Addressing review comments

Author: AnastasiyaChernikova

llvm/tools/llvm-exegesis/lib/RISCV/Target.cpp

@@ -101,9 +101,8 @@ bool ExegesisRISCVTarget::checkOpcodeSupported(
   FeatureBitset AvailableFeatures =
       RISCV_MC::computeAvailableFeatures(Features);
   FeatureBitset RequiredFeatures = RISCV_MC::computeRequiredFeatures(Opcode);
-  FeatureBitset MissingFeatures =
-      (AvailableFeatures & RequiredFeatures) ^ RequiredFeatures;
-  return !(MissingFeatures.none());
+  FeatureBitset MissingFeatures = RequiredFeatures & ~AvailableFeatures;
+  return MissingFeatures.none();
 }
 
 #define GET_REGISTER_MATCHER

llvm/tools/llvm-exegesis/lib/SerialSnippetGenerator.cpp

@@ -52,7 +52,7 @@ computeAliasingInstructions(const LLVMState &State, const Instruction *Instr,
       continue;
     if (OtherOpcode == Instr->Description.getOpcode())
       continue;
-    if (State.getExegesisTarget().checkOpcodeSupported(
+    if (!State.getExegesisTarget().checkOpcodeSupported(
             OtherOpcode, State.getSubtargetInfo()))
       continue;
     const Instruction &OtherInstr = State.getIC().getInstr(OtherOpcode);