LGTM with comments.
https://codereview.chromium.org/23619076/diff/1/src/ia32/lithium-codegen-ia32.cc
File src/ia32/lithium-codegen-ia32.cc (right):
https://codereview.chromium.org/23619076/diff/1/src/ia32/lithium-codegen-ia32.cc#newcode352
src/ia32/lithium-codegen-ia32.cc:352: __ test(ebx,
Immediate(kPointerSize));
Couldn't you test ebp directly? Something like
test(ebp, Immediate(kPointerSize));
j(zero, &do_not_pad)
https://codereview.chromium.org/23619076/diff/1/src/ia32/lithium-codegen-ia32.cc#newcode372
src/ia32/lithium-codegen-ia32.cc:372: __ bind(&do_not_pad);
You can probably save a instruction per loop if you use ecx as negative
index with ebp as base pointer, and increment ecx by a word in each loop
until it hits zero.
But this is easier to read, so I'm also fine with this.
https://codereview.chromium.org/23619076/
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