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| author | Reid Kleckner <reid@kleckner.net> | 2013-12-19 02:14:12 +0000 |
|---|---|---|
| committer | Reid Kleckner <reid@kleckner.net> | 2013-12-19 02:14:12 +0000 |
| commit | 4b70bfc905f3ac68a8429f9fe0016e30433b3b0c (patch) | |
| tree | a00d968a7acb98e5d24df90bbb9d1ba61befb0c9 /lib/AsmParser | |
| parent | 1d4866ccbfa64517e5755ddb06f92b4b6aafda0f (diff) | |
| download | llvm-4b70bfc905f3ac68a8429f9fe0016e30433b3b0c.tar.gz llvm-4b70bfc905f3ac68a8429f9fe0016e30433b3b0c.tar.bz2 llvm-4b70bfc905f3ac68a8429f9fe0016e30433b3b0c.tar.xz | |
Begin adding docs and IR-level support for the inalloca attribute
The inalloca attribute is designed to support passing C++ objects by
value in the Microsoft C++ ABI. It behaves the same as byval, except
that it always implies that the argument is in memory and that the bytes
are never copied. This attribute allows the caller to take the address
of an outgoing argument's memory and execute arbitrary code to store
into it.
This patch adds basic IR support, docs, and verification. It does not
attempt to implement any lowering or fix any possibly broken transforms.
When this patch lands, a complete description of this feature should
appear at http://llvm.org/docs/InAlloca.html .
Differential Revision: http://llvm-reviews.chandlerc.com/D2173
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197645 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/AsmParser')
| -rw-r--r-- | lib/AsmParser/LLLexer.cpp | 1 | ||||
| -rw-r--r-- | lib/AsmParser/LLParser.cpp | 3 | ||||
| -rw-r--r-- | lib/AsmParser/LLToken.h | 1 |
3 files changed, 5 insertions, 0 deletions
diff --git a/lib/AsmParser/LLLexer.cpp b/lib/AsmParser/LLLexer.cpp index 3c384f5fcc..1b32047e4b 100644 --- a/lib/AsmParser/LLLexer.cpp +++ b/lib/AsmParser/LLLexer.cpp @@ -572,6 +572,7 @@ lltok::Kind LLLexer::LexIdentifier() { KEYWORD(alwaysinline); KEYWORD(builtin); KEYWORD(byval); + KEYWORD(inalloca); KEYWORD(cold); KEYWORD(inlinehint); KEYWORD(inreg); diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp index 3b903cdb09..a5b2aa586e 100644 --- a/lib/AsmParser/LLParser.cpp +++ b/lib/AsmParser/LLParser.cpp @@ -944,6 +944,7 @@ bool LLParser::ParseFnAttributeValuePairs(AttrBuilder &B, "invalid use of attribute on a function"); break; case lltok::kw_byval: + case lltok::kw_inalloca: case lltok::kw_nest: case lltok::kw_noalias: case lltok::kw_nocapture: @@ -1156,6 +1157,7 @@ bool LLParser::ParseOptionalParamAttrs(AttrBuilder &B) { continue; } case lltok::kw_byval: B.addAttribute(Attribute::ByVal); break; + case lltok::kw_inalloca: B.addAttribute(Attribute::InAlloca); break; case lltok::kw_inreg: B.addAttribute(Attribute::InReg); break; case lltok::kw_nest: B.addAttribute(Attribute::Nest); break; case lltok::kw_noalias: B.addAttribute(Attribute::NoAlias); break; @@ -1218,6 +1220,7 @@ bool LLParser::ParseOptionalReturnAttrs(AttrBuilder &B) { // Error handling. case lltok::kw_align: case lltok::kw_byval: + case lltok::kw_inalloca: case lltok::kw_nest: case lltok::kw_nocapture: case lltok::kw_returned: diff --git a/lib/AsmParser/LLToken.h b/lib/AsmParser/LLToken.h index 786d84d766..5a6866dd14 100644 --- a/lib/AsmParser/LLToken.h +++ b/lib/AsmParser/LLToken.h @@ -99,6 +99,7 @@ namespace lltok { kw_sanitize_address, kw_builtin, kw_byval, + kw_inalloca, kw_cold, kw_inlinehint, kw_inreg, |