[gcc(refs/users/wschmidt/heads/builtins8)] rs6000: Write output to the builtins init file, part 2 of 3

[William Schmidt]

https://gcc.gnu.org/g:998b5aa6e3f1ea7bf4fed9539bfccc33b34da3f5

commit 998b5aa6e3f1ea7bf4fed9539bfccc33b34da3f5
Author: Bill Schmidt <wschmidt@linux.ibm.com>
Date:   Wed Mar 3 17:11:00 2021 -0600

    rs6000: Write output to the builtins init file, part 2 of 3
    
    2021-03-03  Bill Schmidt  <wschmidt@linux.ibm.com>
    
    gcc/
            * config/rs6000/rs6000-gen-builtins.c (write_init_bif_table):
            Implement.

Diff:
---
 gcc/config/rs6000/rs6000-gen-builtins.c | 71 +++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/gcc/config/rs6000/rs6000-gen-builtins.c b/gcc/config/rs6000/rs6000-gen-builtins.c
index 356746362bc..223026b36d7 100644
--- a/gcc/config/rs6000/rs6000-gen-builtins.c
+++ b/gcc/config/rs6000/rs6000-gen-builtins.c
@@ -2258,6 +2258,77 @@ write_header_file ()
 static void
 write_init_bif_table ()
 {
+  for (int i = 0; i <= curr_bif; i++)
+    {
+      fprintf (init_file,
+	       "  rs6000_builtin_info_x[RS6000_BIF_%s].fntype"
+	       "\n    = %s;\n",
+	       bifs[i].idname, bifs[i].fndecl);
+
+      /* Check whether we have a "tf" token in this string, representing
+	 a float128_type_node.  It's possible that float128_type_node is
+	 undefined (occurs for -maltivec -mno-vsx, for example), so we
+	 must guard against that.  */
+      int tf_found = strstr (bifs[i].fndecl, "tf") != NULL;
+
+      fprintf (init_file,
+	       "  if (new_builtins_are_live)\n");
+      fprintf (init_file, "    {\n");
+
+      if (tf_found)
+	{
+	  fprintf (init_file, "      if (float128_type_node)\n");
+	  fprintf (init_file, "        {\n");
+	}
+
+      fprintf (init_file,
+	       "      rs6000_builtin_decls_x[(int)RS6000_BIF_%s] = t\n",
+	       bifs[i].idname);
+      fprintf (init_file,
+	       "        = add_builtin_function (\"%s\",\n",
+	       bifs[i].proto.bifname);
+      fprintf (init_file,
+	       "                                %s,\n",
+	       bifs[i].fndecl);
+      fprintf (init_file,
+	       "                                (int)RS6000_BIF_%s,"
+	       " BUILT_IN_MD,\n",
+	       bifs[i].idname);
+      fprintf (init_file,
+	       "                                NULL, NULL_TREE);\n");
+      if (bifs[i].kind == FNK_CONST)
+	{
+	  fprintf (init_file, "      TREE_READONLY (t) = 1;\n");
+	  fprintf (init_file, "      TREE_NOTHROW (t) = 1;\n");
+	}
+      else if (bifs[i].kind == FNK_PURE)
+	{
+	  fprintf (init_file, "      DECL_PURE_P (t) = 1;\n");
+	  fprintf (init_file, "      TREE_NOTHROW (t) = 1;\n");
+	}
+      else if (bifs[i].kind == FNK_FPMATH)
+	{
+	  fprintf (init_file, "      TREE_NOTHROW (t) = 1;\n");
+	  fprintf (init_file, "      if (flag_rounding_math)\n");
+	  fprintf (init_file, "        {\n");
+	  fprintf (init_file, "          DECL_PURE_P (t) = 1;\n");
+	  fprintf (init_file, "          DECL_IS_NOVOPS (t) = 1;\n");
+	  fprintf (init_file, "        }\n");
+	  fprintf (init_file, "      else\n");
+	  fprintf (init_file, "        TREE_READONLY (t) = 1;\n");
+	}
+
+      if (tf_found)
+	{
+	  fprintf (init_file, "        }\n");
+	  fprintf (init_file, "      else\n");
+	  fprintf (init_file, "        {\n");
+	  fprintf (init_file, "          rs6000_builtin_decls_x"
+		   "[(int)RS6000_BIF_%s] = NULL_TREE;\n", bifs[i].idname);
+	  fprintf (init_file, "        }\n");
+	}
+      fprintf (init_file, "    }\n\n");
+    }
 }
 
 /* Write code to initialize the overload table.  */