From a1bac22c43e4b71d5e770ca9b43aaf9fbee45022 Mon Sep 17 00:00:00 2001 From: James E Wilson Date: Tue, 20 Apr 2004 03:57:59 +0000 Subject: [PATCH] Eliminate broken unused function. * rtl.h (reg_set_last): Delete declaration. * rtlanal.c (reg_set_last): Delete. From-SVN: r80879 --- gcc/ChangeLog | 5 +++++ gcc/rtl.h | 1 - gcc/rtlanal.c | 48 ------------------------------------------------ 3 files changed, 5 insertions(+), 49 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 695043e..2d7b398 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2004-04-19 James E Wilson + + * rtl.h (reg_set_last): Delete declaration. + * rtlanal.c (reg_set_last): Delete. + 2004-04-19 Roger Sayle * fold-const.c (fold_convert): Make function extern/public. diff --git a/gcc/rtl.h b/gcc/rtl.h index f6ebe34..4c44332 100644 --- a/gcc/rtl.h +++ b/gcc/rtl.h @@ -1844,7 +1844,6 @@ extern int reg_overlap_mentioned_p (rtx, rtx); extern rtx set_of (rtx, rtx); extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *); extern void note_uses (rtx *, void (*) (rtx *, void *), void *); -extern rtx reg_set_last (rtx, rtx); extern int dead_or_set_p (rtx, rtx); extern int dead_or_set_regno_p (rtx, unsigned int); extern rtx find_reg_note (rtx, enum reg_note, rtx); diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index c66cc9a..aade423 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -1598,54 +1598,6 @@ reg_overlap_mentioned_p (rtx x, rtx in) } } -/* Return the last value to which REG was set prior to INSN. If we can't - find it easily, return 0. - - We only return a REG, SUBREG, or constant because it is too hard to - check if a MEM remains unchanged. */ - -rtx -reg_set_last (rtx x, rtx insn) -{ - rtx orig_insn = insn; - - /* Scan backwards until reg_set_last_1 changed one of the above flags. - Stop when we reach a label or X is a hard reg and we reach a - CALL_INSN (if reg_set_last_last_regno is a hard reg). - - If we find a set of X, ensure that its SET_SRC remains unchanged. */ - - /* We compare with <= here, because reg_set_last_last_regno - is actually the number of the first reg *not* in X. */ - for (; - insn && GET_CODE (insn) != CODE_LABEL - && ! (GET_CODE (insn) == CALL_INSN - && REGNO (x) <= FIRST_PSEUDO_REGISTER); - insn = PREV_INSN (insn)) - if (INSN_P (insn)) - { - rtx set = set_of (x, insn); - /* OK, this function modify our register. See if we understand it. */ - if (set) - { - rtx last_value; - if (GET_CODE (set) != SET || SET_DEST (set) != x) - return 0; - last_value = SET_SRC (x); - if (CONSTANT_P (last_value) - || ((GET_CODE (last_value) == REG - || GET_CODE (last_value) == SUBREG) - && ! reg_set_between_p (last_value, - insn, orig_insn))) - return last_value; - else - return 0; - } - } - - return 0; -} - /* Call FUN on each register or MEM that is stored into or clobbered by X. (X would be the pattern of an insn). FUN receives two arguments: -- 2.7.4