tm.texi.in (SWITCHABLE_TARGET): Document.

gcc/
	* doc/tm.texi.in (SWITCHABLE_TARGET): Document.
	* doc/tm.texi: Regenerate.
	* Makefile.in (OBJS-common): Add target-globals.o.
	(gtype-desc.o): Depend on $(IPA_PROP_H), $(LTO_STREAMER_H)
	and target-globals.h.
	(target-globals.o): New rule.
	(GTFILES): Include $(srcdir)/target-globals.h.
	* defaults.h (SWITCHABLE_TARGET): Define.
	* gengtype.c (open_base_files): Add target-globals.h to the
	list of includes.
	* target-globals.h: New file.
	* target-globals.c: Likewise.

	* Makefile.in (target-globals.o): Depend on $(FLAGS_H).
	* flags.h (target_flag_state): New structure.
	(default_target_flag_state): Declare.
	(this_target_flag_state): Declare as a variable or define as a macro.
	(align_loops_log): Redefine as a macro.
	(align_loops_max_skip, align_jumps_log): Likewise.
	(align_jumps_max_skip, align_labels_log): Likewise.
	(align_labels_max_skip, align_functions_log): Likewise.
	* toplev.c (default_target_flag_state): New variable.
	(this_target_flag_state): New conditional variable.
	(align_loops_log): Delete.
	(align_loops_max_skip, align_jumps_log): Likewise.
	(align_jumps_max_skip, align_labels_log): Likewise.
	(align_labels_max_skip, align_functions_log): Likewise.
	* target-globals.h (this_target_flag_state): Declare.
	(target_globals): Add a flag_state field.
	(restore_target_globals): Copy the flag_state field to
	this_target_flag_state.
	* target-globals.c: Include flags.h.
	(default_target_globals): Initialize the flag_state field.
	(save_target_globals): Likewise.

From-SVN: r162086

1 files changed, 37 insertions, 13 deletions

diff --git a/gcc/flags.h b/gcc/flags.h
index 5e87c097882..32f9fbfc493 100644
--- a/gcc/flags.h
+++ b/gcc/flags.h
@@ -239,6 +239,43 @@ extern enum excess_precision flag_excess_precision;
 
 /* Other basic status info about current function.  */
 
+/* Target-dependent global state.  */
+struct target_flag_state {
+  /* Values of the -falign-* flags: how much to align labels in code.
+     0 means `use default', 1 means `don't align'.
+     For each variable, there is an _log variant which is the power
+     of two not less than the variable, for .align output.  */
+  int x_align_loops_log;
+  int x_align_loops_max_skip;
+  int x_align_jumps_log;
+  int x_align_jumps_max_skip;
+  int x_align_labels_log;
+  int x_align_labels_max_skip;
+  int x_align_functions_log;
+};
+
+extern struct target_flag_state default_target_flag_state;
+#if SWITCHABLE_TARGET
+extern struct target_flag_state *this_target_flag_state;
+#else
+#define this_target_flag_state (&default_target_flag_state)
+#endif
+
+#define align_loops_log \
+  (this_target_flag_state->x_align_loops_log)
+#define align_loops_max_skip \
+  (this_target_flag_state->x_align_loops_max_skip)
+#define align_jumps_log \
+  (this_target_flag_state->x_align_jumps_log)
+#define align_jumps_max_skip \
+  (this_target_flag_state->x_align_jumps_max_skip)
+#define align_labels_log \
+  (this_target_flag_state->x_align_labels_log)
+#define align_labels_max_skip \
+  (this_target_flag_state->x_align_labels_max_skip)
+#define align_functions_log \
+  (this_target_flag_state->x_align_functions_log)
+
 /* Nonzero if subexpressions must be evaluated from left-to-right.  */
 extern int flag_evaluation_order;
 
@@ -252,19 +289,6 @@ extern bool sel_sched_switch_set;
 /* Whether to run the warn_unused_result attribute pass.  */
 extern bool flag_warn_unused_result;
 
-/* Values of the -falign-* flags: how much to align labels in code.
-   0 means `use default', 1 means `don't align'.
-   For each variable, there is an _log variant which is the power
-   of two not less than the variable, for .align output.  */
-
-extern int align_loops_log;
-extern int align_loops_max_skip;
-extern int align_jumps_log;
-extern int align_jumps_max_skip;
-extern int align_labels_log;
-extern int align_labels_max_skip;
-extern int align_functions_log;
-
 /* Nonzero if we dump in VCG format, not plain text.  */
 extern int dump_for_graph;