From: Jakub Jelinek <jakub@redhat.com>
Date: Tue, 7 Apr 2015 14:34:06 +0000 (+0200)
Subject: re PR middle-end/65680 (ICE at -O1 and above on x86_64-linux-gnu in expand_assignment... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=dcc72b9e73852d9e3b5f40c6dc51da12c444d699;p=gcc.git

re PR middle-end/65680 (ICE at -O1 and above on x86_64-linux-gnu in expand_assignment, at expr.c:4830)

	PR middle-end/65680
	* expr.c (get_inner_reference): Handle bit_offset that doesn't fit
	into signed HOST_WIDE_INT the same as negative bit_offset.

	* gcc.c-torture/compile/pr65680.c: New test.

From-SVN: r221899
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7b977dd8933..dcb7e99bd7f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2015-04-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/65680
+	* expr.c (get_inner_reference): Handle bit_offset that doesn't fit
+	into signed HOST_WIDE_INT the same as negative bit_offset.
+
 2015-04-07  Ilya Enkovich  <ilya.enkovich@intel.com>
 
 	* ipa-comdats.c (ipa_comdats): Visit all thunks
diff --git a/gcc/expr.c b/gcc/expr.c
index dc13a14f4e7..5c095507f4a 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -6941,7 +6941,7 @@ get_inner_reference (tree exp, HOST_WIDE_INT *pbitsize,
   if (offset)
     {
       /* Avoid returning a negative bitpos as this may wreak havoc later.  */
-      if (wi::neg_p (bit_offset))
+      if (wi::neg_p (bit_offset) || !wi::fits_shwi_p (bit_offset))
         {
 	  offset_int mask = wi::mask <offset_int> (LOG2_BITS_PER_UNIT, false);
 	  offset_int tem = bit_offset.and_not (mask);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 34d12535e02..933da2cac14 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-04-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/65680
+	* gcc.c-torture/compile/pr65680.c: New test.
+
 2015-04-07  Andre Vehreschild  <vehre@gmx.de>
 
 	PR fortran/65548
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr65680.c b/gcc/testsuite/gcc.c-torture/compile/pr65680.c
new file mode 100644
index 00000000000..02f08cee26d
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr65680.c
@@ -0,0 +1,20 @@
+/* PR middle-end/65680 */
+/* { dg-do compile { target lp64 } } */
+
+struct S
+{
+  int f : 1;
+} a[100000000000000001][3];
+
+void
+foo (void)
+{
+  struct S b = { 0 };
+  a[100000000000000000][0] = b;
+}
+
+void
+bar (void)
+{
+  a[100000000000000000][0].f = 1;
+}