[PATCH, CHKP, i386, PR target/65184] Fix pass_by_reference for MS ABI for bounds

[Ilya Enkovich]

Hi,

Currenly ix86_pass_by_reference may return 1 for bounds if MS ABI is used.  This patch explicitly says bounds are never passed by reference.  Bootstrapped and tested on x86_64-unknown-linux-gnu.  OK for trunk?


Thanks,
Ilya
--
gcc/

2015-02-25  Ilya Enkovich  <ilya.enkovich@intel.com>

	PR target/65184
	* gcc/config/i386/i386.c (ix86_pass_by_reference) Bounds
	are never passed by reference.

gcc/testsuite/

2015-02-25  Ilya Enkovich  <ilya.enkovich@intel.com>

	PR target/65184
	* gcc.target/i386/pr65184.c: New.


diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 71a5b22..28242d7 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -7859,6 +7859,11 @@ ix86_pass_by_reference (cumulative_args_t cum_v, machine_mode mode,
 {
   CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
 
+  /* Bounds are never passed by reference.  */
+  if ((type && POINTER_BOUNDS_TYPE_P (type))
+      || POINTER_BOUNDS_MODE_P (mode))
+    return false;
+
   /* See Windows x64 Software Convention.  */
   if (TARGET_64BIT && (cum ? cum->call_abi : ix86_abi) == MS_ABI)
     {
diff --git a/gcc/testsuite/gcc.target/i386/pr65184.c b/gcc/testsuite/gcc.target/i386/pr65184.c
new file mode 100644
index 0000000..0355f29
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr65184.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target mpx } */
+/* { dg-options "-O2 -mabi=ms -fcheck-pointer-bounds -mmpx" } */
+
+void
+foo (int *a)
+{
+  if (a[0] != a[1] * 2333)
+    __builtin_abort ();
+}
+
+void
+bar (int *a)
+{
+  if (a[0] != a[1] * 2333)
+    __builtin_abort ();
+}