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microblaze.md: Add expander for simple_return...

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* config/microblaze/microblaze.md: Add expander for simple_return,
  return, add return_internal and simple_return_internal insns.

From-SVN: r182725
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Michael Eager 2011-12-29 15:50:28 +00:00 committed by Michael Eager
parent 10b293bbd0
commit 1893a69a50
2 changed files with 31 additions and 8 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2011-12-29 Michael Eager <eager@eagercon.com>
* config/microblaze/microblaze.md: Add expander for simple_return,
return, add return_internal and simple_return_internal insns.
2011-12-29 Oleg Endo <olegendo@gcc.gnu.org>
* config/sh/sh.h (BRANCH_COST): Use sh_branch_cost variable.

34
gcc/config/microblaze/microblaze.md
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@ -82,6 +82,13 @@
;; # instructions (4 bytes each)
(define_attr "length" "" (const_int 4))
(define_code_iterator any_return [return simple_return])
;; <optab> expands to the name of the optab for a particular code.
(define_code_attr optab [(return "return")
(simple_return "simple_return")])
;;----------------------------------------------------
;; Attribute describing the processor.
;;----------------------------------------------------
@ -1936,9 +1943,21 @@
;; Trivial return. Make it look like a normal return insn as that
;; allows jump optimizations to work better .
(define_insn "return"
[(return)]
(define_expand "return"
[(simple_return)]
"microblaze_can_use_return_insn ()"
{}
)
(define_expand "simple_return"
[(simple_return)]
""
{}
)
(define_insn "*<optab>"
[(any_return)]
""
{
if (microblaze_is_interrupt_handler ())
return "rtid\tr14, 0\;%#";
@ -1947,15 +1966,14 @@
}
[(set_attr "type" "jump")
(set_attr "mode" "none")
(set_attr "length" "4")])
(set_attr "length" "4")]
)
;; Normal return.
;; We match any mode for the return address, so that this will work with
;; both 32 bit and 64 bit targets.
(define_insn "return_internal"
[(parallel [(use (match_operand:SI 0 "register_operand" ""))
(return)])]
(define_insn "<optab>_internal"
[(any_return)
(use (match_operand:SI 0 "register_operand" ""))]
""
{
if (microblaze_is_interrupt_handler ())