The reincarnation of PR15242

[Andrew Haley]

Ian Lance Taylor wrote:
> Andrew Haley <aph@redhat.com> writes:
> 
>> This seems to be an an old bug that has come back.  We're generating
>>
>> L1210:
>>         jmp     *%eax
>> .L4:
>> .L5:
>>         ...
>>         jmp     .L1210
>> .L1171:
>> .L1172:
>>         ...
>>         jmp     .L1210
>> .L1168:
>> .L1169:
>>         ...
>>         jmp     .L1210
>>
>>
>> instead of
>>
>> .L1210:
>>         jmp     *%eax
>> .L4:
>> .L5:
>>         ...
>>         jmp     *%eax
>> .L1171:
>> .L1172:
>>         ...
>>         jmp     *%eax
>> .L1168:
>> .L1169:
>>         ...
>>         jmp     *%eax
>>
>> Current gcc trunk, x86, gcc -O3 ef.i  -S -m32.
>>
>> Attachment in old Bugzilla entry at
>> http://gcc.gnu.org/bugzilla/attachment.cgi?id=6206&action=view
> 
> 
> We should have something like this in the testsuite.

I've been thinking about that.  How would one go about writing a testcase?
I guess we're looking for a lot of jmp instrs all bracnhing to the same
label.

Andrew.