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| author | J"orn Rennecke <amylaar@cygnus.co.uk> | 1998-12-15 21:13:42 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 1998-12-15 21:13:42 +0000 |
| commit | a07516d3933f59fd652666e2acd7d4b3fbe80940 (patch) | |
| tree | 67ee29efafd184cb8e26398b858d9a2610d40fd3 | |
| parent | ebc5a9c1d3bbe348b3e4d0858821dc8184191923 (diff) | |
| download | gcc-a07516d3933f59fd652666e2acd7d4b3fbe80940.zip gcc-a07516d3933f59fd652666e2acd7d4b3fbe80940.tar.gz gcc-a07516d3933f59fd652666e2acd7d4b3fbe80940.tar.bz2 | |
loop.c (consec_sets_giv): New argument last_consec_insn.
* loop.c (consec_sets_giv): New argument last_consec_insn.
(strength_reduce): Provide / use it.
From-SVN: r24335
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/loop.c | 25 |
2 files changed, 14 insertions, 16 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 53ad9de..828390a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Wed Dec 16 05:11:04 1998 J"orn Rennecke <amylaar@cygnus.co.uk> + + * loop.c (consec_sets_giv): New argument last_consec_insn. + (strength_reduce): Provide / use it. + Wed Dec 16 17:24:07 1998 Michael Hayes <m.hayes@elec.canterbury.ac.nz> * loop.h (loop_info): New field 'vtop'. @@ -311,7 +311,7 @@ static void update_giv_derive PROTO((rtx)); static int basic_induction_var PROTO((rtx, enum machine_mode, rtx, rtx, rtx *, rtx *)); static rtx simplify_giv_expr PROTO((rtx, int *)); static int general_induction_var PROTO((rtx, rtx *, rtx *, rtx *, int, int *)); -static int consec_sets_giv PROTO((int, rtx, rtx, rtx, rtx *, rtx *)); +static int consec_sets_giv PROTO((int, rtx, rtx, rtx, rtx *, rtx *, rtx *)); static int check_dbra_loop PROTO((rtx, int, rtx, struct loop_info *)); static rtx express_from_1 PROTO((rtx, rtx, rtx)); static rtx express_from PROTO((struct induction *, struct induction *)); @@ -3900,6 +3900,7 @@ strength_reduce (scan_start, end, loop_top, insn_count, rtx mult_val; int benefit; rtx regnote = 0; + rtx last_consec_insn; dest_reg = SET_DEST (set); if (REGNO (dest_reg) < FIRST_PSEUDO_REGISTER) @@ -3923,7 +3924,8 @@ strength_reduce (scan_start, end, loop_top, insn_count, /* or all sets must be consecutive and make a giv. */ || (benefit = consec_sets_giv (benefit, p, src_reg, dest_reg, - &add_val, &mult_val)))) + &add_val, &mult_val, + &last_consec_insn)))) { int count; struct induction *v @@ -3935,19 +3937,8 @@ strength_reduce (scan_start, end, loop_top, insn_count, benefit += libcall_benefit (p); /* Skip the consecutive insns, if there are any. */ - for (count = VARRAY_INT (n_times_set, REGNO (dest_reg)) - 1; - count > 0; count--) - { - /* If first insn of libcall sequence, skip to end. - Do this at start of loop, since INSN is guaranteed to - be an insn here. */ - if (GET_CODE (p) != NOTE - && (temp = find_reg_note (p, REG_LIBCALL, NULL_RTX))) - p = XEXP (temp, 0); - - do p = NEXT_INSN (p); - while (GET_CODE (p) == NOTE); - } + if (VARRAY_INT (n_times_set, REGNO (dest_reg)) != 1) + p = last_consec_insn; record_giv (v, p, src_reg, dest_reg, mult_val, add_val, benefit, DEST_REG, not_every_iteration, NULL_PTR, loop_start, @@ -5997,13 +5988,14 @@ sge_plus (mode, x, y) static int consec_sets_giv (first_benefit, p, src_reg, dest_reg, - add_val, mult_val) + add_val, mult_val, last_consec_insn) int first_benefit; rtx p; rtx src_reg; rtx dest_reg; rtx *add_val; rtx *mult_val; + rtx *last_consec_insn; { int count; enum rtx_code code; @@ -6077,6 +6069,7 @@ consec_sets_giv (first_benefit, p, src_reg, dest_reg, } } + *last_consec_insn = p; return v->benefit; } |