+Fri May 8 14:13:21 1998 H.J. Lu (hjl@gnu.org)
+
+ * reload1.c (emit_reload_insns): When performing expensive
+ optimizations, do not output the last reload insn if OLD is
+ not the dest of NSN and is in the src and is clobbered by INSN.
+
Fri May 8 13:59:31 1998 Paul Eggert <eggert@twinsun.com>
* dwarf2out.c: Don't assume that `.section ".text"' causes the
/* Output the last reload insn. */
if (! special)
- gen_reload (old, reloadreg, reload_opnum[j],
- reload_when_needed[j]);
+ {
+ rtx set;
+
+ /* Don't output the last reload if OLD is not the dest of
+ INSN and is in the src and is clobbered by INSN. */
+ if (! flag_expensive_optimizations
+ || GET_CODE (old) != REG
+ || !(set = single_set (insn))
+ || rtx_equal_p (old, SET_DEST (set))
+ || !reg_mentioned_p (old, SET_SRC (set))
+ || !regno_clobbered_p (REGNO (old), insn))
+ gen_reload (old, reloadreg, reload_opnum[j],
+ reload_when_needed[j]);
+ }
#ifdef PRESERVE_DEATH_INFO_REGNO_P
/* If final will look at death notes for this reg,