Hi Wilco,

Wilco Dijkstra <wilco.dijks...@arm.com> wrote:

>> Testsuite fails are order “a few hundred” mostly seem to be related to 
>> tree-prof
>> and vector tests (plus the anticipated scan-asm stuff, where code-gen will 
>> have
>> changed).  I don’t have cycles to analyse the causes right now - but that 
>> gives
>> an idea.
> 
> Are those tests specific to Power? I got 14 failures in total across the full
> C and C++ test suites. Note it's easy to update the default options for a
> specific test directory if needed.

No, the test was on x86_64-darwin16 (m32/m64)  and a very rough estimate of the 
number of fails (but definitely in the hundreds, not tens) - I haven’t tried 
the same on
PPC; the h/w is tied up with gcc-7 backport testing.

the change for *-*-darwin* will be that the ABI mandates common items to be 
indirected, thus defaulting to no-common will have the effect of changing the
generated code - and it’s a fairly common pattern in the testsuite to have 
uninit globals.

 * I’d expect broken scan-asms (probably not difficult to fix, just tedious).
 * not sure why it seems to have a particularly adverse effect on the tree-prof 
stuff.

short on cycles in the run up to stage #1 end + gcc-7 release .. but will try 
to 
poke at it over the next few days.

cheers
Iain

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