1 files changed, 124 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/Wstringop-overflow-7.c b/gcc/testsuite/gcc.dg/Wstringop-overflow-7.c
new file mode 100644
index 0000000..cb2addf3
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-7.c
@@ -0,0 +1,124 @@
+/* Test to verify that --param ssa_name_def_chain_limit can be used to
+   limit the maximum number of SSA_NAME assignments the warning follows.
+   { dg-do compile }
+   { dg-options "-O2 -Wall -Wno-array-bounds --param ssa-name-def-chain-limit=5" }  */
+
+#define NOIPA __attribute__ ((noipa))
+
+void* memset (void*, int, __SIZE_TYPE__);
+
+char a9[9];
+
+void sink (const char*, ...);
+
+NOIPA void g2 (int i)
+{
+  if (i < 1) i = 1;
+
+  char *p0 = a9;
+  char *p1 = p0 + i;
+  char *p2 = p1 + i;
+
+  sink (p0, p1, p2);
+
+  memset (p2, 0, 8);          // { dg-warning "\\\[-Wstringop-overflow" }
+}
+
+NOIPA void g3 (int i)
+{
+  if (i < 1) i = 1;
+
+  char *p0 = a9;
+  char *p1 = p0 + i;
+  char *p2 = p1 + i;
+  char *p3 = p2 + i;
+
+  sink (p0, p1, p2, p3);
+
+  memset (p3, 0, 7);          // { dg-warning "\\\[-Wstringop-overflow" }
+}
+
+NOIPA void g4 (int i)
+{
+  if (i < 1) i = 1;
+
+  char *p0 = a9;
+  char *p1 = p0 + i;
+  char *p2 = p1 + i;
+  char *p3 = p2 + i;
+  char *p4 = p3 + i;
+
+  sink (p0, p1, p2, p3, p4);
+
+  memset (p4, 0, 6);          // { dg-warning "\\\[-Wstringop-overflow" }
+}
+
+NOIPA void g5 (int i)
+{
+  if (i < 1) i = 1;
+
+  char *p0 = a9;
+  char *p1 = p0 + i;
+  char *p2 = p1 + i;
+  char *p3 = p2 + i;
+  char *p4 = p3 + i;
+  char *p5 = p4 + i;
+
+  sink (p0, p1, p2, p3, p4, p5);
+
+  memset (p5, 0, 5);          // { dg-warning "\\\[-Wstringop-overflow" }
+}
+
+NOIPA void g6 (int i)
+{
+  if (i < 1) i = 1;
+
+  char *p0 = a9;
+  char *p1 = p0 + i;
+  char *p2 = p1 + i;
+  char *p3 = p2 + i;
+  char *p4 = p3 + i;
+  char *p5 = p4 + i;
+  char *p6 = p5 + i;
+
+  sink (p0, p1, p2, p3, p4, p5, p6);
+
+  memset (p6, 0, 4);
+}
+
+NOIPA void g7 (int i)
+{
+  if (i < 1) i = 1;
+
+  char *p0 = a9;
+  char *p1 = p0 + i;
+  char *p2 = p1 + i;
+  char *p3 = p2 + i;
+  char *p4 = p3 + i;
+  char *p5 = p4 + i;
+  char *p6 = p5 + i;
+  char *p7 = p6 + i;
+
+  sink (p0, p1, p2, p3, p4, p5, p6, p7);
+
+  memset (p7, 0, 4);
+}
+
+NOIPA void g8 (int i)
+{
+  if (i < 1) i = 1;
+
+  char *p0 = a9;
+  char *p1 = p0 + i;
+  char *p2 = p1 + i;
+  char *p3 = p2 + i;
+  char *p4 = p3 + i;
+  char *p5 = p4 + i;
+  char *p6 = p5 + i;
+  char *p7 = p6 + i;
+  char *p8 = p7 + i;
+
+  sink (p0, p1, p2, p3, p4, p5, p6, p7, p8);
+
+  memset (p8, 0, 2);
+}