[llvm] [AArch64] Avoid streaming mode hazards from FP constant stores (PR #114207)

[Matt Arsenault via llvm-commits]

================
@@ -489,6 +489,10 @@ class TargetLoweringBase {
     return true;
   }
 
+  /// Returns true if a floating-point load or store can be replaced with an
+  /// equivalent integer load or store without negatively affecting performance.
+  virtual bool canUseIntLoadStoreForFloatValues() const { return true; }
----------------
arsenm wrote:

Can you avoid adding a super specific I-want-this-specific-thing-in-one-place style of hook? I would expect this is already expressible in terms of legal operations 

https://github.com/llvm/llvm-project/pull/114207