alive-tv: update --passes description
MODIFY
tools/alive-tv.cpp
tools/alive-tv.cpp
@@ -62,7 +62,9 @@ llvm::cl::opt<std::string> opt_tgt_fn(LLVM_ARGS_PREFIX"tgt-fn",
llvm::cl::opt<string>
optPass(LLVM_ARGS_PREFIX "passes",
llvm::cl::value_desc("optimization passes"),
- llvm::cl::desc("a parameter to specify optimization passes, separated by comma"),
+ llvm::cl::desc("Specify which LLVM passes to run (default=O2). "
+ "The syntax is described at "
+ "https://llvm.org/docs/NewPassManager.html#invoking-opt"),
llvm::cl::cat(alive_cmdargs), llvm::cl::init("O2"));

alive-tv: update --passes description (#800)