AMDGPU: Remove isFloatTy check in atomicrmw integer min/max handling

Author: arsenm

llvm/lib/Target/AMDGPU/SIISelLowering.cpp

@@ -16086,10 +16086,6 @@ SITargetLowering::shouldExpandAtomicRMWInIR(AtomicRMWInst *RMW) const {
   case AtomicRMWInst::UMax: {
     if (AMDGPU::isFlatGlobalAddrSpace(AS) ||
         AS == AMDGPUAS::BUFFER_FAT_POINTER) {
-      if (RMW->getType()->isFloatTy() &&
-          unsafeFPAtomicsDisabled(RMW->getFunction()))
-        return AtomicExpansionKind::CmpXChg;
-
       // Always expand system scope min/max atomics.
       if (HasSystemScope)
         return AtomicExpansionKind::CmpXChg;