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2003-06-18 Stephen Clarke <stephen.clarke@superh.com>
authoramylaar <amylaar@138bc75d-0d04-0410-961f-82ee72b054a4>
Wed, 18 Jun 2003 19:43:55 +0000 (19:43 +0000)
committeramylaar <amylaar@138bc75d-0d04-0410-961f-82ee72b054a4>
Wed, 18 Jun 2003 19:43:55 +0000 (19:43 +0000)
commit8af3db02b0b3bd115867b56dbef4c21c52dec1d2
treeb7be589065a18041782f05367c05430c81cde781
parentf0dd33b55150788330b956f89774c627cadc8056
2003-06-18  Stephen Clarke <stephen.clarke@superh.com>
            J"orn Rennecke <joern.rennecke@superh.com>

* bt-load.c: New file.
* Makefile.in (OBJS): Include bt-load.o
(bt-load.o): Add dependencies.
* flags.h (flag_branch_target_load_optimize): Declare.
(flag_branch_target_load_optimize2): Likewise.
* hooks.c (hook_reg_class_void_no_regs): New function.
(hook_bool_bool_false): Likewise.
* hooks.h (hook_reg_class_void_no_regs, hook_bool_bool_false): Declare.
* rtl.h (branch_target_load_optimize): Declare.
* target-def.h (TARGET_BRANCH_TARGET_REGISTER_CLASS): Define.
(TARGET_BRANCH_TARGET_REGISTER_CALLEE_SAVED): Likewise.
(TARGET_INITIALIZER): Include these.
* target.h (struct gcc_target): Add branch_target_register_class
and branch_target_register_callee_saved members.
* toplev.c (enum dump_file_index): Add DFI_branch_target_load
(dump_file) Add "tars" entry.
(flag_branch_target_load_optimize): New variable.
(flag_branch_target_load_optimize2): Likewise.
(lang_independent_options): Add entries for new options.
(rest_of_compilation): Call branch_target_load_optimize.
* doc/tm.texi (TARGET_BRANCH_TARGET_REGISTER_CLASS): Document.
(TARGET_BRANCH_TARGET_REGISTER_CALLEE_SAVED): Likewise.
* doc/invoke.texi: Document -fbranch-target-load-optimize and
-fbranch-target-load-optimize2.
* rtl.h (epilogue_completed): Declare.
* recog.c (epilogue_completed): New variable.
* toplev.c (rest_of_compilation): Set it.
* flow.c (mark_regs_live_at_end): Use it.
* config/ia64/ia64.c (ia64_output_mi_thunk): Set it.
* config/rs6000/rs6000.c (rs6000_output_mi_thunk): Likewise.
* config/sh/sh.c (sh_output_mi_thunk): Likewise.
* config/sparc/sparc.c (sparc_output_mi_thunk): Likewise.

* sh.c (shmedia_space_reserved_for_target_registers): New variable.
(sh_target_reg_class): New function.
(sh_optimize_target_register_callee_saved): Likwise.
(shmedia_target_regs_stack_space): Likewise.
(shmedia_reserve_space_for_target_registers_p): Likewise.
(shmedia_target_regs_stack_adjust): Likewise.
(TARGET_BRANCH_TARGET_REGISTER_CLASS): Override.
(TARGET_BRANCH_TARGET_REGISTER_CALLEE_SAVED): Likewise.
(calc_live_regs): If flag_branch_target_load_optimize2 and
TARGET_SAVE_ALL_TARGET_REGS is enabled, and we have space reserved
for target registers, make sure that we save all target registers.
(sh_expand_prologue, sh_expand_epilogue): Take target register
optimizations into account.  Collapse stack adjustments if that
is beneficial.
(initial_elimination_offset): Reserve space for target registers
if necessary.
* sh.h (SAVE_ALL_TR_BIT, TARGET_SAVE_ALL_TARGET_REGS): Define.
(OPTIMIZATION_OPTIONS): Enable flag_branch_target_load_optimize.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@68165 138bc75d-0d04-0410-961f-82ee72b054a4
19 files changed:
gcc/ChangeLog
gcc/Makefile.in
gcc/bt-load.c [new file with mode: 0644]
gcc/config/ia64/ia64.c
gcc/config/rs6000/rs6000.c
gcc/config/sh/sh.c
gcc/config/sh/sh.h
gcc/config/sparc/sparc.c
gcc/doc/invoke.texi
gcc/doc/tm.texi
gcc/flags.h
gcc/flow.c
gcc/hooks.c
gcc/hooks.h
gcc/recog.c
gcc/rtl.h
gcc/target-def.h
gcc/target.h
gcc/toplev.c