From: Jakub Jelinek <jakub@redhat.com>
Date: Tue, 19 Jul 2011 19:32:12 +0000 (+0200)
Subject: backport: re PR rtl-optimization/49619 (ICE in simplify_subreg, at simplify-rtx.c... 
X-Git-Tag: releases/gcc-4.4.7~313
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ae304212d35a01ca79ebf2b33de836afab827e7;p=thirdparty%2Fgcc.git

backport: re PR rtl-optimization/49619 (ICE in simplify_subreg, at simplify-rtx.c:5362)

	Backport from mainline
	2011-07-04  Jakub Jelinek  <jakub@redhat.com>

	PR rtl-optimization/49619
	* combine.c (combine_simplify_rtx): In PLUS -> IOR simplification
	pass VOIDmode as op0_mode to recursive call.

	* gcc.dg/pr49619.c: New test.

From-SVN: r176485
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ceede27601ca..f653e9405855 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,12 @@
 2011-07-19  Jakub Jelinek  <jakub@redhat.com>
 
 	Backport from mainline
+	2011-07-04  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/49619
+	* combine.c (combine_simplify_rtx): In PLUS -> IOR simplification
+	pass VOIDmode as op0_mode to recursive call.
+
 	2011-05-27  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/49165
diff --git a/gcc/combine.c b/gcc/combine.c
index 42a465ecc58e..d1ee51c84832 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -4983,7 +4983,7 @@ combine_simplify_rtx (rtx x, enum machine_mode op0_mode, int in_dest)
 	{
 	  /* Try to simplify the expression further.  */
 	  rtx tor = simplify_gen_binary (IOR, mode, XEXP (x, 0), XEXP (x, 1));
-	  temp = combine_simplify_rtx (tor, mode, in_dest);
+	  temp = combine_simplify_rtx (tor, VOIDmode, in_dest);
 
 	  /* If we could, great.  If not, do not go ahead with the IOR
 	     replacement, since PLUS appears in many special purpose
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 153a20c6d3e2..4c256de8369f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,6 +1,11 @@
 2011-07-19  Jakub Jelinek  <jakub@redhat.com>
 
 	Backport from mainline
+	2011-07-04  Jakub Jelinek  <jakub@redhat.com>
+
+	PR rtl-optimization/49619
+	* gcc.dg/pr49619.c: New test.
+
 	2011-05-27  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/49165
diff --git a/gcc/testsuite/gcc.dg/pr49619.c b/gcc/testsuite/gcc.dg/pr49619.c
new file mode 100644
index 000000000000..d0a72a6edd19
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr49619.c
@@ -0,0 +1,13 @@
+/* PR rtl-optimization/49619 */
+/* { dg-do compile } */
+/* { dg-options "-O -fno-tree-fre" } */
+
+extern int a, b;
+
+void
+foo (int x)
+{
+  a = 2;
+  b = 0;
+  b = (a && ((a = 1, 0 >= b) || (short) (x + (b & x))));
+}