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re PR tree-optimization/68823 ([graphite] tramp3d-v4 compiled with -floop-nest-optimize crashes) 

2017-09-15  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/68823
	* graphite-scop-detection.c (build_alias_set): If we have a
	possible dependence check whether we can handle them by just
	looking at the DRs DR_ACCESS_FNs.
	(build_scops): If build_alias_set fails, fail the SCOP.

From-SVN: r252780
This commit is contained in:
Richard Biener 2017-09-15 07:03:02 +00:00 committed by Richard Biener
parent 29d326425c
commit b6ab6ef81c
2 changed files with 28 additions and 2 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2017-09-15 Richard Biener <rguenther@suse.de>
PR tree-optimization/68823
* graphite-scop-detection.c (build_alias_set): If we have a
possible dependence check whether we can handle them by just
looking at the DRs DR_ACCESS_FNs.
(build_scops): If build_alias_set fails, fail the SCOP.
2017-09-14 Michael Meissner <meissner@linux.vnet.ibm.com>
* config/rs6000/rs6000-builtin.def (BU_FLOAT128_1_HW): New macros

22
gcc/graphite-scop-detection.c
View File

@ -1855,7 +1855,7 @@ try_generate_gimple_bb (scop_p scop, basic_block bb)
/* Compute alias-sets for all data references in DRS. */
static void
static bool
build_alias_set (scop_p scop)
{
int num_vertices = scop->drs.length ();
@ -1868,6 +1868,18 @@ build_alias_set (scop_p scop)
for (j = i+1; scop->drs.iterate (j, &dr2); j++)
if (dr_may_alias_p (dr1->dr, dr2->dr, true))
{
/* Dependences in the same alias set need to be handled
by just looking at DR_ACCESS_FNs. */
if (DR_NUM_DIMENSIONS (dr1->dr) != DR_NUM_DIMENSIONS (dr2->dr)
|| ! operand_equal_p (DR_BASE_OBJECT (dr1->dr),
DR_BASE_OBJECT (dr2->dr),
OEP_ADDRESS_OF)
|| ! types_compatible_p (TREE_TYPE (DR_BASE_OBJECT (dr1->dr)),
TREE_TYPE (DR_BASE_OBJECT (dr2->dr))))
{
free_graph (g);
return false;
}
add_edge (g, i, j);
add_edge (g, j, i);
}
@ -1883,6 +1895,7 @@ build_alias_set (scop_p scop)
scop->drs[i].alias_set = g->vertices[i].component + 1;
free_graph (g);
return true;
}
/* Gather BBs and conditions for a SCOP. */
@ -2075,7 +2088,12 @@ build_scops (vec<scop_p> *scops)
scop->pbbs.qsort (cmp_pbbs);
order.release ();
build_alias_set (scop);
if (! build_alias_set (scop))
{
DEBUG_PRINT (dp << "[scop-detection-fail] cannot handle dependences\n");
free_scop (scop);
continue;
}
/* Do not optimize a scop containing only PBBs that do not belong
to any loops. */