Debug Info: clean up usage of Verify.

No functionality change. It should suffice to check the type of a debug info
metadata, instead of calling Verify.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185383 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Instrumentation/DebugIR.cpp

@@ -219,7 +219,7 @@ public:
     MDNode *Sub = Builder.createFunction(
         DICompileUnit(CUNode), F.getName(), MangledName, DIFile(FileNode), Line,
         Sig, Local, IsDefinition, ScopeLine, FuncFlags, IsOptimized, &F);
-    assert(DISubprogram(Sub).Verify());
+    assert(DISubprogram(Sub).isSubprogram());
     DEBUG(dbgs() << "create subprogram mdnode " << Sub << ": "
                  << "\n");