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add a new Push2 opcode for targets (like cellspu) which have

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ridiculously ginormous patterns and need more than one byte
of displacement for encodings.  This fixes CellSPU/fdiv.ll.
SPU is still doing something else ridiculous though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96833 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-02-22 23:55:39 +00:00
parent c6feeb7fa9
commit 3e22f2d489
2 changed files with 32 additions and 6 deletions
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15
include/llvm/CodeGen/DAGISelHeader.h
View File

@ -201,7 +201,7 @@ GetInt8(const unsigned char *MatcherTable, unsigned &Idx) {
}
enum BuiltinOpcodes {
OPC_Push,
OPC_Push, OPC_Push2,
OPC_RecordNode,
OPC_RecordMemRef,
OPC_CaptureFlagInput,
@ -359,6 +359,19 @@ SDNode *SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
MatchScopes.push_back(NewEntry);
continue;
}
case OPC_Push2: {
unsigned NumToSkip = GetInt2(MatcherTable, MatcherIndex);
MatchScope NewEntry;
NewEntry.FailIndex = MatcherIndex+NumToSkip;
NewEntry.NodeStackSize = NodeStack.size();
NewEntry.NumRecordedNodes = RecordedNodes.size();
NewEntry.NumMatchedMemRefs = MatchedMemRefs.size();
NewEntry.InputChain = InputChain;
NewEntry.InputFlag = InputFlag;
NewEntry.HasChainNodesMatched = !ChainNodesMatched.empty();
MatchScopes.push_back(NewEntry);
continue;
}
case OPC_RecordNode:
// Remember this node, it may end up being an operand in the pattern.
RecordedNodes.push_back(N);

23
utils/TableGen/DAGISelMatcherEmitter.cpp
View File

@ -350,16 +350,29 @@ EmitMatcherList(const MatcherNode *N, unsigned Indent, unsigned CurrentIdx,
NextSize = EmitMatcherList(cast<PushMatcherNode>(N)->getNext(),
Indent+1, CurrentIdx+2, FOS);
}
// In the unlikely event that we have something too big to emit with a
// one byte offset, regenerate it with a two-byte one.
if (NextSize > 255) {
errs() <<
"Tblgen internal error: can't handle predicate this complex yet\n";
// FIXME: exit(1);
TmpBuf.clear();
raw_svector_ostream OS(TmpBuf);
formatted_raw_ostream FOS(OS);
NextSize = EmitMatcherList(cast<PushMatcherNode>(N)->getNext(),
Indent+1, CurrentIdx+3, FOS);
if (NextSize > 65535) {
errs() <<
"Tblgen internal error: can't handle pattern this complex yet\n";
exit(1);
}
}
OS << "/*" << CurrentIdx << "*/";
OS.PadToColumn(Indent*2);
OS << "OPC_Push, " << NextSize << ",\n";
if (NextSize < 256)
OS << "OPC_Push, " << NextSize << ",\n";
else
OS << "OPC_Push2, " << (NextSize&255) << ", " << (NextSize>>8) << ",\n";
OS << TmpBuf.str();
Size += 2+NextSize;