http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47037
Changpeng Fang <changpeng.fang at amd dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|465.tonto Segmentation |465.tonto Segmentation
|Fault in memset |Fault in memset with
| |-fcaller-saves (default at
| |-O2 or higher)
--- Comment #3 from Changpeng Fang <changpeng.fang at amd dot com> 2010-12-23
18:05:02 UTC ---
.LBB633:
.loc 1 967 0 discriminator 2
movq %r13, %rdx
movq %rbx, %rsi
movq %rsp, %rdi
call memcpy
movl $128, %edx
leaq (%rsp,%r13), %rdi ## <---- bad address
movl $32, %esi
subq %r13, %rdx
movq %rsp, %r12
call memset
jmp .L707
.LVL646:
.p2align 4,,10
.p2align 3
Actually, the segfault is in copying label to symbol at line 967:
character(128) :: symbol
symbol = label(1:lensym)
The memset is to set the remainder of the 128 bytes to ZEROs. The local code
seems
good to me. It might be that the %rsp is not appropriately set. Anyway, it is
not likely to be a fortran bug because it only occurs at -O2 or higher when
-fcaller-saves is turned on,
