tree 82e3bd66424e330b147610c2437ca94a49217f1e
parent 2d5d898f3673a2048c1fd68a4b9221b4be9c68b0
author Milad Fa <46688537+miladfarca@users.noreply.github.com> 1784583224 -0700
committer Copybara-Service <copybara-worker@google.com> 1784583267 -0700

PR #2120: Fix hash_instantiated_test and hash_test on big-endian

Imported from GitHub PR https://github.com/abseil/abseil-cpp/pull/2120

The two tests are failing on big-endian platforms after 63c77e406.

The new bit-packing code stores packed bits in the LSB of a uint64_t, then feeds raw bytes via reinterpret_cast. On big-endian, the LSB is at the end of the memory layout, so the partial-word path reads leading zero bytes instead of the actual data, causing hash collisions between distinct inputs.

Fix by byte-swapping the word to little-endian layout before feeding it to the combiner.
Merge 955225b59105b384641beee9e00c25c07b80ce7e into 3d9e6767fb5483e70fb7262e4e5dd449fae59a66

Merging this change closes #2120

COPYBARA_INTEGRATE_REVIEW=https://github.com/abseil/abseil-cpp/pull/2120 from miladfarca:63c77e406-fix 955225b59105b384641beee9e00c25c07b80ce7e
PiperOrigin-RevId: 951057598
Change-Id: I8f16de470641d2cb846806ff887cf955504735fd