Fix ICE in tree-chkp-opt.c (PR tree-optimization/79631).

2017-03-09  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/79631
	* tree-chkp-opt.c (chkp_is_constant_addr): Call
	tree_int_cst_sign_bit just for INTEGER constants.
2017-03-09  Martin Liska  <mliska@suse.cz>

	PR tree-optimization/79631
	* gcc.target/i386/mpx/pr79631.c: New test.

From-SVN: r245998

gcc/ChangeLog

 2017-03-09  Martin Liska  <mliska@suse.cz>
 
+	PR tree-optimization/79631
+	* tree-chkp-opt.c (chkp_is_constant_addr): Call
+	tree_int_cst_sign_bit just for INTEGER constants.
+
+2017-03-09  Martin Liska  <mliska@suse.cz>
+
 	PR target/65705
 	PR target/69804
 	* toplev.c (process_options): Disable -fcheck-pointer-bounds with

gcc/testsuite/ChangeLog

 2017-03-09  Martin Liska  <mliska@suse.cz>
 
+	PR tree-optimization/79631
+	* gcc.target/i386/mpx/pr79631.c: New test.
+
+2017-03-09  Martin Liska  <mliska@suse.cz>
+
 	PR target/65705
 	PR target/69804
 	* gcc.target/i386/pr71458.c: Update scanned pattern.

gcc/testsuite/gcc.target/i386/mpx/pr79631.c

+/* { dg-do compile { target { ! x32 } } } */
+/* { dg-options "-fcheck-pointer-bounds -mmpx -O2" } */
+
+typedef struct { int _mp_size; } mpz_t[1];
+int a, b;
+void fn1()
+{
+  mpz_t c[1][b];
+  for (;;) {
+      int d = 0 >= 0 ? 0 == 0 ? c[0][0]->_mp_size ? -1 : 0 : 0 : 0,
+	  e = 0 >= 0 ? 0 == 0 ? c[1][1]->_mp_size ? -1 : 0 : 0 : 0;
+      if (d != e)
+	a++;
+  }
+}

gcc/tree-chkp-opt.c

@@ -239,9 +239,11 @@ chkp_is_constant_addr (const address_t &addr, int *sign)
     return false;
   else if (addr.pol[0].var)
     return false;
+  else if (TREE_CODE (addr.pol[0].cst) != INTEGER_CST)
+    return false;
   else if (integer_zerop (addr.pol[0].cst))
     *sign = 0;
-  else if  (tree_int_cst_sign_bit (addr.pol[0].cst))
+  else if (tree_int_cst_sign_bit (addr.pol[0].cst))
     *sign = -1;
   else
     *sign = 1;