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Add support for extractvalue and insertvalue instructions in GVN.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52472 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2008-06-18 21:59:00 +00:00
parent b230372437
commit d34ac6e782
1 changed files with 63 additions and 1 deletions
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64
lib/Transforms/Scalar/GVN.cpp
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@ -59,7 +59,7 @@ namespace {
SHUFFLE, SELECT, TRUNC, ZEXT, SEXT, FPTOUI,
FPTOSI, UITOFP, SITOFP, FPTRUNC, FPEXT,
PTRTOINT, INTTOPTR, BITCAST, GEP, CALL, CONSTANT,
EMPTY, TOMBSTONE };
EXTRACTVALUE, INSERTVALUE, EMPTY, TOMBSTONE };
ExpressionOpcode opcode;
const Type* type;
@ -150,6 +150,8 @@ namespace {
Expression create_expression(GetElementPtrInst* G);
Expression create_expression(CallInst* C);
Expression create_expression(Constant* C);
Expression create_expression(InsertValueInst* I);
Expression create_expression(ExtractValueInst* I);
public:
ValueTable() : nextValueNumber(1) { }
uint32_t lookup_or_add(Value* V);
@ -284,6 +286,40 @@ Expression::ExpressionOpcode ValueTable::getOpcode(CastInst* C) {
}
}
Expression ValueTable::create_expression(InsertValueInst* I) {
Expression e;
e.type = I->getType();
e.firstVN = lookup_or_add(I->getOperand(0));
e.secondVN = lookup_or_add(I->getOperand(1));
e.thirdVN = 0;
e.function = 0;
e.opcode = Expression::INSERTVALUE;
for (InsertValueInst::op_iterator OI = I->op_begin()+2,
OE = I->op_end(); OI != OE; ++OI)
e.varargs.push_back(lookup_or_add(I));
return e;
}
Expression ValueTable::create_expression(ExtractValueInst* I) {
Expression e;
e.type = I->getType();
e.firstVN = lookup_or_add(I->getOperand(0));
e.secondVN = lookup_or_add(I->getOperand(1));
e.thirdVN = 0;
e.function = 0;
e.opcode = Expression::EXTRACTVALUE;
for (InsertValueInst::op_iterator OI = I->op_begin()+2,
OE = I->op_end(); OI != OE; ++OI)
e.varargs.push_back(lookup_or_add(I));
return e;
}
Expression ValueTable::create_expression(CallInst* C) {
Expression e;
@ -539,6 +575,32 @@ uint32_t ValueTable::lookup_or_add(Value* V) {
} else {
valueNumbering.insert(std::make_pair(V, nextValueNumber));
return nextValueNumber++;
}
} else if (InsertValueInst* II = dyn_cast<InsertValueInst>(V)) {
Expression e = create_expression(II);
DenseMap<Expression, uint32_t>::iterator EI = expressionNumbering.find(e);
if (EI != expressionNumbering.end()) {
valueNumbering.insert(std::make_pair(V, EI->second));
return EI->second;
} else {
expressionNumbering.insert(std::make_pair(e, nextValueNumber));
valueNumbering.insert(std::make_pair(V, nextValueNumber));
return nextValueNumber++;
}
} else if (ExtractValueInst* E = dyn_cast<ExtractValueInst>(V)) {
Expression e = create_expression(E);
DenseMap<Expression, uint32_t>::iterator EI = expressionNumbering.find(e);
if (EI != expressionNumbering.end()) {
valueNumbering.insert(std::make_pair(V, EI->second));
return EI->second;
} else {
expressionNumbering.insert(std::make_pair(e, nextValueNumber));
valueNumbering.insert(std::make_pair(V, nextValueNumber));
return nextValueNumber++;
}
} else if (BinaryOperator* BO = dyn_cast<BinaryOperator>(V)) {