[msan] Eliminate non-deterministic behavior in the pass (#89831)

Almost NFC, instrumentation is as correct as it was before.

We need InstrumentationList grouped by origin instruction,
so we used stable_sort. However these objects already grouped
because we never interleave sequences of `insertShadowCheck`
of different instrunction.

Pointer sort has artifact that it was deppendent on allocator behavior,
so we could inserted checks in a different order.

There is no test, as I failed to reproduce this with `opt`. My guess
is that for reproducer we need to increase fragmentation in the
allocator.

0 files changed, 0 insertions, 0 deletions