From: Jeff Law <law@redhat.com>
Date: Thu, 12 Oct 2017 18:09:11 +0000 (-0600)
Subject: tree-ssa-dse.c (valid_ao_ref_for_dse): Reject ao_refs with negative offsets.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8b48488fbe122c3fa56be84fd048846207466eb0;p=gcc.git

tree-ssa-dse.c (valid_ao_ref_for_dse): Reject ao_refs with negative offsets.

	* tree-ssa-dse.c (valid_ao_ref_for_dse): Reject ao_refs with
	negative offsets.

From-SVN: r253691
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index dc17b705025..d5ee088e77f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2017-10-12  Jeff Law  <law@redhat.com>
+
+	* tree-ssa-dse.c (valid_ao_ref_for_dse): Reject ao_refs with
+	negative offsets.
+
 2017-10-12  Martin Sebor  <msebor@redhat.com>
 
 	PR other/82301
diff --git a/gcc/tree-ssa-dse.c b/gcc/tree-ssa-dse.c
index 6f58fffc693..87e2fce9ac5 100644
--- a/gcc/tree-ssa-dse.c
+++ b/gcc/tree-ssa-dse.c
@@ -131,6 +131,7 @@ valid_ao_ref_for_dse (ao_ref *ref)
 	  && ref->max_size != -1
 	  && ref->size != 0
 	  && ref->max_size == ref->size
+	  && ref->offset >= 0
 	  && (ref->offset % BITS_PER_UNIT) == 0
 	  && (ref->size % BITS_PER_UNIT) == 0
 	  && (ref->size != -1));