Revert "Verifier: Disallow uses of intrinsic global variables"

This reverts commit b67c16f.

Author: tstellar

llvm/lib/IR/Verifier.cpp

@@ -730,9 +730,6 @@ void Verifier::visitGlobalVariable(const GlobalVariable &GV) {
                        GV.getName() == "llvm.global_dtors")) {
     Check(!GV.hasInitializer() || GV.hasAppendingLinkage(),
           "invalid linkage for intrinsic global variable", &GV);
-    Check(GV.materialized_use_empty(),
-          "invalid uses of intrinsic global variable", &GV);
-
     // Don't worry about emitting an error for it not being an array,
     // visitGlobalValue will complain on appending non-array.
     if (ArrayType *ATy = dyn_cast<ArrayType>(GV.getValueType())) {
@@ -759,9 +756,6 @@ void Verifier::visitGlobalVariable(const GlobalVariable &GV) {
                        GV.getName() == "llvm.compiler.used")) {
     Check(!GV.hasInitializer() || GV.hasAppendingLinkage(),
           "invalid linkage for intrinsic global variable", &GV);
-    Check(GV.materialized_use_empty(),
-          "invalid uses of intrinsic global variable", &GV);
-
     Type *GVType = GV.getValueType();
     if (ArrayType *ATy = dyn_cast<ArrayType>(GVType)) {
       PointerType *PTy = dyn_cast<PointerType>(ATy->getElementType());