* graphite-scop-detection.c (build_scops): Do not handle scops with more
than PARAM_GRAPHITE_MAX_ARRAYS_PER_SCOP arrays.
* params.def (PARAM_GRAPHITE_MAX_ARRAYS_PER_SCOP): New.
---
gcc/graphite-scop-detection.c | 11 +++++++++++
gcc/params.def | 7 +++++++
2 files changed, 18 insertions(+)
diff --git a/gcc/graphite-scop-detection.c b/gcc/graphite-scop-detection.c
index 6c0987d..f425f01 100644
--- a/gcc/graphite-scop-detection.c
+++ b/gcc/graphite-scop-detection.c
@@ -1777,6 +1777,17 @@ build_scops (vec<scop_p> *scops)
continue;
}
+ unsigned max_arrays = PARAM_VALUE (PARAM_GRAPHITE_MAX_ARRAYS_PER_SCOP);
+ if (scop->drs.length () >= max_arrays)
+ {
+ DEBUG_PRINT (dp << "[scop-detection-fail] too many data references: "
+ << scop->drs.length ()
+ << " is larger than --param
graphite-max-arrays-per-scop="
+ << max_arrays << ".\n");
+ free_scop (scop);
+ continue;
+ }
+
build_sese_loop_nests (scop->region);
find_scop_parameters (scop);
diff --git a/gcc/params.def b/gcc/params.def
index dd07301..2df47d7 100644
--- a/gcc/params.def
+++ b/gcc/params.def
@@ -849,6 +849,13 @@ DEFPARAM (PARAM_GRAPHITE_MAX_BBS_PER_FUNCTION,
"maximum number of basic blocks per function to be analyzed by
Graphite",
100, 0, 0)
+/* Maximal number of array references in a scop. */
+
+DEFPARAM (PARAM_GRAPHITE_MAX_ARRAYS_PER_SCOP,
+ "graphite-max-arrays-per-scop",
+ "maximum number of arrays per scop",
+ 100, 0, 0)
+
/* Maximal number of basic blocks in the functions analyzed by Graphite. */
DEFPARAM (PARAM_GRAPHITE_MIN_LOOPS_PER_FUNCTION,
--
1.9.1
