https://codereview.chromium.org/893073006/diff/1/src/hydrogen-instructions.h
File src/hydrogen-instructions.h (right):
https://codereview.chromium.org/893073006/diff/1/src/hydrogen-instructions.h#newcode6404
src/hydrogen-instructions.h:6404: ReadBarrierField::encode(read_barrier
? 1 : 0) |
I like that.
https://codereview.chromium.org/893073006/diff/1/src/ia32/macro-assembler-ia32.cc
File src/ia32/macro-assembler-ia32.cc (right):
https://codereview.chromium.org/893073006/diff/1/src/ia32/macro-assembler-ia32.cc#newcode2429
src/ia32/macro-assembler-ia32.cc:2429: // indicates the cell has been
read from.
This seems to be more expensive than just clearing a bit. The advantage
is, that we do not slow down the case when we can go directly to the
value (omit read barrier). I guess we have to measure the performance
impact.
https://codereview.chromium.org/893073006/
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