toolchain/gcc/4.3.2: use what really got committed upstream for PR39076

ChangeLog (regrename) 

     gcc/ 

     * regrename.c: Unshare RTX earlier in build_def_use to avoid 

     corruption of dup_loc. 

Index: gcc/regrename.c

===================================================================

--- a/gcc/regrename.c	(revision 197947)

+++ b/gcc/regrename.c	(working copy)

@@ -783,6 +783,10 @@ build_def_use (basic_block bb)

 		recog_data.operand_type[i] = OP_INOUT;

 	    }

+	  /* Unshare dup_loc RTL */

+	  for (i = 0; i < recog_data.n_dups; i++)

+	    *recog_data.dup_loc[i] = copy_rtx(*recog_data.dup_loc[i]);

+

 	  /* Step 1: Close chains for which we have overlapping reads.  */

 	  for (i = 0; i < n_ops; i++)

 	    scan_rtx (insn, recog_data.operand_loc[i],

@@ -813,7 +817,7 @@ build_def_use (basic_block bb)

 		    OP_IN, 0);

 	  for (i = 0; i < recog_data.n_dups; i++)

-	    *recog_data.dup_loc[i] = copy_rtx (old_dups[i]);

+	    *recog_data.dup_loc[i] = old_dups[i];

 	  for (i = 0; i < n_ops; i++)

 	    *recog_data.operand_loc[i] = old_operands[i];

 	  if (recog_data.n_dups)

--- gcc-4.3.2.orig/gcc/regrename.c	2007-09-09 04:23:47.000000000 +0200

+++ gcc-4.3.2/gcc/regrename.c	2009-02-05 10:23:59.000000000 +0100

@@ -813,7 +813,7 @@

 		    OP_IN, 0);

 	  for (i = 0; i < recog_data.n_dups; i++)

-	    *recog_data.dup_loc[i] = copy_rtx (old_dups[i]);

+	    *recog_data.dup_loc[i] = old_dups[i];

 	  for (i = 0; i < n_ops; i++)

 	    *recog_data.operand_loc[i] = old_operands[i];

 	  if (recog_data.n_dups)