diff options
| author | Douglas Gregor <dgregor@apple.com> | 2010-05-15 06:46:45 +0000 |
|---|---|---|
| committer | Douglas Gregor <dgregor@apple.com> | 2010-05-15 06:46:45 +0000 |
| commit | d86c477fb5d3fc34864afecbbb5443da9355e8fb (patch) | |
| tree | 43c06bb0a10f4cce71fbd57c3b2d8d97e7acae20 /lib/Sema/SemaStmt.cpp | |
| parent | 5077c3876beeaed32280af88244e8050078619a8 (diff) | |
Implement a simple form of the C++ named return value optimization for
return statements. We perform NRVO only when all of the return
statements in the function return the same variable. Fixes some link
failures in Boost.Interprocess (which is relying on NRVO), and
probably improves performance for some C++ applications.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@103867 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Sema/SemaStmt.cpp')
| -rw-r--r-- | lib/Sema/SemaStmt.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Sema/SemaStmt.cpp b/lib/Sema/SemaStmt.cpp index f8fe4fe21c..d904907e97 100644 --- a/lib/Sema/SemaStmt.cpp +++ b/lib/Sema/SemaStmt.cpp @@ -1090,7 +1090,8 @@ static const VarDecl *getNRVOCandidate(ASTContext &Ctx, QualType RetType, return 0; if (VD->getKind() == Decl::Var && VD->hasLocalStorage() && - !VD->getType()->isReferenceType() && !VD->getType().isVolatileQualified()) + !VD->getType()->isReferenceType() && !VD->hasAttr<BlocksAttr>() && + !VD->getType().isVolatileQualified()) return VD; return 0; |