[llvm] Add FeatureFuseLiterals as SubTargetFeature for Grace and Olympus (PR #160257)

[Sushant Gokhale via llvm-commits]

sushgokh wrote:

> Can we fix that directly? Either by changing how constants are materialized or making is so there isn't the load in the entry block of whatever function is causing the problem?

Now I see what you mean. Let me check the way constants are materialized and see if this can be made core specific

https://github.com/llvm/llvm-project/pull/160257