[PATCH] D66438: [llvm-extract] Update the help message for group extraction feature

[Jinsong Ji via Phabricator via llvm-commits]

jsji updated this revision to Diff 216231.
jsji added a comment.

Use 'extract' instead of 'split'.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D66438/new/

https://reviews.llvm.org/D66438

Files:
  llvm/tools/llvm-extract/llvm-extract.cpp


Index: llvm/tools/llvm-extract/llvm-extract.cpp
===================================================================
--- llvm/tools/llvm-extract/llvm-extract.cpp
+++ llvm/tools/llvm-extract/llvm-extract.cpp
@@ -74,8 +74,18 @@
 
 // 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>


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