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

[Sander de Smalen via llvm-commits]

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@@ -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; }
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sdesmalen-arm wrote:

What about creating a `virtual EVT TargetLowering::getPreferredStoreTypeForConstant(SDNode *C) const;` that returns an appropriate type? This could then also do the check to see if the integer type is legal, for example.

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