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| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2014-03-29 19:44:04 +0100 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2014-03-29 19:44:04 +0100 |
| commit | cde97a4d5f17fe597cc55aa4653082bf2c01598c (patch) | |
| tree | 449fdbe028b01b9d21031c0696ba125edebc3ebe /sys/src/cmd/grep/comp.c | |
| parent | 91bed257fa7382c90fdd9d99089442b453090bba (diff) | |
6c, 8c: optimize away CMPL/CMPQ reg, $0 instruction in peephole pass
when the previous instruction sets the zero flag,
we can remove the CMPL/CMPQ instruction.
this removes compares for zero/non zero tests only.
it only looks at the previous non-nop instruction
to see if it sets our compare value register.
Diffstat (limited to 'sys/src/cmd/grep/comp.c')
0 files changed, 0 insertions, 0 deletions