re PR c/68337 ([MPX] memcpy() for arrays with function pointers results in huge resource usage and binaries)

gcc/

	PR c/68337
	* gimple-fold.c: Include ipa-chkp.h.
	(gimple_fold_builtin_memory_op): Don't fold call if we
	are going to instrument it and it may copy pointers.

gcc/testsuite/

	PR c/68337
	* gcc.target/i386/mpx/pr68337-1.c: New test.
	* gcc.target/i386/mpx/pr68337-2.c: New test.

From-SVN: r230796

2 files changed, 41 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/i386/mpx/pr68337-1.c b/gcc/testsuite/gcc.target/i386/mpx/pr68337-1.c
new file mode 100644
index 0000000..3f8d79d
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/mpx/pr68337-1.c
@@ -0,0 +1,32 @@
+/* { dg-do run } */
+/* { dg-options "-fcheck-pointer-bounds -mmpx" } */
+
+#include "mpx-check.h"
+
+#define N 2
+
+extern void abort ();
+
+static int
+mpx_test (int argc, const char **argv)
+{
+  char ** src = (char **)malloc (sizeof (char *) * N);
+  char ** dst = (char **)malloc (sizeof (char *) * N);
+  int i;
+
+  for (i = 0; i < N; i++)
+    src[i] = __bnd_set_ptr_bounds (argv[0] + i, i + 1);
+
+  __builtin_memcpy(dst, src, sizeof (char *) * N);
+
+  for (i = 0; i < N; i++)
+    {
+      char *p = dst[i];
+      if (p != argv[0] + i
+	  || __bnd_get_ptr_lbound (p) != p
+	  || __bnd_get_ptr_ubound (p) != p + i)
+	abort ();
+    }
+
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.target/i386/mpx/pr68337-2.c b/gcc/testsuite/gcc.target/i386/mpx/pr68337-2.c
new file mode 100644
index 0000000..8845cca
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/mpx/pr68337-2.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+/* { dg-options "-fcheck-pointer-bounds -mmpx" } */
+/* { dg-final { scan-assembler-not "memcpy" } } */
+
+void
+test (void *dst, void *src)
+{
+  __builtin_memcpy (dst, src, sizeof (char *) / 2);
+}