[llvm] [CodeGen] Don't derive MODereferenceable from !dereferenceable metadata (PR #222069)

[Cullen Rhodes via llvm-commits]

================
@@ -2355,7 +2355,6 @@ FastISel::createMachineMemOperandFor(const Instruction *I) const {
 
   bool IsNonTemporal = I->hasMetadata(LLVMContext::MD_nontemporal);
----------------
c-rhodes wrote:

those checks are expensive, I disabled them on GISel O0 (#195012) after noticing FastISel wasn't doing them

https://github.com/llvm/llvm-project/pull/222069