cmd/compile: don't use REP prefix for reverse-order copying on amd64, 386

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cmd/compile: don't use REP prefix for reverse-order copying on amd64, 386 #7681

Open randall77 opened 10 years ago

randall77 commented 10 years ago

REP prefixes have a high startup cost.  Most were eliminated with CL 81370046.  For
overlapping source/destinations when we have to copy in descending address order, they
are still used.  Fix that.

ianlancetaylor commented 10 years ago

Comment 1:

Labels changed: added repo-main, release-go1.4.

rsc commented 9 years ago

Comment 2:

Labels changed: added release-go1.5, removed release-go1.4.

Status changed to Accepted.