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Disable some compile-time optimizations on PPC

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long double.

llvm-svn: 42958
This commit is contained in:
Dale Johannesen 2007-10-14 01:56:47 +00:00
parent f38341e4a6
commit 4cbce377c6
2 changed files with 15 additions and 0 deletions
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3
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
View File

@ -965,6 +965,9 @@ SDOperand SelectionDAG::FoldSetCC(MVT::ValueType VT, SDOperand N1,
}
if (ConstantFPSDNode *N1C = dyn_cast<ConstantFPSDNode>(N1.Val))
if (ConstantFPSDNode *N2C = dyn_cast<ConstantFPSDNode>(N2.Val)) {
// No compile time operations on this type yet.
if (N1C->getValueType(0) == MVT::ppcf128)
return SDOperand();
APFloat::cmpResult R = N1C->getValueAPF().compare(N2C->getValueAPF());
switch (Cond) {

12
lib/VMCore/ConstantFold.cpp
View File

@ -149,6 +149,9 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, const Constant *V,
return Constant::getNullValue(DestTy);
return UndefValue::get(DestTy);
}
// No compile-time operations on this type yet.
if (V->getType() == Type::PPC_FP128Ty || DestTy == Type::PPC_FP128Ty)
return 0;
// If the cast operand is a constant expression, there's a few things we can
// do to try to simplify it.
@ -808,6 +811,11 @@ static FCmpInst::Predicate evaluateFCmpRelation(const Constant *V1,
const Constant *V2) {
assert(V1->getType() == V2->getType() &&
"Cannot compare values of different types!");
// No compile-time operations on this type yet.
if (V1->getType() == Type::PPC_FP128Ty)
return FCmpInst::BAD_FCMP_PREDICATE;
// Handle degenerate case quickly
if (V1 == V2) return FCmpInst::FCMP_OEQ;
@ -1095,6 +1103,10 @@ Constant *llvm::ConstantFoldCompareInstruction(unsigned short pred,
if (isa<UndefValue>(C1) || isa<UndefValue>(C2))
return UndefValue::get(Type::Int1Ty);
// No compile-time operations on this type yet.
if (C1->getType() == Type::PPC_FP128Ty)
return 0;
// icmp eq/ne(null,GV) -> false/true
if (C1->isNullValue()) {
if (const GlobalValue *GV = dyn_cast<GlobalValue>(C2))