[Autobackout][FunctionalRegression]Revert of change: c3e6c9d: Don't cache volatile load store instructions

On platforms with default cache policy set to L1 and L3 cached
    such as DG2 or BMG volatile instructions are also cached. Since
    CUDA doesn't cache volatile pointers, there is a code that is
    not supported by Intel GPU, as caching volatile can lead to hangs.

Author: sys-igc

IGC/Compiler/CISACodeGen/EmitVISAPass.cpp

@@ -23173,33 +23173,6 @@ bool EmitPass::tryOverrideCacheOpts(
   return l1l3CacheVal != 0;
 }
 
-static bool isVolatileInst(Instruction *inst) {
-  if (!inst)
-    return false;
-
-  // TODO: Instead of this helper function inst can be casted to either
-  // ALoadInst/AStoreInst class or AbstractLoadInst/AbstractStoreInst
-  // to call inst->isVolatile() only once, after they're refactored.
-  if (auto *GII = dyn_cast<GenIntrinsicInst>(inst)) {
-    switch (GII->getIntrinsicID()) {
-    default:
-      return false;
-    case GenISAIntrinsic::GenISA_ldraw_indexed:
-    case GenISAIntrinsic::GenISA_ldrawvector_indexed:
-      return cast<LdRawIntrinsic>(inst)->isVolatile();
-    case GenISAIntrinsic::GenISA_storeraw_indexed:
-    case GenISAIntrinsic::GenISA_storerawvector_indexed:
-      return cast<StoreRawIntrinsic>(inst)->isVolatile();
-    case GenISAIntrinsic::GenISA_PredicatedLoad:
-      return cast<PredicatedLoadIntrinsic>(inst)->isVolatile();
-    case GenISAIntrinsic::GenISA_PredicatedStore:
-      return cast<PredicatedStoreIntrinsic>(inst)->isVolatile();
-    }
-  }
-
-  return inst->isVolatile();
-}
-
 LSC_CACHE_OPTS
 EmitPass::translateLSCCacheControlsFromMetadata(Instruction *inst, bool isLoad,
                                                 bool isTGM) const {
@@ -23288,7 +23261,7 @@ EmitPass::translateLSCCacheControlsFromMetadata(Instruction *inst, bool isLoad,
     return translateLSCCacheControlsFromValue(MD->getValue(), isLoad);
   }
   node = inst ? inst->getMetadata(LLVMContext::MD_nontemporal) : nullptr;
-  if (node || isVolatileInst(inst)) {
+  if (node) {
     return {LSC_CACHING_UNCACHED, LSC_CACHING_UNCACHED};
   }