re PR tree-optimization/87657 (SLP ICE in libgfortran matmul_i2_vanilla)

2018-10-19  Richard Biener  <rguenther@suse.de>

	PR target/87657
	* config/i386/i386.c (ix86_builtin_vectorization_cost): Use
	TYPE_VECTOR_SUBPARTS and avoid relying on vector mode.

	* gcc.target/i386/pr87657.c: New testcase.

From-SVN: r265316

gcc/ChangeLog

+2018-10-19  Richard Biener  <rguenther@suse.de>
+
+	PR target/87657
+	* config/i386/i386.c (ix86_builtin_vectorization_cost): Use
+	TYPE_VECTOR_SUBPARTS and avoid relying on vector mode.
+
 2018-10-19  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/72782

gcc/config/i386/i386.c

@@ -45173,9 +45173,8 @@ ix86_builtin_vectorization_cost (enum vect_cost_for_stmt type_of_cost,
 
       case vec_construct:
 	{
-	  gcc_assert (VECTOR_MODE_P (mode));
 	  /* N element inserts into SSE vectors.  */
-	  int cost = GET_MODE_NUNITS (mode) * ix86_cost->sse_op;
+	  int cost = TYPE_VECTOR_SUBPARTS (vectype) * ix86_cost->sse_op;
 	  /* One vinserti128 for combining two SSE vectors for AVX256.  */
 	  if (GET_MODE_BITSIZE (mode) == 256)
 	    cost += ix86_vec_cost (mode, ix86_cost->addss);

gcc/testsuite/ChangeLog

+2018-10-19  Richard Biener  <rguenther@suse.de>
+
+	PR target/87657
+	* gcc.target/i386/pr87657.c: New testcase.
+
 2018-10-19  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/72782

gcc/testsuite/gcc.target/i386/pr87657.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-slp-vectorize -fno-vect-cost-model -mno-sse" } */
+
+int x;
+
+void foo (short a, short b)
+{
+  ((short *)&x)[0] = a;
+  ((short *)&x)[1] = b;
+}
+
+#if __SIZEOF_LONG__ == 8
+long y;
+
+void bar (short a, short b)
+{
+  ((short *)&y)[0] = a;
+  ((short *)&y)[1] = b;
+  ((short *)&y)[2] = a;
+  ((short *)&y)[3] = b;
+}
+#endif