Make llvm-as --help great again

This is a follow-up to https://reviews.llvm.org/D60411, but for llvm-as.

New output:

    OVERVIEW: llvm .ll -> .bc assembler

    USAGE: llvm-as [options] <input .llvm file>

    OPTIONS:

    Generic Options:

      -help                        - Display available options (-help-hidden for more)
      -help-list                   - Display list of available options (-help-list-hidden for more)
      -version                     - Display the version of this program

    llvm-as Options:

      -data-layout=<layout-string> - data layout string to use
      -disable-output              - Disable output
      -f                           - Enable binary output on terminals
      -module-hash                 - Emit module hash
      -o=<filename>                - Override output filename

Differential Revision: https://reviews.llvm.org/D60603

llvm-svn: 361750

1 files changed, 14 insertions, 8 deletions

diff --git a/llvm/tools/llvm-as/llvm-as.cpp b/llvm/tools/llvm-as/llvm-as.cpp
index 8f8d10ff572..234fef907a3 100644
--- a/llvm/tools/llvm-as/llvm-as.cpp
+++ b/llvm/tools/llvm-as/llvm-as.cpp
@@ -30,38 +30,43 @@
 #include <memory>
 using namespace llvm;
 
+cl::OptionCategory AsCat("llvm-as Options");
+
 static cl::opt<std::string> InputFilename(cl::Positional,
                                           cl::desc("<input .llvm file>"),
                                           cl::init("-"));
 
 static cl::opt<std::string> OutputFilename("o",
                                            cl::desc("Override output filename"),
-                                           cl::value_desc("filename"));
+                                           cl::value_desc("filename"),
+                                           cl::cat(AsCat));
 
-static cl::opt<bool> Force("f", cl::desc("Enable binary output on terminals"));
+static cl::opt<bool> Force("f", cl::desc("Enable binary output on terminals"),
+                           cl::cat(AsCat));
 
 static cl::opt<bool> DisableOutput("disable-output", cl::desc("Disable output"),
-                                   cl::init(false));
+                                   cl::init(false), cl::cat(AsCat));
 
 static cl::opt<bool> EmitModuleHash("module-hash", cl::desc("Emit module hash"),
-                                    cl::init(false));
+                                    cl::init(false), cl::cat(AsCat));
 
 static cl::opt<bool> DumpAsm("d", cl::desc("Print assembly as parsed"),
-                             cl::Hidden);
+                             cl::Hidden, cl::cat(AsCat));
 
 static cl::opt<bool>
     DisableVerify("disable-verify", cl::Hidden,
-                  cl::desc("Do not run verifier on input LLVM (dangerous!)"));
+                  cl::desc("Do not run verifier on input LLVM (dangerous!)"),
+                  cl::cat(AsCat));
 
 static cl::opt<bool> PreserveBitcodeUseListOrder(
     "preserve-bc-uselistorder",
     cl::desc("Preserve use-list order when writing LLVM bitcode."),
-    cl::init(true), cl::Hidden);
+    cl::init(true), cl::Hidden, cl::cat(AsCat));
 
 static cl::opt<std::string> ClDataLayout("data-layout",
                                          cl::desc("data layout string to use"),
                                          cl::value_desc("layout-string"),
-                                         cl::init(""));
+                                         cl::init(""), cl::cat(AsCat));
 
 static void WriteOutputFile(const Module *M, const ModuleSummaryIndex *Index) {
   // Infer the output filename if needed.
@@ -109,6 +114,7 @@ static void WriteOutputFile(const Module *M, const ModuleSummaryIndex *Index) {
 int main(int argc, char **argv) {
   InitLLVM X(argc, argv);
   LLVMContext Context;
+  cl::HideUnrelatedOptions(AsCat);
   cl::ParseCommandLineOptions(argc, argv, "llvm .ll -> .bc assembler\n");
 
   // Parse the file now...