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[CodeGen] Add space-optimized EmitMergeInputChains1_2 to the DAG isel matching tables. Shaves about 5100 bytes from the X86 matcher table. NFC 

llvm-svn: 262815
This commit is contained in:
Craig Topper 2016-03-07 07:29:12 +00:00
parent 67a1830c6a
commit 267bdb2094
3 changed files with 6 additions and 4 deletions
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1
llvm/include/llvm/CodeGen/SelectionDAGISel.h
View File

@ -140,6 +140,7 @@ public:
OPC_EmitMergeInputChains,
OPC_EmitMergeInputChains1_0,
OPC_EmitMergeInputChains1_1,
OPC_EmitMergeInputChains1_2,
OPC_EmitCopyToReg,
OPC_EmitNodeXForm,
OPC_EmitNode,

5
llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -3051,7 +3051,8 @@ SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
}
case OPC_EmitMergeInputChains1_0: // OPC_EmitMergeInputChains, 1, 0
case OPC_EmitMergeInputChains1_1: { // OPC_EmitMergeInputChains, 1, 1
case OPC_EmitMergeInputChains1_1: // OPC_EmitMergeInputChains, 1, 1
case OPC_EmitMergeInputChains1_2: { // OPC_EmitMergeInputChains, 1, 2
// These are space-optimized forms of OPC_EmitMergeInputChains.
assert(!InputChain.getNode() &&
"EmitMergeInputChains should be the first chain producing node");
@ -3059,7 +3060,7 @@ SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
"Should only have one EmitMergeInputChains per match");
// Read all of the chained nodes.
unsigned RecNo = Opcode == OPC_EmitMergeInputChains1_1;
unsigned RecNo = Opcode - OPC_EmitMergeInputChains1_0;
assert(RecNo < RecordedNodes.size() && "Invalid EmitMergeInputChains");
ChainNodesMatched.push_back(RecordedNodes[RecNo].first.getNode());

4
llvm/utils/TableGen/DAGISelMatcherEmitter.cpp
View File

@ -500,8 +500,8 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
const EmitMergeInputChainsMatcher *MN =
cast<EmitMergeInputChainsMatcher>(N);
// Handle the specialized forms OPC_EmitMergeInputChains1_0 and 1_1.
if (MN->getNumNodes() == 1 && MN->getNode(0) < 2) {
// Handle the specialized forms OPC_EmitMergeInputChains1_0, 1_1, and 1_2.
if (MN->getNumNodes() == 1 && MN->getNode(0) < 3) {
OS << "OPC_EmitMergeInputChains1_" << MN->getNode(0) << ",\n";
return 1;
}