[PATCH 2/3] testsuite: Require 128-bit vectors for bb-slp-pr95839.c

["Maciej W. Rozycki" <macro@embecosm.com>]

The bb-slp-pr95839.c test assumes quad-single float vector support, but 
some targets only support pairs of floats, causing this test to fail 
with such targets.  Limit this test to targets that support at least 
128-bit vectors then, and add a complementing test that can be run with 
targets that have support for 64-bit vectors only.  There is no need to 
adjust bb-slp-pr95839-2.c as 128 bits are needed even for the smallest 
vector of doubles, so support is implied by the presence of vectors of 
doubles.

	gcc/testsuite/
	* gcc.dg/vect/bb-slp-pr95839.c: Limit to `vect128' targets.
	* gcc.dg/vect/bb-slp-pr95839-v8.c: New test.
---
 gcc/testsuite/gcc.dg/vect/bb-slp-pr95839-v8.c |   14 ++++++++++++++
 gcc/testsuite/gcc.dg/vect/bb-slp-pr95839.c    |    1 +
 2 files changed, 15 insertions(+)

gcc-test-bb-slp-pr95839-vect128.diff
Index: gcc/gcc/testsuite/gcc.dg/vect/bb-slp-pr95839-v8.c
===================================================================
--- /dev/null
+++ gcc/gcc/testsuite/gcc.dg/vect/bb-slp-pr95839-v8.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target vect_float } */
+/* { dg-require-effective-target vect64 } */
+/* { dg-additional-options "-w -Wno-psabi" } */
+
+typedef float __attribute__((vector_size(8))) v2f32;
+
+v2f32 f(v2f32 a, v2f32 b)
+{
+  /* Check that we vectorize this CTOR without any loads.  */
+  return (v2f32){a[0] + b[0], a[1] + b[1]};
+}
+
+/* { dg-final { scan-tree-dump "optimized: basic block" "slp2" } } */
Index: gcc/gcc/testsuite/gcc.dg/vect/bb-slp-pr95839.c
===================================================================
--- gcc.orig/gcc/testsuite/gcc.dg/vect/bb-slp-pr95839.c
+++ gcc/gcc/testsuite/gcc.dg/vect/bb-slp-pr95839.c
@@ -1,5 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target vect_float } */
+/* { dg-require-effective-target vect128 } */
 /* { dg-additional-options "-w -Wno-psabi" } */
 
 typedef float __attribute__((vector_size(16))) v4f32;