re PR middle-end/52074 (ICE: RTL flag check: MEM_VOLATILE_P used with unexpected…

re PR middle-end/52074 (ICE: RTL flag check: MEM_VOLATILE_P used with unexpected rtx code 'plus' in extract_fixed_bit_field, at expmed.c:1734)

	PR middle-end/52074
	* expr.c (expand_expr_addr_expr_1): For CONSTANT_CLASS_P or CONST_DECL
	if modifier < EXPAND_SUM call force_operand on the result.

	* gcc.c-torture/compile/pr52074.c: New test.

From-SVN: r183956

gcc/ChangeLog

+2012-02-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/52074
+	* expr.c (expand_expr_addr_expr_1): For CONSTANT_CLASS_P or CONST_DECL
+	if modifier < EXPAND_SUM call force_operand on the result.
+
 2012-02-07  Joern Rennecke  <joern.rennecke@embecosm.com>
 
 	* config/epiphany/epiphany.h (ASM_DECLARE_FUNCTION_SIZE): Redefine,

gcc/expr.c

@@ -7414,7 +7414,12 @@ expand_expr_addr_expr_1 (tree exp, rtx target, enum machine_mode tmode,
      generating ADDR_EXPR of something that isn't an LVALUE.  The only
      exception here is STRING_CST.  */
   if (CONSTANT_CLASS_P (exp))
-    return XEXP (expand_expr_constant (exp, 0, modifier), 0);
+    {
+      result = XEXP (expand_expr_constant (exp, 0, modifier), 0);
+      if (modifier < EXPAND_SUM)
+	result = force_operand (result, target);
+      return result;
+    }
 
   /* Everything must be something allowed by is_gimple_addressable.  */
   switch (TREE_CODE (exp))
@@ -7433,7 +7438,11 @@ expand_expr_addr_expr_1 (tree exp, rtx target, enum machine_mode tmode,
 
     case CONST_DECL:
       /* Expand the initializer like constants above.  */
-      return XEXP (expand_expr_constant (DECL_INITIAL (exp), 0, modifier), 0);
+      result = XEXP (expand_expr_constant (DECL_INITIAL (exp),
+					   0, modifier), 0);
+      if (modifier < EXPAND_SUM)
+	result = force_operand (result, target);
+      return result;
 
     case REALPART_EXPR:
       /* The real part of the complex number is always first, therefore

gcc/testsuite/ChangeLog

+2012-02-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/52074
+	* gcc.c-torture/compile/pr52074.c: New test.
+
 2012-02-07  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/51514

gcc/testsuite/gcc.c-torture/compile/pr52074.c

+/* PR middle-end/52074 */
+
+struct S { const char *d, *e; } __attribute__((packed));
+
+void
+foo (const char **p, struct S *q)
+{
+  *p = "abcdef";
+  q->d = "ghijk";
+}