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[Clang][PGO][UserManual] Specify usage of -b flag #139763

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madhur13490 merged 1 commit into from
May 14, 2025
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[Clang][PGO][UserManual] Specify usage of -b flag #139763

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3 changes: 3 additions & 0 deletions clang/docs/UsersManual.rst
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Expand Up @@ -2792,6 +2792,9 @@ usual build cycle when using sample profilers for optimization:

$ llvm-profgen --binary=./code --output=code.prof --perfdata=perf.data

Please note, ``perf.data`` must be collected with ``-b`` flag to Linux ``perf``
for the above step to work.

When using SEP the output is in the textual format corresponding to
``llvm-profgen --perfscript``. For example:

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