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| author | Dimitry Andric <dim@FreeBSD.org> | 2017-06-16 21:03:24 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2017-06-16 21:03:24 +0000 |
| commit | 7c7aba6e5fef47a01a136be655b0a92cfd7090f6 (patch) | |
| tree | 99ec531924f6078534b100ab9d7696abce848099 /docs/BranchWeightMetadata.rst | |
| parent | 7ab83427af0f77b59941ceba41d509d7d097b065 (diff) | |
Vendor import of llvm trunk r305575:vendor/llvm/llvm-trunk-r305575
Notes
svn path=/vendor/llvm/dist/; revision=320013
svn path=/vendor/llvm/llvm-trunk-r305575/; revision=320014; tag=vendor/llvm/llvm-trunk-r305575
Diffstat (limited to 'docs/BranchWeightMetadata.rst')
| -rw-r--r-- | docs/BranchWeightMetadata.rst | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/docs/BranchWeightMetadata.rst b/docs/BranchWeightMetadata.rst index b941d0d15050..9bd8bd4ae744 100644 --- a/docs/BranchWeightMetadata.rst +++ b/docs/BranchWeightMetadata.rst @@ -64,6 +64,20 @@ Branch weights are assigned to every destination. [ , i32 <LABEL_BRANCH_WEIGHT> ... ] } +``CallInst`` +^^^^^^^^^^^^^^^^^^ + +Calls may have branch weight metadata, containing the execution count of +the call. It is currently used in SamplePGO mode only, to augment the +block and entry counts which may not be accurate with sampling. + +.. code-block:: none + + !0 = metadata !{ + metadata !"branch_weights", + i32 <CALL_BRANCH_WEIGHT> + } + Other ^^^^^ |