Allow negative offset for UNSPEC_DTPOFF/UNSPEC_NTPOFF

gcc/

	PR target/54445
	* config/i386/predicates.md (x86_64_immediate_operand): Allow
	negative offset for UNSPEC_DTPOFF/UNSPEC_NTPOFF.

gcc/testsuite/

	PR target/54445
	* gcc.target/i386/pr54445-1.c: New file.
	* gcc.target/i386/pr54445-2.c: Likewise.

From-SVN: r191230

gcc/ChangeLog

+2012-09-12  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/54445
+	* config/i386/predicates.md (x86_64_immediate_operand): Allow
+	negative offset for UNSPEC_DTPOFF/UNSPEC_NTPOFF.
+
 2012-09-12  Jan Hubicka  <jh@suse.cz>
 
 	* common.opt (flto-partition): Add "max".

gcc/config/i386/predicates.md

@@ -201,8 +201,7 @@
 		{
 		case UNSPEC_DTPOFF:
 		case UNSPEC_NTPOFF:
-		  if (offset > 0
-		      && trunc_int_for_mode (offset, SImode) == offset)
+		  if (trunc_int_for_mode (offset, SImode) == offset)
 		    return true;
 		}
 	      break;

gcc/testsuite/ChangeLog

+2012-09-12  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/54445
+	* gcc.target/i386/pr54445-1.c: New file.
+	* gcc.target/i386/pr54445-2.c: Likewise.
+
 2012-09-12  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/54225

gcc/testsuite/gcc.target/i386/pr54445-1.c

+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+__thread unsigned char tls_array[64];
+
+unsigned char
+__attribute__ ((noinline))
+tls_array_lookup_with_negative_constant(long long int position) {
+  return tls_array[position - 1];
+}
+
+int
+main ()
+{
+  int i;
+
+  for (i = 0; i < sizeof (tls_array) / sizeof (tls_array[0]); i++)
+    tls_array[i] = i;
+
+  for (i = 0; i < sizeof (tls_array) / sizeof (tls_array[0]); i++)
+    if (i != tls_array_lookup_with_negative_constant (i + 1))
+      __builtin_abort ();
+  return 0;
+}

gcc/testsuite/gcc.target/i386/pr54445-2.c

+/* { dg-do compile { target { *-*-linux* && { ! { ia32 } } } } } */
+/* { dg-options "-O2 -fno-pic" } */
+
+__thread unsigned char tls_array[64];
+
+unsigned char
+tls_array_lookup_with_negative_constant(long long int position) {
+  return tls_array[position - 1];
+}
+
+/* { dg-final { scan-assembler "mov(b|zbl)\[ \t\](%fs:)?tls_array@tpoff-1\\(%" } } */