Introduce Decl::hasBody() and FunctionDecl::hasBody() and use them instead of getBody() when we are just checking the existence of a body, to avoid de-serialization of the body from PCH.

Makes de-serialization of the function body even more "lazier".

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@107768 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaTemplateInstantiate.cpp b/lib/Sema/SemaTemplateInstantiate.cpp
index 9e454bc..897acf3 100644
--- a/lib/Sema/SemaTemplateInstantiate.cpp
+++ b/lib/Sema/SemaTemplateInstantiate.cpp
@@ -1442,7 +1442,7 @@
             SuppressNew)
           continue;
         
-        if (Function->getBody())
+        if (Function->hasBody())
           continue;
 
         if (TSK == TSK_ExplicitInstantiationDefinition) {
@@ -1452,7 +1452,7 @@
           //   specialization and is only an explicit instantiation definition 
           //   of members whose definition is visible at the point of 
           //   instantiation.
-          if (!Pattern->getBody())
+          if (!Pattern->hasBody())
             continue;
         
           Function->setTemplateSpecializationKind(TSK, PointOfInstantiation);