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re PR tree-optimization/77536 (Vectorizer not maintaining relationship of relative block frequencies in absence of real profile data)

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PR tree-optimization/77536
	PR rtl-optimization/68212
	* config/rs6000/rs6000.md (div->recip splitter): Remove
	optimize_insn_for_speed_p condition.

From-SVN: r240113
This commit is contained in:
Pat Haugen 2016-09-13 15:58:52 +00:00 committed by Pat Haugen
parent 42763690bd
commit c77b8713a7
2 changed files with 11 additions and 2 deletions
gcc
ChangeLog
config/rs6000
rs6000.md

7
gcc/ChangeLog

@ -1,3 +1,10 @@
2016-09-13 Pat Haugen <pthaugen@us.ibm.com>
PR tree-optimization/77536
PR rtl-optimization/68212
* config/rs6000/rs6000.md (div->recip splitter): Remove
optimize_insn_for_speed_p condition.
2016-09-13 Maciej W. Rozycki <macro@imgtec.com>
* optabs.c (prepare_cmp_insn): Update documentation comment.

6
gcc/config/rs6000/rs6000.md

@ -4323,13 +4323,15 @@
;; Split to create division from FRE/FRES/etc. and fixup instead of the normal
;; hardware division. This is only done before register allocation and with
;; -ffast-math. This must appear before the divsf3/divdf3 insns.
;; We used to also check optimize_insn_for_speed_p () but problems with guessed
;; frequencies (pr68212/pr77536) yields that unreliable so it was removed.
(define_split
[(set (match_operand:RECIPF 0 "gpc_reg_operand" "")
(div:RECIPF (match_operand 1 "gpc_reg_operand" "")
(match_operand 2 "gpc_reg_operand" "")))]
"RS6000_RECIP_AUTO_RE_P (<MODE>mode)
&& can_create_pseudo_p () && optimize_insn_for_speed_p ()
&& flag_finite_math_only && !flag_trapping_math && flag_reciprocal_math"
&& can_create_pseudo_p () && flag_finite_math_only
&& !flag_trapping_math && flag_reciprocal_math"
[(const_int 0)]
{
rs6000_emit_swdiv (operands[0], operands[1], operands[2], true);