Remove \brief commands from doxygen comments.

This is similar to the LLVM change https://reviews.llvm.org/D46290.

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

Differential Revision: https://reviews.llvm.org/D46320

llvm-svn: 331834
diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index 99e4b0d..4e25c72 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -749,7 +749,7 @@
       : TargetCodeGenInfo(new WebAssemblyABIInfo(CGT)) {}
 };
 
-/// \brief Classify argument of given type \p Ty.
+/// Classify argument of given type \p Ty.
 ABIArgInfo WebAssemblyABIInfo::classifyArgumentType(QualType Ty) const {
   Ty = useFirstFieldIfTransparentUnion(Ty);
 
@@ -844,7 +844,7 @@
   return EmitVAArgInstr(CGF, VAListAddr, Ty, ABIArgInfo::getDirect());
 }
 
-/// \brief Classify argument of given type \p Ty.
+/// Classify argument of given type \p Ty.
 ABIArgInfo PNaClABIInfo::classifyArgumentType(QualType Ty) const {
   if (isAggregateTypeForABI(Ty)) {
     if (CGCXXABI::RecordArgABI RAA = getRecordArgABI(Ty, getCXXABI()))
@@ -945,7 +945,7 @@
 // X86-32 ABI Implementation
 //===----------------------------------------------------------------------===//
 
-/// \brief Similar to llvm::CCState, but for Clang.
+/// Similar to llvm::CCState, but for Clang.
 struct CCState {
   CCState(unsigned CC) : CC(CC), FreeRegs(0), FreeSSERegs(0) {}
 
@@ -998,14 +998,14 @@
 
   ABIArgInfo getIndirectReturnResult(QualType Ty, CCState &State) const;
 
-  /// \brief Return the alignment to use for the given type on the stack.
+  /// Return the alignment to use for the given type on the stack.
   unsigned getTypeStackAlignInBytes(QualType Ty, unsigned Align) const;
 
   Class classify(QualType Ty) const;
   ABIArgInfo classifyReturnType(QualType RetTy, CCState &State) const;
   ABIArgInfo classifyArgumentType(QualType RetTy, CCState &State) const;
 
-  /// \brief Updates the number of available free registers, returns 
+  /// Updates the number of available free registers, returns 
   /// true if any registers were allocated.
   bool updateFreeRegs(QualType Ty, CCState &State) const;
 
@@ -1015,7 +1015,7 @@
 
   bool canExpandIndirectArgument(QualType Ty) const;
 
-  /// \brief Rewrite the function info so that all memory arguments use
+  /// Rewrite the function info so that all memory arguments use
   /// inalloca.
   void rewriteWithInAlloca(CGFunctionInfo &FI) const;