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| author | Nick Clifton <nickc@gcc.gnu.org> | 2015-06-03 12:59:38 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@gcc.gnu.org> | 2015-06-03 12:59:38 +0000 |
| commit | fddde8d3d82bf11fa191d067dcf3ed505224089a (patch) | |
| tree | e0bc4f4a51d0f86a089bcef35a324dd324abffef | |
| parent | 9ce3eaa4fffc00adae2006fc59f8d1434496bb92 (diff) | |
| download | gcc-fddde8d3d82bf11fa191d067dcf3ed505224089a.zip gcc-fddde8d3d82bf11fa191d067dcf3ed505224089a.tar.gz gcc-fddde8d3d82bf11fa191d067dcf3ed505224089a.tar.bz2 | |
rl78-real.md: Add peepholes to avoid a register copy when calling a function.
* config/rl78/rl78-real.md: Add peepholes to avoid a register
copy when calling a function.
* config/rl78/rl78.c (need_to_save): Do not push the frame
pointer in an interrupt handler prologue if it is never used.
From-SVN: r224076
| -rw-r--r-- | gcc/ChangeLog | 9 | ||||
| -rw-r--r-- | gcc/config/rl78/rl78-real.md | 38 | ||||
| -rw-r--r-- | gcc/config/rl78/rl78.c | 6 |
3 files changed, 50 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b1b3dc6..cab2f38 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2015-06-03 Nick Clifton <nickc@redhat.com> + + * config/rl78/rl78-real.md: Add peepholes to avoid a register + copy when calling a function. + * config/rl78/rl78.c (need_to_save): Do not push the frame + pointer in an interrupt handler prologue if it is never used. + 2015-06-03 Kyrylo Tkachov <kyrylo.tkachov@arm.com> * ifcvt (end_ifcvt_sequence): Fix typo in comment above. @@ -44,7 +51,7 @@ 2015-06-03 Andrew Bennett <andrew.bennett@imgtec.com> - * explow.c (plus_constant): Update check after force_const_mem call + * explow.c (plus_constant): Update check after force_const_mem call to see if the value returned is not a NULL_RTX. 2015-06-03 Ilya Enkovich <ilya.enkovich@intel.com> diff --git a/gcc/config/rl78/rl78-real.md b/gcc/config/rl78/rl78-real.md index f6ab7ff..d6324e5 100644 --- a/gcc/config/rl78/rl78-real.md +++ b/gcc/config/rl78/rl78-real.md @@ -342,6 +342,25 @@ [(set (attr "update_Z") (const_string "clobber"))] ) +;; Peephole to match: +;; +;; (set (reg1) (reg2)) +;; (call (mem (reg1))) +;; +;; and replace it with: +;; +;; (call (mem (reg2))) + +(define_peephole2 + [(set (match_operand:HI 0 "register_operand") (match_operand:HI 1 "register_operand")) + (call (mem:HI (match_dup 0))(const_int 0)) + ] + "peep2_regno_dead_p (2, REGNO (operands[0])) + && REGNO (operands[1]) < 8" + [(call (mem:HI (match_dup 1))(const_int 0)) + ] +) + (define_insn "*call_value_real" [(set (match_operand 0 "register_operand" "=v,v") (call (match_operand:HI 1 "memory_operand" "Wab,Wca") @@ -353,6 +372,25 @@ [(set (attr "update_Z") (const_string "clobber"))] ) +;; Peephole to match: +;; +;; (set (reg1) (reg2)) +;; (set (reg3) (call (mem (reg1)))) +;; +;; and replace it with: +;; +;; (set (reg3) (call (mem (reg2)))) + +(define_peephole2 + [(set (match_operand:HI 0 "register_operand") (match_operand:HI 1 "register_operand")) + (set (match_operand:HI 2 "register_operand") (call (mem:HI (match_dup 0))(const_int 0))) + ] + "peep2_regno_dead_p (2, REGNO (operands[0])) + && REGNO (operands[1]) < 8" + [(set (match_dup 2) (call (mem:HI (match_dup 1))(const_int 0))) + ] +) + (define_insn "*cbranchqi4_real_signed" [(set (pc) (if_then_else (match_operator 0 "rl78_cmp_operator_signed" diff --git a/gcc/config/rl78/rl78.c b/gcc/config/rl78/rl78.c index 6a15f91..c6a0d57 100644 --- a/gcc/config/rl78/rl78.c +++ b/gcc/config/rl78/rl78.c @@ -678,8 +678,10 @@ need_to_save (unsigned int regno) /* If the handler is a non-leaf function then it may call non-interrupt aware routines which will happily clobber - any call_used registers, so we have to preserve them. */ - if (!crtl->is_leaf && call_used_regs[regno]) + any call_used registers, so we have to preserve them. + We do not have to worry about the frame pointer register + though, as that is handled below. */ + if (!crtl->is_leaf && call_used_regs[regno] && regno < 22) return true; /* Otherwise we only have to save a register, call_used |