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/Transforms/Scalar/LoopStrengthReduce.cpp b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 2d8b546..4c0b3cc 100644
--- a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -446,7 +446,7 @@
   canonicalize(*L);
 }
 
-/// \brief Check whether or not this formula satisfies the canonical
+/// Check whether or not this formula satisfies the canonical
 /// representation.
 /// \see Formula::BaseRegs.
 bool Formula::isCanonical(const Loop &L) const {
@@ -474,7 +474,7 @@
   return I == BaseRegs.end();
 }
 
-/// \brief Helper method to morph a formula into its canonical representation.
+/// Helper method to morph a formula into its canonical representation.
 /// \see Formula::BaseRegs.
 /// Every formula having more than one base register, must use the ScaledReg
 /// field. Otherwise, we would have to do special cases everywhere in LSR
@@ -509,7 +509,7 @@
   }
 }
 
-/// \brief Get rid of the scale in the formula.
+/// Get rid of the scale in the formula.
 /// In other words, this method morphes reg1 + 1*reg2 into reg1 + reg2.
 /// \return true if it was possible to get rid of the scale, false otherwise.
 /// \note After this operation the formula may not be in the canonical form.
@@ -974,7 +974,7 @@
 
 } // end anonymous namespace
 
-/// \brief Check if the addressing mode defined by \p F is completely
+/// Check if the addressing mode defined by \p F is completely
 /// folded in \p LU at isel time.
 /// This includes address-mode folding and special icmp tricks.
 /// This function returns true if \p LU can accommodate what \p F
@@ -3515,7 +3515,7 @@
   return false;
 }
 
-/// \brief Helper function for LSRInstance::GenerateReassociations.
+/// Helper function for LSRInstance::GenerateReassociations.
 void LSRInstance::GenerateReassociationsImpl(LSRUse &LU, unsigned LUIdx,
                                              const Formula &Base,
                                              unsigned Depth, size_t Idx,
@@ -3653,7 +3653,7 @@
   }
 }
 
-/// \brief Helper function for LSRInstance::GenerateSymbolicOffsets.
+/// Helper function for LSRInstance::GenerateSymbolicOffsets.
 void LSRInstance::GenerateSymbolicOffsetsImpl(LSRUse &LU, unsigned LUIdx,
                                               const Formula &Base, size_t Idx,
                                               bool IsScaledReg) {
@@ -3685,7 +3685,7 @@
                                 /* IsScaledReg */ true);
 }
 
-/// \brief Helper function for LSRInstance::GenerateConstantOffsets.
+/// Helper function for LSRInstance::GenerateConstantOffsets.
 void LSRInstance::GenerateConstantOffsetsImpl(
     LSRUse &LU, unsigned LUIdx, const Formula &Base,
     const SmallVectorImpl<int64_t> &Worklist, size_t Idx, bool IsScaledReg) {