PR tree-optimization/56812
* tree-vect-data-refs.c (vect_slp_analyze_data_ref_dependence):
DRs of the same interleaving chain are independent.
* g++.dg/vect/slp-pr56812.cc: New testcase.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@197390
138bc75d-0d04-0410-961f-
82ee72b054a4
+2013-04-03 Richard Biener <rguenther@suse.de>
+
+ PR tree-optimization/56812
+ * tree-vect-data-refs.c (vect_slp_analyze_data_ref_dependence):
+ DRs of the same interleaving chain are independent.
+
2013-04-02 Jason Merrill <jason@redhat.com>
* gdbinit.in (pbb): Use debug fn.
+2013-04-03 Richard Biener <rguenther@suse.de>
+
+ PR tree-optimization/56812
+ * g++.dg/vect/slp-pr56812.cc: New testcase.
+
2013-04-03 Janus Weil <janus@gcc.gnu.org>
PR fortran/56284
--- /dev/null
+/* { dg-do compile } */\r
+/* { dg-require-effective-target vect_float } */\r
+/* { dg-options "-O3 -funroll-loops -fdump-tree-slp-details" } */\r
+\r
+class mydata {\r
+public:\r
+ mydata() {Set(-1.0);}\r
+ void Set (float);\r
+ static int upper() {return 8;}\r
+ float data[8];\r
+};\r
+\r
+void mydata::Set (float x)\r
+{\r
+ for (int i=0; i<upper(); i++)\r
+ data[i] = x;\r
+}\r
+\r
+/* { dg-final { scan-tree-dump-times "basic block vectorized using SLP" 1 "slp" } } */\r
+/* { dg-final { cleanup-tree-dump "slp" } } */\r
if (DR_IS_READ (dra) && DR_IS_READ (drb))
return false;
+ /* If dra and drb are part of the same interleaving chain consider
+ them independent. */
+ if (STMT_VINFO_GROUPED_ACCESS (vinfo_for_stmt (DR_STMT (dra)))
+ && (GROUP_FIRST_ELEMENT (vinfo_for_stmt (DR_STMT (dra)))
+ == GROUP_FIRST_ELEMENT (vinfo_for_stmt (DR_STMT (drb)))))
+ return false;
+
/* Unknown data dependence. */
if (DDR_ARE_DEPENDENT (ddr) == chrec_dont_know)
{