From: Richard Biener <rguenther@suse.de>
Date: Fri, 3 May 2019 11:21:18 +0000 (+0000)
Subject: re PR tree-optimization/90316 (large compile time increase in opt / alias stmt walkin... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3353ebf0d9a20f07597b90943664f10557488ea8;p=gcc.git

re PR tree-optimization/90316 (large compile time increase in opt / alias stmt walking for Go example)

2019-05-03  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/90316
	* tree-ssa-pre.c (pass_pre::execute): Re-compute DOM fast queries
	before running VN.

From-SVN: r270848
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 8b34efa5c03..d656ad76ab9 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2019-05-03  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/90316
+	* tree-ssa-pre.c (pass_pre::execute): Re-compute DOM fast queries
+	before running VN.
+
 2019-05-03  Richard Biener  <rguenther@suse.de>
 
 	* tree-vect-stmts.c (get_group_load_store_type): Avoid
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c
index 7bb2cf1e220..e1c75f8e906 100644
--- a/gcc/tree-ssa-pre.c
+++ b/gcc/tree-ssa-pre.c
@@ -4197,6 +4197,7 @@ pass_pre::execute (function *fun)
   loop_optimizer_init (LOOPS_NORMAL);
   split_critical_edges ();
   scev_initialize ();
+  calculate_dominance_info (CDI_DOMINATORS);
 
   run_rpo_vn (VN_WALK);