re PR target/77991 (ICE on x32 in plus_constant, at explow.c:87)

	PR target/77991
	* config/i386/i386.c (legitimize_tls_address)
	<case TLS_MODEL_INITIAL_EXEC>: For TARGET_64BIT || TARGET_ANY_GNU_TLS
	convert dest to Pmode if different than Pmode.

testsuite/ChangeLog:

	PR target/77991
	* gcc.target/i386/pr77991.c: New test.

From-SVN: r241308

gcc/ChangeLog

+2016-10-18  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/77991
+	* config/i386/i386.c (legitimize_tls_address)
+	<case TLS_MODEL_INITIAL_EXEC>: For TARGET_64BIT || TARGET_ANY_GNU_TLS
+	convert dest to Pmode if different than Pmode.
+
 2016-10-18  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
 
 	PR tree-optimization/77916

gcc/config/i386/i386.c

@@ -16357,7 +16357,9 @@ legitimize_tls_address (rtx x, enum tls_model model, bool for_mov)
 	  base = get_thread_pointer (tp_mode,
 				     for_mov || !TARGET_TLS_DIRECT_SEG_REFS);
 	  off = force_reg (tp_mode, off);
-	  return gen_rtx_PLUS (tp_mode, base, off);
+	  dest = gen_rtx_PLUS (tp_mode, base, off);
+	  if (tp_mode != Pmode)
+	    dest = convert_to_mode (Pmode, dest, 1);
 	}
       else
 	{

gcc/testsuite/ChangeLog

+2016-10-18  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/77991
+	* gcc.target/i386/pr77991.c: New test.
+
 2016-10-18  Matthew Fortune  <matthew.fortune@imgtec.com>
 
 	* lib/gcc-dg.exp: Set gcc_force_conventional_output whenever
@@ -5,8 +10,7 @@
 
 2016-10-18  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
 
-	* gcc.dg/sso/sso.exp: Return early if not 
-	effective_target_int32.
+	* gcc.dg/sso/sso.exp: Return early if not effective_target_int32.
 
 2016-10-18  Richard Biener  <rguenther@suse.de>
 

gcc/testsuite/gcc.target/i386/pr77991.c

+/* { dg-do compile { target { ! ia32 } } } */
+/* { dg-require-effective-target maybe_x32 } */
+/* { dg-options "-O2 -mx32 -maddress-mode=short" } */
+
+struct rcu_reader_data
+{
+  unsigned ctr;
+  _Bool waiting;
+}
+
+extern __thread rcu_reader;
+
+void rcu_read_lock()
+{
+  struct rcu_reader_data *x = &rcu_reader;
+  _Bool val = 0;
+
+  __atomic_store(&x->waiting, &val, 0);
+}