re PR target/18511 (cc1plus segfaults when compiling libstdc++-v3/src/localename.cc)

	PR target/18511
	* reload1.c (emit_output_reload_insns): Check if OLD is a hard
	register before calling regno_clobbered_p.
	* reload.c: Update comment for regno_clobbered_p.

From-SVN: r92531

gcc/ChangeLog

+2004-12-23  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	PR target/18511
+	* reload1.c (emit_output_reload_insns): Check if OLD is a hard
+	register before calling regno_clobbered_p.
+	* reload.c: Update comment for regno_clobbered_p.
+
 2004-12-22  Richard Henderson  <rth@redhat.com>
 
 	* config/i386/i386.c (override_options): Respect user disable of

gcc/reload.c

@@ -6940,7 +6940,8 @@ find_inc_amount (rtx x, rtx inced)
 }
 
 /* Return 1 if register REGNO is the subject of a clobber in insn INSN.
-   If SETS is nonzero, also consider SETs.  */
+   If SETS is nonzero, also consider SETs.  REGNO must refer to a hard
+   register.  */
 
 int
 regno_clobbered_p (unsigned int regno, rtx insn, enum machine_mode mode,

gcc/reload1.c

@@ -6705,7 +6705,8 @@ emit_output_reload_insns (struct insn_chain *chain, struct reload *rl,
 	  || !(set = single_set (insn))
 	  || rtx_equal_p (old, SET_DEST (set))
 	  || !reg_mentioned_p (old, SET_SRC (set))
-	  || !regno_clobbered_p (REGNO (old), insn, rl->mode, 0))
+	  || !((REGNO (old) < FIRST_PSEUDO_REGISTER)
+	       && regno_clobbered_p (REGNO (old), insn, rl->mode, 0)))
 	gen_reload (old, reloadreg, rl->opnum,
 		    rl->when_needed);
     }