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

[David Green via llvm-commits]

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@@ -629,6 +629,15 @@ static bool checkDenormalAttributeConsistency(const Module &M,
   });
 }
 
+// Returns true if all functions have different denormal modes.
+static bool checkDenormalAttributeInconsistency(const Module &M) {
+  if (M.functions().empty())
+    return false;
+  DenormalMode Value = M.functions().begin()->getDenormalModeRaw();
+  return any_of(
+      M, [&](const Function &F) { return F.getDenormalModeRaw() != Value; });
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davemgreen wrote:

Exclude any declarations, as they will always not have attributes.

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