ir3: Support addr0 align of 8

At this point it isn't actually an alignment, but we need to multiply by
8 now because there are 2 vec4's per view for FDM driver params.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38451>

src/freedreno/ir3/ir3_context.c

@@ -374,6 +374,11 @@ create_addr0(struct ir3_builder *build, struct ir3_instruction *src, int align)
       immed = create_immed_typed_shared(build, 2, TYPE_S16, shared);
       instr = ir3_SHL_B(build, instr, 0, immed, 0);
       break;
+   case 8:
+      /* src *= 8 => src <<= 3: */
+      immed = create_immed_typed_shared(build, 3, TYPE_S16, shared);
+      instr = ir3_SHL_B(build, instr, 0, immed, 0);
+      break;
    default:
       UNREACHABLE("bad align");
       return NULL;

src/freedreno/ir3/ir3_context.h

@@ -104,7 +104,7 @@ struct ir3_context {
     * src used for an array of vec1 cannot be also used for an
     * array of vec4.
     */
-   struct hash_table *addr0_ht[4];
+   struct hash_table *addr0_ht[8];
 
    struct hash_table *sel_cond_conversions;
    struct hash_table *predicate_conversions;