[issue20162] Test test_hash_distribution fails on RHEL 6.5 / ppc64

[Yury V. Zaytsev]

Yury V. Zaytsev added the comment:

Hi David,

It's gcc from RHEL 6.5 gcc-4.4.7-4.el6.ppc64, the flags are "-DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes" vs. "-DNDEBUG -g -fwrapv -O1 -Wall -Wstrict-prototypes".

The problem is, I can't isolate it. We honestly tried it with Victor, but gcc doesn't want to miscompile a trivial example.

You can see in the attachment as far as I could get: I wrapped the macro in a function, so that it doesn't inline and compared the assembly of the good and bad object files.

Hope that helps!

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