(move_deaths): When have a multi-reg hard register, if don't find a

note, then recur for each individual hard register.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@10225 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/combine.c b/gcc/combine.c
index d066a44..13eea3f 100644 (file)
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -10407,6 +10407,21 @@ move_deaths (x, from_cuid, to_insn, pnotes)
                               gen_rtx (REG, reg_raw_mode[i], i),
                               REG_NOTES (where_dead));
            }
+         /* If we didn't find any note, and we have a multi-reg hard
+            register, then to be safe we must check for REG_DEAD notes
+            for each register other than the first.  They could have
+            their own REG_DEAD notes lying around.  */
+         else if (note == 0 && regno < FIRST_PSEUDO_REGISTER
+                  && HARD_REGNO_NREGS (regno, GET_MODE (x)) > 1)
+           {
+             int ourend = regno + HARD_REGNO_NREGS (regno, GET_MODE (x));
+             int i;
+             rtx oldnotes = 0;
+
+             for (i = regno + 1; i < ourend; i++)
+               move_deaths (gen_rtx (REG, reg_raw_mode[i], i),
+                            from_cuid, to_insn, &oldnotes);
+           }
 
          if (note != 0 && GET_MODE (XEXP (note, 0)) == GET_MODE (x))
            {