From: Richard Sandiford <richard.sandiford@arm.com>
Date: Fri, 30 Oct 2015 13:47:25 +0000 (+0000)
Subject: Don't free dominators after sincos
X-Git-Tag: basepoints/gcc-7~3441
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a52380e99db36781c7471c0ab6634ae6b80874f3;p=thirdparty%2Fgcc.git

Don't free dominators after sincos

sincos has always freed dominators at the end, but AFAICT they should
still be up-to-date.  (In particular, gimple_purge_dead_eh_edges
updates the information.)

Tested on x86_64-linux-gnu, arm-linux-gnueabi and aarch64-linux-gnu.

gcc/
	* tree-ssa-math-opts.c (pass_cse_sincos::execute): Don't free
	CDI_DOMINATORS.

From-SVN: r229582
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3d8b19c073b1..adbd98e64ed9 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-10-30  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* tree-ssa-math-opts.c (pass_cse_sincos::execute): Don't free
+	CDI_DOMINATORS.
+
 2015-10-30  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* real.h (format_helper): New.
diff --git a/gcc/tree-ssa-math-opts.c b/gcc/tree-ssa-math-opts.c
index 2080328c42d8..1802754e9c19 100644
--- a/gcc/tree-ssa-math-opts.c
+++ b/gcc/tree-ssa-math-opts.c
@@ -1857,7 +1857,6 @@ pass_cse_sincos::execute (function *fun)
   statistics_counter_event (fun, "sincos statements inserted",
 			    sincos_stats.inserted);
 
-  free_dominance_info (CDI_DOMINATORS);
   return cfg_changed ? TODO_cleanup_cfg : 0;
 }