Again reland "Refine expression typing, esp. by propagating range information."

This relands commit 24552.

TBR=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/650513003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24615 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
[turbofan] fix block mapping in code comments

R=bmeurer@chromium.org

BUG=

Review URL: https://codereview.chromium.org/635213003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24616 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Remove test-api/Regress2107 since it doesn't test what Chrome does.

BUG=v8:3625
LOG=N
R=jochen@chromium.org

Review URL: https://codereview.chromium.org/657033003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24617 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Let FastCloneShallowObjectStub work with empty literal objects.

R=verwaest@chromium.org

LOG=N

BUG=417290

Review URL: https://codereview.chromium.org/655163002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24618 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
[x86] Several small performance improvements.

- Generate

    cmp reg, 0

  instead of

    test reg, -1

  for word tests.
- Generate

    mov reg, [stack slot]
    add reg, reg
    jo label

  instead of

    mov reg, [stack slot]
    add reg, [stack slot]
    jo label

  for SMI tagging.
- Improve materialization of int32 constants on X86-64.
- Branch fusion fix for Word64And and Int64Sub on X86-64.

R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/651383003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24619 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Array.prototype.{every, filter, find, findIndex, forEach, map, some}: Use fresh primitive wrapper for calls.

When the receiver is a primitive value, it's cast to an Object before entering the loop. Instead, it should be cast to an Object for each function call while in the loop.

BUG=v8:3536
LOG=Y
R=arv@chromium.org, svenpanne@chromium.org, wingo@igalia.com

Review URL: https://codereview.chromium.org/553413002

Patch from Diego Pino <dpino@igalia.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24620 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Initialize double values before calling rempio2.

R=ishell@chromium.org
BUG=chromium:421981
LOG=N

Review URL: https://codereview.chromium.org/645243003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24621 ce2b1a6d-e550-0410-aec6-3dcde31c8c00