From: Alan Modra <amodra@gmail.com>
Date: Mon, 25 Oct 2010 03:03:18 +0000 (+0000)
Subject: 	PR gas/12049
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e5940dffc561e32e0fa15b964a33aa3a7477237f;p=binutils-gdb.git

	PR gas/12049
	* write.c (relax_frag): Don't allow forward branches to temporarily
	becomde backward branches.
---

diff --git a/gas/ChangeLog b/gas/ChangeLog
index b3fb6253d61..020f927956f 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,9 @@
+2010-10-25  Alan Modra  <amodra@gmail.com>
+
+	PR gas/12049
+	* write.c (relax_frag): Don't allow forward branches to temporarily
+	becomde backward branches.
+
 2010-10-23  Mark Mitchell  <mark@codesourcery.com>
 
 	* config/obj-elf.c (elf_adjust_symtab): New.  Move group section
diff --git a/gas/write.c b/gas/write.c
index 080216a2409..4b6592f7aa8 100644
--- a/gas/write.c
+++ b/gas/write.c
@@ -2163,6 +2163,13 @@ relax_frag (segT segment, fragS *fragP, long stretch)
 	  if (stretch < 0
 	      || sym_frag->region == fragP->region)
 	    target += stretch;
+	  /* If we get here we know we have a forward branch.  This
+	     relax pass may have stretched previous instructions so
+	     far that omitting STRETCH would make the branch
+	     negative.  Don't allow this in case the negative reach is
+	     large enough to require a larger branch instruction.  */
+	  else if (target < address)
+	    target = fragP->fr_next->fr_address + stretch;
 	}
     }