reorg.c (redundant_insn_p): Stop searching for a redundant insn if an INSN or JUMP_IN...

	* reorg.c (redundant_insn_p): Stop searching for a redundant
	insn if an INSN or JUMP_INSN with delayed effects is
	encountered.

From-SVN: r3989

diff --git a/gcc/reorg.c b/gcc/reorg.c
index 787d9ff2b107ff6e80a95bcd9d8c3c2b8ca079fd..a125a824ce73c09bf41d5de9fdaf3d2d8acd0d79 100644 (file)
--- a/gcc/reorg.c
+++ b/gcc/reorg.c
@@ -1729,11 +1729,27 @@ redundant_insn_p (insn, target, delay_list)
 
       if (GET_CODE (pat) == SEQUENCE)
        {
-         /* Stop for a CALL and its delay slots because it difficult to track
-            its resource needs correctly.  */
+         /* Stop for a CALL and its delay slots because it is difficult to
+            track its resource needs correctly.  */
          if (GET_CODE (XVECEXP (pat, 0, 0)) == CALL_INSN)
            return 0;
 
+         /* Stop for an INSN or JUMP_INSN with delayed effects and its delay
+            slots because it is difficult to track its resource needs 
+            correctly.  */
+
+#ifdef INSN_SETS_ARE_DELAYED
+         if (INSN_SETS_ARE_DELAYED (XVECEXP (pat, 0, 0)))
+           return 0; 
+#endif
+
+#ifdef INSN_REFERENCES_ARE_DELAYED
+         if (INSN_REFERENCES_ARE_DELAYED (XVECEXP (pat, 0, 0)))
+           return 0; 
+#endif
+
+         /* See if any of the insns in the delay slot match, updating
+            resource requirements as we go.  */
          for (i = XVECLEN (pat, 0) - 1; i > 0; i--)
            if (GET_CODE (XVECEXP (pat, 0, i)) == GET_CODE (insn)
                && rtx_equal_p (PATTERN (XVECEXP (pat, 0, i)), ipat))
@@ -1816,6 +1832,19 @@ redundant_insn_p (insn, target, delay_list)
          if (GET_CODE (XVECEXP (pat, 0, 0)) == CALL_INSN)
            return 0;
 
+         /* If this this is an INSN or JUMP_INSN with delayed effects, it
+            is hard to track the resource needs properly, so give up.  */
+
+#ifdef INSN_SETS_ARE_DELAYED
+         if (INSN_SETS_ARE_DELAYED (XVECEXP (pat, 0, 0)))
+           return 0; 
+#endif
+
+#ifdef INSN_REFERENCES_ARE_DELAYED
+         if (INSN_REFERENCES_ARE_DELAYED (XVECEXP (pat, 0, 0)))
+           return 0; 
+#endif
+
          /* See if any of the insns in the delay slot match, updating
             resource requirements as we go.  */
          for (i = XVECLEN (pat, 0) - 1; i > 0; i--)