[llvm] [ARM] Remove `UnsafeFPMath` uses (PR #151275)

[David Green via llvm-commits]

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@@ -186,6 +186,9 @@ class ARMSubtarget : public ARMGenSubtargetInfo {
   /// IsLittle - The target is Little Endian
   bool IsLittle;
 
+  /// DM - Denormal mode
+  DenormalMode DM;
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davemgreen wrote:

If this subtarget/HasNEONForFP part is separable and can be committed on its own it would help simplify what remains.

https://github.com/llvm/llvm-project/pull/151275