Also refactor the unit tests and add support to easily
match DAGs using CaptureEq() matcher.

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

Review URL: https://codereview.chromium.org/480863002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23140 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

Breaks compilation on Mac64

| TEST=compiler-unittests
| R=jarin@chromium.org
|
| Committed: https://code.google.com/p/v8/source/detail?r=23077

TBR=bmeurer@chromium.org,jarin@chromium.org
LOG=n
BUG=none

Review URL: https://codereview.chromium.org/456843004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23079 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TEST=compiler-unittests
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/466673004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23077 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ChangeLowering is a Reducer to lower simplified change operators
to machine subgraphs. This initial version supports ChangeBitToBool,
ChangeBoolToBit, ChangeTaggedToFloat64 and ChangeInt32ToTagged.

TEST=compiler-unittests/change-lowering-unittest
BUG=v8:3489
LOG=n
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/460593003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23068 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/453363002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23018 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This may be required for https://codereview.chromium.org/425333002 to
land in Chromium.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/448053002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22951 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=jochen@chromium.org

Review URL: https://codereview.chromium.org/441873008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22870 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts commit r22847 and r22848. Isolate initialization/shutdown
still broken (so certain debug builds just crash), and our compiler flags
do not work with other Google projects (i.e. GTest/GMock).

TBR=jochen@chromium.org

Review URL: https://codereview.chromium.org/438243003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22855 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jochen@chromium.org, svenpanne@chromium.org

Review URL: https://codereview.chromium.org/439863004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22847 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Because Benedikt said so.

BUG=none
LOG=y
R=bmeurer@chromium.org, machenbach@chromium.org

Review URL: https://codereview.chromium.org/434423002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22806 ce2b1a6d-e550-0410-aec6-3dcde31c8c00