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backport: re PR c++/82159 (ICE: in assign_temp, at function.c:961) 

Backported from mainline
	2017-10-12  Jakub Jelinek  <jakub@redhat.com>

	PR c++/82159
	* expr.c (store_field): Don't optimize away bitsize == 0 store
	from CALL_EXPR with addressable return type.

	* g++.dg/opt/pr82159-2.C: New test.

From-SVN: r254181
This commit is contained in:
Jakub Jelinek 2017-10-27 22:35:06 +02:00 committed by Jakub Jelinek
parent 02a55dcbaf
commit 9dccb36f6b
4 changed files with 81 additions and 2 deletions
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6
gcc/ChangeLog
View File

@ -1,6 +1,12 @@
2017-10-27 Jakub Jelinek <jakub@redhat.com>
Backported from mainline
2017-10-12 Jakub Jelinek <jakub@redhat.com>
PR c++/82159
* expr.c (store_field): Don't optimize away bitsize == 0 store
from CALL_EXPR with addressable return type.
2017-09-21 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/81715

7
gcc/expr.c
View File

@ -6742,8 +6742,11 @@ store_field (rtx target, HOST_WIDE_INT bitsize, HOST_WIDE_INT bitpos,
return const0_rtx;
/* If we have nothing to store, do nothing unless the expression has
side-effects. */
if (bitsize == 0)
side-effects. Don't do that for zero sized addressable lhs of
calls. */
if (bitsize == 0
&& (!TREE_ADDRESSABLE (TREE_TYPE (exp))
|| TREE_CODE (exp) != CALL_EXPR))
return expand_expr (exp, const0_rtx, VOIDmode, EXPAND_NORMAL);
if (GET_CODE (target) == CONCAT)

5
gcc/testsuite/ChangeLog
View File

@ -1,6 +1,11 @@
2017-10-27 Jakub Jelinek <jakub@redhat.com>
Backported from mainline
2017-10-12 Jakub Jelinek <jakub@redhat.com>
PR c++/82159
* g++.dg/opt/pr82159-2.C: New test.
2017-10-04 Jakub Jelinek <jakub@redhat.com>
PR c++/82373

65
gcc/testsuite/g++.dg/opt/pr82159-2.C Normal file
View File

@ -0,0 +1,65 @@
// PR c++/82159
// { dg-do compile }
// { dg-options "" }
template <typename T> struct D { T e; };
struct F : D<int[0]> {
F(const F &);
};
struct G : F {
template <class T> G operator-(T);
};
template <class T> struct I {
typedef typename T::template J<I> ak;
};
template <class T> struct K { typename I<T>::ak an; };
struct H {
G l;
};
struct C {
~C();
};
template <class T> struct M : T {
template <typename U, typename V> M(U, V);
H h;
virtual void foo() { T::bar(&h); }
};
template <int, typename> class A;
template <class> struct B {
typedef int BT;
struct BC {};
template <class T> struct BD {
G g;
BD(BT, T n) : g(n.l - 0) {}
};
B(BT, BC);
};
template <typename> struct O;
template <int T, typename U>
struct O<B<A<T, U> > > : public B<A<T, U> >::BC {};
struct L : B<A<2, double> > {
struct P : C {
void bar(H *x) {
BT a;
BD<H>(a, *x);
}
};
template <typename U, typename V> L(U x, V n) : B(x, n) {}
int ll;
virtual int baz() { M<P>(this, ll); }
};
template <typename> class Q {
O<B<A<2, double> > > q;
virtual L baz() { L(0, q); }
};
template <template <class> class T> struct R {
R() { T<int>(); }
};
struct S {
template <class> class J : R<Q> {};
};
void foo() { K<S> c; }
int main() {
return 0;
}