Don't recompute something that we already have in a local variable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127764 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index c6b1a2d..aa7009a 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -1151,9 +1151,9 @@
           Flags.setInReg();
 
         // Propagate extension type if any
-        if (F->paramHasAttr(0, Attribute::SExt))
+        if (ExtendKind == ISD::SIGN_EXTEND)
           Flags.setSExt();
-        else if (F->paramHasAttr(0, Attribute::ZExt))
+        else if (ExtendKind == ISD::ZERO_EXTEND)
           Flags.setZExt();
 
         for (unsigned i = 0; i < NumParts; ++i) {