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| author | Andrew Pinski <andrew_pinski@playstation.sony.com> | 2008-09-18 19:28:48 +0000 |
|---|---|---|
| committer | Andrew Pinski <pinskia@gcc.gnu.org> | 2008-09-18 12:28:48 -0700 |
| commit | b2a38b1d6efb356a088567a520e28261b95501bb (patch) | |
| tree | 43575ec0b447fc02801ff346a47da451fef0369d /gcc | |
| parent | c78a2119d8c5728a09df47c7f30a7a190b6864da (diff) | |
| download | gcc-b2a38b1d6efb356a088567a520e28261b95501bb.zip gcc-b2a38b1d6efb356a088567a520e28261b95501bb.tar.gz gcc-b2a38b1d6efb356a088567a520e28261b95501bb.tar.bz2 | |
re PR rtl-optimization/37451 (Extra addition for doloop in some cases)
2008-09-18 Andrew Pinski <andrew_pinski@playstation.sony.com>
PR rtl-opt/37451
* loop-doloop.c (doloop_modify): New argument zero_extend_p and
zero extend count after the correction to it is done.
(doloop_optimize): Update call to doloop_modify, don't zero extend
count before call.
From-SVN: r140470
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/loop-doloop.c | 16 |
2 files changed, 19 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 26a712f..25f2297 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2008-09-18 Andrew Pinski <andrew_pinski@playstation.sony.com> + + PR rtl-opt/37451 + * loop-doloop.c (doloop_modify): New argument zero_extend_p and + zero extend count after the correction to it is done. + (doloop_optimize): Update call to doloop_modify, don't zero extend + count before call. + 2008-09-18 Martin Jambor <mjambor@suse.cz> * ipa-cp.c (ipcp_estimate_growth): Return 0 instead of false. diff --git a/gcc/loop-doloop.c b/gcc/loop-doloop.c index a039f36..25369dd 100644 --- a/gcc/loop-doloop.c +++ b/gcc/loop-doloop.c @@ -333,11 +333,13 @@ add_test (rtx cond, edge *e, basic_block dest) describes the loop, DESC describes the number of iterations of the loop, and DOLOOP_INSN is the low-overhead looping insn to emit at the end of the loop. CONDITION is the condition separated from the - DOLOOP_SEQ. COUNT is the number of iterations of the LOOP. */ + DOLOOP_SEQ. COUNT is the number of iterations of the LOOP. + ZERO_EXTEND_P says to zero extend COUNT after the increment of it to + word_mode. */ static void doloop_modify (struct loop *loop, struct niter_desc *desc, - rtx doloop_seq, rtx condition, rtx count) + rtx doloop_seq, rtx condition, rtx count, bool zero_extend_p) { rtx counter_reg; rtx tmp, noloop = NULL_RTX; @@ -413,6 +415,10 @@ doloop_modify (struct loop *loop, struct niter_desc *desc, if (increment_count) count = simplify_gen_binary (PLUS, mode, count, const1_rtx); + if (zero_extend_p) + count = simplify_gen_unary (ZERO_EXTEND, word_mode, + count, mode); + /* Insert initialization of the count register into the loop header. */ start_sequence (); tmp = force_operand (count, counter_reg); @@ -547,6 +553,7 @@ doloop_optimize (struct loop *loop) struct niter_desc *desc; unsigned word_mode_size; unsigned HOST_WIDE_INT word_mode_max; + bool zero_extend_p = false; if (dump_file) fprintf (dump_file, "Doloop: Processing loop %d.\n", loop->num); @@ -621,8 +628,7 @@ doloop_optimize (struct loop *loop) { if (word_mode_size > GET_MODE_BITSIZE (mode)) { - count = simplify_gen_unary (ZERO_EXTEND, word_mode, - count, mode); + zero_extend_p = true; iterations = simplify_gen_unary (ZERO_EXTEND, word_mode, iterations, mode); iterations_max = simplify_gen_unary (ZERO_EXTEND, word_mode, @@ -666,7 +672,7 @@ doloop_optimize (struct loop *loop) return false; } - doloop_modify (loop, desc, doloop_seq, condition, count); + doloop_modify (loop, desc, doloop_seq, condition, count, zero_extend_p); return true; } |