).str(); return toStringRef(Vec).str();
} }
@@ -37,9 +42,9 @@ StringRef Twine::toNullTerminatedStringRef(SmallVectorImpl<char> &Out) const {
// Already null terminated, yay! // Already null terminated, yay!
return StringRef(static_cast<const char*>(LHS)); return StringRef(static_cast<const char*>(LHS));
case StdStringKind: { case StdStringKind: {
const std::string *str = static_cast<const std::string*>(LHS); const std::string *str = static_cast<const std::string*>(LHS);
return StringRef(str->c_str(), str->size()); return StringRef(str->c_str(), str->size());
} }
default: default:
break; break;
} }