[llvm] [AMDGPU] Remove `NoNaNsFPMath` uses (PR #180469)

[via llvm-commits]

https://github.com/paperchalice created https://github.com/llvm/llvm-project/pull/180469

None

>From 05adb08a47ff350e49aee569fb38667afc832bfc Mon Sep 17 00:00:00 2001
From: PaperChalice <liujunchang97 at outlook.com>
Date: Mon, 9 Feb 2026 13:31:56 +0800
Subject: [PATCH] [AMDGPU] Remove `NoNaNsFPMath` uses

---
 llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp  | 3 +--
 llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
index 466cc6a5156d4..b75b36298109e 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
@@ -2845,8 +2845,7 @@ SDValue AMDGPUTargetLowering::LowerFLOGCommon(SDValue Op,
     R = getMad(DAG, DL, VT, YH, CH, Mad1);
   }
 
-  const bool IsFiniteOnly =
-      (Flags.hasNoNaNs() || Options.NoNaNsFPMath) && Flags.hasNoInfs();
+  const bool IsFiniteOnly = Flags.hasNoNaNs() && Flags.hasNoInfs();
 
   // TODO: Check if known finite from source value.
   if (!IsFiniteOnly) {
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
index 6d4e4e64280c1..543d0c940babd 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
@@ -3630,8 +3630,7 @@ bool AMDGPULegalizerInfo::legalizeFlogCommon(MachineInstr &MI,
   }
 
   const bool IsFiniteOnly =
-      (MI.getFlag(MachineInstr::FmNoNans) || TM.Options.NoNaNsFPMath) &&
-      MI.getFlag(MachineInstr::FmNoInfs);
+      MI.getFlag(MachineInstr::FmNoNans) && MI.getFlag(MachineInstr::FmNoInfs);
 
   if (!IsFiniteOnly) {
     // Expand isfinite(x) => fabs(x) < inf