MIPS: change FeatureMadd4 to FeatureNoMadd4

[wzssyqa]

Summary

FeatureMadd4 here is used to disable madd4, and the option is

(+-)nomadd4

This word is so confused here.
Changing to FeatureNoMadd4 makes it much more clear.

[atanasyan]

LGTM

Do you have commit access?

[wzssyqa]

In D83780#2150683, @atanasyan wrote:

LGTM

Do you have commit access?

No. I don't have.

llvm/lib/Target/Mips/Mips.td

def FeatureCnMipsP : SubtargetFeature<"cnmipsp", "HasCnMipsP",
                                       "true", "Octeon+ cnMIPS Support",
                                       [FeatureCnMips]>;
 
 def FeatureUseTCCInDIV : SubtargetFeature<
                                "use-tcc-in-div",
                                "UseTCCInDIV", "false",
                                "Force the assembler to use trapping">;
 
-def FeatureMadd4
+def FeatureNoMadd4
     : SubtargetFeature<"nomadd4", "DisableMadd4", "true",
                        "Disable 4-operand madd.fmt and related instructions">;
 
 def FeatureMT : SubtargetFeature<"mt", "HasMT", "true", "Mips MT ASE">;
 
 def FeatureLongCalls : SubtargetFeature<"long-calls", "UseLongCalls", "true",
                                         "Disable use of the jal instruction">;
 

llvm/lib/Target/Mips/MipsInstrInfo.td

 def IsBE           :  Predicate<"!Subtarget->isLittle()">;
 def IsNotNaCl    :    Predicate<"!Subtarget->isTargetNaCl()">;
 def UseTCCInDIV    :  AssemblerPredicate<(all_of FeatureUseTCCInDIV)>;
 def HasEVA       :    Predicate<"Subtarget->hasEVA()">,
                       AssemblerPredicate<(all_of FeatureEVA)>;
 def HasMSA : Predicate<"Subtarget->hasMSA()">,
              AssemblerPredicate<(all_of FeatureMSA)>;
 def HasMadd4 : Predicate<"!Subtarget->disableMadd4()">,
-               AssemblerPredicate<(all_of (not FeatureMadd4))>;
+               AssemblerPredicate<(all_of (not FeatureNoMadd4))>;
 def HasMT  : Predicate<"Subtarget->hasMT()">,
              AssemblerPredicate<(all_of FeatureMT)>;
 def UseIndirectJumpsHazard : Predicate<"Subtarget->useIndirectJumpsHazard()">,
                             AssemblerPredicate<(all_of FeatureUseIndirectJumpsHazard)>;
 def NoIndirectJumpGuards : Predicate<"!Subtarget->useIndirectJumpsHazard()">,
                            AssemblerPredicate<(all_of (not FeatureUseIndirectJumpsHazard))>;
 def HasCRC   : Predicate<"Subtarget->hasCRC()">,
                AssemblerPredicate<(all_of FeatureCRC)>;