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Anthony, H.J. Lu,
Thanks, it was indeed a memory corruption. Not DIMM, but simply an
effect of the patch I made. The origin of the problem is not very
clear though:
- --- a/gcc-snapshot/lto-plugin/lto-plugin.c 2015-10-02
01:59:07.000000000 +0400
+++ b/gcc-snapshot/lto-plugin/lto-plugin.c 2015-10-02
02:09:17.000000000 +0400
@@ -591,7 +591,7 @@
all_symbols_read_handler (void)
{
unsigned i;
- - unsigned num_lto_args = num_claimed_files + lto_wrapper_num_args + 1;
+ unsigned num_lto_args = num_claimed_files + 2;
char **lto_argv;
const char **lto_arg_ptr;
if (num_claimed_files == 0)
@@ -611,8 +611,8 @@
free_1 ();
- - for (i = 0; i < lto_wrapper_num_args; i++)
- - *lto_arg_ptr++ = lto_wrapper_argv[i];
+ if (lto_wrapper_num_args > 0)
+ *lto_arg_ptr++ = lto_wrapper_argv[0];
for (i = 0; i < num_claimed_files; i++)
{
GCC compiled with this change is used to recompile GCC itself. LTO is
not used, so I did not expect any problem. However, GCC built with
this change randomly segfaults or corrupts the output assembly files.
- - D.
On 07/04/2013 06:31 AM, Anthony Foiani wrote:
> Dmitry Mikushin <dmi...@kernelgen.org> writes:
>
>> Error: no such instruction: `eovq -32(%rbp),%rdx'
>
> That's only a one-bit error away from "movq ..."
>
> ('m' = 0x6d = 0b 0110 1101, 'e' = 0x65 = 0b 0110 0101)
>
> Maybe run memory tester overnight?
>
> (This is from personal experience -- I had a bad stick of RAM that
> caused all sorts of bizarre compile problems. I eventually
> isolated the problem and replaced the DIMM; the compile problems
> went away.)
>
> Good luck!
>
> Best regards, Anthony Foiani
>
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