On Sat, 2007-10-06 at 19:48 -0700, Gary Funck wrote: > While working on UPC, we ran into an interesting problem > where if -O1 is enabled, and -funit-at-a-time is disabled > (which is not the default configuration) a static variable > declaration was not emitted by the assembler. I haven't > quite worked out why this is the case, but reading the > code did notice some awkwardness in how "used" variables > are detected and handled by the call graph (cgraph) pass(es).
> All of this is somewhat specific to UPC's use of the gimplify > pass to implement language semantics and the particular nature > of the code it generates. However, I think the general > observation of the way that the "used" attribute is queried > directly, and how it interacts with the presence/absence > of flag_unit_at_a_time might be worth some level of review > and possible rework. Might this be related to http://gcc.gnu.org/PR33645? Janis
