[AutoFDO] Propagate single succ/pred block's annotation

Tue, 22 Jul 2025 02:09:34 -0700 

Hi,

In afdo_propagate_edge, annotate edge from the connected
basic_block if they have single predcessor/succcessor.

Tested with spec2017 intrate/intspeed and shows slight improvement.

gcc/ChangeLog:

2025-07-21  Kugan Vivekanandarajah  <kvivekana...@nvidia.com>

        * auto-profile.cc (afdo_propagate_edge): Propagate single
        succ or pred block's annotation.

Is this OK?

Thanks,
Kugan

Attachment: 0001-AutoFDO-Propagate-single-succ-pred-block-s-annotatio.patch
Description: 0001-AutoFDO-Propagate-single-succ-pred-block-s-annotatio.patch

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