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| author | Stephen Lin <stephenwlin@gmail.com> | 2013-04-20 05:14:40 +0000 |
|---|---|---|
| committer | Stephen Lin <stephenwlin@gmail.com> | 2013-04-20 05:14:40 +0000 |
| commit | 456ca048af35163b9f52187e92a23ee0a9f059e8 (patch) | |
| tree | f7b4d4711424b927d5b323a9e4ef4d97742beeb4 /lib/IR/Attributes.cpp | |
| parent | 5c34e08b9fff9d4df2421e4f41ff15b85f638dd1 (diff) | |
Add CodeGen support for functions that always return arguments via a new parameter attribute 'returned', which is taken advantage of in target-independent tail call opportunity detection and in ARM call lowering (when placed on an integral first parameter).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179925 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/IR/Attributes.cpp')
| -rw-r--r-- | lib/IR/Attributes.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/IR/Attributes.cpp b/lib/IR/Attributes.cpp index 44fa78e4af..80968dbd1f 100644 --- a/lib/IR/Attributes.cpp +++ b/lib/IR/Attributes.cpp @@ -195,6 +195,8 @@ std::string Attribute::getAsString(bool InAttrGrp) const { return "readnone"; if (hasAttribute(Attribute::ReadOnly)) return "readonly"; + if (hasAttribute(Attribute::Returned)) + return "returned"; if (hasAttribute(Attribute::ReturnsTwice)) return "returns_twice"; if (hasAttribute(Attribute::SExt)) @@ -393,6 +395,7 @@ uint64_t AttributeImpl::getAttrMask(Attribute::AttrKind Val) { case Attribute::SanitizeThread: return 1ULL << 36; case Attribute::SanitizeMemory: return 1ULL << 37; case Attribute::NoBuiltin: return 1ULL << 38; + case Attribute::Returned: return 1ULL << 39; } llvm_unreachable("Unsupported attribute type"); } |