------- Comment #3 from danglin at gcc dot gnu dot org 2006-09-17 20:05 -------
There's a question in my mind as to whether we should always be
emitting a library call:
/* When not optimizing, generate calls to library functions for a certain
set of builtins. */
if (!optimize
&& !called_as_built_in (fndecl)
&& DECL_ASSEMBLER_NAME_SET_P (fndecl)
&& fcode != BUILT_IN_ALLOCA)
return expand_call (exp, target, ignore);
The setting of DECL_ASSEMBLER_NAME doesn't seem to be entirely reliable.
We have in builtin_function:
if (library_name)
SET_DECL_ASSEMBLER_NAME (decl, get_identifier (library_name));
library_name is set for __builtin_memcpy but not for memcpy.
The difference in behavior between the 32-bit hpux targets and the
32-bit linux target arises because the hpux target defines ASM_OUTPUT_EXTERNAL.
So, the assembler name for memcpy gets set indirectly by assemble_external_real
and this causes expand_builtin to use the library routine. Is this the
intended behavior?
Ok, back to looking at the linux SEGV.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29111
