re PR inline-asm/67448 (compiler crash#inline assembly#rvalue operand with constraint "m")

	PR inline-asm/67448
	* gimplify.c (gimplify_asm_expr): Don't allow MODIFY_EXPR as
	a memory input.

	* gcc.dg/asm-10.c: New test.

From-SVN: r227517

gcc/ChangeLog

 2015-09-07  Marek Polacek  <polacek@redhat.com>
 
+	PR inline-asm/67448
+	* gimplify.c (gimplify_asm_expr): Don't allow MODIFY_EXPR as
+	a memory input.
+
+2015-09-07  Marek Polacek  <polacek@redhat.com>
+
 	* system.h (INTTYPE_MINIMUM): Rewrite to avoid shift warning.
 
 2015-09-04  Paolo Bonzini  <bonzini@gnu.org>

gcc/gimplify.c

@@ -5210,7 +5210,8 @@ gimplify_asm_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
 	  if (TREE_CODE (inputv) == PREDECREMENT_EXPR
 	      || TREE_CODE (inputv) == PREINCREMENT_EXPR
 	      || TREE_CODE (inputv) == POSTDECREMENT_EXPR
-	      || TREE_CODE (inputv) == POSTINCREMENT_EXPR)
+	      || TREE_CODE (inputv) == POSTINCREMENT_EXPR
+	      || TREE_CODE (inputv) == MODIFY_EXPR)
 	    TREE_VALUE (link) = error_mark_node;
 	  tret = gimplify_expr (&TREE_VALUE (link), pre_p, post_p,
 				is_gimple_lvalue, fb_lvalue | fb_mayfail);

gcc/testsuite/ChangeLog

+2015-09-07  Marek Polacek  <polacek@redhat.com>
+
+	PR inline-asm/67448
+	* gcc.dg/asm-10.c: New test.
+
 2015-09-04  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/67452

gcc/testsuite/gcc.dg/asm-10.c

+/* PR inline-asm/67448 */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+void
+f (int i)
+{
+  asm ("" : : "m"(i += 1)); /* { dg-error "not directly addressable" } */
+  asm ("" : : "m"(i++)); /* { dg-error "not directly addressable" } */
+  asm ("" : : "m"(++i)); /* { dg-error "not directly addressable" } */
+  asm ("" : : "m"(i = 0)); /* { dg-error "not directly addressable" } */
+}