* config/linux.h (ASM_COMMENT_START): Remove from here,

[pf3gnuchains/gcc-fork.git] / gcc / sched.c

diff --git a/gcc/sched.c b/gcc/sched.c
index a44002e..a51d128 100644 (file)
--- a/gcc/sched.c
+++ b/gcc/sched.c
@@ -264,7 +264,7 @@ static rtx dead_notes;
    The transition (R->S) is implemented in the scheduling loop in
    `schedule_block' when the best insn to schedule is chosen.
    The transition (R->Q) is implemented in `schedule_select' when an
-   insn is found to to have a function unit conflict with the already
+   insn is found to have a function unit conflict with the already
    committed insns.
    The transitions (P->R and P->Q) are implemented in `schedule_insn' as
    insns move from the ready list to the scheduled list.
@@ -1683,7 +1683,7 @@ sched_analyze (head, tail)
 
              /* Add a pair of fake REG_NOTEs which we will later
                 convert back into a NOTE_INSN_SETJMP note.  See
-                reemit_notes for why we use a pair of of NOTEs.  */
+                reemit_notes for why we use a pair of NOTEs.  */
 
              REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_DEAD,
                                                    GEN_INT (0),
@@ -3655,6 +3655,13 @@ new_insn_dead_notes (pat, insn, last, orig_insn)
 
   if (GET_CODE (dest) == REG)
     {
+      /* If the original insn already used this register, we may not add new
+         notes for it.  One example for a split that needs this test is
+        when a multi-word memory access with register-indirect addressing
+        is split into multiple memory accesses with auto-increment and
+        one adjusting add instruction for the address register.  */
+      if (reg_referenced_p (dest, PATTERN (orig_insn)))
+       return;
       for (tem = last; tem != insn; tem = PREV_INSN (tem))
        {
          if (GET_RTX_CLASS (GET_CODE (tem)) == 'i'