From f3926c48ee7655ff6bfef597458f9f1ebcdbbbf7 Mon Sep 17 00:00:00 2001 From: Kazu Hirata Date: Sun, 30 Mar 2003 13:00:32 +0000 Subject: [PATCH] * config/h8300/h8300.md (a peephole2): Remove useless code. From-SVN: r65039 --- gcc/ChangeLog | 4 ++++ gcc/config/h8300/h8300.md | 5 ++++- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index be4f3dd3aceb..871f97269f46 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2003-03-30 Kazu Hirata + + * config/h8300/h8300.md (a peephole2): Remove useless code. + 2003-03-29 Kazu Hirata * config/h8300/h8300.md (*iorsi3_and_ashift): New. diff --git a/gcc/config/h8300/h8300.md b/gcc/config/h8300/h8300.md index 8c8ed6d306de..b63ed49decc6 100644 --- a/gcc/config/h8300/h8300.md +++ b/gcc/config/h8300/h8300.md @@ -3934,6 +3934,9 @@ (const_int 8)))] "") +;; If a load of mem:SI is followed by an AND that turns off the upper +;; half, then we can load mem:HI instead. + (define_peephole2 [(set (match_operand:SI 0 "register_operand" "") (match_operand:SI 1 "memory_operand" "")) @@ -3941,7 +3944,7 @@ (and:SI (match_dup 0) (match_operand:SI 2 "const_int_operand" "")))] "(TARGET_H8300H || TARGET_H8300S) - && !(GET_CODE (operands[1]) == MEM && MEM_VOLATILE_P (operands[1])) + && !MEM_VOLATILE_P (operands[1]) && (INTVAL (operands[2]) & ~0xffff) == 0 && INTVAL (operands[2]) != 255" [(set (match_dup 3) -- 2.47.3