[llvm] [AMDGPU] Inline mayIgnoreSignedZero into raw flag check (NFC) (PR #217580)

[Arseniy Obolenskiy via llvm-commits]

https://github.com/aobolensk created https://github.com/llvm/llvm-project/pull/217580

Precommit for https://github.com/llvm/llvm-project/pull/217573 

>From dfd73fa0ce153ff777d5c666b43203b4181581fb Mon Sep 17 00:00:00 2001
From: Arseniy Obolenskiy <arseniy.obolenskiy at amd.com>
Date: Thu, 20 Aug 2026 12:30:18 +0200
Subject: [PATCH] [AMDGPU] Inline mayIgnoreSignedZero into raw flag check (NFC)

---
 llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp | 12 ++----------
 llvm/lib/Target/AMDGPU/AMDGPUISelLowering.h   |  2 --
 2 files changed, 2 insertions(+), 12 deletions(-)

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
index 3f93ca66dca17..7acc9ca2bafbd 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
@@ -648,14 +648,6 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(const TargetMachine &TM,
   setMaxLargeFPConvertBitWidthSupported(64);
 }
 
-bool AMDGPUTargetLowering::mayIgnoreSignedZero(SDValue Op) const {
-  const auto Flags = Op.getNode()->getFlags();
-  if (Flags.hasNoSignedZeros())
-    return true;
-
-  return false;
-}
-
 //===----------------------------------------------------------------------===//
 // Target Information
 //===----------------------------------------------------------------------===//
@@ -5230,7 +5222,7 @@ SDValue AMDGPUTargetLowering::performFNegCombine(SDNode *N,
   SDLoc SL(N);
   switch (Opc) {
   case ISD::FADD: {
-    if (!mayIgnoreSignedZero(N0) && !N->getFlags().hasNoSignedZeros())
+    if (!N0->getFlags().hasNoSignedZeros() && !N->getFlags().hasNoSignedZeros())
       return SDValue();
 
     // (fneg (fadd x, y)) -> (fadd (fneg x), (fneg y))
@@ -5278,7 +5270,7 @@ SDValue AMDGPUTargetLowering::performFNegCombine(SDNode *N,
   case ISD::FMA:
   case ISD::FMAD: {
     // TODO: handle llvm.amdgcn.fma.legacy
-    if (!mayIgnoreSignedZero(N0) && !N->getFlags().hasNoSignedZeros())
+    if (!N0->getFlags().hasNoSignedZeros() && !N->getFlags().hasNoSignedZeros())
       return SDValue();
 
     // (fneg (fma x, y, z)) -> (fma x, (fneg y), (fneg z))
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.h b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.h
index f24f33e7dcb70..912315532b7d5 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.h
@@ -194,8 +194,6 @@ class AMDGPUTargetLowering : public TargetLowering {
   AMDGPUTargetLowering(const TargetMachine &TM, const TargetSubtargetInfo &STI,
                        const AMDGPUSubtarget &AMDGPUSTI);
 
-  bool mayIgnoreSignedZero(SDValue Op) const;
-
   static inline SDValue stripBitcast(SDValue Val) {
     return Val.getOpcode() == ISD::BITCAST ? Val.getOperand(0) : Val;
   }