The following fixes an ICE I introduced in the x86 backend by not
considering word_mode vectorization.
Bootstrap & regtest running on x86_64-unknown-linux-gnu, will apply
after that succeeded.
Richard.
2018-10-19 Richard Biener <rguent...@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.
Index: gcc/config/i386/i386.c
===================================================================
--- gcc/config/i386/i386.c (revision 265312)
+++ gcc/config/i386/i386.c (working copy)
@@ -45173,9 +45173,8 @@ ix86_builtin_vectorization_cost (enum ve
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);
Index: gcc/testsuite/gcc.target/i386/pr87657.c
===================================================================
--- gcc/testsuite/gcc.target/i386/pr87657.c (nonexistent)
+++ gcc/testsuite/gcc.target/i386/pr87657.c (working copy)
@@ -0,0 +1,22 @@
+/* { 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
