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| author | Georg-Johann Lay <avr@gjlay.de> | 2016-11-28 09:28:45 +0000 |
|---|---|---|
| committer | Georg-Johann Lay <gjl@gcc.gnu.org> | 2016-11-28 09:28:45 +0000 |
| commit | 193273638fffd7a53434e11b28f817015aac9cc4 (patch) | |
| tree | 18765c605d646abf4e6a355fef64530ad5a4b89b /gcc | |
| parent | 03612f25277590cac3df470f07e032cbc30fd7d6 (diff) | |
| download | gcc-193273638fffd7a53434e11b28f817015aac9cc4.zip gcc-193273638fffd7a53434e11b28f817015aac9cc4.tar.gz gcc-193273638fffd7a53434e11b28f817015aac9cc4.tar.bz2 | |
avr.c (out_movhi_r_mr): Only SBIW if X is not unused after.
* config/avr/avr.c (out_movhi_r_mr) [REG_X + PLUS]: Only SBIW if
X is not unused after.
From-SVN: r242909
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/avr/avr.c | 26 |
2 files changed, 21 insertions, 10 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5b8913f..0c09fb0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2016-11-28 Georg-Johann Lay <avr@gjlay.de> + + * config/avr/avr.c (out_movhi_r_mr) [REG_X + PLUS]: Only SBIW if + X is not unused after. + 2016-11-28 Bernd Schmidt <bschmidt@redhat.com> PR rtl-optimization/78120 diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c index ba00147..d0c54c2 100644 --- a/gcc/config/avr/avr.c +++ b/gcc/config/avr/avr.c @@ -4028,16 +4028,22 @@ out_movhi_r_mr (rtx_insn *insn, rtx op[], int *plen) optimization options. */ if (reg_base == REG_X) - return reg_base == reg_dest - ? avr_asm_len ("adiw r26,%o1" CR_TAB - "ld __tmp_reg__,X+" CR_TAB - "ld %B0,X" CR_TAB - "mov %A0,__tmp_reg__", op, plen, -4) - - : avr_asm_len ("adiw r26,%o1" CR_TAB - "ld %A0,X+" CR_TAB - "ld %B0,X" CR_TAB - "sbiw r26,%o1+1", op, plen, -4); + { + if (reg_base == reg_dest) + return avr_asm_len ("adiw r26,%o1" CR_TAB + "ld __tmp_reg__,X+" CR_TAB + "ld %B0,X" CR_TAB + "mov %A0,__tmp_reg__", op, plen, -4); + + avr_asm_len ("adiw r26,%o1" CR_TAB + "ld %A0,X+" CR_TAB + "ld %B0,X", op, plen, -3); + + if (!reg_unused_after (insn, XEXP (base, 0))) + avr_asm_len ("sbiw r26,%o1+1", op, plen, 1); + + return ""; + } return reg_base == reg_dest ? avr_asm_len ("ldd __tmp_reg__,%A1" CR_TAB |