Remove \brief commands from doxygen comments.

We've been running doxygen with the autobrief option for a couple of
years now. This makes the \brief markers into our comments
redundant. Since they are a visual distraction and we don't want to
encourage more \brief markers in new code either, this patch removes
them all.

Patch produced by

  for i in $(git grep -l '\\brief'); do perl -pi -e 's/\\brief //g' $i & done

Differential Revision: https://reviews.llvm.org/D46290

llvm-svn: 331272
diff --git a/llvm/utils/TableGen/CodeGenTarget.cpp b/llvm/utils/TableGen/CodeGenTarget.cpp
index 29b553c..ebde618 100644
--- a/llvm/utils/TableGen/CodeGenTarget.cpp
+++ b/llvm/utils/TableGen/CodeGenTarget.cpp
@@ -358,7 +358,7 @@
   return array_lengthof(FixedInstrs) - 1;
 }
 
-/// \brief Return all of the instructions defined by the target, ordered by
+/// Return all of the instructions defined by the target, ordered by
 /// their enum value.
 void CodeGenTarget::ComputeInstrsByEnum() const {
   const auto &Insts = getInstructions();
diff --git a/llvm/utils/TableGen/SubtargetFeatureInfo.h b/llvm/utils/TableGen/SubtargetFeatureInfo.h
index c55c16a..71e6748 100644
--- a/llvm/utils/TableGen/SubtargetFeatureInfo.h
+++ b/llvm/utils/TableGen/SubtargetFeatureInfo.h
@@ -27,20 +27,20 @@
 /// Helper class for storing information on a subtarget feature which
 /// participates in instruction matching.
 struct SubtargetFeatureInfo {
-  /// \brief The predicate record for this feature.
+  /// The predicate record for this feature.
   Record *TheDef;
 
-  /// \brief An unique index assigned to represent this feature.
+  /// An unique index assigned to represent this feature.
   uint64_t Index;
 
   SubtargetFeatureInfo(Record *D, uint64_t Idx) : TheDef(D), Index(Idx) {}
 
-  /// \brief The name of the enumerated constant identifying this feature.
+  /// The name of the enumerated constant identifying this feature.
   std::string getEnumName() const {
     return "Feature_" + TheDef->getName().str();
   }
 
-  /// \brief The name of the enumerated constant identifying the bitnumber for
+  /// The name of the enumerated constant identifying the bitnumber for
   /// this feature.
   std::string getEnumBitName() const {
     return "Feature_" + TheDef->getName().str() + "Bit";
diff --git a/llvm/utils/TableGen/X86RecognizableInstr.h b/llvm/utils/TableGen/X86RecognizableInstr.h
index 75354c1..a4b0777 100644
--- a/llvm/utils/TableGen/X86RecognizableInstr.h
+++ b/llvm/utils/TableGen/X86RecognizableInstr.h
@@ -272,7 +272,7 @@
   static OperandEncoding writemaskRegisterEncodingFromString(const std::string &s,
                                                              uint8_t OpSize);
 
-  /// \brief Adjust the encoding type for an operand based on the instruction.
+  /// Adjust the encoding type for an operand based on the instruction.
   void adjustOperandEncoding(OperandEncoding &encoding);
 
   /// handleOperand - Converts a single operand from the LLVM table format to