From: Andreas Krebbel <krebbel1@de.ibm.com>
Date: Thu, 9 Nov 2006 17:56:04 +0000 (+0000)
Subject: simplify-rtx.c (avoid_constant_pool_reference): Avoid calling simplify_subreg with... 
X-Git-Tag: releases/gcc-4.3.0~8567
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d82a02fa4f3cd88f8d8f080ffe4bd9c7536c7e8f;p=thirdparty%2Fgcc.git

simplify-rtx.c (avoid_constant_pool_reference): Avoid calling simplify_subreg with BLKmode outer mode.

2006-11-09  Andreas Krebbel  <krebbel1@de.ibm.com>

	* simplify-rtx.c (avoid_constant_pool_reference): Avoid calling
	simplify_subreg with BLKmode outer mode.

2006-11-09  Andreas Krebbel  <krebbel1@de.ibm.com>

	* gcc.dg/20061109-1.c: New testcase.

From-SVN: r118622
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 79191a1d70a7..ea975cdbbf69 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2006-11-09  Andreas Krebbel  <krebbel1@de.ibm.com>
+
+	* simplify-rtx.c (avoid_constant_pool_reference): Avoid calling 
+	simplify_subreg with BLKmode outer mode.
+
 2006-11-08  Brooks Moses  <brooks.moses@codesourcery.com>
 
 	* doc/invoke.texi: Minor formatting fixes in option lists.
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index fe5463a3f270..6a9464ca8aa3 100644
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -158,6 +158,9 @@ avoid_constant_pool_reference (rtx x)
       return x;
     }
 
+  if (GET_MODE (x) == BLKmode)
+    return x;
+
   addr = XEXP (x, 0);
 
   /* Call target hook to avoid the effects of -fpic etc....  */
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 93da32fe3331..7980bf9e258e 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2006-11-09  Andreas Krebbel  <krebbel1@de.ibm.com>
+
+	* gcc.dg/20061109-1.c: New testcase.
+
 2006-11-09  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* gcc.dg/builtins-20.c: Use fabs, not __builtin_fabs.
diff --git a/gcc/testsuite/gcc.dg/20061109-1.c b/gcc/testsuite/gcc.dg/20061109-1.c
new file mode 100644
index 000000000000..70ee36d47a8e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/20061109-1.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-O1" } */
+
+/* This assignment might be implemented with a mem copy from the
+   literal pool with two BLKmode operands.  This produced an ICE on S/390
+   since simplify_subreg was called for such a BLKmode operand.  */
+
+struct a
+{
+  unsigned int b:24;
+};
+
+void
+foo (struct a *t)
+{
+  t->b = 32;
+}