re PR c++/65525 (ICE: sorry, unimplemented: unexpected AST of kind mem_ref (-std...

	PR c++/65525
	* constexpr.c (potential_constant_expression_1): Handle MEM_REF.

From-SVN: r221699

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 4ba45d72c6acda156a3a406dcf94bfc392c18351..e3699f63c046216619ecc5c5a8936af0153117b0 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,8 @@
+2015-03-26  Jason Merrill  <jason@redhat.com>
+
+       PR c++/65525
+       * constexpr.c (potential_constant_expression_1): Handle MEM_REF.
+
 2015-03-25  Marek Polacek  <polacek@redhat.com>
 
        PR c++/65558

diff --git a/gcc/cp/constexpr.c b/gcc/cp/constexpr.c
index 37b619d56ff2c0cd5518749474fab6d0d16f474f..2f0947215469b7723b4ebf4721209295ac9434fd 100644 (file)
--- a/gcc/cp/constexpr.c
+++ b/gcc/cp/constexpr.c
@@ -4395,6 +4395,7 @@ potential_constant_expression_1 (tree t, bool want_rval, bool strict,
     case ARRAY_RANGE_REF:
     case MEMBER_REF:
     case DOTSTAR_EXPR:
+    case MEM_REF:
     binary:
       for (i = 0; i < 2; ++i)
        if (!RECUR (TREE_OPERAND (t, i), want_rval))

diff --git a/gcc/testsuite/g++.dg/parse/assign1.C b/gcc/testsuite/g++.dg/parse/assign1.C
new file mode 100644 (file)
index 0000000..c0138c1
--- /dev/null
+++ b/gcc/testsuite/g++.dg/parse/assign1.C
@@ -0,0 +1,22 @@
+// PR c++/65525
+
+struct A
+{
+    int x;
+    char y; // Actually, short and bool (types smaller than int?) trigger this ICE too
+    // Also: the problem doesn't occur if you put the smaller type first, e.g. "char x; int y;"
+
+    A(int x) {} // custom ctor needed for ICE
+};
+
+int main()
+{
+    A a(0), x(1), y(2);
+
+    x = a; // OK
+    y = a; // OK
+    x = y = a; // ICE: sorry, unimplemented: unexpected AST of kind mem_ref
+    // internal compiler error: in potential_constant_expression_1, at cp/constexpr.c:4432
+
+    return 0;
+}