[SelectionDAG] Make SelectCode return void

[svenvh]

Summary

SelectCode has been returning nullptr since 182dac0 ("SDAG: Make
SelectCodeCommon return void", 2016-05-10). Make SelectCode also
return void instead, as all callers have been updated.

[svenvh]

LGTM by Justin Bogner: http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20170227/434384.html

[svenvh]

LGTM by Justin Bogner: http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20170227/434384.html

Committed as r297377.

[svenvh]

Committed as r297377.

utils/TableGen/DAGISelMatcherEmitter.cpp

 
 
 void llvm::EmitMatcherTable(const Matcher *TheMatcher,
                             const CodeGenDAGPatterns &CGP,
                             raw_ostream &O) {
   formatted_raw_ostream OS(O);
 
   OS << "// The main instruction selector code.\n";
-  OS << "SDNode *SelectCode(SDNode *N) {\n";
+  OS << "void SelectCode(SDNode *N) {\n";
 
   MatcherTableEmitter MatcherEmitter(CGP);
 
   OS << "  // Some target values are emitted as 2 bytes, TARGET_VAL handles\n";
   OS << "  // this.\n";
   OS << "  #define TARGET_VAL(X) X & 255, unsigned(X) >> 8\n";
   OS << "  static const unsigned char MatcherTable[] = {\n";
   unsigned TotalSize = MatcherEmitter.EmitMatcherList(TheMatcher, 6, 0, OS);
   OS << "    0\n  }; // Total Array size is " << (TotalSize+1) << " bytes\n\n";
 
   MatcherEmitter.EmitHistogram(TheMatcher, OS);
 
   OS << "  #undef TARGET_VAL\n";
   OS << "  SelectCodeCommon(N, MatcherTable,sizeof(MatcherTable));\n";
-  OS << "  return nullptr;\n";
   OS << "}\n";
 
   // Next up, emit the function for node and pattern predicates:
   MatcherEmitter.EmitPredicateFunctions(OS);
 
   if (InstrumentCoverage)
     MatcherEmitter.EmitPatternMatchTable(OS);
 }