Basically a follow-up to https://codereview.chromium.org/667573005/.

LOG=y
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/670673002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24755 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Implement NodeCache in terms of base::hash and std::equal_to in preparation
for HeapConstant caching.

TEST=cctest,unittests
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/624153003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24412 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=bmeurer@chromium.org
TEST=compiler-unittests/JSBuiltinReducerTest.MathImul

Review URL: https://codereview.chromium.org/591373003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24144 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Our own ARRAY_SIZE() was pretty bad at error checking. If you use
arrasize() in a wrong way, the compiler will issue an error instead of
silently doing the wrong thing. The previous ARRAY_SIZE() macro is still
available as ARRAYSIZE_UNSAFE() similar to Chrome.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/501323002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23389 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Also fix some issues and improve test coverage.

TEST=compiler-unittests
BUG=v8:3489
LOG=y
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/469743002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23111 ce2b1a6d-e550-0410-aec6-3dcde31c8c00