using namespace llvm;
static void ParseConstraint(const std::string &CStr, CodeGenInstruction *I) {
- // FIXME: Only supports TIED_TO for now.
+ // EARLY_CLOBBER: @early $reg
+ std::string::size_type wpos = CStr.find_first_of(" \t");
+ std::string::size_type start = CStr.find_first_not_of(" \t");
+ std::string Tok = CStr.substr(start, wpos - start);
+ if (Tok == "@earlyclobber") {
+ std::string Name = CStr.substr(wpos+1);
+ wpos = Name.find_first_not_of(" \t");
+ if (wpos == std::string::npos)
+ throw "Illegal format for @earlyclobber constraint: '" + CStr + "'";
+ Name = Name.substr(wpos);
+ std::pair<unsigned,unsigned> Op =
+ I->ParseOperandName(Name, false);
+
+ // Build the string for the operand
+ std::string OpConstraint = "(1 << TOI::EARLY_CLOBBER)";
+ if (!I->OperandList[Op.first].Constraints[Op.second].empty())
+ throw "Operand '" + Name + "' cannot have multiple constraints!";
+ I->OperandList[Op.first].Constraints[Op.second] = OpConstraint;
+ return;
+ }
+
+ // Only other constraint is "TIED_TO" for now.
std::string::size_type pos = CStr.find_first_of('=');
assert(pos != std::string::npos && "Unrecognized constraint");
- std::string::size_type start = CStr.find_first_not_of(" \t");
+ start = CStr.find_first_not_of(" \t");
std::string Name = CStr.substr(start, pos - start);
-
+
// TIED_TO: $src1 = $dst
- std::string::size_type wpos = Name.find_first_of(" \t");
+ wpos = Name.find_first_of(" \t");
if (wpos == std::string::npos)
throw "Illegal format for tied-to constraint: '" + CStr + "'";
std::string DestOpName = Name.substr(0, wpos);
std::pair<unsigned,unsigned> DestOp = I->ParseOperandName(DestOpName, false);
-
+
Name = CStr.substr(pos+1);
wpos = Name.find_first_not_of(" \t");
if (wpos == std::string::npos)
throw "Illegal format for tied-to constraint: '" + CStr + "'";
-
+
std::pair<unsigned,unsigned> SrcOp =
I->ParseOperandName(Name.substr(wpos), false);
if (SrcOp > DestOp)
throw "Illegal tied-to operand constraint '" + CStr + "'";
-
-
+
+
unsigned FlatOpNo = I->getFlattenedOperandNumber(SrcOp);
// Build the string for the operand.
std::string OpConstraint =
"((" + utostr(FlatOpNo) + " << 16) | (1 << TOI::TIED_TO))";
-
-
+
if (!I->OperandList[DestOp.first].Constraints[DestOp.second].empty())
throw "Operand '" + DestOpName + "' cannot have multiple constraints!";
I->OperandList[DestOp.first].Constraints[DestOp.second] = OpConstraint;
static void ParseConstraints(const std::string &CStr, CodeGenInstruction *I) {
// Make sure the constraints list for each operand is large enough to hold
// constraint info, even if none is present.
- for (unsigned i = 0, e = I->OperandList.size(); i != e; ++i)
+ for (unsigned i = 0, e = I->OperandList.size(); i != e; ++i)
I->OperandList[i].Constraints.resize(I->OperandList[i].MINumOperands);
-
+
if (CStr.empty()) return;
-
+
const std::string delims(",");
std::string::size_type bidx, eidx;
-
+
bidx = CStr.find_first_not_of(delims);
while (bidx != std::string::npos) {
eidx = CStr.find_first_of(delims, bidx);
if (eidx == std::string::npos)
eidx = CStr.length();
-
+
ParseConstraint(CStr.substr(bidx, eidx - bidx), I);
bidx = CStr.find_first_not_of(delims, eidx);
}
isTerminator = R->getValueAsBit("isTerminator");
isReMaterializable = R->getValueAsBit("isReMaterializable");
hasDelaySlot = R->getValueAsBit("hasDelaySlot");
- usesCustomDAGSchedInserter = R->getValueAsBit("usesCustomDAGSchedInserter");
+ usesCustomInserter = R->getValueAsBit("usesCustomInserter");
hasCtrlDep = R->getValueAsBit("hasCtrlDep");
isNotDuplicable = R->getValueAsBit("isNotDuplicable");
hasSideEffects = R->getValueAsBit("hasSideEffects");
if (Rec->isSubClassOf("Operand")) {
PrintMethod = Rec->getValueAsString("PrintMethod");
MIOpInfo = Rec->getValueAsDag("MIOperandInfo");
-
+
// Verify that MIOpInfo has an 'ops' root value.
if (!dynamic_cast<DefInit*>(MIOpInfo->getOperator()) ||
dynamic_cast<DefInit*>(MIOpInfo->getOperator())
} else if (Rec->getName() == "variable_ops") {
isVariadic = true;
continue;
- } else if (!Rec->isSubClassOf("RegisterClass") &&
+ } else if (!Rec->isSubClassOf("RegisterClass") &&
Rec->getName() != "ptr_rc" && Rec->getName() != "unknown")
throw "Unknown operand class '" + Rec->getName() +
"' in '" + R->getName() + "' instruction!";
if (!OperandNames.insert(DI->getArgName(i)).second)
throw "In instruction '" + R->getName() + "', operand #" + utostr(i) +
" has the same name as a previous operand!";
-
- OperandList.push_back(OperandInfo(Rec, DI->getArgName(i), PrintMethod,
+
+ OperandList.push_back(OperandInfo(Rec, DI->getArgName(i), PrintMethod,
MIOperandNo, NumOps, MIOpInfo));
MIOperandNo += NumOps;
}
// Parse Constraints.
ParseConstraints(R->getValueAsString("Constraints"), this);
-
+
// For backward compatibility: isTwoAddress means operand 1 is tied to
// operand 0.
if (isTwoAddress) {
"already has constraint set!";
OperandList[1].Constraints[0] = "((0 << 16) | (1 << TOI::TIED_TO))";
}
-
+
// Any operands with unset constraints get 0 as their constraint.
for (unsigned op = 0, e = OperandList.size(); op != e; ++op)
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) {
"' does not have an operand named '$" + Name + "'!";
}
-std::pair<unsigned,unsigned>
+std::pair<unsigned,unsigned>
CodeGenInstruction::ParseOperandName(const std::string &Op,
bool AllowWholeOp) {
if (Op.empty() || Op[0] != '$')
throw TheDef->getName() + ": Illegal operand name: '" + Op + "'";
-
+
std::string OpName = Op.substr(1);
std::string SubOpName;
-
+
// Check to see if this is $foo.bar.
std::string::size_type DotIdx = OpName.find_first_of(".");
if (DotIdx != std::string::npos) {
throw TheDef->getName() + ": illegal empty suboperand name in '" +Op +"'";
OpName = OpName.substr(0, DotIdx);
}
-
+
unsigned OpIdx = getOperandNamed(OpName);
if (SubOpName.empty()) { // If no suboperand name was specified:
SubOpName.empty())
throw TheDef->getName() + ": Illegal to refer to"
" whole operand part of complex operand '" + Op + "'";
-
+
// Otherwise, return the operand.
return std::make_pair(OpIdx, 0U);
}
-
+
// Find the suboperand number involved.
DagInit *MIOpInfo = OperandList[OpIdx].MIOperandInfo;
if (MIOpInfo == 0)
throw TheDef->getName() + ": unknown suboperand name in '" + Op + "'";
-
+
// Find the operand with the right name.
for (unsigned i = 0, e = MIOpInfo->getNumArgs(); i != e; ++i)
if (MIOpInfo->getArgName(i) == SubOpName)
projects / oota-llvm.git / blobdiff