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isel load folding is disabled at -fast. Now hoist the check up to the top level to save some time.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53096 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-07-03 08:39:51 +00:00
parent 10b9de62ff
commit f9d0318950
1 changed files with 27 additions and 8 deletions
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35
utils/TableGen/DAGISelEmitter.cpp
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@ -206,6 +206,28 @@ static bool PatternHasProperty(TreePatternNode *N, SDNP Property,
return false;
}
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.
//
@ -404,6 +426,9 @@ public:
// Record input varargs info.
NumInputRootOps = N->getNumChildren();
if (DisablePatternForFastISel(N, CGP))
emitCheck("!FastISel");
std::string PredicateCheck;
for (unsigned i = 0, e = Predicates->getSize(); i != e; ++i) {
if (DefInit *Pred = dynamic_cast<DefInit*>(Predicates->getElement(i))) {
@ -480,10 +505,8 @@ public:
// / [YY]
// | ^
// [XX]-------|
bool NeedCheck = false;
if (P != Pattern)
NeedCheck = true;
else {
bool NeedCheck = P != Pattern;
if (!NeedCheck) {
const SDNodeInfo &PInfo = CGP.getSDNodeInfo(P->getOperator());
NeedCheck =
P->getOperator() == CGP.get_intrinsic_void_sdnode() ||
@ -1548,10 +1571,6 @@ void DAGISelEmitter::EmitPatterns(std::vector<std::pair<const PatternToMatch*,
OS << std::string(Indent-2, ' ') << "}\n";
}
static std::string getOpcodeName(Record *Op, CodeGenDAGPatterns &CGP) {
return CGP.getSDNodeInfo(Op).getEnumName();
}
static std::string getLegalCName(std::string OpName) {
std::string::size_type pos = OpName.find("::");
if (pos != std::string::npos)