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Diffstat (limited to 'llvm/docs/Extensions.rst')
| -rw-r--r-- | llvm/docs/Extensions.rst | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/llvm/docs/Extensions.rst b/llvm/docs/Extensions.rst index ea267842cdc3..1ebea4a96eaa 100644 --- a/llvm/docs/Extensions.rst +++ b/llvm/docs/Extensions.rst @@ -535,6 +535,27 @@ Example of BBAddrMap with PGO data: .uleb128 1000 # BB_3 basic block frequency (only when enabled) .uleb128 0 # BB_3 successors count (only enabled with branch probabilities) +``SHT_LLVM_FUNC_MAP`` Section (function address map) +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +This section stores the mapping from the binary address of function to its +related metadata features. It is used to emit function-level analysis data and +can be enabled through ``--func-map`` option. The fields are encoded in the +following format: + +#. A version number byte used for backward compatibility. +#. The function's entry address. +#. Dynamic Instruction Count, which is calculated as the total PGO counts for all + instructions within the function. + +Example: + +.. code-block:: gas + + .section ".llvm_func_map","",@llvm_func_map + .byte 1 # version number + .quad .Lfunc_begin1 # function address + .uleb128 1000 # dynamic instruction count + ``SHT_LLVM_OFFLOADING`` Section (offloading data) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ This section stores the binary data used to perform offloading device linking @@ -725,4 +746,3 @@ follows: add x16, x16, :lo12:__chkstk blr x16 sub sp, sp, x15, lsl #4 - |