fold-vec-ld-misc.c: New.

[gcc/testsuite]

2017-09-19  Will Schmidt  <will_schmidt@vnet.ibm.com>

        * gcc.target/powerpc/fold-vec-ld-misc.c: New.

From-SVN: r252974

gcc/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+2017-09-19  Will Schmidt  <will_schmidt@vnet.ibm.com>
+
+	* gcc.target/powerpc/fold-vec-ld-misc.c: New.
+
 2017-09-19  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/82244

gcc/testsuite/gcc.target/powerpc/fold-vec-ld-misc.c

@@ -0,0 +1,54 @@
+/* Verify that overloaded built-ins for vec_ld with
+   structure pointer / double inputs produce the right code.  */
+
+/* This test is to ensure that when a cast is associated with arg1 on a
+   call to vec_ld (arg0, arg1), that the arg1 type is properly handled
+   through the gimple folding code.
+   We want something like this:
+	D.2736 = MEM[(voidD.44 *)D.2739];
+   We specifically do not want 'struct S' showing up:
+	D.3212 = MEM[(struct S *)D.3215];
+*/
+
+/* { dg-do compile { target lp64 } } */
+/* { dg-require-effective-target powerpc_vsx_ok } */
+/* { dg-options "-mvsx -O2 -fdump-tree-gimple" } */
+
+#include <altivec.h>
+#include <stdio.h>
+
+struct S {
+  vector int *i1,*i2;
+  vector long long *ll1;
+  vector double *vd1;
+  vector double *vd2;
+  vector double *vd3;
+  vector double *vd4;
+};
+
+vector double
+testld_struct1 (long long ll1, struct S *p)
+{
+  return __builtin_altivec_lvx_v2df (ll1, (double *)p);
+}
+
+vector double
+testld_struct1b (long long ll1, struct S *p)
+{
+  return vec_ld (ll1, (vector double *)p);
+}
+
+vector double
+testld_struct2 (struct S *p)
+{
+  return vec_ld (16, (vector double *)p);
+}
+
+vector double
+testld_struct3 (struct S *p)
+{
+  return vec_ld (16, (vector double *)p->vd2);
+}
+
+// We do not want the "struct S" reference to show up.
+/* { dg-final { scan-tree-dump-times "MEM\[\(struct S *\)D.\[0-9\]+\]" 0 "gimple" } } */