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PR target/19293 PR target/19329 * config/avr/avr.c (notice_update_cc): Only set condition code for ashrqi3 if shift count > 0. (out_shift_with_cnt): Handle shift count <= 0 as a no-op. (ashlqi3_out, ashlhi3_out, ashlsi3_out, ashrqi3_out, ashrhi3_out, ashrsi3_out, lshrqi3_out, lshrhi3_out, lshrsi3_out): Handle shift count <= 0 as a no-op, and shift count >= width by copying zero or sign bit to all bits of the result. * config/avr/avr.md (all shifts): Add alternatives for zero shift count, with attribute "length" set to 0 and "cc" set to "none". From-SVN: r94288
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