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Fixed a really ugly bug. The TableGen'd isel is not freeing the "inflight set"

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correctly. That is causing non-deterministic behavior (and possibly preventing
some load folding from happening).

llvm-svn: 28458
This commit is contained in:
Evan Cheng 2006-05-25 00:21:44 +00:00
parent bf13bb3b6c
commit 2a4c04d35a
1 changed files with 21 additions and 9 deletions
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30
utils/TableGen/DAGISelEmitter.cpp
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@ -2407,20 +2407,32 @@ public:
std::string Fn = CP->getSelectFunc();
NumRes = CP->getNumOperands();
for (unsigned i = 0; i < NumRes; ++i)
emitDecl("Tmp" + utostr(i+ResNo));
emitDecl("CPTmp" + utostr(i+ResNo));
std::string Code = Fn + "(" + Val;
std::string Code = "bool Match = " + Fn + "(" + Val;
for (unsigned i = 0; i < NumRes; i++)
Code += ", Tmp" + utostr(i + ResNo);
emitCheck(Code + ")");
Code += ", CPTmp" + utostr(i + ResNo);
emitCode(Code + ");");
if (InflightNodes.size()) {
// Remove the in-flight nodes if the ComplexPattern does not match!
emitCode("if (!Match) {");
for (std::vector<std::string>::iterator AI = InflightNodes.begin(),
AE = InflightNodes.end(); AI != AE; ++AI)
emitCode(" InFlightSet.erase(" + *AI + ".Val);");
emitCode("}");
}
emitCheck("Match");
for (unsigned i = 0; i < NumRes; ++i) {
emitCode("InFlightSet.insert(Tmp" + utostr(i+ResNo) + ".Val);");
InflightNodes.push_back("Tmp" + utostr(i+ResNo));
emitCode("InFlightSet.insert(CPTmp" + utostr(i+ResNo) + ".Val);");
InflightNodes.push_back("CPTmp" + utostr(i+ResNo));
}
for (unsigned i = 0; i < NumRes; ++i)
emitCode("Select(Tmp" + utostr(i+ResNo) + ", Tmp" +
for (unsigned i = 0; i < NumRes; ++i) {
emitDecl("Tmp" + utostr(i+ResNo));
emitCode("Select(Tmp" + utostr(i+ResNo) + ", CPTmp" +
utostr(i+ResNo) + ");");
}
TmpNo = ResNo + NumRes;
} else {
@ -2524,7 +2536,6 @@ public:
// Make sure these operands which would be selected won't be folded while
// the isel traverses the DAG upward.
std::vector<std::pair<unsigned, unsigned> > NumTemps(EmitOrder.size());
for (unsigned i = 0, e = EmitOrder.size(); i != e; ++i) {
TreePatternNode *Child = EmitOrder[i].second;
if (!Child->getName().empty()) {
@ -2539,6 +2550,7 @@ public:
}
// Emit all of the operands.
std::vector<std::pair<unsigned, unsigned> > NumTemps(EmitOrder.size());
for (unsigned i = 0, e = EmitOrder.size(); i != e; ++i) {
unsigned OpOrder = EmitOrder[i].first;
TreePatternNode *Child = EmitOrder[i].second;