tree bb13ea51beae35d8f6a28673c49fa7cc6bf4ba9d
parent 209318af2b035d729225c5d86dbeb27935ebfafb
author Andrew Scull <ascull@google.com> 1440105785 -0700
committer Andrew Scull <ascull@google.com> 1440105785 -0700

Inline memove for small constant sizes and refactor memcpy and memset.

The memory intrinsics are only optimized at -O1 and higher unless the
-fmem-intrin-opt flag is set to force to optimization to take place.

This change also introduces the xchg instruction for two register operands. This
is no longer used in the memory intrinsic lowering (or by anything else) but the
implementation is left for future use.

BUG=
R=jvoung@chromium.org, stichnot@chromium.org

Review URL: https://codereview.chromium.org/1278173009.