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enhance tblgen to support anonymous defm's, use this to

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simplify the X86 CMOVmr's.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115702 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-10-05 22:51:56 +00:00
parent 286997c745
commit df72eaef3d
3 changed files with 59 additions and 34 deletions
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49
utils/TableGen/TGParser.cpp
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@@ -294,20 +294,23 @@ static bool isObjectStart(tgtok::TokKind K) {
K == tgtok::Defm || K == tgtok::Let || K == tgtok::MultiClass;
}
static std::string GetNewAnonymousName() {
static unsigned AnonCounter = 0;
return "anonymous."+utostr(AnonCounter++);
}
/// ParseObjectName - If an object name is specified, return it. Otherwise,
/// return an anonymous name.
/// ObjectName ::= ID
/// ObjectName ::= /*empty*/
///
std::string TGParser::ParseObjectName() {
if (Lex.getCode() == tgtok::Id) {
std::string Ret = Lex.getCurStrVal();
Lex.Lex();
return Ret;
}
static unsigned AnonCounter = 0;
return "anonymous."+utostr(AnonCounter++);
if (Lex.getCode() != tgtok::Id)
return GetNewAnonymousName();
std::string Ret = Lex.getCurStrVal();
Lex.Lex();
return Ret;
}
@@ -1899,12 +1902,15 @@ bool TGParser::ParseMultiClass() {
///
bool TGParser::ParseDefm(MultiClass *CurMultiClass) {
assert(Lex.getCode() == tgtok::Defm && "Unexpected token!");
if (Lex.Lex() != tgtok::Id) // eat the defm.
return TokError("expected identifier after defm");
std::string DefmPrefix;
if (Lex.Lex() == tgtok::Id) { // eat the defm.
DefmPrefix = Lex.getCurStrVal();
Lex.Lex(); // Eat the defm prefix.
}
SMLoc DefmPrefixLoc = Lex.getLoc();
std::string DefmPrefix = Lex.getCurStrVal();
if (Lex.Lex() != tgtok::colon)
if (Lex.getCode() != tgtok::colon)
return TokError("expected ':' after defm identifier");
// Keep track of the new generated record definitions.
@@ -1939,14 +1945,21 @@ bool TGParser::ParseDefm(MultiClass *CurMultiClass) {
for (unsigned i = 0, e = MC->DefPrototypes.size(); i != e; ++i) {
Record *DefProto = MC->DefPrototypes[i];
// Add in the defm name
// Add in the defm name. If the defm prefix is empty, give each
// instantiated def a unique name. Otherwise, if "#NAME#" exists in the
// name, substitute the prefix for #NAME#. Otherwise, use the defm name
// as a prefix.
std::string DefName = DefProto->getName();
std::string::size_type idx = DefName.find("#NAME#");
if (idx != std::string::npos) {
DefName.replace(idx, 6, DefmPrefix);
if (DefmPrefix.empty()) {
DefName = GetNewAnonymousName();
} else {
// Add the suffix to the defm name to get the new name.
DefName = DefmPrefix + DefName;
std::string::size_type idx = DefName.find("#NAME#");
if (idx != std::string::npos) {
DefName.replace(idx, 6, DefmPrefix);
} else {
// Add the suffix to the defm name to get the new name.
DefName = DefmPrefix + DefName;
}
}
Record *CurRec = new Record(DefName, DefmPrefixLoc);