re PR middle-end/82095 (ICE in tree_nop_conversion at tree.c:11793 on ppc64le)

	PR middle-end/82095
	* varasm.c (categorize_decl_for_section): Use SECCAT_TBSS for TLS vars with
	NULL DECL_INITIAL.

	* gcc.dg/tls/pr82095.c: New test.

From-SVN: r251754

gcc/ChangeLog

+2017-09-06  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/82095
+	* varasm.c (categorize_decl_for_section): Use SECCAT_TBSS for TLS vars with
+	NULL DECL_INITIAL.
+
 2017-09-06  Richard Biener  <rguenther@suse.de>
 
 	* gimple-ssa-strength-reduction.c

gcc/testsuite/ChangeLog

+2017-09-06  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/82095
+	* gcc.dg/tls/pr82095.c: New test.
+
 2017-09-05  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/81768

gcc/testsuite/gcc.dg/tls/pr82095.c

+/* PR middle-end/82095 */
+/* { dg-do compile } */
+/* { dg-options "-Og -fno-tree-ccp" } */
+/* { dg-require-effective-target tls } */
+/* { dg-add-options tls } */
+
+static int b;
+static __thread int c;
+
+void
+foo (void)
+{
+  if (b)
+    if (c)
+      b = 1;
+}

gcc/varasm.c

@@ -6562,8 +6562,9 @@ categorize_decl_for_section (const_tree decl, int reloc)
       /* Note that this would be *just* SECCAT_BSS, except that there's
 	 no concept of a read-only thread-local-data section.  */
       if (ret == SECCAT_BSS
-	       || (flag_zero_initialized_in_bss
-		   && initializer_zerop (DECL_INITIAL (decl))))
+	  || DECL_INITIAL (decl) == NULL
+	  || (flag_zero_initialized_in_bss
+	      && initializer_zerop (DECL_INITIAL (decl))))
 	ret = SECCAT_TBSS;
       else
 	ret = SECCAT_TDATA;