Comment change. NFC

That comment misleads the current discussions in mentioned bug. Leave
the discussions to the bug. Also, adding a future change FIXME.

llvm-svn: 238653

Author: rengolin

llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp

@@ -9168,14 +9168,13 @@ bool ARMAsmParser::parseDirectiveCPU(SMLoc L) {
   StringRef CPU = getParser().parseStringToEndOfStatement().trim();
   getTargetStreamer().emitTextAttribute(ARMBuildAttrs::CPU_name, CPU);
 
+  // FIXME: This is using table-gen data, but should be moved to
+  // ARMTargetParser once that is table-gen'd.
   if (!STI.isCPUStringValid(CPU)) {
     Error(L, "Unknown CPU name");
     return false;
   }
 
-  // FIXME: This switches the CPU features globally, therefore it might
-  // happen that code you would not expect to assemble will. For details
-  // see: http://llvm.org/bugs/show_bug.cgi?id=20757
   STI.InitMCProcessorInfo(CPU, "");
   STI.InitCPUSchedModel(CPU);
   setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));