[llvm] [DAGCombiner] Remove NoSignedZerosFPMath in visitFNEG (PR #162052)

[via llvm-commits]

https://github.com/paperchalice created https://github.com/llvm/llvm-project/pull/162052

None

>From 67c7d1cda01b91a6ab76c50e38e3038e4af9d83c Mon Sep 17 00:00:00 2001
From: PaperChalice <liujunchang97 at outlook.com>
Date: Mon, 6 Oct 2025 17:20:53 +0800
Subject: [PATCH] [DAGCombiner] Remove NoSignedZerosFPMath in visitFNEG

---
 llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 204e1f0c75e00..d104d8a2967b6 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -19301,9 +19301,8 @@ SDValue DAGCombiner::visitFNEG(SDNode *N) {
   // FIXME: This is duplicated in getNegatibleCost, but getNegatibleCost doesn't
   // know it was called from a context with a nsz flag if the input fsub does
   // not.
-  if (N0.getOpcode() == ISD::FSUB &&
-      (DAG.getTarget().Options.NoSignedZerosFPMath ||
-       N->getFlags().hasNoSignedZeros()) && N0.hasOneUse()) {
+  if (N0.getOpcode() == ISD::FSUB && N->getFlags().hasNoSignedZeros() &&
+      N0.hasOneUse()) {
     return DAG.getNode(ISD::FSUB, SDLoc(N), VT, N0.getOperand(1),
                        N0.getOperand(0));
   }