From: Jakub Jelinek <jakub@redhat.com>
Date: Tue, 7 Dec 2010 15:12:45 +0000 (+0100)
Subject: backport: re PR target/45870 (note: non-delegitimized UNSPEC 5 found (-O1 -g))
X-Git-Tag: releases/gcc-4.5.2~60
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=73c4c7b85da05ffc21e2ecd8a7fc7a860a38a910;p=thirdparty%2Fgcc.git

backport: re PR target/45870 (note: non-delegitimized UNSPEC 5 found (-O1 -g))

	Backport from mainline
	2010-11-19  Jakub Jelinek  <jakub@redhat.com>

	PR target/45870
	* dwarf2out.c (const_ok_for_output_1): Don't complain about
	non-delegitimized TLS UNSPECs.

From-SVN: r167541
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index aac24f2a97f3..838677795a0c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,12 @@
 2010-12-07  Jakub Jelinek  <jakub@redhat.com>
 
 	Backport from mainline
+	2010-11-19  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/45870
+	* dwarf2out.c (const_ok_for_output_1): Don't complain about
+	non-delegitimized TLS UNSPECs.
+
 	2010-11-18  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/46534
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index 802ba3d6d37c..2df1bd6aa9a3 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -12888,11 +12888,18 @@ const_ok_for_output_1 (rtx *rtlp, void *data ATTRIBUTE_UNUSED)
       /* If delegitimize_address couldn't do anything with the UNSPEC, assume
 	 we can't express it in the debug info.  */
 #ifdef ENABLE_CHECKING
-      inform (current_function_decl
-	      ? DECL_SOURCE_LOCATION (current_function_decl)
-	      : UNKNOWN_LOCATION,
-	      "non-delegitimized UNSPEC %d found in variable location",
-	      XINT (rtl, 1));
+      /* Don't complain about TLS UNSPECs, those are just too hard to
+	 delegitimize.  */
+      if (XVECLEN (rtl, 0) != 1
+	  || GET_CODE (XVECEXP (rtl, 0, 0)) != SYMBOL_REF
+	  || SYMBOL_REF_DECL (XVECEXP (rtl, 0, 0)) == NULL
+	  || TREE_CODE (SYMBOL_REF_DECL (XVECEXP (rtl, 0, 0))) != VAR_DECL
+	  || !DECL_THREAD_LOCAL_P (SYMBOL_REF_DECL (XVECEXP (rtl, 0, 0))))
+	inform (current_function_decl
+		? DECL_SOURCE_LOCATION (current_function_decl)
+		: UNKNOWN_LOCATION,
+		"non-delegitimized UNSPEC %d found in variable location",
+		XINT (rtl, 1));
 #endif
       expansion_failed (NULL_TREE, rtl,
 			"UNSPEC hasn't been delegitimized.\n");