------- Comment #36 from dave at hiauly1 dot hia dot nrc dot ca 2007-12-11 21:44 ------- Subject: Re: [4.3 Regression] 25_algorithms/search_n/iterator.cc: miscompiled on hppa2.0w-hp-hpux11.11
> 2) the instruction to load lo_sum of the address has not been dropped, I > posted > only part of the function's assembly. The bug is that dbr decides to put > ldil LR'L$C0002,%r28 instruction from branch target (L$0026) into a delay > slot > even when %r28 is in fact live (passed from caller, unmodified to foo1) > > I guess we need to ensure somehow that df knows struct_value_rtx regs are live > at the beginning of function for functions that return struct. I guess dbr must find a REG_DEAD note for %r28. Dave -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32636
