Disable some compile-time optimizations on PPC

long double.

llvm-svn: 42958

2 files changed, 15 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 3e798bc8ce7..eb6e60302d9 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -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) {
diff --git a/llvm/lib/VMCore/ConstantFold.cpp b/llvm/lib/VMCore/ConstantFold.cpp
index 8234900032c..485b42863b2 100644
--- a/llvm/lib/VMCore/ConstantFold.cpp
+++ b/llvm/lib/VMCore/ConstantFold.cpp
@@ -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))