Re: PATCH [10/n] X32: Support x32 LEA insns

["H.J. Lu" <hjl dot tools at gmail dot com>]

On Sat, Jul 23, 2011 at 2:38 AM, Uros Bizjak <ubizjak@gmail.com> wrote:
> On Fri, Jul 22, 2011 at 9:03 PM, H.J. Lu <hongjiu.lu@intel.com> wrote:
>
>> This patch adds x32 LEA insn support. ?The main issue is
>>
>> gen_lowpart (Pmode, operands[1]);
>>
>> doesn't work on symbol. ?This patch avoids it.
>>
>> Also we shouldn't generate 32bit store with x32 PIC source.
>>
>> Any comments?
>
> Can you please post some testcases to see the effect of the patch?
>
> Thanks,
> Uros.
>

Please see testcases in

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47381

For example:

[hjl@gnu-6 pr47381]$ cat y.i
typedef unsigned long ulg;
long block_start;
typedef unsigned char uch;
extern uch window[];
 unsigned strstart;
ulg flush_block (char *buf, ulg stored_len, int eof);
ulg deflate()
{
    return flush_block(block_start >= 0L ?
(char*)&window[(unsigned)block_start] : (char*)((void *)0),
(long)strstart - block_start, (1));
}
[hjl@gnu-6 pr47381]$ make y.s
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -S -o y.s -mx32 -O2
y.i
y.i: In function \u2018deflate\u2019:
y.i:10:1: internal compiler error: in gen_lowpart_general, at rtlhooks.c:59
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [y.s] Error 1
[hjl@gnu-6 pr47381]$


-- 
H.J.