https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91892
Bug ID: 91892
Summary: [5.x,6.x ARM] Having a global pair<double, double>
causes code gen bug for init list of pair<double,
double>
Product: gcc
Version: 6.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dascandy at gmail dot com
Target Milestone: ---
https://godbolt.org/z/Q3BQRS
Code that sees the global first generates 16-byte aligned register allocation
for loading an initializer_list. Code that does not see the global first
generates 8-byte aligned register allocation for the same initializer_list. Net
result is that the pair is stored in r1/r2 (left tab) and loaded from r2/r3
(right tab).
Confirmed working normally on 7.x+. Generates an ABI warning on 6.x, but also
generates broken code. The warning might be this problem, but in that case I'd
expect the other half to compile at least in the same way.
