[tablegen] Use categories on options that only matter to one emitter.

Summary:
The categories are emitted in a strange order in this patch due to a bug in the
CommandLine library.

Reviewers: ab

Reviewed By: ab

Subscribers: ab, llvm-commits

Differential Revision: https://reviews.llvm.org/D30995

llvm-svn: 298843

1 files changed, 5 insertions, 2 deletions

diff --git a/llvm/utils/TableGen/AsmMatcherEmitter.cpp b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
index 73dddc4846c..5953bdc7301 100644
--- a/llvm/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
@@ -123,9 +123,12 @@ using namespace llvm;
 
 #define DEBUG_TYPE "asm-matcher-emitter"
 
+cl::OptionCategory AsmMatcherEmitterCat("Options for -gen-asm-matcher");
+
 static cl::opt<std::string>
-MatchPrefix("match-prefix", cl::init(""),
-            cl::desc("Only match instructions with the given prefix"));
+    MatchPrefix("match-prefix", cl::init(""),
+                cl::desc("Only match instructions with the given prefix"),
+                cl::cat(AsmMatcherEmitterCat));
 
 namespace {
 class AsmMatcherInfo;