(try_combine): Save DEST of NI2PAT before calling recog_for_combine,

which might make it a PARALLEL.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@2411 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/combine.c b/gcc/combine.c
index 9dd969f..5476599 100644 (file)
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -1676,11 +1676,13 @@ try_combine (i3, i2, i1)
           && ! find_reg_note (i3, REG_UNUSED,
                               SET_DEST (XVECEXP (newpat, 0, 0))))
     {
+      rtx ni2dest;
+
       newi2pat = XVECEXP (newpat, 0, 0);
+      ni2dest = SET_DEST (XVECEXP (newpat, 0, 0));
       newpat = XVECEXP (newpat, 0, 1);
       SUBST (SET_SRC (newpat),
-            gen_lowpart_for_combine (GET_MODE (SET_SRC (newpat)),
-                                     SET_DEST (newi2pat)));
+            gen_lowpart_for_combine (GET_MODE (SET_SRC (newpat)), ni2dest));
       i2_code_number = recog_for_combine (&newi2pat, i2, &new_i2_notes);
       if (i2_code_number >= 0)
        insn_code_number = recog_for_combine (&newpat, i3, &new_i3_notes);
@@ -1717,7 +1719,7 @@ try_combine (i3, i2, i1)
               insn = NEXT_INSN (insn))
            {
              if (GET_RTX_CLASS (GET_CODE (insn)) == 'i'
-                 && reg_referenced_p (SET_DEST (newi2pat), PATTERN (insn)))
+                 && reg_referenced_p (ni2dest, PATTERN (insn)))
                {
                  for (link = LOG_LINKS (insn); link;
                       link = XEXP (link, 1))