2002-11-04 Aldy Hernandez <aldyh@redhat.com>

	* hard-reg-set.h (REG_CANNOT_CHANGE_MODE_P): New.

	* config/rs6000/rs6000.h (CLASS_CANNOT_CHANGE_MODE_P): Remove.
	(CLASS_CANNOT_CHANGE_MODE): Remove.
	(CANNOT_CHANGE_MODE_CLASS): New.

	* config/alpha/alpha.h: Same.

	* config/ia64/ia64.h: Same.

	* config/mips/mips.h: Same.

	* config/s390/s390.h: Same.

	* config/sh/sh.h: Same.

	* config/pa/pa64-regs.h: Same.

	* config/sh/sh-protos.h (sh_cannot_change_mode_class): Add prototype.

	* config/sh/sh.c (sh_cannot_change_mode_class): New.

	* config/mips/mips-protos.h (mips_cannot_change_mode_class): Add
	prototype.

	* config/mips/mips.c (mips_cannot_change_mode_class): New.

	* doc/tm.texi (Register Classes): Remove
	CLASS_CANNOT_CHANGE_MODE and CLASS_CANNOT_CHANGE_MODE_P.
	Document CANNOT_CHANGE_MODE_CLASS.

	* reload.c (push_reload): Use CANNOT_CHANGE_MODE_CLASS.
	(push_reload): Same.

	* simplify-rtx.c (simplify_subreg): Same.

	* reload1.c (choose_reload_regs): Same.

	* recog.c (register_operand): Same.

	* regrename.c (mode_change_ok): Change to use new
	CANNOT_CHANGE_MODE_CLASS infrastructure.

	* regclass.c (cannot_change_mode_set_regs): New.
	Declare subregs_of_mode.
	(regclass): Use subregs_of_mode.
	Remove references to reg_changes_mode.
	(init_reg_sets_1): Remove class_can_change_mode and
	reg_changes_mode code.
	(invalid_mode_change_p): New.
	(dump_regclass): Use invalid_mode_change_p instead of
	class_can_change_mode.
	(regclass): Same.
	(record_operand_costs): Do not set reg_changes_mode.

	* local-alloc.c (struct qty): Remove changes_mode field.
	(alloc_qty): Remove changes_mode initialization.
	(update_qty_class): Remove set of changes_mode.
	(find_free_reg): Use subregs_of_mode.

	* global.c (find_reg): Use subregs_of_mode info.

	* rtl.h (cannot_change_mode_set_regs): New prototype.
	(invalid_mode_change_p): Same.
	(REG_CANNOT_CHANGE_MODE_P): New macro.

	* flow.c (mark_used_regs): Calculate subregs_of_mode.  Remove
	REG_CHANGES_MODE.
	(life_analysis): Clear subregs_of_mode.

	* combine.c (subst): Pass class to CLASS_CANNOT_CHANGE_MODE_P.
	Remove use of CLASS_CANNOT_CHANGE_MODE.
	(simplify_set): Same.
	(gen_lowpart_for_combine): Calculate subregs_of_mode.  Remove
	REG_CHANGES_MODE.

	* regs.h: Add extern for subregs_of_mode;
	Include hard-reg-set and basic-block.
	(REG_CHANGES_MODE): Delete.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@58794 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 4 insertions, 8 deletions

diff --git a/gcc/config/pa/pa64-regs.h b/gcc/config/pa/pa64-regs.h
index 0af4c5fb270..2d0ebe3d172 100644
--- a/gcc/config/pa/pa64-regs.h
+++ b/gcc/config/pa/pa64-regs.h
@@ -232,12 +232,7 @@ enum reg_class { NO_REGS, R1_REGS, GENERAL_REGS, FPUPPER_REGS, FP_REGS,
   {0x00000000, 0x10000000},	/* SHIFT_REGS */		\
   {0xfffffffe, 0x1fffffff}}	/* ALL_REGS */
 
-/* If defined, gives a class of registers that cannot be used as the
-   operand of a SUBREG that changes the mode of the object illegally.  */
-
-#define CLASS_CANNOT_CHANGE_MODE	(FP_REGS)
-
-/* Defines illegal mode changes for CLASS_CANNOT_CHANGE_MODE.
+/* Defines invalid mode changes.
 
    SImode loads to floating-point registers are not zero-extended.
    The definition for LOAD_EXTEND_OP specifies that integer loads
@@ -245,8 +240,9 @@ enum reg_class { NO_REGS, R1_REGS, GENERAL_REGS, FPUPPER_REGS, FP_REGS,
    we inhibit changes from SImode unless they are to a mode that is
    identical in size.  */
 
-#define CLASS_CANNOT_CHANGE_MODE_P(FROM,TO)				\
-  ((FROM) == SImode && GET_MODE_SIZE (FROM) != GET_MODE_SIZE (TO))
+#define CANNOT_CHANGE_MODE_CLASS(FROM, TO)			\
+  ((FROM) == SImode && GET_MODE_SIZE (FROM) != GET_MODE_SIZE (TO)       \
+   ? FP_REGS : NO_REGS)
 
 /* Return the class number of the smallest class containing
    reg number REGNO.  This could be a conditional expression