[llvm-reduce] Display all relevant options in -help

Previously the options category given to cl::HideUnrelatedOptions was
local to llvm-reduce.cpp and as a result only options declared in that
file were visible in the -help options listing. This was a bit
unfortunate since there were several useful options declared in other
files. This patch addresses that.

Differential Revision: https://reviews.llvm.org/D118682

llvm/tools/llvm-reduce/DeltaManager.cpp

@@ -37,10 +37,12 @@
 
 using namespace llvm;
 
+extern cl::OptionCategory LLVMReduceOptions;
 static cl::opt<std::string>
     DeltaPasses("delta-passes",
                 cl::desc("Delta passes to run, separated by commas. By "
-                         "default, run all delta passes."));
+                         "default, run all delta passes."),
+                cl::cat(LLVMReduceOptions));
 
 #define DELTA_PASSES                                                           \
   DELTA_PASS("special-globals", reduceSpecialGlobalsDeltaPass)                 \

llvm/tools/llvm-reduce/deltas/Delta.cpp

@@ -26,25 +26,29 @@
 
 using namespace llvm;
 
+extern cl::OptionCategory LLVMReduceOptions;
+
 static cl::opt<bool> AbortOnInvalidReduction(
     "abort-on-invalid-reduction",
-    cl::desc("Abort if any reduction results in invalid IR"));
+    cl::desc("Abort if any reduction results in invalid IR"),
+    cl::cat(LLVMReduceOptions));
 
 static cl::opt<unsigned int> StartingGranularityLevel(
     "starting-granularity-level",
-    cl::desc("Number of times to divide chunks prior to first test"));
+    cl::desc("Number of times to divide chunks prior to first test"),
+    cl::cat(LLVMReduceOptions));
 
 static cl::opt<bool> TmpFilesAsBitcode(
     "write-tmp-files-as-bitcode",
     cl::desc("Write temporary files as bitcode, instead of textual IR"),
-    cl::init(false));
+    cl::init(false), cl::cat(LLVMReduceOptions));
 
 #ifdef LLVM_ENABLE_THREADS
 static cl::opt<unsigned> NumJobs(
     "j",
     cl::desc("Maximum number of threads to use to process chunks. Set to 1 to "
              "disables parallelism."),
-    cl::init(1));
+    cl::init(1), cl::cat(LLVMReduceOptions));
 #else
 unsigned NumJobs = 1;
 #endif

llvm/tools/llvm-reduce/llvm-reduce.cpp

@@ -36,44 +36,44 @@
 
 using namespace llvm;
 
-static cl::OptionCategory Options("llvm-reduce options");
+cl::OptionCategory LLVMReduceOptions("llvm-reduce options");
 
 static cl::opt<bool> Help("h", cl::desc("Alias for -help"), cl::Hidden,
-                          cl::cat(Options));
+                          cl::cat(LLVMReduceOptions));
 static cl::opt<bool> Version("v", cl::desc("Alias for -version"), cl::Hidden,
-                             cl::cat(Options));
+                             cl::cat(LLVMReduceOptions));
 
 static cl::opt<bool>
     PrintDeltaPasses("print-delta-passes",
                      cl::desc("Print list of delta passes, passable to "
                               "--delta-passes as a comma separated list"),
-                     cl::cat(Options));
+                     cl::cat(LLVMReduceOptions));
 
 static cl::opt<std::string> InputFilename(cl::Positional, cl::Required,
                                           cl::desc("<input llvm ll/bc file>"),
-                                          cl::cat(Options));
+                                          cl::cat(LLVMReduceOptions));
 
 static cl::opt<std::string>
     TestFilename("test", cl::Required,
                  cl::desc("Name of the interesting-ness test to be run"),
-                 cl::cat(Options));
+                 cl::cat(LLVMReduceOptions));
 
 static cl::list<std::string>
     TestArguments("test-arg", cl::ZeroOrMore,
                   cl::desc("Arguments passed onto the interesting-ness test"),
-                  cl::cat(Options));
+                  cl::cat(LLVMReduceOptions));
 
 static cl::opt<std::string> OutputFilename(
     "output", cl::desc("Specify the output file. default: reduced.ll|mir"));
 static cl::alias OutputFileAlias("o", cl::desc("Alias for -output"),
                                  cl::aliasopt(OutputFilename),
-                                 cl::cat(Options));
+                                 cl::cat(LLVMReduceOptions));
 
 static cl::opt<bool>
     ReplaceInput("in-place",
                  cl::desc("WARNING: This option will replace your input file "
                           "with the reduced version!"),
-                 cl::cat(Options));
+                 cl::cat(LLVMReduceOptions));
 
 enum class InputLanguages { None, IR, MIR };
 
@@ -83,17 +83,17 @@ static cl::opt<InputLanguages>
                   cl::init(InputLanguages::None),
                   cl::values(clEnumValN(InputLanguages::IR, "ir", ""),
                              clEnumValN(InputLanguages::MIR, "mir", "")),
-                  cl::cat(Options));
+                  cl::cat(LLVMReduceOptions));
 
 static cl::opt<std::string> TargetTriple("mtriple",
                                          cl::desc("Set the target triple"),
-                                         cl::cat(Options));
+                                         cl::cat(LLVMReduceOptions));
 
 static cl::opt<int>
     MaxPassIterations("max-pass-iterations",
                       cl::desc("Maximum number of times to run the full set "
                                "of delta passes (default=1)"),
-                      cl::init(1), cl::cat(Options));
+                      cl::init(1), cl::cat(LLVMReduceOptions));
 
 static codegen::RegisterCodeGenFlags CGF;
 
@@ -135,7 +135,7 @@ static std::unique_ptr<LLVMTargetMachine> createTargetMachine() {
 int main(int Argc, char **Argv) {
   InitLLVM X(Argc, Argv);
 
-  cl::HideUnrelatedOptions({&Options, &getColorCategory()});
+  cl::HideUnrelatedOptions({&LLVMReduceOptions, &getColorCategory()});
   cl::ParseCommandLineOptions(Argc, Argv, "LLVM automatic testcase reducer.\n");
 
   bool ReduceModeMIR = false;