[AutoFDO] Fix get_original_name to strip only names that are generated after auto-profile

Mon, 16 Jun 2025 17:47:10 -0700 

Hi,
As discusses earlier, get_original_name is used to match profile binary names to
the symbol names in the IR during auto-profile pass.

Hence, we want to strip the compiler added suffixes for names
that are generated after auto-profile pass.

Names we should strip:
* SRA clones (of the form foo.isra.0)
* IPA-CP clonse (in the form bar.constprop.123)
* Partial inlining clones (foo.part.0, foo.cold)
* lto_priv.0
* Nested function as foo.part.0

Others that should not be stripped:
* target_clones (foo.arch_x86_64_v2, foo.avx2)
* OpenMP related suffixes (.omp_fn.N, .omp_cpyfn.N)

Tested by running autoprofiledbootstrap and tree-prof check that
exercises auto-profile pass.

gcc/ChangeLog:

        * auto-profile.cc (isAsciiDigit): New.
        (get_original_name): Strip suffixes only for compiler generated
        names tat happens after auto-profile.

Thanks,
Kugan

Attachment: 0001-AutoFDO-Fix-get_original_name-to-strip-only-names-th.patch
Description: 0001-AutoFDO-Fix-get_original_name-to-strip-only-names-th.patch

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