[Docs][llvm-exegesis] Add documentation on recently added options

[boomanaiden154]

This patch adds information on the new LLVM-EXEGESIS-SNIPPET-ADDRESS annotation and on the --benchmark-repeat-count flag.

[llvmbot]

@llvm/pr-subscribers-llvm-binary-utilities

Author: Aiden Grossman (boomanaiden154)

Changes

This patch adds information on the new LLVM-EXEGESIS-SNIPPET-ADDRESS annotation and on the --benchmark-repeat-count flag.

---

Full diff: https://github.com/llvm/llvm-project/pull/75408.diff

1 Files Affected:

• (modified) llvm/docs/CommandGuide/llvm-exegesis.rst (+12)

diff --git a/llvm/docs/CommandGuide/llvm-exegesis.rst b/llvm/docs/CommandGuide/llvm-exegesis.rst
index 874bae82a1029a..a1c631e9687ba7 100644
--- a/llvm/docs/CommandGuide/llvm-exegesis.rst
+++ b/llvm/docs/CommandGuide/llvm-exegesis.rst
@@ -81,6 +81,12 @@ properly.
   definition should start at. Note that a single memory definition can be
   mapped multiple times. Using this annotation requires the subprocess
   execution mode.
+* `LLVM-EXEGESIS-SNIPPET-ADDRESS <address>` - This annotation allows for
+  setting the address where the beginning of the snippet to be executed will
+  be mapped in at. The address is given in hexadecimal. Note that the snippet
+  also includes setup code, so the instruction exactly at the specified
+  address will not be the first instruction in the snippet. Using this
+  annotation requires the subprocess execution mode.
 
 EXAMPLE 1: benchmarking instructions
 ------------------------------------
@@ -425,6 +431,12 @@ OPTIONS
   features such as memory annotations but is currently restricted to X86-64
   on Linux.
 
+.. option:: --benchmark-repeat-count=<repeat-count>
+
+  This option enables specifying the number of times to repeat the benchmark
+  when performing latency benchmarks. By default, llvm-exegesis will repeat
+  a latency measurement 30 times and then aggregate the results.
+
 EXIT STATUS
 -----------