From 4ffc4134c790d2d2543de6cdc3c291692b5f492a Mon Sep 17 00:00:00 2001 From: Nick Clifton Date: Tue, 17 May 2011 08:36:44 +0000 Subject: [PATCH] rx.md: Add peephole to remove redundant extensions after loads. * config/rx/rx.md: Add peephole to remove redundant extensions after loads. From-SVN: r173820 --- gcc/ChangeLog | 5 +++++ gcc/config/rx/rx.md | 29 +++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 8ceeac30236..637241fbf56 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2011-05-17 Nick Clifton + + * config/rx/rx.md: Add peephole to remove redundant extensions + after loads. + 2011-05-17 Kazuhio Inaoka Nick Clifton diff --git a/gcc/config/rx/rx.md b/gcc/config/rx/rx.md index fdbf2876a3e..227fe310059 100644 --- a/gcc/config/rx/rx.md +++ b/gcc/config/rx/rx.md @@ -1701,6 +1701,35 @@ (extend_types:SI (match_dup 1))))] ) +;; Convert: +;; (set (reg1) (sign_extend (mem)) +;; (set (reg2) (zero_extend (reg1)) +;; into +;; (set (reg2) (zero_extend (mem))) +(define_peephole2 + [(set (match_operand:SI 0 "register_operand") + (sign_extend:SI (match_operand:small_int_modes 1 "memory_operand"))) + (set (match_operand:SI 2 "register_operand") + (zero_extend:SI (match_operand:small_int_modes 3 "register_operand")))] + "REGNO (operands[0]) == REGNO (operands[3]) + && (REGNO (operands[0]) == REGNO (operands[2]) + || peep2_regno_dead_p (2, REGNO (operands[0])))" + [(set (match_dup 2) + (zero_extend:SI (match_dup 1)))] +) + +;; Remove the redundant sign extension from: +;; (set (reg) (extend (mem))) +;; (set (reg) (extend (reg))) +(define_peephole2 + [(set (match_operand:SI 0 "register_operand") + (extend_types:SI (match_operand:small_int_modes 1 "memory_operand"))) + (set (match_dup 0) + (extend_types:SI (match_operand:small_int_modes 2 "register_operand")))] + "REGNO (operands[0]) == REGNO (operands[2])" + [(set (match_dup 0) (extend_types:SI (match_dup 1)))] +) + (define_insn "comparesi3_" [(set (reg:CC CC_REG) (compare:CC (match_operand:SI 0 "register_operand" "=r") -- 2.30.2