LGTM
http://codereview.chromium.org/8638012/diff/1/src/arm/code-stubs-arm.cc File src/arm/code-stubs-arm.cc (right): http://codereview.chromium.org/8638012/diff/1/src/arm/code-stubs-arm.cc#newcode362 src/arm/code-stubs-arm.cc:362: __ cmp(r3, ip); Seems like you could use CompareRoot here. http://codereview.chromium.org/8638012/diff/1/src/arm/code-stubs-arm.cc#newcode366 src/arm/code-stubs-arm.cc:366: // statically determine the instance size. As discussed offline this can be omitted for MOAR speed in the next CL. http://codereview.chromium.org/8638012/ -- v8-dev mailing list v8-dev@googlegroups.com http://groups.google.com/group/v8-dev