[Bug c++/35159] g++ inoperable with no error message

[ktietz at gcc dot gnu dot org]

------- Comment #6 from ktietz at gcc dot gnu dot org  2008-02-14 09:07 -------
Hello,

I tracked the problems down. Stack probing in builtin_alloca is the reason for
this. As I found, in some cases the input %rax argument isn't got set at all or
got clobbered before call to __chkstk.
The work-a-round for this, is to disable stack probing. So I assume the reason
is to be searched in optimization or in the builtin function itself.
AFAICS the implementation in the i386.md file seems to be ok.

Cheers, Kai


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35159