diff options
| 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/AsmParser/LLParser.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/AsmParser/LLParser.cpp')
| -rw-r--r-- | lib/AsmParser/LLParser.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp index 8fa626dcc9..92756bad82 100644 --- a/lib/AsmParser/LLParser.cpp +++ b/lib/AsmParser/LLParser.cpp @@ -944,6 +944,7 @@ bool LLParser::ParseFnAttributeValuePairs(AttrBuilder &B, case lltok::kw_nest: case lltok::kw_noalias: case lltok::kw_nocapture: + case lltok::kw_returned: case lltok::kw_sret: HaveError |= Error(Lex.getLoc(), @@ -1156,6 +1157,7 @@ bool LLParser::ParseOptionalParamAttrs(AttrBuilder &B) { case lltok::kw_nest: B.addAttribute(Attribute::Nest); break; case lltok::kw_noalias: B.addAttribute(Attribute::NoAlias); break; case lltok::kw_nocapture: B.addAttribute(Attribute::NoCapture); break; + case lltok::kw_returned: B.addAttribute(Attribute::Returned); break; case lltok::kw_signext: B.addAttribute(Attribute::SExt); break; case lltok::kw_sret: B.addAttribute(Attribute::StructRet); break; case lltok::kw_zeroext: B.addAttribute(Attribute::ZExt); break; @@ -1199,6 +1201,7 @@ bool LLParser::ParseOptionalReturnAttrs(AttrBuilder &B) { case lltok::kw_byval: case lltok::kw_nest: case lltok::kw_nocapture: + case lltok::kw_returned: case lltok::kw_sret: HaveError |= Error(Lex.getLoc(), "invalid use of parameter-only attribute"); break; |