[Bug target/78056] [7 Regression] build failure on Power7

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78056

--- Comment #14 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I used the following patch yesterday, and it works.  Totally
hacky of course, it should be factored to its own function, etc.

===
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 654206f..667c169 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -17509,6 +17509,8 @@ altivec_init_builtins (void)
     def_builtin (d->name, void_ftype_pcvoid_int_int, d->code);

   /* Initialize the predicates.  */
+if (TARGET_P9_VECTOR)
+{
   d = bdesc_altivec_preds;
   for (i = 0; i < ARRAY_SIZE (bdesc_altivec_preds); i++, d++)
     {
@@ -17549,6 +17551,7 @@ altivec_init_builtins (void)

       def_builtin (d->name, type, d->code);
     }
+}

   /* Initialize the abs* operators.  */
   d = bdesc_abs;
===