diff options
| -rw-r--r-- | llvm/tools/llvm-extract/llvm-extract.cpp | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/llvm/tools/llvm-extract/llvm-extract.cpp b/llvm/tools/llvm-extract/llvm-extract.cpp index b74b76e78eb..dddc0d9baa0 100644 --- a/llvm/tools/llvm-extract/llvm-extract.cpp +++ b/llvm/tools/llvm-extract/llvm-extract.cpp @@ -74,8 +74,18 @@ static cl::list<std::string> // ExtractBlocks - The blocks to extract from the module. static cl::list<std::string> ExtractBlocks( - "bb", cl::desc("Specify <function, basic block> pairs to extract"), - cl::ZeroOrMore, cl::value_desc("function:bb"), cl::cat(ExtractCat)); + "bb", + cl::desc( + "Specify <function, basic block1[;basic block2...]> pairs to extract.\n" + "Each pair will create a function.\n" + "If multiple basic blocks are specified in one pair,\n" + "the first block in the sequence should dominate the rest.\n" + "eg:\n" + " --bb=f:bb1;bb2 will extract one function with both bb1 and bb2;\n" + " --bb=f:bb1 --bb=f:bb2 will extract two functions, one with bb1, one " + "with bb2."), + cl::ZeroOrMore, cl::value_desc("function:bb1[;bb2...]"), + cl::cat(ExtractCat)); // ExtractAlias - The alias to extract from the module. static cl::list<std::string> |
