re PR target/45475 (target attribute use in libcpp breaks LTO bootstrap)

2010-09-01  Andi Kleen  <ak@linux.intel.com>

        PR lto/45475
        * lto-streamer-in.c (lto_input_ts_target_option): Add.
        (lto_input_tree_pointers): Call lto_input_ts_target_option.
        * lto-streamer-out: (lto_output_ts_target_option): Add.
        (lto_output_tree_pointers): Call lto_output_ts_target_option.

From-SVN: r163740

1 files changed, 21 insertions, 1 deletions

diff --git a/gcc/lto-streamer-out.c b/gcc/lto-streamer-out.c
index dde86b9..80d818c 100644
--- a/gcc/lto-streamer-out.c
+++ b/gcc/lto-streamer-out.c
@@ -1105,6 +1105,26 @@ lto_output_ts_constructor_tree_pointers (struct output_block *ob, tree expr,
     }
 }
 
+/* Write a TS_TARGET_OPTION tree in EXPR to OB.  */
+
+static void
+lto_output_ts_target_option (struct output_block *ob, tree expr)
+{
+  struct cl_target_option *t = TREE_TARGET_OPTION (expr);
+  struct bitpack_d bp;
+  unsigned i, len;
+
+  /* The cl_target_option is target specific and generated by the options
+     awk script, so we just recreate a byte-by-byte copy here. */
+
+  bp = bitpack_create (ob->main_stream);
+  len = sizeof (struct cl_target_option);
+  for (i = 0; i < len; i++)
+    bp_pack_value (&bp, ((unsigned char *)t)[i], 8);
+  /* Catch struct size mismatches between reader and writer. */
+  bp_pack_value (&bp, 0x12345678, 32);
+  lto_output_bitpack (&bp);
+}
 
 /* Helper for lto_output_tree.  Write all pointer fields in EXPR to output
    block OB.  If REF_P is true, the leaves of EXPR are emitted as
@@ -1187,7 +1207,7 @@ lto_output_tree_pointers (struct output_block *ob, tree expr, bool ref_p)
     sorry ("gimple bytecode streams do not support the optimization attribute");
 
   if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
-    sorry ("gimple bytecode streams do not support the target attribute");
+    lto_output_ts_target_option (ob, expr);
 }