SDAG: Remove OPC_MarkGlueResults and associated logic. NFC

This opcode never happens in practice, and yet the logic we have in
place to handle it would be undefined behaviour if we ever executed
it. Remove it rather than trying to refactor code that's never
reached.

llvm-svn: 268692

1 files changed, 0 insertions, 11 deletions

diff --git a/llvm/utils/TableGen/DAGISelMatcherGen.cpp b/llvm/utils/TableGen/DAGISelMatcherGen.cpp
index cac11016514..04d8ff0b8e6 100644
--- a/llvm/utils/TableGen/DAGISelMatcherGen.cpp
+++ b/llvm/utils/TableGen/DAGISelMatcherGen.cpp
@@ -75,10 +75,6 @@ namespace {
     /// array of all of the recorded input nodes that have chains.
     SmallVector<unsigned, 2> MatchedChainNodes;
 
-    /// MatchedGlueResultNodes - This maintains the position in the recorded
-    /// nodes array of all of the recorded input nodes that have glue results.
-    SmallVector<unsigned, 2> MatchedGlueResultNodes;
-
     /// MatchedComplexPatterns - This maintains a list of all of the
     /// ComplexPatterns that we need to check. The second element of each pair
     /// is the recorded operand number of the input node.
@@ -425,8 +421,6 @@ void MatcherGen::EmitOperatorMatchCode(const TreePatternNode *N,
     AddMatcher(new RecordMatcher("'" + N->getOperator()->getName() +
                                          "' glue output node",
                                  NextRecordedOperandNo));
-    // Remember all of the nodes with output glue our pattern will match.
-    MatchedGlueResultNodes.push_back(NextRecordedOperandNo++);
   }
 
   // If this node is known to have an input glue or if it *might* have an input
@@ -988,11 +982,6 @@ void MatcherGen::EmitResultCode() {
   assert(Ops.size() >= NumSrcResults && "Didn't provide enough results");
   Ops.resize(NumSrcResults);
 
-  // If the matched pattern covers nodes which define a glue result, emit a node
-  // that tells the matcher about them so that it can update their results.
-  if (!MatchedGlueResultNodes.empty())
-    AddMatcher(new MarkGlueResultsMatcher(MatchedGlueResultNodes));
-
   AddMatcher(new CompleteMatchMatcher(Ops, Pattern));
 }