Fix ia64 abort while compiling gcc.c-torture/unsorted/logic.c.

	* regmove.c (optimize_reg_copy_1): If no REG_DEAD note, check for
	and handle REG_UNUSED note on insn.

From-SVN: r30813

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 505c7998d8311049b75e1fc9a6e69dad8d4b2291..76b18368294b53f76794f8429833e518ae615122 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 Mon Dec  6 15:12:14 1999  Jim Wilson  <wilson@cygnus.com>
 
+       * regmove.c (optimize_reg_copy_1): If no REG_DEAD note, check for
+       and handle REG_UNUSED note on insn.
+
        * combine.c (force_to_mode, case LSHIFTRT): New local inner_mask.  Set
        inner_mask instead of mask.
 

diff --git a/gcc/regmove.c b/gcc/regmove.c
index b4647816679fd2cfab2a9defd82317d5c2f7a79a..b78ea1614614710d95cd34f642c971b5fd00b02b 100644 (file)
--- a/gcc/regmove.c
+++ b/gcc/regmove.c
@@ -528,6 +528,14 @@ optimize_reg_copy_1 (insn, dest, src)
              REG_NOTES (insn) = note;
            }
 
+         /* DEST is also dead if INSN has a REG_UNUSED note for DEST.  */
+         if (! dest_death
+             && (dest_death = find_regno_note (insn, REG_UNUSED, dregno)))
+           {
+             PUT_REG_NOTE_KIND (dest_death, REG_DEAD);
+             remove_note (insn, dest_death);
+           }
+
          /* Put death note of DEST on P if we saw it die.  */
          if (dest_death)
            {