[llvm] [SelectionDAG] Remove UnsafeFPMath check in `visitFADDForFMACombine` (PR #127770)

[via llvm-commits]

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@@ -16320,8 +16320,8 @@ SDValue DAGCombiner::visitFADDForFMACombine(SDNode *N) {
   if (!HasFMAD && !HasFMA)
     return SDValue();
 
-  bool AllowFusionGlobally = (Options.AllowFPOpFusion == FPOpFusion::Fast ||
-                              Options.UnsafeFPMath || HasFMAD);
+  bool AllowFusionGlobally =
+      Options.AllowFPOpFusion == FPOpFusion::Fast || HasFMAD;
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paperchalice wrote:

Currently only drop `unsafe-fp-math` in global fusion and handle regressions, I will handle `visitFSUBForFMACombine` later. Eliminate other `UnsafeFPMath`s would be a long term goal.


https://github.com/llvm/llvm-project/pull/127770