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

[via llvm-commits]

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

Remove reference to `Options.UnsafeFPMath`, which should be obsolete and `AllowFPOpFusion` also handles it.

>From f009e05a7415a319ef20f7ab9aa6f32d59010cd5 Mon Sep 17 00:00:00 2001
From: PaperChalice <liujunchang97 at outlook.com>
Date: Wed, 19 Feb 2025 16:57:20 +0800
Subject: [PATCH] [SelectionDAG] Remove UnsafeFPMath check in
 `visitFADDForFMACombine`

---
 llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index f4caaf426de6a..00f83f4a100d4 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -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;
   // If the addition is not contractable, do not combine.
   if (!AllowFusionGlobally && !N->getFlags().hasAllowContract())
     return SDValue();