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-rw-r--r--llvm/docs/CommandGuide/llvm-exegesis.rst3
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/docs/CommandGuide/llvm-exegesis.rst b/llvm/docs/CommandGuide/llvm-exegesis.rst
index 0a5b099..31be33c 100644
--- a/llvm/docs/CommandGuide/llvm-exegesis.rst
+++ b/llvm/docs/CommandGuide/llvm-exegesis.rst
@@ -175,7 +175,8 @@ OPTIONS
.. option:: -opcode-index=<LLVM opcode index>
- Specify the opcode to measure, by index. See example 1 for details.
+ Specify the opcode to measure, by index. Specifying `-1` will result
+ in measuring every existing opcode. See example 1 for details.
Either `opcode-index`, `opcode-name` or `snippets-file` must be set.
.. option:: -opcode-name=<opcode name 1>,<opcode name 2>,...