------- Comment #13 from geoffk at geoffk dot org 2008-02-12 22:43 ------- Subject: Re: [4.3 Regression] gcc.c-torture/execute/va-arg-25.c:32: internal compiler error: in expand_call, at calls.c:2785
On 12/02/2008, at 7:46 AM, hjl dot tools at gmail dot com wrote: > ------- Comment #10 from hjl dot tools at gmail dot com 2008-02-12 > 15:46 ------- > (In reply to comment #3) >> Reproducible even with x86_64-linux -> i686-darwin9 cross, at -Os >> as well as >> -O2 -mno-accumulate-outgoing-args. The difference between i686- >> linux and >> i686-darwin9 that matters here is that darwin defines >> STACK_BOUNDARY to 128, >> while linux to 4. >> > > I think it is wrong to set STACK_BOUNDARY to 128 for 32bit since it is > hardware related, not ABI related. They should set > PREFERRED_STACK_BOUNDARY > instead, which is set to 128 already. On stack alignment branch, we > introduced a new macro, ABI_STACK_BOUNDARY, to handle different ABIs. If you do not align the stack at a 128-bit boundary, your program will crash. The hardware that it is related to is SSE2. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34621
