PATCH: Properly check the end of basic block

[Richard Sandiford]

Steven Bosscher <stevenb.gcc@gmail.com> writes:
>> Index: passes.c
>> ===================================================================
>> --- passes.c	(revision 166920)
>> +++ passes.c	(working copy)
>> @@ -1051,8 +1051,8 @@ init_optimization_passes (void)
>>  	  NEXT_PASS (pass_compute_alignments);
>>  	  NEXT_PASS (pass_duplicate_computed_gotos);
>>  	  NEXT_PASS (pass_variable_tracking);
>> -	  NEXT_PASS (pass_free_cfg);
>>  	  NEXT_PASS (pass_machine_reorg);
>> +	  NEXT_PASS (pass_free_cfg);
>>  	  NEXT_PASS (pass_cleanup_barriers);
>>  	  NEXT_PASS (pass_delay_slots);
>>  	  NEXT_PASS (pass_split_for_shorten_branches);
>
> This breaks at least all targets that run delay slot scheduling during
> machine-reorg (MIPS), targets that layout constant pools (SH,ARM),
> targets that recompute the CFG in their machine-reorg (blackfin, ia64,
> MIPS (?!)).

Just out of curiosity, why the (?!) ?  We need dataflow info when
working around an r10k speculative execution errata and when relaxing
PIC calls.  We free it again before doing DBR, like you say.

Richard