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[ms-inline asm] Emit the (new) inline asm Non-Standard Dialect attribute.

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llvm-svn: 163181
This commit is contained in:
Chad Rosier 2012-09-05 00:08:17 +00:00
parent e90f78d5cd
commit aaee8ac173
4 changed files with 22 additions and 5 deletions
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15
docs/LangRef.html
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@ -2894,8 +2894,19 @@ call void asm sideeffect "eieio", ""()
call void asm alignstack "eieio", ""()
</pre>
<p>If both keywords appear the '<tt>sideeffect</tt>' keyword must come
first.</p>
<p>Inline asms also support using non-standard assembly dialects. The standard
dialect is ATT, which is assumed when the '<tt>nsdialect</tt>' keyword is not
present. When the '<tt>nsdialect</tt>' keyword is present, the dialect is
assumed to be Intel. Currently, ATT and Intel are the only supported
dialects. An example is:</p>
<pre class="doc_code">
call void asm nsdialect "eieio", ""()
</pre>
<p>If multiple keywords appear the '<tt>sideeffect</tt>' keyword must come
first, the '<tt>alignstack</tt>' keyword second and the
'<tt>nsdialect</tt>' keyword last.</p>
<!--
<p>TODO: The format of the asm and constraints string still need to be

9
lib/AsmParser/LLParser.cpp
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@ -2069,16 +2069,18 @@ bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) {
case lltok::kw_asm: {
// ValID ::= 'asm' SideEffect? AlignStack? STRINGCONSTANT ',' STRINGCONSTANT
bool HasSideEffect, AlignStack;
bool HasSideEffect, AlignStack, NSDialect;
Lex.Lex();
if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) ||
ParseOptionalToken(lltok::kw_alignstack, AlignStack) ||
ParseOptionalToken(lltok::kw_nsdialect, NSDialect) ||
ParseStringConstant(ID.StrVal) ||
ParseToken(lltok::comma, "expected comma in inline asm expression") ||
ParseToken(lltok::StringConstant, "expected constraint string"))
return true;
ID.StrVal2 = Lex.getStrVal();
ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1);
ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1) |
(unsigned(NSDialect)<<2);
ID.Kind = ValID::t_InlineAsm;
return false;
}
@ -2495,7 +2497,8 @@ bool LLParser::ConvertValIDToValue(Type *Ty, ValID &ID, Value *&V,
PTy ? dyn_cast<FunctionType>(PTy->getElementType()) : 0;
if (!FTy || !InlineAsm::Verify(FTy, ID.StrVal2))
return Error(ID.Loc, "invalid type for inline asm constraint string");
V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1, ID.UIntVal>>1);
V = InlineAsm::get(FTy, ID.StrVal, ID.StrVal2, ID.UIntVal&1,
(ID.UIntVal>>1)&1, (ID.UIntVal>>2)&1);
return false;
}
case ValID::t_MDNode:

1
lib/AsmParser/LLToken.h
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@ -72,6 +72,7 @@ namespace lltok {
kw_asm,
kw_sideeffect,
kw_alignstack,
kw_nsdialect,
kw_gc,
kw_c,

2
lib/VMCore/AsmWriter.cpp
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@ -1029,6 +1029,8 @@ static void WriteAsOperandInternal(raw_ostream &Out, const Value *V,
Out << "sideeffect ";
if (IA->isAlignStack())
Out << "alignstack ";
if (IA->getDialect() != 0)
Out << "nsdialect ";
Out << '"';
PrintEscapedString(IA->getAsmString(), Out);
Out << "\", \"";