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implement a fixme: only select values once, even if used multiple times.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23454 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-09-26 21:53:26 +00:00
parent ff0c1ef9eb
commit 6bc7e513d5
1 changed files with 8 additions and 5 deletions
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13
utils/TableGen/DAGISelEmitter.cpp
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@ -1074,23 +1074,26 @@ void DAGISelEmitter::EmitMatchForPattern(TreePatternNode *N,
<< ".Val)) goto P" << PatternNo << "Fail;\n"; << ".Val)) goto P" << PatternNo << "Fail;\n";
} }
/// CodeGenPatternResult - Emit the action for a pattern. Now that it has
/// matched, we actually have to build a DAG!
unsigned DAGISelEmitter:: unsigned DAGISelEmitter::
CodeGenPatternResult(TreePatternNode *N, unsigned &Ctr, CodeGenPatternResult(TreePatternNode *N, unsigned &Ctr,
std::map<std::string,std::string> &VariableMap, std::map<std::string,std::string> &VariableMap,
std::ostream &OS){ std::ostream &OS) {
// This is something selected from the pattern we matched. // This is something selected from the pattern we matched.
if (!N->getName().empty()) { if (!N->getName().empty()) {
const std::string &Val = VariableMap[N->getName()]; std::string &Val = VariableMap[N->getName()];
assert(!Val.empty() && assert(!Val.empty() &&
"Variable referenced but not defined and not caught earlier!"); "Variable referenced but not defined and not caught earlier!");
if (Val[0] == 'T' && Val[1] == 'm' && Val[2] == 'p') { if (Val[0] == 'T' && Val[1] == 'm' && Val[2] == 'p') {
// Already selected this operand, just return the tmpval. // Already selected this operand, just return the tmpval.
// FIXME: DO THIS. return atoi(Val.c_str()+3);
} else { } else {
unsigned ResNo = Ctr++; unsigned ResNo = Ctr++;
OS << " SDOperand Tmp" << ResNo << " = Select(" << Val << ");\n"; OS << " SDOperand Tmp" << ResNo << " = Select(" << Val << ");\n";
// FIXME: Add Tmp<ResNo> to VariableMap. // Add Tmp<ResNo> to VariableMap, so that we don't multiply select this
// value if used multiple times by this pattern result.
Val = "Tmp"+utostr(ResNo);
return ResNo; return ResNo;
} }
} }