gcc33/nov74176.diff

Novell #74176

This is for PR 20286, which is an IA-64 abort with a testcase that
redefines an external __thread variable as static __thread.

This testcase hits the abort in ia64_encode_section_info which aborts if
a thread variable changes state.  This is intended to catch accidental
transitions between thread data and small data.  In this case, it is
accidentally catching an internal TLS transition from INITIAL_EXEC to
LOCAL_EXEC, which is an allowable transition.  This patch fixes the
problem by only calling the abort if either state involves small data.

This patch applies only to gcc-3.3.  This was fixed in gcc-3.4 by using
default_encode_section_info, which is not present in gcc-3.3.  Since
pulling all of this into gcc-3.3 is a rather large patch, including
non-IA-64 changes, I believe it is better to just add a gcc-3.3 specific
fix to the ia64.c file.

This was tested with a bootstrap and make check with and without the
patch on ia64-linux using the top of the gcc-3.3 branch.  There were no
regressions.

2005-03-23  James E Wilson  <wilson@specifixinc.com>

	PR target/20286.
	* config/ia64/ia64.c (ia64_encode_section_info): Only abort if encoding
	or symbol_str[1] is 's'.

Index: gcc/config/ia64/ia64.c
===================================================================
--- gcc/config/ia64/ia64.c.orig	2009-11-20 13:06:08.000000000 +0100
+++ gcc/config/ia64/ia64.c	2009-11-20 13:06:32.000000000 +0100
@@ -7364,7 +7364,8 @@ ia64_encode_section_info (decl, first)
 	  if (encoding == symbol_str[1])
 	    return;
 	  /* ??? Sdata became thread or thread becaome not thread.  Lose.  */
-	  abort ();
+	  if (encoding == 's' || symbol_str[1] == 's')
+	    abort ();
 	}
 
       len = strlen (symbol_str);