except.c: Revert change of 2004-05-26.

	* except.c: Revert change of 2004-05-26.
	* config/i386/i386.md: Revert change of 2004-05-27.

From-SVN: r82349

gcc/ChangeLog

 2004-05-27  Bryce McKinlay  <mckinlay@redhat.com>
 
+	* except.c: Revert change of 2004-05-26.
+	* config/i386/i386.md: Revert change of 2004-05-27.
+
+2004-05-27  Bryce McKinlay  <mckinlay@redhat.com>
+
 	* configure.ac: Remove --enable-tree-browser option.
 	Define TREEBROWSER when ac_tree_checking is defined.
 	* configure: Rebuilt.

gcc/config/i386/i386.md

@@ -137,12 +137,11 @@
 
    ; REP instruction
    (UNSPEC_REP			75)
-
-   (UNSPEC_EH_RETURN		76)
   ])
 
 (define_constants
   [(UNSPECV_BLOCKAGE		0)
+   (UNSPECV_EH_RETURN		13)
    (UNSPECV_EMMS		31)
    (UNSPECV_LDMXCSR		37)
    (UNSPECV_STMXCSR		40)
@@ -13881,7 +13880,6 @@
   ""
 {
   rtx tmp, sa = EH_RETURN_STACKADJ_RTX, ra = operands[0];
-  rtx jmp;
 
   /* Tricky bit: we write the address of the handler to which we will
      be returning into someone else's stack frame, one word below the
@@ -13892,19 +13890,16 @@
   emit_move_insn (tmp, ra);
 
   if (Pmode == SImode)
-    jmp = emit_jump_insn (gen_eh_return_si (sa));
+    emit_insn (gen_eh_return_si (sa));
   else
-    jmp = emit_jump_insn (gen_eh_return_di (sa));
-  REG_NOTES (jmp) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO, const0_rtx,
-                                     REG_NOTES (jmp));
+    emit_insn (gen_eh_return_di (sa));
   emit_barrier ();
   DONE;
 })
 
 (define_insn_and_split "eh_return_si"
-  [(set (pc) 
-        (unspec [(match_operand:SI 0 "register_operand" "c")]
-	         UNSPEC_EH_RETURN))]
+  [(unspec_volatile [(match_operand:SI 0 "register_operand" "c")]
+		    UNSPECV_EH_RETURN)]
   "!TARGET_64BIT"
   "#"
   "reload_completed"
@@ -13912,9 +13907,8 @@
   "ix86_expand_epilogue (2); DONE;")
 
 (define_insn_and_split "eh_return_di"
-  [(set (pc) 
-        (unspec [(match_operand:DI 0 "register_operand" "c")]
-	         UNSPEC_EH_RETURN))]
+  [(unspec_volatile [(match_operand:DI 0 "register_operand" "c")]
+		    UNSPECV_EH_RETURN)]
   "TARGET_64BIT"
   "#"
   "reload_completed"

gcc/except.c

@@ -3145,11 +3145,6 @@ can_throw_internal (rtx insn)
       return false;
     }
 
-  if (GET_CODE (insn) == JUMP_INSN
-      && GET_CODE (PATTERN (insn)) == RESX
-      && XINT (PATTERN (insn), 0) > 0)
-    return can_throw_internal_1 (XINT (PATTERN (insn), 0));
-
   /* Every insn that might throw has an EH_REGION note.  */
   note = find_reg_note (insn, REG_EH_REGION, NULL_RTX);
   if (!note || INTVAL (XEXP (note, 0)) <= 0)