Remove UnsafeFPMath in AMDGPUTargetTransformInfo.cpp

Author: paperchalice

llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp

@@ -597,7 +597,6 @@ InstructionCost GCNTTIImpl::getArithmeticInstrCost(
           // Estimate all types may be fused with contract/unsafe flags
           const TargetOptions &Options = TLI->getTargetMachine().Options;
           if (Options.AllowFPOpFusion == FPOpFusion::Fast ||
-              Options.UnsafeFPMath ||
               (FAdd->hasAllowContract() && CxtI->hasAllowContract()))
             return TargetTransformInfo::TCC_Free;
         }
@@ -650,8 +649,7 @@ InstructionCost GCNTTIImpl::getArithmeticInstrCost(
       return LT.first * Cost * NElts;
     }
 
-    if (SLT == MVT::f32 && ((CxtI && CxtI->hasApproxFunc()) ||
-                            TLI->getTargetMachine().Options.UnsafeFPMath)) {
+    if (SLT == MVT::f32 && (CxtI && CxtI->hasApproxFunc())) {
       // Fast unsafe fdiv lowering:
       // f32 rcp
       // f32 fmul