|| TREE_CODE (dest) == MEM_REF)
{
tree ref = TREE_OPERAND (dest, 0);
+ tree reftype = TREE_TYPE (ref);
+ if (TREE_CODE (dest) == MEM_REF && TREE_CODE (reftype) == POINTER_TYPE)
+ {
+ /* Give up for MEM_REFs of vector types; those may be synthesized
+ from multiple assignments to consecutive data members. See PR
+ 93200.
+ FIXME: Deal with this more generally, e.g., by marking up such
+ MEM_REFs at the time they're created. */
+ reftype = TREE_TYPE (reftype);
+ if (TREE_CODE (reftype) == VECTOR_TYPE)
+ return NULL_TREE;
+ }
tree off = TREE_OPERAND (dest, 1);
if (tree size = compute_objsize (ref, ostype, pdecl, poff))
{
--- /dev/null
+/* PR middle-end/93200 - spurious -Wstringop-overflow due to assignment
+ vectorization to multiple members
+ { dg-do compile }
+ { dg-options "-O3 -Wall" } */
+
+typedef __INT8_TYPE__ int8_t;
+typedef __INT16_TYPE__ int16_t;
+typedef __INT32_TYPE__ int32_t;
+typedef __INT64_TYPE__ int64_t;
+
+struct A { char b, c; };
+struct B1A { int8_t i8; struct A a; };
+struct B2A { int16_t i16; struct A a; };
+struct B3A { int16_t i16; int8_t i8; struct A a; };
+struct B4A { int64_t i64; struct A a; };
+
+void ba1 (struct B1A *p)
+{
+ p->a.b = 0; p->a.c = 1;
+}
+
+void b2a (struct B2A *p)
+{
+ /* This results in:
+ vector(2) char *vectp.14_6 = &p_2(D)->a.b;
+ MEM <vector(2) char> [(char *)vectp.14_6] = { 4, 5 }; */
+
+ p->a.b = 4; // { dg-bogus "-Wstringop-overflow" }
+ p->a.c = 5;
+}
+
+void b3a (struct B3A *p)
+{
+ p->a.b = 4; p->a.c = 5;
+}
+
+void b4a (struct B4A *p)
+{
+ /* This results in:
+ vector(2) char *vectp.22_6 = &p_2(D)->a.b;
+ MEM <vector(2) char> [(char *)vectp.22_6] = { 6, 7 }; */
+
+ p->a.b = 6; // { dg-bogus "-Wstringop-overflow" }
+ p->a.c = 7;
+}
+
+
+struct Aa { char a[2], b[2]; };
+struct B1Aa { int8_t i8; struct Aa a; };
+struct B2Aa { int16_t i16; struct Aa a; };
+struct B3Aa { int16_t i16; int8_t i8; struct Aa a; };
+struct B4Aa { int64_t i64; struct Aa a; };
+
+void b1aa (struct B1Aa *p)
+{
+ p->a.a[0] = 0; p->a.a[1] = 1;
+ p->a.b[0] = 0; p->a.b[1] = 1;
+}
+
+void b2aa (struct B2Aa *p)
+{
+ p->a.a[0] = 2; p->a.a[1] = 3;
+ p->a.b[0] = 2; p->a.b[1] = 3;
+}
+
+void b3aa (struct B3Aa *p)
+{
+ p->a.a[0] = 4; p->a.a[1] = 5;
+ p->a.b[0] = 4; p->a.b[1] = 5;
+}
+
+void b4aa (struct B4Aa *p)
+{
+ /* This results in:
+ vector(4) char *vectp.36_8 = &p_2(D)->a.a[0];
+ MEM <vector(4) char> [(char *)vectp.36_8] = { 6, 7, 6, 7 }; */
+
+ p->a.a[0] = 6; p->a.a[1] = 7;
+ p->a.b[0] = 6; p->a.b[1] = 7;
+}