[llvm] [NFC][AMDGPU] Let IR level callers query the FMA/FMAD predicates (PR #213310)

[Matt Arsenault via llvm-commits]

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@@ -505,6 +503,14 @@ class SITargetLowering final : public AMDGPUTargetLowering {
   bool isFMADLegal(const SelectionDAG &DAG, const SDNode *N) const override;
   bool isFMADLegal(const MachineInstr &MI, const LLT Ty) const override;
 
+  /// Variants taking the denormal mode directly, for IR level callers which
+  /// have no MachineFunction to read it from. \p VT is the legalized type of
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arsenm wrote:

The IR version has a Function which has the FP mode?

https://github.com/llvm/llvm-project/pull/213310