What about x64?
https://codereview.chromium.org/22670004/diff/1/src/ia32/macro-assembler-ia32.cc
File src/ia32/macro-assembler-ia32.cc (right):
https://codereview.chromium.org/22670004/diff/1/src/ia32/macro-assembler-ia32.cc#newcode68
src/ia32/macro-assembler-ia32.cc:68: roots_array_start));
The two moves all be done in one instruction, you might have to add
other infrastructure for that but I would hate to make this code
sequence so long if you are cleaning . Comment holds for instances
below, too.
If you do that, you probably don't need a scratch register, either.
https://codereview.chromium.org/22670004/
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