[SH] Test case for PR 53886

[Oleg Endo]

Hello,

The attached patch adds a c.torture/compile test case for PR 53886.
The test case is a slightly modified version of the preprocessed example
in the PR (added forward decls to remove warnings).

Tested on rev 189361 with
make check-gcc RUNTESTFLAGS="compile.exp=pr53886.c 
--target_board=sh-sim\{-m2/-ml,-m2/-mb,-m2a/-mb,-m2a-single/-mb,-m4/-ml,
-m4/-mb,-m4-single/-ml,-m4-single/-mb,-m4a-single/-ml,-m4a-single/-mb}"

without the patch http://gcc.gnu.org/ml/gcc-patches/2012-07/msg00342.html
(fails) and with the patch (passes).

Cheers,
Oleg

testsuite/ChangeLog:

        target PR/53886
        * gcc.c-torture/compile/pr53886.c: New.

Index: gcc/testsuite/gcc.c-torture/compile/pr53886.c
===================================================================
--- gcc/testsuite/gcc.c-torture/compile/pr53886.c	(revision 0)
+++ gcc/testsuite/gcc.c-torture/compile/pr53886.c	(revision 0)
@@ -0,0 +1,68 @@
+/* PR target/53886  */
+typedef struct asn1_string_st ASN1_BIT_STRING;
+typedef struct bignum_st BIGNUM;
+typedef struct ec_group_st EC_GROUP;
+typedef struct ec_key_st EC_KEY;
+
+struct ec_key_st
+{
+  EC_GROUP *group;
+  BIGNUM *priv_key;
+  unsigned int enc_flag;
+}
+X9_62_PENTANOMIAL;
+typedef struct ec_privatekey_st
+{
+  ASN1_BIT_STRING *publicKey;
+}
+EC_PRIVATEKEY;
+
+extern EC_PRIVATEKEY* EC_PRIVATEKEY_new (void);
+extern void EC_PRIVATEKEY_free (EC_PRIVATEKEY*);
+extern unsigned char* CRYPTO_realloc (char*,int,const char*,int);
+
+int
+i2d_ECPrivateKey (EC_KEY * a, unsigned char **out)
+{
+  int ret = 0, ok = 0;
+  unsigned char *buffer = 0;
+  unsigned buf_len = 0, tmp_len;
+  EC_PRIVATEKEY *priv_key = 0;
+  if (a == 0 || a->group == 0 || a->priv_key == 0)
+    {
+      ERR_put_error (16, (192), ((3 | 64)),
+		     "",
+		     1234);
+      goto err;
+    }
+  if ((priv_key = EC_PRIVATEKEY_new ()) == 0)
+    {
+      ERR_put_error (16, (192), ((1 | 64)),
+		     "",
+		     1241);
+      goto err;
+    }
+  if (!(a->enc_flag & 0x002))
+    {
+      if (priv_key->publicKey == 0)
+	{
+	  goto err;
+	}
+      if (tmp_len > buf_len)
+	{
+	  unsigned char *tmp_buffer =
+	    CRYPTO_realloc ((char *) buffer, (int) tmp_len, "", 1293);
+	  buffer = tmp_buffer;
+	}
+    }
+  if ((ret = i2d_EC_PRIVATEKEY (priv_key, out)) == 0)
+    {
+    }
+  ok = 1;
+err:
+  if (buffer)
+    CRYPTO_free (buffer);
+  if (priv_key)
+    EC_PRIVATEKEY_free (priv_key);
+  return (ok ? ret : 0);
+}