(find_dead_or_set_registers): Only kill spill regs after label made

before jump2.

From-SVN: r11778

diff --git a/gcc/reorg.c b/gcc/reorg.c
index a9101a9..11e5fc7 100644 (file)
--- a/gcc/reorg.c
+++ b/gcc/reorg.c
@@ -133,6 +133,10 @@ Boston, MA 02111-1307, USA.  */
 /* Import list of registers used as spill regs from reload.  */
 extern HARD_REG_SET used_spill_regs;
 
+/* Import highest label used in function at end of reload.  */
+extern int max_label_num_after_reload;
+
+
 #ifdef DELAY_SLOTS
 
 #define obstack_chunk_alloc xmalloc
@@ -2468,11 +2472,14 @@ find_dead_or_set_registers (target, res, jump_target, jump_count, set, needed)
          AND_COMPL_HARD_REG_SET (res->regs, pending_dead_regs);
          CLEAR_HARD_REG_SET (pending_dead_regs);
 
-         /* All spill registers are dead at a label, so kill all of the
-            ones that aren't needed also.  */
-         COPY_HARD_REG_SET (scratch, used_spill_regs);
-         AND_COMPL_HARD_REG_SET (scratch, needed.regs);
-         AND_COMPL_HARD_REG_SET (res->regs, scratch);
+         if (CODE_LABEL_NUMBER (insn) < max_label_num_after_reload)
+           {
+             /* All spill registers are dead at a label, so kill all of the
+                ones that aren't needed also.  */
+             COPY_HARD_REG_SET (scratch, used_spill_regs);
+             AND_COMPL_HARD_REG_SET (scratch, needed.regs);
+             AND_COMPL_HARD_REG_SET (res->regs, scratch);
+           }
          continue;
 
        case BARRIER: