[llvm] [SelectionDAG] Remove `NoNaNsFPMath` in `visitFCmp` (PR #163519)

[via llvm-commits]

https://github.com/paperchalice created https://github.com/llvm/llvm-project/pull/163519

None

>From f085d3f2a8381781b3b2985e3c1a7d1d2b484783 Mon Sep 17 00:00:00 2001
From: PaperChalice <liujunchang97 at outlook.com>
Date: Wed, 15 Oct 2025 15:21:30 +0800
Subject: [PATCH] [SelectionDAG] Remove `NoNaNsFPMath` in `visitFCmp`

---
 llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 0f2b5188fc10a..aa8b1c0601dc4 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -3711,7 +3711,7 @@ void SelectionDAGBuilder::visitFCmp(const FCmpInst &I) {
 
   ISD::CondCode Condition = getFCmpCondCode(predicate);
   auto *FPMO = cast<FPMathOperator>(&I);
-  if (FPMO->hasNoNaNs() || TM.Options.NoNaNsFPMath)
+  if (FPMO->hasNoNaNs())
     Condition = getFCmpCodeWithoutNaN(Condition);
 
   SDNodeFlags Flags;