(update_flow_info): When add REG_DEAD notes for dest of

last insn, add check for global_regs.

From-SVN: r13318

diff --git a/gcc/sched.c b/gcc/sched.c
index 71cf52f..3560711 100644 (file)
--- a/gcc/sched.c
+++ b/gcc/sched.c
@@ -4629,6 +4629,10 @@ update_flow_info (notes, first, last, orig_insn)
        dest = XEXP (dest, 0);
 
       if (GET_CODE (dest) == REG
+         /* Global registers are always live, so the code below does not
+            apply to them.  */
+         && (REGNO (dest) >= FIRST_PSEUDO_REGISTER
+             || ! global_regs[REGNO (dest)])
          && ! reg_overlap_mentioned_p (dest, SET_SRC (set)))
        {
          for (insn = PREV_INSN (last); ; insn = PREV_INSN (insn))