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/lib/CodeGen/RegAllocPBQP.cpp b/llvm/lib/CodeGen/RegAllocPBQP.cpp
index a71f839..7ce4438 100644
--- a/llvm/lib/CodeGen/RegAllocPBQP.cpp
+++ b/llvm/lib/CodeGen/RegAllocPBQP.cpp
@@ -160,25 +160,25 @@
   /// always available for the remat of all the siblings of the original reg.
   SmallPtrSet<MachineInstr *, 32> DeadRemats;
 
-  /// \brief Finds the initial set of vreg intervals to allocate.
+  /// Finds the initial set of vreg intervals to allocate.
   void findVRegIntervalsToAlloc(const MachineFunction &MF, LiveIntervals &LIS);
 
-  /// \brief Constructs an initial graph.
+  /// Constructs an initial graph.
   void initializeGraph(PBQPRAGraph &G, VirtRegMap &VRM, Spiller &VRegSpiller);
 
-  /// \brief Spill the given VReg.
+  /// Spill the given VReg.
   void spillVReg(unsigned VReg, SmallVectorImpl<unsigned> &NewIntervals,
                  MachineFunction &MF, LiveIntervals &LIS, VirtRegMap &VRM,
                  Spiller &VRegSpiller);
 
-  /// \brief Given a solved PBQP problem maps this solution back to a register
+  /// Given a solved PBQP problem maps this solution back to a register
   /// assignment.
   bool mapPBQPToRegAlloc(const PBQPRAGraph &G,
                          const PBQP::Solution &Solution,
                          VirtRegMap &VRM,
                          Spiller &VRegSpiller);
 
-  /// \brief Postprocessing before final spilling. Sets basic block "live in"
+  /// Postprocessing before final spilling. Sets basic block "live in"
   /// variables.
   void finalizeAlloc(MachineFunction &MF, LiveIntervals &LIS,
                      VirtRegMap &VRM) const;