Reviewers: Michael Achenbach,

Description:
Merged r19693, r19694, r19847, r19893 into 3.24 branch.

Fix HConstants with Smi-ranged HeapNumber values

Fix for failing asserts in HBoundsCheck code generation on x64: use proper cmp
operation width instead of asserting that Integer32 values should be zero
extended. Similar to chromium:345820.

KeyedStoreIC miss didn't handle a transitioning case.

BUG=chromium:349878,349465,350884
LOG=N
[email protected]

Please review this at https://codereview.chromium.org/201763002/

SVN Base: https://v8.googlecode.com/svn/branches/3.24

Affected files (+84, -42 lines):
  M src/hydrogen-instructions.cc
  M src/ic.cc
  M src/version.cc
  M src/x64/lithium-codegen-x64.cc
  A + test/mjsunit/regress/regress-350884.js
  A test/mjsunit/regress/regress-crbug-349465.js
  A + test/mjsunit/regress/regress-crbug-349878.js


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