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* combine.c (expand_compound_operation) <ZERO_EXTRACT>: Add
authorsteven <steven@138bc75d-0d04-0410-961f-82ee72b054a4>
Wed, 5 Jan 2005 23:19:23 +0000 (23:19 +0000)
committersteven <steven@138bc75d-0d04-0410-961f-82ee72b054a4>
Wed, 5 Jan 2005 23:19:23 +0000 (23:19 +0000)
commit476d094d7713bdd77be9c7863518b69342c7a4b4
tree8d81e917b2a1cc0618df0ec47f5dcced22b199dc
parent37e6be124c7dc5274014a63bdd8eeeb6057e6c43
* combine.c (expand_compound_operation)  <ZERO_EXTRACT>: Add
comment that we fall through after case.
(mark_used_regs_combine): Don't expect a SIGN_EXTRACT in a SET_DEST.
(distribute_links): Likewise.
* cse.c (cse_insn): Likewise.
* cselib.c (cselib_invalidate_mem): Likewise.
* df.c: Update comments at the top of the file.
(read_modify_subreg_p): Update comments here too.
(df_def_record_1): Don't expect a SIGN_EXTRACT in a SET_DEST.
* flow.c (mark_set_1): Likewise.
(mark_used_regs): Likewise.
* gcse.c (mems_conflict_for_gcse_p): Likewise.
(canon_list_insert): Likewise.
(mark_set): Likewise.
(try_replace_reg): Likewise.
(store_killed_in_insn): Likewise.
* loop.c (count_one_set): Likewise.
(basic_induction_var): Likewise.
* postreload-gcse.c (find_mem_conflicts): Likewise.
* postreload.c (reload_combine_note_store): Likewise.
(move2add_note_store): Likewise.
* reload.c (find_equiv_reg): Likewise.
(mark_referenced_resources): Likewise.
* rtlanal.c (set_noop_p): Likewise.
(note_stores): Likewise.
(note_uses): Likewise.
* sched-deps.c (sched_analyze_1): Likewise.
* sched-rgn.c (check_live_1): Likewise.
(update_live_1): Likewise.
* config/i860/i860.c: Likewise.

* rtl.dec (SIGN_EXTRACT): Document that this cannot appear as
an lvalue.
(ZERO_EXTRACT): Mention that this one can be an lvalue.

* doc/rtl.texi: Update documentation for bit-fields and SET.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@92974 138bc75d-0d04-0410-961f-82ee72b054a4
18 files changed:
gcc/ChangeLog
gcc/combine.c
gcc/config/i860/i860.c
gcc/cse.c
gcc/cselib.c
gcc/df.c
gcc/doc/rtl.texi
gcc/flow.c
gcc/gcse.c
gcc/loop.c
gcc/postreload-gcse.c
gcc/postreload.c
gcc/reload.c
gcc/resource.c
gcc/rtl.def
gcc/rtlanal.c
gcc/sched-deps.c
gcc/sched-rgn.c