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remove the DisablePatternForFastISel predicate, which is a check

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that predated -fast-isel which attempted to speed up the dag pattern
matchers at -O0.  Since fast-isel is around, this is basically 
obsolete and removing it shrinks the generated dag isels.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96188 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-02-14 21:11:53 +00:00
parent 383fed9c7a
commit c87bf389dc
1 changed files with 3 additions and 24 deletions
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27
utils/TableGen/DAGISelEmitter.cpp
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@ -261,24 +261,6 @@ static std::string getOpcodeName(Record *Op, CodeGenDAGPatterns &CGP) {
return CGP.getSDNodeInfo(Op).getEnumName();
}
static
bool DisablePatternForFastISel(TreePatternNode *N, CodeGenDAGPatterns &CGP) {
bool isStore = !N->isLeaf() &&
getOpcodeName(N->getOperator(), CGP) == "ISD::STORE";
if (!isStore && NodeHasProperty(N, SDNPHasChain, CGP))
return false;
bool HasChain = false;
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i) {
TreePatternNode *Child = N->getChild(i);
if (PatternHasProperty(Child, SDNPHasChain, CGP)) {
HasChain = true;
break;
}
}
return HasChain;
}
//===----------------------------------------------------------------------===//
// Node Transformation emitter implementation.
//
@ -594,10 +576,6 @@ void PatternCodeEmitter::EmitMatchCode(TreePatternNode *N, TreePatternNode *P,
if (isRoot) {
// Record input varargs info.
NumInputRootOps = N->getNumChildren();
if (DisablePatternForFastISel(N, CGP))
emitCheck("OptLevel != CodeGenOpt::None");
emitCheck(PredicateCheck);
}
@ -1506,7 +1484,8 @@ void DAGISelEmitter::GenerateCodeForPattern(const PatternToMatch &Pattern,
bool FoundChain = false;
Emitter.EmitMatchCode(Pattern.getSrcPattern(), NULL, "N", "", FoundChain);
// TP - Get *SOME* tree pattern, we don't care which.
// TP - Get *SOME* tree pattern, we don't care which. It is only used for
// diagnostics, which we know are impossible at this point.
TreePattern &TP = *CGP.pf_begin()->second;
// At this point, we know that we structurally match the pattern, but the
@ -1699,7 +1678,7 @@ void DAGISelEmitter::EmitInstructionSelector(raw_ostream &OS) {
for (CodeGenDAGPatterns::ptm_iterator I = CGP.ptm_begin(),
E = CGP.ptm_end(); I != E; ++I) {
const PatternToMatch &Pattern = *I;
TreePatternNode *Node = Pattern.getSrcPattern();
if (!Node->isLeaf()) {
PatternsByOpcode[getOpcodeName(Node->getOperator(), CGP)].