From: bernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 15 Feb 2016 12:04:13 +0000 (+0000)
Subject: Don't make something with an autoinc an equivalencing insn (PR69752).
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=976b4d1b9ce46bdf3ae038323d5e40966dc5b0dc;p=thirdparty%2Fgcc.git

Don't make something with an autoinc an equivalencing insn (PR69752).

	PR rtl-optimization/69752
	* ira.c (update_equiv_regs): When looking for more than a single SET,
	also take other side effects into account.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@233423 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 45f7b6ee8168..a50c2075759e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-02-15  Bernd Schmidt  <bschmidt@redhat.com>
+
+	PR rtl-optimization/69752
+	* ira.c (update_equiv_regs): When looking for more than a single SET,
+	also take other side effects into account.
+
 2016-02-15  Marcin Kościelnicki  <koriakin@0x04.net>
 
 	* config/s390/s390.c (s390_function_profiler): Add a new sequence
diff --git a/gcc/ira.c b/gcc/ira.c
index 81d1d3399479..6b4a104cf8bb 100644
--- a/gcc/ira.c
+++ b/gcc/ira.c
@@ -3392,7 +3392,8 @@ update_equiv_regs (void)
 
 	  /* If this insn contains more (or less) than a single SET,
 	     only mark all destinations as having no known equivalence.  */
-	  if (set == NULL_RTX)
+	  if (set == NULL_RTX
+	      || side_effects_p (SET_SRC (set)))
 	    {
 	      note_stores (PATTERN (insn), no_equiv, NULL);
 	      continue;