rtl.def (COND_EXEC): Clarify.

	* rtl.def (COND_EXEC): Clarify.

	* i386.md (extendsidi2): Clobber (reg:CC 17) in the
	same fashion as zero_extendsidi2.

From-SVN: r33756

gcc/ChangeLog

+Sun May  7 00:54:57 EDT 2000  John Wehle  (john@feith.com)
+
+	* rtl.def (COND_EXEC): Clarify.
+
+	* i386.md (extendsidi2): Clobber (reg:CC 17) in the
+	same fashion as zero_extendsidi2.
+
 2000-05-06  Richard Henderson  <rth@cygnus.com>
 
 	* config/ia64/ia64.c (predicate_operator): New.

gcc/config/i386/i386.md

@@ -2642,8 +2642,8 @@
 (define_insn "extendsidi2"
   [(set (match_operand:DI 0 "nonimmediate_operand" "=*A,r,?r,?*o")
 	(sign_extend:DI (match_operand:SI 1 "register_operand" "0,0,r,r")))
-   (clobber (match_scratch:SI 2 "=X,X,X,&r"))
-   (clobber (reg:CC 17))]
+   (clobber (reg:CC 17))
+   (clobber (match_scratch:SI 2 "=X,X,X,&r"))]
   ""
   "#")
 
@@ -2651,8 +2651,8 @@
 (define_split 
   [(set (match_operand:DI 0 "memory_operand" "")
 	(sign_extend:DI (match_operand:SI 1 "register_operand" "")))
-   (clobber (match_operand:SI 2 "register_operand" ""))
-   (clobber (reg:CC 17))]
+   (clobber (reg:CC 17))
+   (clobber (match_operand:SI 2 "register_operand" ""))]
   "(reload_completed
     && dead_or_set_p (insn, operands[1])
     && !reg_mentioned_p (operands[1], operands[0]))"
@@ -2666,8 +2666,8 @@
 (define_split 
   [(set (match_operand:DI 0 "memory_operand" "")
 	(sign_extend:DI (match_operand:SI 1 "register_operand" "")))
-   (clobber (match_operand:SI 2 "register_operand" ""))
-   (clobber (reg:CC 17))]
+   (clobber (reg:CC 17))
+   (clobber (match_operand:SI 2 "register_operand" ""))]
   "reload_completed"
   [(const_int 0)]
   "
@@ -2697,8 +2697,8 @@
 (define_split 
   [(set (match_operand:DI 0 "register_operand" "")
 	(sign_extend:DI (match_operand:SI 1 "register_operand" "")))
-   (clobber (match_scratch:SI 2 ""))
-   (clobber (reg:CC 17))]
+   (clobber (reg:CC 17))
+   (clobber (match_scratch:SI 2 ""))]
   "reload_completed"
   [(const_int 0)]
   "

gcc/rtl.def

@@ -434,7 +434,16 @@ DEF_RTL_EXPR(NOTE, "note", "iuu0n", 'x')
    Top level constituents of INSN, JUMP_INSN and CALL_INSN.
    ---------------------------------------------------------------------- */
    
-/* Several operations to be done in parallel.  */
+/* Conditionally execute code.
+   Operand 0 is the condition that if true, the code is executed.
+   Operand 1 is the code to be executed (typically a SET). 
+
+   Semantics are that there are no side effects if the condition
+   is false.  This pattern is created automatically by the if_convert
+   pass run after reload or by target-specific splitters.  */
+DEF_RTL_EXPR(COND_EXEC, "cond_exec", "ee", 'x')
+
+/* Several operations to be done in parallel (perhaps under COND_EXEC).  */
 DEF_RTL_EXPR(PARALLEL, "parallel", "E", 'x')
 
 /* A string that is passed through to the assembler as input.
@@ -936,13 +945,6 @@ DEF_RTL_EXPR(CALL_PLACEHOLDER, "call_placeholder", "uuuu", 'x')
    of canonical RTL.  It is, however, easier to manipulate this way.  */
 DEF_RTL_EXPR(PHI, "phi", "E", 'x')
 
-/* Conditionally execute code.
-   Operand 0 is the condition that if true, the code is executed.
-   Operand 1 is the code to be executed (typically a SET). 
-
-   Semantics are that there are no side effects if the condition
-   is false.  */
-DEF_RTL_EXPR(COND_EXEC, "cond_exec", "ee", 'x')
 
 /*
 Local variables: