loop.c (emit_iv_add_mult): Scan the entire insn list generated for the sequence,...

8
        * loop.c (emit_iv_add_mult): Scan the entire insn list generated
        for the sequence, recording base values.

From-SVN: r21208

diff --git a/gcc/loop.c b/gcc/loop.c
index 1932bdeb5bccbd2fcdc2d5cdc448b7e259284674..0171741e22b7ac07ea4b8ec40ad893f6a479ea70 100644 (file)
--- a/gcc/loop.c
+++ b/gcc/loop.c
@@ -6005,7 +6005,23 @@ emit_iv_add_mult (b, m, a, reg, insert_before)
 
   emit_insn_before (seq, insert_before);
 
-  record_base_value (REGNO (reg), b, 0);
+  /* It is entirely possible that the expansion created lots of new 
+     registers.  Iterate over the sequence we just created and 
+     record them all.  */
+
+  if (GET_CODE (seq) == SEQUENCE)
+    {
+      int i;
+      for (i = 0; i < XVECLEN (seq, 0); ++i)
+       {
+         rtx set = single_set (XVECEXP (seq, 0, i));
+         if (set && GET_CODE (SET_DEST (set)) == REG)
+           record_base_value (REGNO (SET_DEST (set)), SET_SRC (set), 0);
+       }
+    }
+  else if (GET_CODE (seq) == SET
+          && GET_CODE (SET_DEST (seq)) == REG)
+    record_base_value (REGNO (SET_DEST (seq)), SET_SRC (seq), 0);
 }
 \f
 /* Test whether A * B can be computed without