commit 6ae030590dd7e58a914486e53df35571cd91b638
author ssanfilippo <ssanfilippo@chromium.org> Thu Feb 25 12:07:07 2016
committer Commit bot <commit-bot@chromium.org> Thu Feb 25 12:07:19 2016
tree 82b19ff141128c511ed0378ccee1c3d927bbabd6
parent 6695290c5e7efbfbea24bc70ff7e2f8558f000c8

[Interpreter] Refactor bytecode generator test suite.

Bytecode expectations have been moved to external (.golden) files,
one per test. Each test in the suite builds a representation of the
the compiled bytecode using BytecodeExpectationsPrinter. The output is
then compared to the golden file. If the comparision fails, a textual
diff can be used to identify the discrepancies.

Only the test snippets are left in the cc file, which also allows to
make it more compact and meaningful. Leaving the snippets in the cc
file was a deliberate choice to allow keeping the "truth" about the
tests in the cc file, which will rarely change, as opposed to golden
files.

Golden files can be generated and kept up to date using
generate-bytecode-expectations, which also means that the test suite
can be batch updated whenever the bytecode or golden format changes.

The golden format has been slightly amended (no more comments about
`void*`, add size of the bytecode array) following the consideration
made while converting the tests.

There is also a fix: BytecodeExpectationsPrinter::top_level_ was left
uninitialized, leading to undefined behaviour.

BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1717293002

Cr-Commit-Position: refs/heads/master@{#34285}