re PR lto/64374 (LTO ICE in extract_insn, at recog.c:2327)

	PR lto/64374
	* target.def (target_option_stream_in): New target hook.
	* tree-streamer-in.c (streamer_read_tree_bitfields): Invoke
	targetm.target_option.post_stream_in if non-NULL.
	* doc/tm.texi.in: Add @hook TARGET_OPTION_POST_STREAM_IN.
	* doc/tm.texi: Updated.
	* config/i386/i386.c (ix86_function_specific_post_stream_in): New
	function.
	(TARGET_OPTION_POST_STREAM_IN): Redefine.

From-SVN: r220958

6 files changed, 89 insertions, 1 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 776821b..dd8db64 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,15 @@
+2015-02-25  Jakub Jelinek  <jakub@redhat.com>
+
+	PR lto/64374
+	* target.def (target_option_stream_in): New target hook.
+	* tree-streamer-in.c (streamer_read_tree_bitfields): Invoke
+	targetm.target_option.post_stream_in if non-NULL.
+	* doc/tm.texi.in: Add @hook TARGET_OPTION_POST_STREAM_IN.
+	* doc/tm.texi: Updated.
+	* config/i386/i386.c (ix86_function_specific_post_stream_in): New
+	function.
+	(TARGET_OPTION_POST_STREAM_IN): Redefine.
+
 2015-02-24  Jeff Law  <law@redhat.com>
 
 	PR target/65117
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 6620021..bc4fb4b 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -2463,6 +2463,7 @@ static void ix86_function_specific_save (struct cl_target_option *,
 					 struct gcc_options *opts);
 static void ix86_function_specific_restore (struct gcc_options *opts,
 					    struct cl_target_option *);
+static void ix86_function_specific_post_stream_in (struct cl_target_option *);
 static void ix86_function_specific_print (FILE *, int,
 					  struct cl_target_option *);
 static bool ix86_valid_target_attribute_p (tree, tree, tree, int);
@@ -4571,6 +4572,57 @@ ix86_function_specific_restore (struct gcc_options *opts,
     set_ix86_tune_features (ix86_tune, false);
 }
 
+/* Adjust target options after streaming them in.  This is mainly about
+   reconciling them with global options.  */
+
+static void
+ix86_function_specific_post_stream_in (struct cl_target_option *ptr)
+{
+  /* flag_pic is a global option, but ix86_cmodel is target saved option
+     partly computed from flag_pic.  If flag_pic is on, adjust x_ix86_cmodel
+     for PIC, or error out.  */
+  if (flag_pic)
+    switch (ptr->x_ix86_cmodel)
+      {
+      case CM_SMALL:
+	ptr->x_ix86_cmodel = CM_SMALL_PIC;
+	break;
+
+      case CM_MEDIUM:
+	ptr->x_ix86_cmodel = CM_MEDIUM_PIC;
+	break;
+
+      case CM_LARGE:
+	ptr->x_ix86_cmodel = CM_LARGE_PIC;
+	break;
+
+      case CM_KERNEL:
+	error ("code model %s does not support PIC mode", "kernel");
+	break;
+
+      default:
+	break;
+      }
+  else
+    switch (ptr->x_ix86_cmodel)
+      {
+      case CM_SMALL_PIC:
+	ptr->x_ix86_cmodel = CM_SMALL;
+	break;
+
+      case CM_MEDIUM_PIC:
+	ptr->x_ix86_cmodel = CM_MEDIUM;
+	break;
+
+      case CM_LARGE_PIC:
+	ptr->x_ix86_cmodel = CM_LARGE;
+	break;
+
+      default:
+	break;
+      }
+}
+
 /* Print the current options */
 
 static void
@@ -52007,6 +52059,9 @@ ix86_initialize_bounds (tree var, tree lb, tree ub, tree *stmts)
 #undef TARGET_OPTION_RESTORE
 #define TARGET_OPTION_RESTORE ix86_function_specific_restore
 
+#undef TARGET_OPTION_POST_STREAM_IN
+#define TARGET_OPTION_POST_STREAM_IN ix86_function_specific_post_stream_in
+
 #undef TARGET_OPTION_PRINT
 #define TARGET_OPTION_PRINT ix86_function_specific_print
 
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index 6f36ec6..6e5d2c0 100644
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -9905,6 +9905,12 @@ information in the @code{struct cl_target_option} structure for
 function-specific options to the @code{struct gcc_options} structure.
 @end deftypefn
 
+@deftypefn {Target Hook} void TARGET_OPTION_POST_STREAM_IN (struct cl_target_option *@var{ptr})
+This hook is called to update target-specific information in the
+@code{struct cl_target_option} structure after it is streamed in from
+LTO bytecode.
+@end deftypefn
+
 @deftypefn {Target Hook} void TARGET_OPTION_PRINT (FILE *@var{file}, int @var{indent}, struct cl_target_option *@var{ptr})
 This hook is called to print any additional target-specific
 information in the @code{struct cl_target_option} structure for
diff --git a/gcc/doc/tm.texi.in b/gcc/doc/tm.texi.in
index 121c305..16d5df7 100644
--- a/gcc/doc/tm.texi.in
+++ b/gcc/doc/tm.texi.in
@@ -7251,6 +7251,8 @@ on this implementation detail.
 
 @hook TARGET_OPTION_RESTORE
 
+@hook TARGET_OPTION_POST_STREAM_IN
+
 @hook TARGET_OPTION_PRINT
 
 @hook TARGET_OPTION_PRAGMA_PARSE
diff --git a/gcc/target.def b/gcc/target.def
index 035dece..a00181a 100644
--- a/gcc/target.def
+++ b/gcc/target.def
@@ -5501,6 +5501,15 @@ information in the @code{struct cl_target_option} structure for\n\
 function-specific options to the @code{struct gcc_options} structure.",
  void, (struct gcc_options *opts, struct cl_target_option *ptr), NULL)
 
+/* Function to update target-specific option information after being
+   streamed in.  */
+DEFHOOK
+(post_stream_in,
+ "This hook is called to update target-specific information in the\n\
+@code{struct cl_target_option} structure after it is streamed in from\n\
+LTO bytecode.",
+ void, (struct cl_target_option *ptr), NULL)
+
 /* Function to print any extra target state from the target options
    structure.  */
 DEFHOOK
diff --git a/gcc/tree-streamer-in.c b/gcc/tree-streamer-in.c
index b4b6482..94b6e51 100644
--- a/gcc/tree-streamer-in.c
+++ b/gcc/tree-streamer-in.c
@@ -559,7 +559,11 @@ streamer_read_tree_bitfields (struct lto_input_block *ib,
 
 #ifndef ACCEL_COMPILER
   if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
-    cl_target_option_stream_in (data_in, &bp, TREE_TARGET_OPTION (expr));
+    {
+      cl_target_option_stream_in (data_in, &bp, TREE_TARGET_OPTION (expr));
+      if (targetm.target_option.post_stream_in)
+	targetm.target_option.post_stream_in (TREE_TARGET_OPTION (expr));
+    }
 #endif
 
   if (code == OMP_CLAUSE)