re PR rtl-optimization/41064 (build breakage for cris-elf building newlib, ICE…

re PR rtl-optimization/41064 (build breakage for cris-elf building newlib, ICE in extract_insn, from r150726)

	PR rtl-optimization/41064
	* reload1.c (reload_as_needed): Don't call extract_insn
	for known invalid replacements after calling
	validate_replace_rtx_group and verify_changes.

From-SVN: r150751

gcc/ChangeLog

+2009-08-14  Hans-Peter Nilsson  <hp@axis.com>
+
+	PR rtl-optimization/41064
+	* reload1.c (reload_as_needed): Don't call extract_insn
+	for known invalid replacements after calling
+	validate_replace_rtx_group and verify_changes.
+
 2009-08-14  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/41019

gcc/reload1.c

@@ -4312,10 +4312,15 @@ reload_as_needed (int live_known)
 			      n = verify_changes (0);
 
 			      /* We must also verify that the constraints
-				 are met after the replacement.  */
-			      extract_insn (p);
+				 are met after the replacement.  Make sure
+				 extract_insn is only called for an insn
+				 where the replacements were found to be
+				 valid so far. */
 			      if (n)
-				n = constrain_operands (1);
+				{
+				  extract_insn (p);
+				  n = constrain_operands (1);
+				}
 
 			      /* If the constraints were not met, then
 				 undo the replacement, else confirm it.  */