[clang] [llvm] [mlir] IR: Promote "denormal-fp-math" to a first class attribute (PR #174293)

[Matt Arsenault via cfe-commits]

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@@ -400,6 +400,10 @@ def CoroDestroyOnlyWhenComplete : EnumAttr<"coro_only_destroy_when_complete", In
 /// pipeline to perform elide on the call or invoke instruction.
 def CoroElideSafe : EnumAttr<"coro_elide_safe", IntersectPreserve, [FnAttr]>;
 
+/// Indicate the denormal handling of the default floating-point
+/// environment.
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arsenm wrote:

The denormal handling is part of the floating-point environment 

https://github.com/llvm/llvm-project/pull/174293