re PR tree-optimization/77536 (Vectorizer not maintaining relationship of relative...

	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

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a11a273..58ab835 100644 (file)
--- a/gcc/ChangeLog
+++ b/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.

diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 7da4370..8d09c8c 100644 (file)
--- a/gcc/config/rs6000/rs6000.md
+++ b/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);