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tree-vect-data-refs.c (vect_analyze_data_ref_dependences): Assert compute_all_dependences succeeds.

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2018-06-29  Richard Biener  <rguenther@suse.de>

	* tree-vect-data-refs.c (vect_analyze_data_ref_dependences): Assert
	compute_all_dependences succeeds.
	* tree-vect-loop.c (vect_get_datarefs_in_loop): Fail early if we
	exceed --param loop-max-datarefs-for-datadeps.

From-SVN: r262244
This commit is contained in:
Richard Biener 2018-06-29 09:49:14 +00:00 • committed by Richard Biener
parent 135101526e
commit c2fd033cdf
3 changed files with 17 additions and 4 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2018-06-29 Richard Biener <rguenther@suse.de>
* tree-vect-data-refs.c (vect_analyze_data_ref_dependences): Assert
compute_all_dependences succeeds.
* tree-vect-loop.c (vect_get_datarefs_in_loop): Fail early if we
exceed --param loop-max-datarefs-for-datadeps.
2018-06-29 Jakub Jelinek <jakub@redhat.com>
* config/rs6000/t-rs6000: Append rs6000-modes.h to TM_H.

9
gcc/tree-vect-data-refs.c
View file

@ -575,10 +575,11 @@ vect_analyze_data_ref_dependences (loop_vec_info loop_vinfo,
* LOOP_VINFO_DATAREFS (loop_vinfo).length ());
/* We need read-read dependences to compute
STMT_VINFO_SAME_ALIGN_REFS. */
if (!compute_all_dependences (LOOP_VINFO_DATAREFS (loop_vinfo),
&LOOP_VINFO_DDRS (loop_vinfo),
LOOP_VINFO_LOOP_NEST (loop_vinfo), true))
return false;
bool res = compute_all_dependences (LOOP_VINFO_DATAREFS (loop_vinfo),
&LOOP_VINFO_DDRS (loop_vinfo),
LOOP_VINFO_LOOP_NEST (loop_vinfo),
true);
gcc_assert (res);
}
LOOP_VINFO_NO_DATA_DEPENDENCIES (loop_vinfo) = true;

5
gcc/tree-vect-loop.c
View file

@ -1812,6 +1812,11 @@ vect_get_datarefs_in_loop (loop_p loop, basic_block *bbs,
}
return false;
}
/* If dependence analysis will give up due to the limit on the
number of datarefs stop here and fail fatally. */
if (datarefs->length ()
> (unsigned)PARAM_VALUE (PARAM_LOOP_MAX_DATAREFS_FOR_DATADEPS))
return false;
}
return true;
}