Fix a ppc long double regression I introduced yesterday due to a

simplification.  This fixes automotive-basicmath on PPC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46072 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 67da854aa4f26bc284293df2852388400c1a3e28..34825beffabd0acb0ec982bb248f98b2c28e7df4 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -1753,6 +1753,7 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
   case ISD::FP_EXTEND:
     assert(MVT::isFloatingPoint(VT) &&
            MVT::isFloatingPoint(Operand.getValueType()) && "Invalid FP cast!");
+    if (Operand.getValueType() == VT) return Operand;  // noop conversion.
     break;
   case ISD::SIGN_EXTEND:
     assert(MVT::isInteger(VT) && MVT::isInteger(Operand.getValueType()) &&