gcc/

	* hard-reg-set.h: Include hash-table.h.
	(target_hard_regs): Add a finalize method and a x_simplifiable_subregs
	field.
	* target-globals.c (target_globals::~target_globals): Call
	hard_regs->finalize.
	* rtl.h (subreg_shape): New structure.
	(shape_of_subreg): New function.
	(simplifiable_subregs): Declare.
	* reginfo.c (simplifiable_subreg): New structure.
	(simplifiable_subregs_hasher): Likewise.
	(simplifiable_subregs): New function.
	(invalid_mode_changes): Delete.
	(alid_mode_changes, valid_mode_changes_obstack): New variables.
	(record_subregs_of_mode): Remove subregs_of_mode parameter.
	Record valid mode changes in valid_mode_changes.
	(find_subregs_of_mode): Remove subregs_of_mode parameter.
	Update calls to record_subregs_of_mode.
	(init_subregs_of_mode): Remove invalid_mode_changes and bitmap
	handling.  Initialize new variables.  Update call to
	find_subregs_of_mode.
	(invalid_mode_change_p): Check new variables instead of
	invalid_mode_changes.
	(finish_subregs_of_mode): Finalize new variables instead of
	invalid_mode_changes.
	(target_hard_regs::finalize): New function.
	* ira-costs.c (print_allocno_costs): Call invalid_mode_change_p
	even when CLASS_CANNOT_CHANGE_MODE is undefined.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@215449 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 10 insertions, 0 deletions

diff --git a/gcc/hard-reg-set.h b/gcc/hard-reg-set.h
index 401fea1bab8..c32516c6913 100644
--- a/gcc/hard-reg-set.h
+++ b/gcc/hard-reg-set.h
@@ -20,6 +20,8 @@ along with GCC; see the file COPYING3.  If not see
 #ifndef GCC_HARD_REG_SET_H
 #define GCC_HARD_REG_SET_H
 
+#include "hash-table.h"
+
 /* Define the type of a set of hard registers.  */
 
 /* HARD_REG_ELT_TYPE is a typedef of the unsigned integral type which
@@ -613,7 +615,11 @@ hard_reg_set_iter_next (hard_reg_set_iterator *iter, unsigned *regno)
 
 extern char global_regs[FIRST_PSEUDO_REGISTER];
 
+struct simplifiable_subregs_hasher;
+
 struct target_hard_regs {
+  void finalize ();
+
   /* The set of registers that actually exist on the current target.  */
   HARD_REG_SET x_accessible_reg_set;
 
@@ -688,6 +694,10 @@ struct target_hard_regs {
 
   /* Vector indexed by hardware reg giving its name.  */
   const char *x_reg_names[FIRST_PSEUDO_REGISTER];
+
+  /* Records which registers can form a particular subreg, with the subreg
+     being identified by its outer mode, inner mode and offset.  */
+  hash_table <simplifiable_subregs_hasher> *x_simplifiable_subregs;
 };
 
 extern struct target_hard_regs default_target_hard_regs;