From b8f045e2e4d0fd3cebf715cca45ba7de08b25bd2 Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Thu, 20 Mar 2014 20:47:09 +0100
Subject: [PATCH] re PR middle-end/60597 (ICE in df_refs_verify, at
 df-scan.c:4323)

	PR middle-end/60597
	* ira.c (adjust_cleared_regs): Call copy_rtx on
	*reg_equiv[REGNO (loc)].src_p before passing it to
	simplify_replace_fn_rtx.

	* g++.dg/opt/pr60597.C: New test.

From-SVN: r208735
---
 gcc/ChangeLog                      |  5 ++++
 gcc/ira.c                          |  2 +-
 gcc/testsuite/ChangeLog            |  3 ++
 gcc/testsuite/g++.dg/opt/pr60597.C | 46 ++++++++++++++++++++++++++++++
 4 files changed, 55 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/g++.dg/opt/pr60597.C

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index bc43ad231f1..6821c91516d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 2014-03-20  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/60597
+	* ira.c (adjust_cleared_regs): Call copy_rtx on
+	*reg_equiv[REGNO (loc)].src_p before passing it to
+	simplify_replace_fn_rtx.
+
 	PR target/60568
 	* config/i386/i386.c (x86_output_mi_thunk): Surround UNSPEC_GOT
 	into CONST, put pic register as first operand of PLUS.  Use
diff --git a/gcc/ira.c b/gcc/ira.c
index 7c49b7f6b74..4d91d2196a6 100644
--- a/gcc/ira.c
+++ b/gcc/ira.c
@@ -3428,7 +3428,7 @@ adjust_cleared_regs (rtx loc, const_rtx old_rtx ATTRIBUTE_UNUSED, void *data)
     {
       bitmap cleared_regs = (bitmap) data;
       if (bitmap_bit_p (cleared_regs, REGNO (loc)))
-	return simplify_replace_fn_rtx (*reg_equiv[REGNO (loc)].src_p,
+	return simplify_replace_fn_rtx (copy_rtx (*reg_equiv[REGNO (loc)].src_p),
 					NULL_RTX, adjust_cleared_regs, data);
     }
   return NULL_RTX;
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 3cadcfea47c..2475787808c 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2014-03-20  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/60597
+	* g++.dg/opt/pr60597.C: New test.
+
 	PR c++/60572
 	* g++.dg/init/pr60572.C: New test.
 
diff --git a/gcc/testsuite/g++.dg/opt/pr60597.C b/gcc/testsuite/g++.dg/opt/pr60597.C
new file mode 100644
index 00000000000..c61f7679765
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/pr60597.C
@@ -0,0 +1,46 @@
+// PR middle-end/60597
+// { dg-do compile }
+// { dg-options "-O2 -g" }
+
+struct A
+{
+  int foo () const;
+  int bar () const;
+  int a;
+};
+
+struct B
+{
+  int foo ();
+  int bar ();
+};
+
+int *c, d;
+
+int
+A::foo () const
+{
+  int b = a >> 16;
+  return b;
+}
+
+int
+A::bar () const
+{
+  int b = a;
+  return b;
+}
+
+void
+baz (A &x, B h, int i, int j)
+{
+  for (; i < h.bar (); ++i)
+    for (; h.foo (); ++j)
+      {
+	int g = x.foo ();
+	int f = x.bar ();
+	int e = c[0] & 1;
+	d = (e << 1) | (g << 16) | (f & 1);
+	c[j] = 0;
+      }
+}
-- 
2.30.2