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Remove the isTwoAddress property from the CodeGenInstruction class. It should

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not be used for anything other than backwards compat constraint handling.

Add support for a new DisableEncoding property which contains a list of
registers that should not be encoded by the generated code emitter.  Convert
the codeemitter generator to use this, fixing some PPC JIT regressions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31769 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2006-11-15 23:23:02 +00:00
parent fa326c709f
commit f64f9a4b75
4 changed files with 53 additions and 19 deletions
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utils/TableGen/CodeGenTarget.cpp
+17 -1
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@@ -343,7 +343,7 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
isCall = R->getValueAsBit("isCall");
isLoad = R->getValueAsBit("isLoad");
isStore = R->getValueAsBit("isStore");
isTwoAddress = R->getValueAsBit("isTwoAddress");
bool isTwoAddress = R->getValueAsBit("isTwoAddress");
isPredicated = false; // set below.
isConvertibleToThreeAddress = R->getValueAsBit("isConvertibleToThreeAddress");
isCommutable = R->getValueAsBit("isCommutable");
@@ -413,6 +413,7 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
MIOperandNo += NumOps;
}
// Parse Constraints.
ParseConstraints(R->getValueAsString("Constraints"), this);
// For backward compatibility: isTwoAddress means operand 1 is tied to
@@ -430,6 +431,21 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
for (unsigned j = 0, e = OperandList[op].MINumOperands; j != e; ++j)
if (OperandList[op].Constraints[j].empty())
OperandList[op].Constraints[j] = "0";
// Parse the DisableEncoding field.
std::string DisableEncoding = R->getValueAsString("DisableEncoding");
while (1) {
std::string OpName = getToken(DisableEncoding, " ,\t");
if (OpName.empty()) break;
// Figure out which operand this is.
std::pair<unsigned,unsigned> Op = ParseOperandName(OpName, false);
// Mark the operand as not-to-be encoded.
if (Op.second >= OperandList[Op.first].DoNotEncode.size())
OperandList[Op.first].DoNotEncode.resize(Op.second+1);
OperandList[Op.first].DoNotEncode[Op.second] = true;
}
}