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[lra] a patch to fix a testsuite regression on SPARC.

Message ID 4F468B33.4080604@redhat.com
State New
Headers show

Commit Message

Vladimir Makarov Feb. 23, 2012, 6:53 p.m. UTC 
The following patch fixes a few SPARC GCC testsuite regressions.

The patch was successfully bootstrapped on x86/x86-64.

Committed as rev. 184512.

2012-02-23  Vladimir Makarov <vmakarov@redhat.com>

         * lra-eliminations.c (update_reg_eliminate): Make hard register
         unallocatable when we make it a result of the elimination.
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Patch

Index: lra-eliminations.c
===================================================================
--- lra-eliminations.c	(revision 184177)
+++ lra-eliminations.c	(working copy)
@@ -1103,6 +1103,9 @@  update_reg_eliminate (bitmap insns_with_
 	      if (lra_dump_file != NULL)
 		fprintf (lra_dump_file, "    Using elimination %d to %d now\n",
 			 ep1->from, ep1->to);
+	      /* Prevent the hard register into which we eliminate now
+		 from the usage for pseudos.  */
+	      SET_HARD_REG_BIT (temp_hard_reg_set, ep1->to);
 	      gcc_assert (ep1->previous_offset == 0);
 	      ep1->previous_offset = ep->offset;
 	    }