[llvm] [SPARC] Use FMA instructions when we have UA2007 (PR #148434)

[via llvm-commits]

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@@ -3570,6 +3572,15 @@ bool SparcTargetLowering::isCheapToSpeculateCttz(Type *Ty) const {
   return isCheapToSpeculateCtlz(Ty);
 }
 
+bool SparcTargetLowering::isFMAFasterThanFMulAndFAdd(const MachineFunction &MF,
+                                                     EVT VT) const {
+  return Subtarget->isUA2007();
+}
+
+bool SparcTargetLowering::enableAggressiveFMAFusion(EVT VT) const {
+  return Subtarget->isUA2007();
+}
+
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koachan wrote:

Would it be safe if I change those to return a constant `true`?
Given that on targets without UA2007 FMAs are going to be expanded anyway...

https://github.com/llvm/llvm-project/pull/148434