diff options
Diffstat (limited to 'gcc/config/sh/sh.md')
| -rw-r--r-- | gcc/config/sh/sh.md | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/gcc/config/sh/sh.md b/gcc/config/sh/sh.md index a74e17f..7b68aa1 100644 --- a/gcc/config/sh/sh.md +++ b/gcc/config/sh/sh.md @@ -2056,14 +2056,20 @@ [(set_attr "type" "arith_media") (set_attr "highpart" "ignore")]) +;; The *addsi3_compact is made an insn_and_split and accepts actually +;; impossible constraints to make LRA's register elimination work well on SH. +;; The problem is that LRA expects something like +;; (set rA (plus rB (const_int N))) +;; to work. We can do that, but we have to split out an additional reg-reg +;; copy before the actual add insn. (define_insn_and_split "*addsi3_compact" [(set (match_operand:SI 0 "arith_reg_dest" "=r,&r") (plus:SI (match_operand:SI 1 "arith_operand" "%0,r") (match_operand:SI 2 "arith_or_int_operand" "rI08,rn")))] "TARGET_SH1 - && (rtx_equal_p (operands[0], operands[1]) - && arith_operand (operands[2], SImode)) - || ! reg_overlap_mentioned_p (operands[0], operands[1])" + && ((rtx_equal_p (operands[0], operands[1]) + && arith_operand (operands[2], SImode)) + || ! reg_overlap_mentioned_p (operands[0], operands[1]))" "@ add %2,%0 #" |