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