1 files changed, 74 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/Wstringop-overflow-64.c b/gcc/testsuite/gcc.dg/Wstringop-overflow-64.c
new file mode 100644
index 0000000..88b9d29
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-64.c
@@ -0,0 +1,74 @@
+/* PR middle-end/92936 - missing warning on a past-the-end store to a PHI
+   { dg-do compile }
+   { dg-options "-O2 -Wall -Wno-array-bounds" } */
+
+typedef __SIZE_TYPE__ size_t;
+
+void* malloc (size_t);
+void* memset (void*, int, size_t);
+
+extern char a3[3], a5[5], a9[9];
+
+extern int cnd[];
+
+void* f2 (void)
+{
+  char *p0 = cnd[0] ? a3 : 0;
+  char *p1 = cnd[1] ? a5 : p0;
+
+  return memset (p1, 0, 6);   // { dg-warning "writing 6 bytes into a region of size 5" }
+}
+
+void* f3 (void)
+{
+  char *p0 = cnd[0] ? a3 : 0;
+  char *p1 = cnd[1] ? a5 : 0;
+  char *p2 = cnd[2] ? p0 : p1;
+
+  return memset (p2, 0, 6);   // { dg-warning "writing 6 bytes into a region of size 5" }
+}
+
+void* f3_2 (void)
+{
+  char *p0 = cnd[0] ? a3 : 0;
+  char *p1 = cnd[1] ? a5 : 0;
+  char *p2 = cnd[2] ? p1 : p0;
+
+  return memset (p2, 0, 6);   // { dg-warning "writing 6 bytes into a region of size 5" }
+}
+
+void* f3_3 (void)
+{
+  char *p0 = cnd[0] ? a5 : 0;
+  char *p1 = cnd[1] ? p0 : a5;
+  char *p2 = cnd[2] ? p1 : p0;
+
+  return memset (p2, 0, 6);   // { dg-warning "writing 6 bytes into a region of size 5" }
+}
+
+void* f4 (void)
+{
+  char *p0 = cnd[0] ? a3 : 0;
+  char *p1 = cnd[1] ? a5 : 0;
+  char *p2 = cnd[2] ? p0 : 0;
+  char *p3 = cnd[3] ? p1 : p2;
+
+  return memset (p3, 0, 6);   // { dg-warning "writing 6 bytes into a region of size 5" }
+}
+
+void* f9 (void)
+{
+  char *p0 = cnd[0] ? a5 : 0;
+  char *p1 = cnd[1] ? a5 + 1 : 0;
+  char *p2 = cnd[2] ? a5 + 2 : 0;
+  char *p3 = cnd[3] ? a5 + 3 : 0;
+  char *p4 = cnd[4] ? a5 + 4 : 0;
+
+  char *p5 = cnd[5] ? p0 : p1;
+  char *p6 = cnd[6] ? p5 : p2;
+  char *p7 = cnd[7] ? p6 : p3;
+  char *p8 = cnd[8] ? p7 : p4;
+  char *p9 = cnd[9] ? p8 : p5;
+
+  return memset (p9, 0, 6);   // { dg-warning "writing 6 bytes into a region of size 5" }
+}